WO2024069625A1 - Appareil de propulsion pour plongée et natation pouvant être porté sur soi - Google Patents

Appareil de propulsion pour plongée et natation pouvant être porté sur soi Download PDF

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Publication number
WO2024069625A1
WO2024069625A1 PCT/IL2023/051032 IL2023051032W WO2024069625A1 WO 2024069625 A1 WO2024069625 A1 WO 2024069625A1 IL 2023051032 W IL2023051032 W IL 2023051032W WO 2024069625 A1 WO2024069625 A1 WO 2024069625A1
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WO
WIPO (PCT)
Prior art keywords
examples
fins
fin
unit
propulsion apparatus
Prior art date
Application number
PCT/IL2023/051032
Other languages
English (en)
Inventor
Hay-Amihay MINES
Original Assignee
Alfasurf Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alfasurf Ltd. filed Critical Alfasurf Ltd.
Publication of WO2024069625A1 publication Critical patent/WO2024069625A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/46—Divers' sleds or like craft, i.e. craft on which man in diving-suit rides
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B35/00—Swimming framework with driving mechanisms operated by the swimmer or by a motor
    • A63B35/08—Swimming framework with driving mechanisms operated by the swimmer or by a motor with propeller propulsion
    • A63B35/12—Swimming framework with driving mechanisms operated by the swimmer or by a motor with propeller propulsion operated by a motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B32/00—Water sports boards; Accessories therefor
    • B63B32/10—Motor-propelled water sports boards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B32/00—Water sports boards; Accessories therefor
    • B63B32/60—Board appendages, e.g. fins, hydrofoils or centre boards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
    • B63H21/17—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/02—Divers' equipment
    • B63C2011/028—Devices for underwater towing of divers or divers' sleds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H11/00—Marine propulsion by water jets
    • B63H11/02—Marine propulsion by water jets the propulsive medium being ambient water
    • B63H11/04—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps
    • B63H11/08—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps of rotary type
    • B63H2011/081—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps of rotary type with axial flow, i.e. the axis of rotation being parallel to the flow direction

Definitions

  • Underwater diving as a human activity, is the practice of descending below the water's surface to interact with the environment. This can include freediving, scuba diving, etc. Diving activities may be done for a variety of reasons, including recreational, professional, etc.
  • a wearable diving and swimming propulsion apparatus comprising: a base, configured to be positioned against the back of a diver; a plurality of fins secured to the base, each of the plurality of fins extending from the base along a respective vector; at least one motor; and at least one thruster configured to generate underwater thrust responsive to the at least one motor, wherein each of the at least one thruster comprises a respective propeller.
  • the at least one thruster comprises a plurality of thrusters, each of the plurality of thrusters juxtaposed with a respective one of the plurality of fins.
  • the base exhibits a central axis extending therethrough, wherein each of the plurality of thrusters exhibits a respective longitudinal axis, the propeller of the respective thruster configured to rotate about the respective longitudinal axis, and wherein the central axis is generally parallel to the longitudinal axis of each of the plurality of thrusters.
  • the central axis of the base is between the longitudinal axis of a first of the plurality of thrusters and the longitudinal axis of a second of the plurality of thruster. In some examples, a distance between the longitudinal axis of the first of the plurality of thrusters and the central axis of the base is substantially equal to a distance between the longitudinal axis of the second of the plurality of thrusters and the central axis of the base.
  • each of the plurality of fins extends from a first end thereof to a second end thereof, wherein the at least one thruster is positioned between the first end and the second end of a respective one of the plurality of fins.
  • the apparatus further comprises at least one power source configured to supply power to the at least one motor.
  • the at least one power source is secured to the base, between a first of the plurality of fins and a second of the plurality of fins.
  • at least one of the plurality of fins comprises a pair of walls, the inner surfaces of the pair of walls defining a hollow fin space therebetween, and wherein the at least one power source is situated within the hollow fin space of the at least one fin.
  • the apparatus further comprises a pair of side straps, each extending from a first end thereof to a second end thereof, wherein a first of the pair of side straps extends from a first side of the base, at the first end of the first side strap, wherein a second of the pair of side straps extends from a second side of the base, at the first end of the second side strap, wherein the second side of the base opposes the first side of the base, wherein the second ends of the pair of side straps are configured to be secured to each other.
  • the pair of side straps are configured to extend around a front of a torso of the diver.
  • the apparatus further comprises a pair of shoulder straps, each extending from a first end thereof to a second end thereof, wherein a first of the pair of shoulder straps extends from a first end of the base, at the first end of the first shoulder strap, wherein a second of the pair of shoulder straps extends from the first end of the base, at the first end of the second shoulder strap, and wherein the pair of shoulder straps are generally parallel to each other.
  • each of the pair of shoulder straps is configured to extend over a respective shoulder of the diver.
  • the second end of each of the pair of shoulder straps is configured to be secured to the pair of side straps.
  • the plurality of fins comprises two fins, an angle between the vectors of the two fins being about 180 degrees.
  • the plurality of fins comprises two fins, wherein the base defines a plane, the vectors of the two fins being parallel to the plane. In some examples, the plurality of fins further comprises a third fin, an angle between the vector of the third fin and the vectors of each of the two fins being about 90 degrees.
  • the plurality of fins comprises four fins, an angle between the vector of each of the four fins and the vector of an adj acent one of the four fins being about 90 degrees.
  • the base defines a plane, each of the vectors of the four fins exhibiting an angle of about 45 degrees with the plane.
  • the plurality of fins comprises four fins, a first of the four fins facing a second of the four fins and a third of the four fins facing a fourth of the four fins, wherein the direction of the vector of the first of the four fins is generally equal to the direction of the vector of the second of the four fins, and wherein the direction of the vector of the third of the four fins is generally equal to the direction of the vector of the fourth of the four fins.
  • the apparatus further comprises a fifth fin, an angle between the vector of the fifth fin and the vectors of each of the four fins being about 90 degrees.
  • the apparatus further comprises: a rotation mechanism; and a control circuitry, wherein the rotation mechanism is configured, responsive to the control circuitry to rotate one or more of the plurality of fins about one or more respective rotation axes.
  • the base defines a plane
  • the respective rotation axes comprise: a longitudinal axis of the base extending within the plane; an axis generally perpendicular to the longitudinal axis of the base and extending within the plane; and an axis generally perpendicular to the plane.
  • the rotation mechanism is configured, responsive to the control circuitry to rotate one or more of the plurality of fins about two or more of the respective rotation axes. In some examples, the rotation mechanism is configured, responsive to the control circuitry to rotate one or more of the plurality of fins about three or more of the respective rotation axes.
  • a length of each of the plurality of fins is 0.2 - 2 meters, a width of each of the plurality of fins is 0.2 - 2 meters and a thickness of each of the plurality of fins is less than 0.8 centimeters.
  • a method of diving and/or swimming comprising: securing the base of the wearable diving and swimming propulsion apparatus to the back of the diver; and operating the at least one motor.
  • FIG. 1 constitutes a view in perspective of a motorized surfboard 1, according to some examples.
  • Fig. 2A constitutes a view in perspective of an underwater power unit 10, according to some examples.
  • Fig. 2B constitutes a partially exploded view in perspective of the underwater power unit 10 from Fig. 2A, according to some examples.
  • Fig. 3 constitutes an exploded view of underwater power unit 10, according to some examples.
  • Fig. 4A constitutes a partial cross-sectional zoomed-in view of optional alternative power source housings 14 marked as region 4A in Fig. 3, according to some examples.
  • Fig. 4B constitutes a partial cross-sectional zoomed-in view of a main body 12 marked as region 4B in Fig. 3, according to some examples.
  • Fig. 4C constitutes a zoomed-in view of optional alternative rear units 21 marked as region 4C in Fig. 3, according to some examples.
  • Fig. 4D constitutes a partial cross-sectional zoomed-in view of optional alternative adaptor units 18 marked as region 4D in Fig. 3, according to some examples.
  • Figs. 4E-4F constitute views in perspective of different configurations of underwater power unit 10, according to some examples.
  • Fig. 4G constitutes a partial zoomed-in side view of optional alternative fin units 16 marked as region 4G in Fig. 3, according to some examples.
  • Fig. 5 illustrates various fin characteristics of fin unit 16, according to some examples.
  • Fig. 6 constitutes a functional block diagram depicting a control unit 40 corresponding to different examples of the present disclosure.
  • Figs. 7-8 constitute a view in perspective and a side view, respectively, of underwater power unit 110, according to some examples.
  • Fig. 9 constitutes a rear-view of underwater power unit 110, taken on line 9-9 of Fig. 8.
  • Fig. 10 constitutes a bottom-view of underwater power unit 110, taken on line 10-10 of Fig. 8.
  • Fig. 11 constitutes a top-view of underwater power unit 110, taken on line 11-11 of Fig.
  • Fig. 12 constitutes a cross-sectional view of underwater power unit 110, according to some examples.
  • Fig. 13 constitutes an exploded view in perspective of underwater power unit 110, according to some examples.
  • Fig. 14 constitutes a view in perspective of fin unit 116, according to some examples.
  • Fig. 15 constitute a view in perspective of underwater power unit 210, according to some examples.
  • Fig. 16 constitute a cross-sectional view of underwater power unit 210, according to some examples.
  • Fig. 17 constitutes an exploded view in perspective of underwater power unit 210, according to some examples.
  • Figs. 18A - 18F constitute various views of a wearable diving and swimming propulsion apparatus.
  • Figs. 19A - 19D constitute various high-level block diagrams of different configurations of fins of the wearable diving and swimming propulsion apparatus of Figs. 18A - 18F.
  • the present disclosure provides underwater power units, which according to some aspects are adapted to be detachably attached to a surfboard’s bottom at the tail section, thereby transforming a standard surfboard into a motorized surfboard.
  • the underwater power units of the present disclosure can be further adapted, according to some aspects, for diving and/or swimming applications.
  • the underwater power units of the present disclosure can be used to improve the control and stability of a user (e.g., a surfer) over a surfboard, during the various stages of surfing. Additionally, an underwater power unit can be further used to assist users to paddle out away from and/or back to, the shore. Since “catching a wave” requires the user to manually paddle and to build up adequate speed so that the surfboard can properly accelerate down a wave, the underwater power units of the present disclosure can further assist users to accelerate the surfboard in order to properly “catch a wave” with relative ease. Said advantages of the present underwater power units can be particularly useful for beginner users, who are not accustomed to the physical requirements and the operational maneuvers of surfing. Additionally, the advantages of the present underwater power units can be useful to users suffering or recovering from various types of injuries (such as but not limited to, arm, shoulder or back injuries).
  • injuries such as but not limited to, arm, shoulder or back injuries
  • an underwater power unit 10 there is provided an underwater power unit 10.
  • Fig. 1 constitutes a view in perspective of a motorized surfboard 1, according to some examples.
  • Fig. 1 illustrates the attachment of an underwater power unit 10 to a standard surfboard 2, in order to form a motorized surfboard 1, according to some examples.
  • the standard surfboard 2 is typically made from an elongated platform having an upper surfboard surface 7 configured to support the user (surfer), and a bottom surfboard surface 8 configured to face the water.
  • the standard surfboard 2 typically further comprise a surfboard nose 4 at the front, and a surfboard tail 6 at the rear side of the surfboard.
  • the standard surfboard 2 further comprise at least one standard slot (not shown) at the bottom surfboard surface 8 in the vicinity of the surfboard tail 6. Said at least one slot is configured to interact with or to receive a standard fin or rudder.
  • the standard surfboard 2 can be made from a variety of materials and have different dimensions and shapes, corresponding to various users and uses.
  • the standard surfboard 2 can be selected from a shortboard, longboard, soft-board, fish surfboard, funboard (Malibu) surfboard, gun surfboard, stand-up paddleboard (SUP), and variations thereof. Each possibility represents a separate example.
  • the terms “standard slot” and “fix box”, as used herein, are interchangeable, and refer to an elongated opening located at the bottom surfboard surface 8 in the vicinity of the surfboard tail 6, configured to interact with or to receive a standard fin or rudder, or the underwater power unit 10 of the present disclosure as detailed herein.
  • the standard slot can have different configurations, shapes or lengths, corresponding to various standard fin types having various types of tabs. According to some examples, the standard slot is selected from FCS fin box, FCS II fin box, futures fin box, O'Fish'l fix box, soft-board fix box, SUP fix box, and other fin boxes known in the art. Each possibility represents a separate example.
  • standard fin and “standard rudder”, as used herein, are interchangeable, and refer to a detachable fin of a modern surfboard.
  • the standard fin can be selected from various types of fins, such as FCS fins, FCS II fins, futures fins, or any other type of fin known in the art.
  • the standard surfboard 2 can have various fin configurations, such as a single fin, twin fin, thruster/tri fin, quad fin, 5-fin, or 2+1 fin configuration. Each possibility represents a separate example. According to some examples, the standard surfboard 2 comprise at least one, at least two, at least three, or at least four standard slots. According to some examples, the standard surfboard 2 comprises five standard slots. According to some examples, the standard surfboard 2 comprises a plurality of standard slots.
  • underwater power unit 10 is configured to be detachably attached to the at least one standard slot, without any structural modification to standard surfboard 2.
  • the standard surfboard 2 can be connected to a single underwater power unit 10.
  • the standard surfboard 2 can be connected to a plurality of underwater power units 10.
  • the standard surfboard 2 can be connected to a combination of standard fins and at least one underwater power unit 10.
  • the standard surfboard 2 can be connected to at least two standard fins and at least one underwater power unit 10, as illustrated at Fig. 1.
  • Fig. 2A constitutes a view in perspective of underwater power unit 10, according to some examples.
  • Fig. 2B constitutes a partially exploded view in perspective of the underwater power unit 10 from Fig. 2A.
  • Fig. 3 constitutes an exploded view of underwater power unit 10, according to some examples.
  • Fig. 4A constitutes a partial cross-sectional zoomed-in view of optional alternative power source housings 14 marked as region 4A in Fig. 3.
  • Fig. 4B constitutes a partial cross-sectional zoomed-in view of a main body 12 marked as region 4B in Fig. 3.
  • Fig. 4C constitutes a zoomed-in view of optional alternative rear units 21 marked as region 4C in Fig. 3.
  • Fig. 4D constitutes a partial cross- sectional zoomed-in view of optional alternative adaptor units 18 marked as region 4D in Fig. 3.
  • Figs 4E-4F constitute views in perspective of different configurations of underwater power unit 10, according to some examples.
  • Fig. 4G constitutes a partial zoomed-in side view of optional alternative fin units 16 marked as region 4G in Fig. 3.
  • Fig. 5 illustrates various fin characteristics of fin unit 16, according to some examples.
  • Fig. 6 constitutes a functional block diagram of a control unit 40 corresponding to different examples of the present disclosure.
  • underwater power unit 10 is suitable for underwater applications.
  • underwater power unit 10 comprises at least one material selected from metal, metal alloy, polymeric material (e.g., plastic), and combinations thereof. Each possibility represents a separate example.
  • underwater power unit 10 comprises a corrosion resist coating.
  • underwater power unit 10 is waterproof.
  • underwater power unit 10 is configured to be waterproof to a depth of at least about 5 meters below the surface of the water. According to further examples, underwater power unit 10 is configured to be waterproof to a depth of at least about 10 meters, at least about 30 meters, at least about 50 meters, at least about 70 meters, or at least about 100 meters below the surface of the water. Each possibility represents a separate example.
  • underwater power unit 10 extends from an underwater power unit front end 72 towards an underwater power unit rear end 74, along a central longitudinal axis 70.
  • underwater power unit 10 comprises a plurality of modular parts, configured to be detachably attached to each other.
  • underwater power unit 10 comprises a power source housing 14 comprising at least one power source 30 disposed within; a main body 12 comprising: an upper main body adaptor platform 28 configured to be detachably attached to an adaptor unit 18, a lower fin attachment section 27 configured to be detachably attached to a fin unit 16, and a motor 20 disposed within main body 12, wherein said motor 20 is configured to be coupled to a propeller 22 via a shaft 23; and a rear unit 21 encompassing said propeller 22 and a portion of said shaft 23.
  • lower fin attachment section 27 of main body 12 is integrally formed with fin unit 16.
  • main body 12 is integrally formed with fin unit 16.
  • motor 20 is coupled to a propeller 22 via a shaft 23.
  • shaft 23 extends from motor 20 in the distal direction 80 towards underwater power unit rear end 74.
  • motor 20 is configured to be electronically coupled to the at least one power source 30.
  • at least one of power source housing 14 and rear unit 21 is detachably attached to main body 12.
  • power source housing 14 is detachably attached to main body 12.
  • rear unit 21 is detachably attached to main body 12.
  • distal refers to a rearward direction along the central longitudinal axis, for example towards the underwater power unit rear end 74.
  • power source housing 14 extends from an underwater power unit front end 72 towards a power source housing opening 15.
  • main body 12 extends from a main body opening 12a towards rear unit 21.
  • rear unit 21 extends from main body 12 towards an underwater power unit rear end 74.
  • main body 12 comprises a main body top surface 76 and a main body bottom surface 78, located at opposing external surfaces of main body 12.
  • main body top surface 76 comprises upper main body adaptor platform 28.
  • main body bottom surface 78 comprises the lower fin attachment section 27.
  • upper main body adaptor platform 28 and lower fin attachment section 27 are located at opposing external surfaces of main body 12.
  • upper main body adaptor platform 28 is substantially parallel to central longitudinal axis 70.
  • fin attachment section is substantially parallel to central longitudinal axis 70.
  • substantially parallel refers to elements or axes that may be angled relative to each other by up to 15 degrees.
  • power source housing 14 is aligned with main body 12 along the central longitudinal axis 70, when attached thereto, as illustrated at Fig. 2A.
  • central longitudinal axis 70 extends through at least a portion of power source housing 14 and at least a portion of main body 12, when both are attached to each other.
  • power source housing 14, main body 12, and rear unit 21 are aligned with each other along the central longitudinal axis 70, when attached thereto, as illustrated at Fig. 2A.
  • central longitudinal axis 70 extends through at least a portion of power source housing 14, at least a portion of main body 12 and at least a portion of rear unit 21, when attached to each other.
  • power source housing 14 comprises at least one power source 30 disposed within, configured to be electronically connected, directly or indirectly, to motor 20 and to provide electric power thereto.
  • at least one power source 30 is rechargeable.
  • at least one power source 30 is a battery.
  • at least one power source 30 is selected from: nickel cadmium (NiCd) battery, lithium-ion (Li- ion) battery, lithium-ion polymer (Li-ion polymer) battery, lead-acid battery, nickel-metal hydride (NiMH) battery, combination thereof, and other known batteries in the art. Each possibility represents a separate example.
  • at least one power source 30 is a rechargeable lithium-ion polymer battery.
  • the battery may have a voltage output selected from, but not limited to, 14.8 V, 18.5 V, 22.2 V, 25.9 V. Each possibility represents a different example.
  • At least one power source 30 is characterized by having a power source length, along the central longitudinal axis 70, when connected to the main body 12.
  • the at least one power source 30 may have various power source lengths, wherein each length corresponds to a different voltage output of a battery.
  • at least one power source 30 comprises battery 30a.
  • at least one power source 30 comprises battery 30b.
  • the battery 30a may have a longer power source length compared to battery 30b, as illustrated at Fig. 4A, corresponding to a higher battery voltage output.
  • At least one power source 30 comprises a plurality of batteries.
  • at least one power source 30 comprises a plurality of batteries 30c, as schematically illustrated at Fig. 4A.
  • at least one power source 30 comprise at least two, at least three, at least four, at least five, at least six, at least eight, or at least ten batteries 30c.
  • at least one power source 30 comprise a plurality of rechargeable lithium-ion polymer batteries 30c.
  • power source housing 14 comprises a plurality of rechargeable lithium-ion polymer batteries 30c.
  • power source housing 14 further comprises at least one additional battery 30d, as illustrated at Fig. 4A.
  • the at least one additional battery 30d can be identical or different from the at least one power source 30.
  • at least one additional battery 30d is identical to at least one of: battery 30a, battery 30b, or battery 30c.
  • at least one additional battery 30d is disposed within a power source housing fin 90, wherein said power source housing fin 90 is located at an external surface of power source housing 14.
  • at least one additional battery 30d is configured to be electronically connected, directly or indirectly, to motor 20 and to provide electric power thereto, in addition to at least one power source 30. Without wishing to being bound by any theory of mechanism of action, it is contemplated that the power source housing fin 90 does not hinder of affect the hydrodynamic movement of underwater power unit 10 during operation thereof.
  • the present disclosure provides a plurality of power source housings 14 configured to be detachably attached to main body 12, wherein each power source housing 14 comprises at least one power source 30 disposed within, wherein each at least one power source 30 is a rechargeable battery having a different voltage output.
  • the present disclosure provides a plurality of power source housings 14 configured to be detachably attached to main body 12, wherein each power source housing 14 comprises a different battery configuration, having a different number of batteries disposed within.
  • the user can select a power source housing 14 having a specific battery configuration suitable to the user’ s requirements during surfing. Therefore, the user can purchase a single underwater power unit 10 with optionally several types of power source housings 14, each having a different voltage output, suitable to the requirements of various users. For example, it is possible that a beginner user will require a configuration of a heavy and large power source housing 14 optionally having a plurality of batteries or a single battery having a high voltage output for excessive assistance during surfing, while an experienced user will require a configuration of a light and small power source housing 14 having one battery having a low voltage output for modest assistance during surfing, that will not affect the hydrodynamic movement of the surfboard.
  • power source housing 14 further comprises a nose cap 34 located at underwater power unit front end 72, as illustrated at Fig. 2B.
  • nose cap 34 is integrally formed with power source housing 14.
  • the nose cap 34 may be affixed to power source housing 14, for example via application of suitable attachment materials, such as glues, resins, pastes and the like.
  • nose cap 34 is detachably attached to power source housing 14.
  • the nose cap 34 may be detachably attached to power source housing 14 through a fastening mechanism such as, but not limited to, snap-fit fastener mechanism, bayonet mount, screw fittings, or any structural mechanism similar thereto.
  • a fastening mechanism such as, but not limited to, snap-fit fastener mechanism, bayonet mount, screw fittings, or any structural mechanism similar thereto.
  • nose cap 34 comprises a threaded surface and is configured to threadedly engage with power source housing 14 (not shown).
  • at least one power source 30 can be easily inserted into and/or removed from power source housing 14 by the detachment of nose cap 34, without any structural modifications made to power source housing 14.
  • nose cap 34 is shaped as a nose cone.
  • the shape of nose cap 34 is a hydrodynamically efficient shape, configured to facilitate the adequate underwater movement of underwater power unit 10 with minimal water resistance.
  • nose cap 34 fulfills the same function and maintains its hydrodynamic qualities when otherwise shaped, as a simple cone, spherically blunted cone, tangent ogive, elliptical cone, spherically blunted tangent ogive, parabolic nose cone, combinations thereof, or any other polyhedron.
  • the cross-sectional shape of nose cap 34 is dome-shaped.
  • nose cap 34 may be of a different shape, such as a circular, triangular or any other curvilinear or rectilinear cross-section, as long as said shape maintains the hydrodynamic qualities of nose cap 34.
  • a different shape such as a circular, triangular or any other curvilinear or rectilinear cross-section, as long as said shape maintains the hydrodynamic qualities of nose cap 34.
  • power source housing 14 further comprises a first power connector 32b disposed within, extending from the at least one power source 30 in a distal direction 80, and configured to be electronically coupled to a second power connector 32a, wherein the second power connector 32a is disposed within main body 12, as illustrated at Fig. 2B.
  • first power connector 32b is configured to transfer electric power from at least one power source 30 to second power connector 32a, during the attachment of power source housing 14 to main body 12.
  • to second power connector 32a is configured to transfer said electric power, directly or indirectly, to motor 20.
  • first power connector 32b is attached to power source housing 14 utilizing a circumferential seal member (not shown), configured to provide waterproof sealing of the first power connector 32b thereto, thereby preventing water from entering into the interior of power source housing 14.
  • second power connector 32a is attached to main body 12 utilizing a circumferential seal member (not shown), configured to provide waterproof sealing of the second power connector 32a thereto, thereby preventing water from entering into the interior of main body 12.
  • the circumferential seal members can be a waterproof O-ring, or other known waterproof seal members known in the art. It is to be understood, that all of the sealing means or members within the scope of the present disclosure are waterproof.
  • First power connector 32b and second power connector 32a may comprise additional components and circuitry not shown in Figs. 2B and 4A. According to some examples, first power connector 32b and second power connector 32a are waterproof. According to some examples, first power connector 32b is a female type connector, as illustrated at Fig. 4A. According to some examples, first power connector 32b is a male type connector (not shown).
  • power source housing 14 is detachably attached to main body 12.
  • power source housing opening 15 is configured to interact with or to be attached to a main body opening 12a.
  • power source housing opening 15 is configured to enter to main body opening 12a.
  • power source housing 14 is detachably attached to main body 12 by various releasable mechanisms such as but not limited to, snap-fit fastener, bayonet mount, latch, or any structural mechanism similar thereto. Each possibility represents a separate example of the present disclosure.
  • the snap-fit fastener is selected from an annular snap-fit, a torsional snap fit, a cantilever snap-fit, a U-shaped cantilever snap-fit, an L- shaped cantilever snap-fit, or any structural mechanism similar thereto.
  • the snap- fit fastener is a cantilever snap-fit.
  • power source housing 14 comprise at least one coupling arm 38.
  • power source housing 14 comprise at least two coupling arms 38.
  • at least two coupling arms 38 are located at opposite external surfaces of power source housing 14, extending in distal direction 80 towards power source housing opening 15.
  • at least two coupling arms 38 are integrally formed with power source housing 14.
  • at least two coupling arms 38 are connected to power source housing 14 by a hinge, a spring, or any other known flexible and/or elastic element known in the art.
  • main body 12 comprises at least one coupling recess 39.
  • main body 12 comprises at least two coupling recesses 39.
  • at least two coupling recesses 39 are located at opposite external surfaces of main body 12, in the vicinity of main body opening 12a.
  • at least two coupling recess 39 are integrally formed with main body 12.
  • At least two coupling arms 38 are configured to engage with at least two coupling recess 39.
  • the engagement of at least two coupling arms 38 with at least two coupling recess 39 form a releasable engagement mechanism.
  • the releasable engagement mechanism has a released position, shown in Fig. 2B, and a locked position, shown in Fig. 2A. In the released position, power source housing 14 and main body 12 are separated and the releasable engagement mechanism is not engaged. In the locked position, power source housing 14 is joined to main body 12 and the releasable engagement mechanism is engaged.
  • the releasable engagement mechanism comprises a snap-fit mechanism.
  • power source housing 14 is joined to main body 12 by positioning them along central longitudinal axis 70, such that each one of coupling arms 38 is aligned with each one of coupling recess 39.
  • Fig. 2B illustrates the proper alignment of at least two coupling arms 38 with at least two coupling recess 39.
  • power source housing 14 comprise a plurality of coupling arms 38 and main body 12 comprises a corresponding plurality of coupling recess 39.
  • power source housing 14 is joined to main body 12 by aligning the plurality of coupling arms 38 with the corresponding plurality of coupling recess 39.
  • the releasable engagement mechanism of coupling arms 38 with coupling recess 39 is configured to be repeatedly engaged and released without sacrificing the ability of the releasable engagement mechanism to securely join power source housing 14 to main body 12.
  • the releasable engagement mechanism of coupling arms 38 with coupling recess 39 is configured to be waterproof, thereby preventing the entry of water from the joined connection between power source housing 14 and main body 12.
  • power source housing 14 comprises at least two coupling recesses 39 and main body 12 comprises at least two coupling arms 38 (not shown), wherein the at least two coupling arms 38 are configured to engage with the at least two coupling recesses 39, thereby attaching power source housing 14 to main body 12. It is to be understood that the engagement of at least two coupling arms 38 with at least two coupling recesses 39 form the releasable engagement mechanism, regardless of the location of the coupling arms 38 and the respective coupling recesses 29, is as described herein.
  • the releasable engagement mechanism of coupling arms 38 with coupling recess 39 can be easily and swiftly engaged and/or released, in order to permit easy and rapid disassembly of power source housing 14 from main body 12. Such an easy and rapid disassemble and engagement capabilities are highly useful during surfing away from shore. It is to be understood that the releasable engagement mechanism as presented herein does not utilize any additional separate fastening means, such as bolts or screws, or a threaded configuration such as threading power source housing 14 into main body 12, which might consume a significantly longer time to perform a power source housing 14 replacement procedure.
  • the lack of additional separate complex fastening means or a threaded configuration contributes for the easy and rapid disassemble and engagement of power source housing 14 from main body 12 during surfing away from shore.
  • the user can carry (for example, using a pouch or a bag) at least one additional power source housing 14 containing a fully charged at least one power source 30. If the at least one power source 30 within the presently connected power source housing 14 is discharged or depleted during surfing, the user can easily release it from main body 12 utilizing the releasable engagement mechanism and replace it with a new power source housing 14 containing a fully charged at least one power source 30. Due to the simplicity of utilizing the releasable engagement mechanism as described herein above, the user can quickly resume surfing, without remaining stranded in water for prolonged durations in order to replace the power source using more complex fastening means or a time-consuming threaded configuration.
  • the sealing means or members within the scope of the present disclosure are waterproof, the rapid disassembly and engagement of power source housing 14 from and to main body 12 in the environment of water or underwater, cannot harm or damage the inner electric components of power source housing 14 and main body 12.
  • the releasable engagement mechanism is waterproof, thereby enabling the detachable attachment of power source housing 14 from main body 12 in the environment of water or underwater.
  • the safe and rapid disassembly and engagement of power source housing 14 from and to main body 12 in the environment of water or underwater allow the user to replace a depleted power source housing 14 while surfing and/or diving away from shore, thereby providing the user with a time and effort saving underwater power unit 10 and preventing the need to paddle back to shore in order to change the depleted power source.
  • main body 12 comprises motor 20 disposed within, coupled or couplable to propeller 22 via shaft 23.
  • shaft 23 extends from motor 20 in the distal direction 80 towards underwater power unit rear end 74.
  • motor 20 is configured to provide a thrusting force to drive or propel the underwater power unit 10 forward (in the direction opposite to the distal direction 80).
  • motor 20 is disposed within main body 12.
  • motor 20 is configured to generate a rotation of propeller 22 about the central longitudinal axis 70.
  • main body 12 further comprises a shaft circumferential cover 23a, encompassing at least a portion of shaft 23, as illustrated at Fig. 4B.
  • shaft circumferential cover 23a is configured to encompass and support at least a portion of shaft 23, and thereby to provide mechanical stability thereto.
  • shaft circumferential cover 23a is attached to main body 12, and extends in the distal direction 80 towards underwater power unit rear end 74.
  • shaft circumferential cover 23a is waterproof, and is further configured to seal main body 12, thereby preventing water from entering thereto.
  • motor 20 is supported within main body 12 by a plurality of struts, extending from an inner surface of main body 12 (not shown).
  • Motor 20 can be an electric motor.
  • motor 20 is selected from a permanent magnet DC (direct current) motor, a brushless motor, a brushed motor, a switched reluctance motor, a synchronous reluctance motor, an induction motor and a universal motor. Each possibility represents a separate example of the present disclosure.
  • motor 20 is a brushless DC electric motor.
  • at least one power source 30 is configured to provide power to motor 20 in order to rotate propeller 22, thereby to propel or drive underwater power unit 10 forward, in the direction opposite to the distal direction 80.
  • motor 20 is configured to impart rotational movement to propeller 22.
  • the voltage output of at least one power source 30 directly affect the continuous operation and the thrust force of motor 20.
  • motor 20, via propeller 22, is configured to propel or drive standard surfboard 2 and the user forward at a speed of about 1 to about 30 km/h.
  • motor 20 is configured to propel standard surfboard 2 and the user at a speed of about 1 to about 15 km/h.
  • motor 20 is configured to propel standard surfboard 2 and the user at a speed of about 1 to about 10 km/h.
  • motor 20 is configured to propel standard surfboard 2 and the user at a speed of about 1 to about 8 km/h.
  • motor 20 is configured to propel standard surfboard 2 and the user at a speed of at least about 5 km/h.
  • At least one power source 30 is configured to provide at least one hour of continuous operation of motor 20. According to further examples, at least one power source 30 is configured to provide at least two hours, at least three hours, at least four, at least five, or at least ten hours of continuous operation of motor 20. Each possibility represents a separate example of the present disclosure. According to further examples, at least one power source 30 is configured to provide at least two hours of continuous operation of motor 20.
  • motor 20 is configured to rotate propeller 22 at about 500 to about 50,000 rounds per minute (RPM). According to some examples, motor 20 is configured to rotate propeller 22 at about 1,000 to about 25,000 rounds per minute (RPM). According to some examples, motor 20 is configured to rotate propeller 22 at a variety of rotational speed ranges, depending on the requirements of the user during the different stages of surfing. According to some examples, motor 20 is configured to rotate propeller 22 at a high rotational speed for a short time duration, such as about 1-20 seconds, in order to assist the user to accelerate the surfboard in order to properly “catch a wave”, thereby providing the user with a “power boost” (i.e., high speed for a short time).
  • a “power boost” i.e., high speed for a short time
  • motor 20 is configured to rotate propeller 22 at a low rotational speed for a long-time duration, such as about 10 seconds to about 10 minutes, in order to assist the user to paddle out away from the shore against the flow direction of the waves.
  • the high rotational speed can refer to about 10,000 to about 25,000 RPM, while the low rotational speed can refer to about 1,000 to about 10,000 RPM.
  • main body 12 comprises upper main body adaptor platform 28, located at main body top surface 76.
  • upper main body adaptor platform 28 is integrally formed with main body 12.
  • upper main body adaptor platform 28 is configured to be detachably attached to adaptor unit 18.
  • upper main body adaptor platform 28 is configured to interact with, or to receive an adaptor coupling surface 18b of adaptor unit 18, as illustrated at Fig. 2B.
  • upper main body adaptor platform 28 comprises a female type elongated opening or slot, adapted to receive a male type adaptor coupling surface 18b, as shown in the exemplary example illustrated in Fig. 2B.
  • upper main body adaptor platform 28 comprises a vertical extension, extending upwards from main body top surface 76, wherein said vertical extension comprises a female type slot disposed therein, adapted to receive the male type adaptor coupling surface 18b, as shown in the exemplary example illustrated in Fig. 4B.
  • adaptor coupling surface 18b is configured to be secured to upper main body adaptor platform 28 utilizing attachment means, such as bolts, screws, set screws, nails, pins, latches, snap-fit fasteners, bayonet mounts, and other attachment means known in the art.
  • attachment means such as bolts, screws, set screws, nails, pins, latches, snap-fit fasteners, bayonet mounts, and other attachment means known in the art.
  • main body 12 comprises lower fin attachment section 27 located at main body bottom surface 78 and configured to be detachably attached to fin unit 16.
  • lower fin attachment section 27 comprises a standard slot, as described herein above.
  • said standard slot is integrally formed with main body 12.
  • the standard slot is configured to be detachably attached to a standard fin.
  • the standard slot is selected from FCS fin box, FCS II fin box, futures fin box, and other fin boxes known in the art. Each possibility represents a separate example.
  • lower fin attachment section 27 is configured to secure various standard fins types utilizing a compatibility adaptor or a fin adaptor.
  • main body 12 further comprises a control unit 40.
  • control unit 40 is in electrical and/or functional communication with at least one of power source 30 and motor 20.
  • control unit 40 comprises at least one processor 42 configured to send and receive data (such as, but not limited to, digitized signals, control data, etc.) to and from the various electronic components of underwater power unit 10.
  • At least one processor 42 can be selected from, but not limited to, a microprocessor, a microcontroller, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), a Programmable Logic Device (PLD), a controller, a state machine, gated logic, discrete hardware components, or any other suitable device or a combination of devices that can perform calculations or other manipulations of information.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • PLD Programmable Logic Device
  • controller a state machine, gated logic, discrete hardware components, or any other suitable device or a combination of devices that can perform calculations or other manipulations of information.
  • processor refers to a single chip device which includes a plurality of modules which may be collected onto a single chip in order to perform various computer-related functions.
  • control unit 40 further comprises at least one of an electronic speed control unit 44 (ESC) and a communication module 46.
  • control unit 40 further comprises an electronic speed control unit 44 (ESC) and a communication module 46, wherein each one is in functional communication with at least one processor 42.
  • processor 42, electronic speed control unit 44, and communication module 46 are mounted on at least one printed circuit board (PCB).
  • PCB printed circuit board
  • each one of processor 42, electronic speed control unit 44, and communication module 46 are mounted on the same PCB.
  • communication module 46 is embedded within processor 42.
  • electronic speed control and “ESC” are interchangeable, and refer to an electronic circuit that controls and regulates the speed of motor 20.
  • electronic speed control unit 44 is embedded within processor 42.
  • electronic speed control unit 44 is separate from processor 42.
  • communication module 46 comprises electronic communication systems and methods, including a wireless link.
  • Said wireless link can incorporate any suitable wireless connection technology known in the art, including but not limited to NFC, Wi-Fi (IEEE 802.11), Bluetooth, other radio frequencies, Infra-Red (IR), GSM, CDMA, GPRS, 3G, 4G, W-CDMA, EDGE or DCDMA200 and similar technologies.
  • IR Infra-Red
  • GSM Global System for Mobile Communications
  • CDMA Code Division Multiple Access
  • GPRS Code Division Multiple Access
  • 3G, 4G, W-CDMA, EDGE or DCDMA200 wireless communication module 46
  • communication module 46 further comprises a radio-frequency (RF) antenna.
  • RF radio-frequency
  • communication module 46 further comprises at least one of a transmitter module and/or a receiver module.
  • communication module 46 is configured to perform wireless communication utilizing Bluetooth.
  • control unit 40 is substantially aligned with motor 20 within main body 12, along the central longitudinal axis 70.
  • processor 42, communication module 46 and electronic speed control unit 44 are substantially aligned with motor 20 within main body 12, along the central longitudinal axis 70, as illustrated at Fig. 4B.
  • central longitudinal axis 70 extends through at least a portion of control unit 40 and at least a portion of motor 20.
  • central longitudinal axis 70 extends through at least a portion of processor 42, at least a portion of electronic speed control unit 44, at least a portion of communication module 46, and at least a portion of motor 20.
  • the alignment of processor 42, communication module 46, electronic speed control unit 44, and motor 20 along the central longitudinal axis 70 during the manufacturing of underwater power unit 10, enables lower fin attachment section 27 to comprise the standard slot which is able to be detachably attached to the standard fin.
  • main body 12 further comprises at least one waterproof control switch (not shown).
  • said control switch in the form of an on/off push button switch.
  • on/off push button switch or “push button switch” are interchangeable, and refers to a two-position, ‘on/off switch mechanism, wherein a first press of the push button switch actuates the switch from ‘off to ‘on’ and activates the various components of underwater power unit 10, while a second press of the push button switch turns the switch back ‘off and deactivates the various components thereof.
  • main body 12 further comprises at least one additional waterproof switch, wherein the press of said switch is configured to change the predetermined rotation speed within a predetermined rotation range.
  • the user can select or define the predetermined rotation speed and/or the predetermined rotation range prior to, or during, surfing.
  • main body 12 further comprises at least one waterproof visual indicator (not shown).
  • the visual indicator comprises a display screen.
  • the visual indicator comprises at least one LED lamp. The visual indicator can provide a visual indication for the activation or deactivation of underwater power unit 10, and optionally the rotational speed of propeller 22.
  • a remote device (not shown) is used to send wireless commands to communication module 46 through the wireless link.
  • communication module 46 is configured to transfer said commands to processor 42.
  • processor 42 is configured to receive the commands from communication module 46, and to control the activation of motor 20.
  • processor 42 is configured to receive the commands from communication module 46, and in response thereto activate or deactivate motor 20, and control the rotational speed of motor 20.
  • processor 42 is configured to receive the commands from communication module 46, and to communicate with the at least one power source 30, in order to control the supply of power to motor 20.
  • processor 42 is configured to receive the commands from communication module 46, and to communicate with electronic speed control unit 44, in order to control the activation of motor 20 and regulate the rotational speed of propeller 22.
  • electronic speed control unit 44 is configured to receive commands from processor 42 or from communication module 46, and to regulate the electric power transferred from at least one power source 30 to motor 20, in order to control the rotational speed of propeller 22.
  • processor 42 is further configured to receive signals from at least one of electronic speed control unit 44, motor 20, and at least one power source 30, and to transfer said signals to communication module 46.
  • communication module 46 is configured to transfer said signals to the remote device through the wireless link. Said signals can include at least one of the condition of motor 20, the condition of at least one power source 30, and the current rotational speed of propeller 22. The condition of at least one power source 30 can include the battery’s discharge status.
  • the communication between each one of processor 42, communication module 46 and electronic speed control unit 44 is performed by wired or wireless communication.
  • the communication between each one of processor 42, communication module 46, electronic speed control unit 44, motor 20, and at least one power source 30 is performed by wired or wireless communication.
  • the wired communication can be one or more wire traces on a PCB.
  • the term “remote device”, as used herein, refers to a device which supports wireless communication (utilizing a wireless link), that enable wireless communication with communication module 46 of underwater power unit 10.
  • the remote device is able to send wireless commands to, and optionally receive signals from, control unit 40 of underwater power unit 10.
  • the remote device can be selected from, but not limited to, a cell phone, a smartphone, a tablet, a smart-watch, a laptop, or a designated device.
  • An application can be installed on at least one of said smartphone, tablet, laptop, and smart-watch, in order to control the wireless communication with control unit 40 of underwater power unit 10.
  • the term “designated device”, as used herein, refers to a remote device that is manufactured specifically to control underwater power unit 10 as presented herein, and can be sold together with underwater power unit 10, or separately.
  • the designated device comprises at least one of a button, a touch screen and/or a display screen. Each possibility represents a separate example.
  • the designated device comprises a plurality of buttons.
  • the designated device is fastened to the body of the user utilizing various wrapping means.
  • wrapped means refers to any elongated flexible structure known in the art, capable of being wrapped and unwrapped around any limb or portion of the body of a user, such as a strap, a band, a belt, a cord, a cable, a pouch, a chain and the like.
  • the designated device can be worn on the wrist of the user, similar to a watch.
  • the designated device can be worn on the neck of the user, similar to a neckless.
  • the designated device can be worn on the waist of the user, similar to a pouch.
  • second power connector 32a is a male type connector, as illustrated at Fig. 4B. According to some examples, second power connector 32a is a female type connector (not shown).
  • rear unit 21 comprises a protective cowling 24, extending from main body 12 in the distal direction 80 towards underwater power unit rear end 74.
  • rear unit 21 encompasses or encircles propeller 22 and at least a portion of shaft 23.
  • rear unit 21 further comprises a rear barrier 25, attached to protective cowling 24 at underwater power unit rear end 74.
  • shaft 23 extends from motor 20 in the distal direction 80 towards rear barrier 25.
  • shaft 23 extends from a first shaft end in the distal direction 80 towards a second shaft end (not shown).
  • the second shaft end is in contact with rear barrier 25.
  • protective cowling refers to a cage-like structure encompassing propeller 22.
  • protective cowling 24 and rear barrier 25 are configured to prevent accidental contact between propeller 22 and the user, thus maintaining the safety of the user, while allowing free flow of water therethrough and the proper functioning of propeller 22.
  • Protective cowling 24 and rear barrier 25 can be also configured to prevent accidental contact between propeller 22 and the external environment, such as but not limited to, fish and optionally sand.
  • protective cowling 24 is waterproof sealed to main body 12, thereby preventing water from entering into the interior of main body 12.
  • rear barrier 25 can include an outer ring having a diameter that closely matches the diameter of the rear end of protective cowling 24, and a plurality of ribs extending radially therefrom towards an inner ring, wherein the inner ring is configured to accept a second shaft end there-through,
  • rear unit 21 further comprises at least one bearing 92.
  • at least one bearing 92 is disposed between the second shaft end of shaft 23 and rear barrier 25.
  • at least one bearing 92 is configured to connect the second shaft end of shaft 23 to rear barrier 25 while maintaining/supporting the rotational movement of shaft 23.
  • at least one bearing 92 comprises a rolling bearing selected from ball bearing and roller bearing.
  • the roller bearing can be selected from, but not limited to, cylindrical roller, spherical roller, gear bearing, tapered roller, needle roller, and CARB toroidal roller bearing. Each possibility represents a separate example of the present disclosure.
  • at least one bearing 92 comprises a journal bearing.
  • propeller 22 comprises at least one blade. According to some examples, propeller 22 comprises a plurality of blades. According to some examples, propeller 22 comprises at least 2 blades, at least 3 blades, at least 4 blades, at least 5 blades, or at least 6 blades. Each possibility represents a separate example.
  • Propeller 22 can be selected from a fixed-pitch propeller (FPP), a controllable-pitch propeller (CPP), or other known propellers in the art.
  • propeller 22 comprises various blade configurations, as illustrated at Fig 4C. According to some examples, propeller 22 comprises various blade dimensions and shapes.
  • propeller 22 comprises propeller 22a provided with a plurality of blades, such as the illustrated four blades.
  • propeller 22 comprises propeller 22b having helical-blades formed in a tapering configuration (such as for example, a Lily impeller).
  • propeller 22 comprises propeller 22c having helical or diagonal blades formed in a non-tapering configuration.
  • the various blade shapes and/or dimensions of propeller 22 affect the underwater power unit 10 hydrodynamic characteristics, thrust abilities, and user stability.
  • the underwater power unit 10 may be provided as a kit with a plurality of propellers 22, wherein each one comprises a different blade shape and/or dimensions.
  • the underwater power unit 10 may be provided as a kit with a plurality of protective cowlings 24 and a corresponding plurality of rear barriers 25, each one is characterized by having different dimensions, as illustrated at Fig. 4C.
  • the dimensions of each one of the plurality of protective cowlings 24 and corresponding plurality of rear barriers 25 correspond to the dimensions of each one of the plurality of propellers 22.
  • rear unit 21 is detachably attached to main body 12.
  • protective cowling 24 is detachably attached to main body 12.
  • rear barrier 25 is detachably attached to protective cowling 24.
  • propeller 22 is detachably attached to shaft 23.
  • protective cowling 24 is configured to be detachably attached to main body 12 utilizing attachment means such as bolts, screws, set screws, nails, pins, latches, snap-fit fasteners, bayonet mounts, and other attachment means known in the art. Each possibility represents a separate example. According to some examples, protective cowling 24 is configured to threadedly engage with main body 12 utilizing a threaded configuration (examples not shown).
  • rear barrier 25 is configured to be detachably attached to protective cowling 24 utilizing attachment means such as bolts, screws, set screws, nails, pins, latches, snap-fit fasteners, bayonet mounts, and other attachment means known in the art. Each possibility represents a separate example.
  • rear barrier 25 is configured to threadedly engage with protective cowling 24 utilizing a threaded configuration (examples not shown).
  • protective cowling 24 comprises at least one protective cowling coupling bore 94b and rear barrier 25 comprises at least one rear barrier coupling portion 94a.
  • At least one rear barrier coupling portion 94a is configured to be attached to at least one protective cowling coupling bore 94b via at least one of a rear barrier coupling means 94.
  • a plurality of protective cowling coupling bores 94b is configured to be attached to a corresponding plurality of rear barrier coupling portions 94a, by a corresponding plurality of rear barrier coupling means 94.
  • rear barrier coupling means 94 are selected from screws, bolts, nails, pins, and other known coupling means known in the art. Each possibility represents a separate example of the present disclosure.
  • protective cowling 24 is configured to be detachably attached to main body 12 utilizing screws.
  • rear barrier 25 is configured to be detachably attached to protective cowling 24 utilizing screws.
  • a method for replacing propeller 22 attached to power unit 10 with an alternative propeller wherein said alternative propeller is characterized by having a different blade configuration/ shape but the same external dimensions as propeller 22, the method comprising the steps of a) detaching rear barrier 25 from protective cowling 24; b) releasing propeller 22 from shaft 23; c) attaching the alternative propeller to shaft 23; and d) reattaching rear barrier 25 to protective cowling 24.
  • step (a) is performed by unfastening the screws connecting rear barrier 25 to protective cowling 24.
  • step (d) is performed by refastening the screws connecting rear barrier 25 to protective cowling 24.
  • a method for replacing propeller 22 attached to underwater power unit 10 with an alternative propeller wherein said alternative propeller is characterized by having different dimensions and optionally a different blade configuration/ shape than those of propeller 22, utilizing an alternative cowling having different dimensions than those of protective cowling 24 (corresponding to the dimensions of the alternative propeller), the method comprising the steps of a) detaching rear barrier 25 from protective cowling 24; b) releasing propeller 22 from shaft 23; c) detaching protective cowling 24 from main body 12; d) attaching an alternative cowling to main body 12; e) attaching an alternative propeller to shaft 23, wherein the dimensions of said alternative propeller correspond to the dimension of the alternative cowling; and f) reattaching rear barrier 25 to the alternative cowling.
  • step (a) is performed by unfastening the screws connecting rear barrier 25 to protective cowling 24.
  • step (c) is performed by unfastening the screws connecting protective cowling 24 to main body 12.
  • step (d) is performed by fastening the screws connecting the alternative cowling to main body 12.
  • step (f) is performed by refastening the screws connecting rear barrier 25 to the alternative cowling.
  • step (f) comprise attaching an alternative rear barrier to the alternative cowling, wherein the dimensions of the rear barrier correspond to the dimensions of the alternative cowling.
  • step (f) comprise refastening the screws connecting the alternative rear barrier to the alternative cowling.
  • the present disclosure provides a simple method for rapidly exchanging propeller 22 with an alternative propeller 22, optionally having a different blade configuration/shape and/or dimensions, therefore affecting the underwater power unit 10 hydrodynamic characteristics and abilities. Moreover, by adjusting the different blade configuration/shape and/or dimensions of propeller 22, the underwater power unit 10 can be customized according to various users’ demands.
  • adaptor unit 18 is configured to enable detachable attachment of the underwater power unit 10 to the standard surfboard 2.
  • adaptor unit 18 is configured to enable detachable attachment of the underwater power unit 10 to the user.
  • adaptor unit 18 is configured to provide support to the user, during the operation of underwater power unit 10.
  • the present disclosure provides a modular underwater power unit 10 which can be adapted to transform a standard surfboard 2 into a motorized surfboard 1 or can be utilized for diving and/or swimming applications.
  • adaptor unit 18 comprises adaptor coupling surface 18b configured to interact with, or to penetrate upper main body adaptor platform 28.
  • coupling surface 18b is configured to be detachably attached to upper main body adaptor platform 28. The adaptor coupling surface 18b can be secured to upper main body adaptor platform 28 as described herein above.
  • adaptor unit 18 further comprise a board coupling portion, configured to be secured to the standard slot of the standard surfboard 2.
  • said board coupling portion of adaptor unit 18 comprises various male type tabs configured to interact with a female type receiving slot of the standard surfboard 2.
  • the board coupling portion of adaptor unit 18 comprises FCS tabs 18a, configured to be secured to an FCS fin box of the standard surfboard 2, utilizing set screws.
  • the board coupling portion of adaptor unit 18 comprises FCS II tabs 18d, configured to be secured to an FCS II fin box of the standard surfboard 2.
  • the board coupling portion of adaptor unit 18 comprises futures single tab 18e or 18c, configured to be secured to a futures fin box of the standard surfboard 2.
  • the board coupling portion of adaptor unit 18 comprises softboard tabs 18f including plugs, configured to be secured to a softboard fin box of the standard surfboard 2.
  • the present disclosure provides a plurality of adaptor units 18, each comprising a different board coupling portion configured to be secured to different types of fix boxes, without any need for structural modifications to said fix boxes, thereby enabling attachment of underwater power unit 10 to different types of fin boxes corresponding to various types of standard surfboards 2. While optional attachment of the underwater power unit 10 to a surfboard 2 via various optional types of adapter units 18 is described and illustrated, it will be clear that other types of adapter units 18 may be utilized to attach the underwater power unit 10 to other watercrafts, such as kayaks, canoes, paddle boards, life rafts, sail boards, inflatable watercrafts and the like.
  • adaptor unit 18 further comprise a user interaction portion, configured to be held by, or be secured to, the user, thereby connecting underwater power unit 10 directly to the user for various applications such as diving, swimming, and providing assistance during surfing.
  • the user interaction portion of adaptor unit 18 comprises a double handle 18g, configured to be held by the user by both hands.
  • the user interaction portion of adaptor unit 18 comprises a single handle 18h, configured to be held by the user by at least one hand.
  • the user interaction portion of adaptor unit 18 comprises a double handle configuration comprising two single handles 18h (not shown), aligned in parallel or in line with each other, and configured to be held by the user by both hands.
  • the user interaction portion of adaptor unit 18 comprises an elastic strap 18i, configured to be secured directly to a limb or any portion of the body of the user.
  • the elastic strap 18i is configured to be wrapped around the user’s hand and/or wrist, as illustrated by Fig. 4F.
  • the elastic strap 18i is configured to be wrapped around the user’s chest, waist, or leg(s) (not shown).
  • the elastic strap 18i comprises a foot strap 18j , which is configured to be wrapped around the user’s ankle and/or foot, as illustrated by Fig. 4E.
  • the present disclosure provides a plurality of adaptor units 18, each comprising a different user interaction portion configured to be held by, or be secured to, the user, without any need for significant structural modifications to the underwater power unit 10, thereby utilize underwater power unit 10 for various applications such as diving, swimming, and providing assistance during surfing.
  • an adaptor unit 18 comprising a board coupling portion in order to attach underwater power unit 10 to standard surfboards 2, thus enabling excessive assistance during surfing
  • an experienced user will require an adaptor unit 18 comprising a user interaction portion in order to attach underwater power unit 10 to the user’s limb (e.g., a leg or a hand), thus enabling assistance during paddling that will not affect the hydrodynamic movement of the standard surfboards 2.
  • lower fin attachment section 27 comprises a standard slot configured to interact with or be attached to, fin unit 16, as disclosed herein above.
  • fin unit 16 comprises a standard fin.
  • fin unit 16 is an FCS fin 16a.
  • fin unit 16 is an FCS II fin 16d.
  • fin unit 16 is a futures fin 16c or 16e.
  • fin unit 16 is a longboard fin 16f.
  • longboard fin 16f comprise winglets (finlets), as illustrated at Fig. 4G.
  • fin unit 16 extends perpendicularly downward from main body bottom surface 78 of main body 12 and is integrally formed therewith, as illustrated at Fig. 2B. According to further examples, fin unit 16 is a standard fin.
  • Fig. 5 illustrates various fin characteristics of a standard fin, according to some examples.
  • standard fins have different dimensions and shapes.
  • the standard fins can have different rakes as illustrated by rake arrow 68, different base lengths as illustrated by base length arrow 64, and different heights as illustrated by height arrow 66.
  • the standard fins can be made from different materials affecting the rigidness or flexibility attributes of the fins.
  • rigid fins are more stable and provide a solid platform for riding large waves, while soft and flexible fins are good for making fast or sharp turns but are more difficult to control compared to the rigid fins.
  • rake and “sweep”, as used herein, are interchangeable, and refer to backwards arc’s degree of a front edge of the standard fin. Rake or sweep angle is a measurement that determines how far back the fin curves in relation to its base.
  • base length refers to base length of the standard fin in the widest point thereof, that is flush with the main body 12 once attached thereto.
  • height refers to the height or depth of the standard fin, and is typically measured from the base of the fin to the tallest/ sharpest point of the fin (the tip).
  • the present disclosure provides a specialized flexible fin (not shown) configured to perform a repetitive movement, during the operation of underwater power unit 110, which is similar to the repetitive movement which fins of fish perform during swimming, thereby enhancing the hydrodynamic capabilities of underwater power unit 110 during operation.
  • at least a portion of the specialized flexible fin is configured to perform the repetitive movement as presented herein, wherein said portion extends from the specialized flexible fin’s base to the specialized flexible fin’s tip.
  • the specialized flexible fin is shaped similarly to a standard fin, such as but not limited to, an FCS fin, an FCS II fin, a futures fin, and other fins known in the art. Each possibility represents a separate example.
  • the specialized flexible fin comprises at least one elastic polymeric material.
  • the underwater power unit 10, as disclosed herein, can be adapted to secure various standard fin types as described herein above, suitable for various users and uses, and therefore contribute to the cost effectiveness and/or manufacturing simplicity of underwater power unit 10.
  • previously disclosed motorized surfboards or motorized fins are manufactured integrally with a specific fin having predetermined dimensions and shapes. In order to change the fin, the user is required to change the entire motorized device (e.g., motorized fin or surfboard), resulting in a potentially highly expensive purchase of several motorized devices.
  • the underwater power unit 10 as disclosed herein is modularly connectable to and compatible with various types of standard fins, such as but not limited to, FCS fins, FCS II fins, futures fins, softboard fins, other fins known in the art, or the specialized flexible fin as presented herein, so that the user is required to purchase only a single underwater power unit 10 which is compatible with various types of fins, thus providing a simple, versatile and economic solution for motorized surfing.
  • standard fins such as but not limited to, FCS fins, FCS II fins, futures fins, softboard fins, other fins known in the art, or the specialized flexible fin as presented herein
  • Figs. 7-8 constitute a view in perspective and a side view, respectively, of underwater power unit 110, according to some examples.
  • Fig. 9 constitutes a rear-view of the underwater power unit 110, taken on line 9-9 of Fig. 8.
  • Fig. 10 constitutes a bottom-view of underwater power unit 110, taken on line 10-10 of Fig. 8.
  • Fig. 11 constitutes a top-view of underwater power unit 110, taken on line 11-11 of Fig. 8.
  • Fig. 12 constitutes a cross-sectional view of underwater power unit 110, according to some examples.
  • Fig. 13 constitutes an exploded view in perspective of underwater power unit 110, according to some examples.
  • Fig. 14 constitutes a view in perspective of fin unit 116, according to some examples.
  • underwater power unit 110 is similar to underwater power unit 10 as described and illustrated herein above, except that the control unit 140 of underwater power unit 110 is located in a respective position radially offset from the central longitudinal axis 70, and main body 112 further comprises a control unit housing 26 located in a respective position radially offset from the central longitudinal axis 70 and extending perpendicularly downward from main body bottom surface 178, wherein the control unit 140 is disposed within control unit housing 26, as illustrated at Figs. 12 and 13.
  • control unit housing 26 is integrally formed with main body 112.
  • underwater power unit 110 comprises: power source housing 14 comprising at least one power source 30 disposed within as presented herein above.
  • underwater power unit 110 further comprises: a main body 112 comprising: an upper main body adaptor platform 128 configured to be detachably attached to the adaptor unit 18 as presented herein above; a lower fin attachment section 127 configured to be detachably attached to a fin unit 116; the control unit 140 disposed within control unit housing 26; and a motor 120 disposed within main body 112, wherein said motor 120 is configured to be coupled to propeller 22 via shaft 23 as presented herein above.
  • underwater power unit 110 further comprises: rear unit 21 at least partially encompassing said propeller 22 and a portion of said shaft 23, as presented herein above.
  • control unit 140 comprises at least one of processor 142, communication module 146 and electronic speed control unit 144.
  • processor 142, communication module 146 and electronic speed control unit 144 are located at radially offset positions from at least one of the central longitudinal axis 70 and/or motor 120, as illustrated at Figs. 12 and 13.
  • control unit 140 of underwater power unit 110 comprising processor 142, communication module 146 and electronic speed control unit 144 is similar to control unit 40 of underwater power unit 10 comprising processor 42, communication module 46 and electronic speed control unit 44, respectively.
  • motor 120 and second power connector 132a of underwater power unit 110 are similar to motor 20 and second power connector 32a of underwater power unit 10, respectively.
  • processor 142, communication module 146 and electronic speed control unit 144 are disposed within control unit housing 26.
  • control unit 140 is in direct contact with control unit housing 26.
  • processor 142, communication module 146 and electronic speed control unit 144 are in direct contact with control unit housing 26.
  • control unit 140 is not aligned with the electric components disposed within main body 112 along the central longitudinal axis 70. Since the control unit 40 can be located radially offset from the central longitudinal axis 70 within control unit housing 26, and is not aligned with the electric components disposed within main body 112, the length of main body 112 along the central longitudinal axis 70 can be shortened compared to the length of main body 12. Advantageously, shortening the length of main body 112 along the central longitudinal axis 70 can improve the hydrodynamic behavior of underwater power unit 110, thus providing the user with increased control and stability over the surfboard.
  • main body 112 by shortening the length of main body 112, the hydrodynamic friction between the surrounding water and underwater power unit 110 during the operation thereof will lessen, thereby improving the hydrodynamic performances of underwater power unit 110, such as for example, improving the performances of motor 120 resulting in a slower discharge rate of power source 30.
  • the center of mass (i.e., balance point) of underwater power unit 110 located along central longitudinal axis 70 can shift closer in parallel to the center of upper main body adaptor platform 128.
  • body adaptor platform 128 is configured to enable the attachment of underwater power unit 110 to the standard surfboard 2 via the adaptor unit 18, shifting the balance point of underwater power unit 110 closer to the center of upper main body adaptor platform 128 enables forming a shorter pathway between the standard surfboard 2 and the balance point of underwater power unit 110.
  • Such a shorter pathway enables a stronger connection between the standard surfboard 2 and underwater power unit 110 during the operation thereof, and reduces the risk of disengagement/separation therebetween. It is further contemplated that as the balance point of underwater power unit 110 is further distanced from the attachment point to standard surfboard 2 (via adaptor unit 18), a higher force is applied on said attachment point during the operation thereof, which can result in the disengagement of underwater power unit 110 therefrom.
  • shortening the length of main body 112 along the central longitudinal axis 70 as disclosed herein can enable a stronger attachment between the standard surfboard 2 and underwater power unit 110.
  • fin unit 116 comprises at least two walls, wherein each wall exhibits an outer surface 118 and an inner surface 54 opposing the outer surface 118, wherein the inner surfaces 54 of the at least two walls define a hollow fin space 155 therebetween.
  • the inner surfaces 54 are configured to interact with or to encompass control unit housing 26.
  • control unit housing 26 is shaped to fit into the hollow fin space 155.
  • the inner surfaces 54 encompasses control unit housing 26.
  • the hollow fin space 155 enables the inner surfaces 54 to encompasses and optionally contact the control unit housing 26 of main body 112, when attached thereto.
  • the base of fin unit 116 is configured to be in line with main body 112, when attached thereto.
  • main body 112 comprises lower fin attachment section 127 located at an external surface of control unit housing 26 and configured to detachably attach fin unit 116 to main body 112.
  • fin unit 116 is configured to be secured or attached to lower fin attachment section 127 utilizing attachment means such as bolts, screws, set screws, nails, pins, latches, snap-fit fasteners, bayonet mounts, and other attachment means known in the art. Each possibility represents a separate example.
  • lower fin attachment section 127 comprises at least one threaded bore, or preferably at least two threaded bores. During the attachment of fin unit 116 to main body 112, at least one threaded screw can be used to secure fin unit 116 to lower fin attachment section 127.
  • fin unit 116 is configured to provide underwater power unit 10 with improved hydrodynamic behavior, similar to that provided by the standard fin.
  • the present disclosure provides a plurality of fin units 116, wherein each one is characterized by having different external dimensions and shapes.
  • the plurality of fin units 116 is manufactured to have different rakes, different base lengths, and different heights.
  • the plurality of fin units 116 comprises various materials, affecting the rigidness or flexibility attributes of each fin unit 116.
  • fin unit 116 comprise a rear flexible portion 117, as illustrated at Fig. 14.
  • the rear flexible portion 117 of fin unit 116 is configured to perform a repetitive movement, during the operation of underwater power unit 110, which is similar to the repetitive movement which fins of fish perform during swimming, thereby enhancing the hydrodynamic capabilities of underwater power unit 110 during operation.
  • the variety of fin units 116 as presented herein can be suitable to a variety of users having different weights, a variety of wave types (such as small and large waves) or a variety of standard surfboards 2 (such as shortboard or longboard).
  • previously disclosed motorized surfboards or motorized fins in the art are manufactured integrally with a specific fin having predetermined external dimensions and shape.
  • the user is required to change the entire motorized device (e.g., motorized fin or surfboard), resulting in an optional highly expensive purchase of several motorized devices.
  • the underwater power unit 10 as disclosed herein is modularly connectable to and compatible with various types of fin units 116, so that the user is required to purchase a single underwater power unit 110 with optionally several types of fin units 116. Since the effective cost of a plurality of fin units 116 is significantly lower than the cost of a complete underwater power unit 110, due to lack of moving electric components, the present disclosure provides a simple, versatile and economic solution for motorized surfing. [00161]
  • the control unit 140 generates excessive heat during the operation of underwater power unit 110. In order to prevent control unit 140 from overheating, heat or thermal energy needs to be transferred from control unit housing 26 to the surrounding environment of underwater power unit 110.
  • the surrounding environment of underwater power unit 110 can be air, or preferably water.
  • control unit housing 26 comprises at least one thermally conductive material, selected from a metal, a metal alloy, a conductive polymer, and combinations thereof. According to some examples, at least a portion of an external surface of the control unit housing 26 comprises the at least one thermally conductive material.
  • the metal can be aluminum.
  • fin unit 116 further comprises at least one heat expel element 58.
  • fin unit 116 comprises at least two heat expel elements 58, wherein each one is located on each one of the outer surfaces 118 of fin unit 116, as illustrated at Fig 10.
  • fin unit 116 comprises a plurality of heat expel elements 58, as illustrated at Fig.13.
  • At least one heat expel element 58 is a heat expel opening comprising at least one opening extending through at least one wall of the fin unit 116, such as through the inner surface 54 towards the outer surface 118.
  • heat expel opening is configured to allow direct contact between control unit housing 26 and the surrounding environment. By allowing direct contact between control unit housing 26 and the surrounding environment to occur, heat can transfer from control unit housing 26 to the water surrounding it, resulting in the cooling of control unit housing 26 and the electric components disposed within.
  • the heat expel opening is in the shape of an elongated opening.
  • heat expel opening comprises a plurality of openings.
  • At least one heat expel element 58 comprise a heat expel conducting surface.
  • the heat expel conducting surface comprises a highly conductive thermal material.
  • the highly conductive thermal material can comprise a metal, metal alloy, a conductive polymer, and combinations thereof.
  • the heat expel conducting surface is in direct contact with control unit housing 26. By allowing direct contact between control unit housing 26 and the heat expel conducting surface, heat can transfer from control unit housing 26 to the water surrounding it through the heat expel conducting surface, resulting in the cooling of control unit housing 26 and the electric components disposed within.
  • the heat expel conducting surface is flush with the outer surface 118 of fin unit 16, as illustrated at Fig. 13. According to some examples, the heat expel conducting surface is extending away from the outer surface 118 of fin unit 16 (not shown). The heat expel conducting surface can extend away from the outer surface 118 of fin unit 16 in order to increase the surface area of the heat expel conducting surface, and therefore to enhance the heat transfer from control unit housing 26 to the surrounding environment. According to some examples, the heat expel conducting surface comprises a plurality of heat expel conducting surfaces, wherein each one is extending away from the outer surface 118 of fin unit 16. According to further examples, the plurality of heat expel conducting surfaces is a heat sink.
  • heat sink refers to a passive heat exchanger that transfers thermal energy generated within control unit housing 26 to an external environment (typically the water surrounding the passive heat exchanger) where it is dissipated away from the passive heat exchanger, thereby allowing the electric components disposed within control unit housing 26 to cool.
  • the heat sink is typically made from a highly conductive thermal material, and is designed to maximize the its surface area in contact with the external environment surrounding it.
  • at least one heat expel element 58 comprises at least one heat sink, configured to transfer thermal energy from control unit housing 26 to the surrounding environment, thereby to cool control unit 40.
  • the at least one heat expel element 58 comprises a heat expel opening 58a, a first heat expel conducting surface 58b and a second heat expel conducting surface 58c, located at each one of at least two outer surfaces 118 of fin unit 116, as illustrated at Fig. 13.
  • the first heat expel conducting surface 58b and the second heat expel conducting surface 58c are in direct contact with the thermally conductive portions of the external surface of the control unit housing 26, thereby allowing heat transfer directly therethrough to the surrounding environment and cooling control unit housing 26.
  • heat expel opening 58a comprises a heat transferring tube extending through both outer surfaces 118 and in contact with the bottom edge of the control unit housing 26.
  • the heat transferring tube is configured to allow the access of water therein, enabling heat transfer from the bottom end of control unit housing 26 to the water passing therethrough, and discharge heated water to the surrounding environment, thereby cooling not only the sidewalls of the control unit housing 26 via heat expel conducting surfaces such as the first heat expel conducting surface 58b and the second heat expel conducting surface 58c, but rather also from the bottom end of the control unit housing 26.
  • the heat transferring tube is a tubular member having a circular, oval or elliptic cross-section.
  • the heat transferring tube comprises a thermal conducting material, as presented herein above.
  • underwater power unit 110 provides a specific configuration of underwater power unit 10, wherein the control unit 140 is located radially offset from the central longitudinal axis 70, and is disposed within the control unit housing 26. Therefore, control unit housing 26 can come into direct contact with the at least one heat expel element 58 disposed on each one of the two outer surfaces 118 of fin unit 116, thereby directly or indirectly releasing the heat generated within control unit housing 26 into the surrounding environment therethrough.
  • this configuration allows enhanced heat expel capabilities and prevents from the control unit 140 to overheat, resulting in improved performance of underwater power unit 110 during operation.
  • nose cap 34 is detachably attached to power source housing 14.
  • nose cap 34 comprises at least one coupling opening 36 configured to receive at least one coupling means 37a, wherein the at least one coupling means 37a is configured to enter or engage with at least one the coupling openings 36.
  • power source housing 14 comprise at least one coupling bore 37 configured to receive and engage with the at least one coupling means 37a.
  • at least one coupling means 37a is configured to detachably attach at least one coupling opening 36 of nose cap 34 to at least one coupling bore 37 of power source housing 14, thereby to detachably attach nose cap 34 to power source housing 14.
  • nose cap 34 comprise at least two coupling openings 36 configured to receive at least two coupling means 37a, wherein each one of coupling means 37a is configured to enter or engage with each one of the coupling openings 36.
  • power source housing 14 comprise at least two coupling bores 37, wherein each one is configured to receive and engage with each one of the at least two coupling means 37a.
  • at least two coupling means 37a are configured to detachably attach at least two coupling openings 36 of nose cap 34 to at least two coupling bores 37 of power source housing 14, thereby to detachably attach nose cap 34 to power source housing 14, as illustrated at Fig. 12.
  • coupling means 37a are selected from screws, bolts, nails, pins, and other connecting means known in the art. Each possibility represents a separate example of the present disclosure.
  • nose cap 34 comprise a plurality of coupling openings 36 configured to be detachably attached to a corresponding plurality of coupling bores 37 of power source housing 14, by a corresponding plurality of coupling means 37a.
  • At least one power source 30 can be easily inserted into and/or removed from power source housing 14 by the detachment of nose cap 34 therefrom as was presented herein above, without any structural modifications to power source housing 14.
  • the attachment of nose cap 34 to power source housing 14 is waterproof sealed, thereby preventing water from entering into the interior of power source housing 14.
  • the present disclosure provides a power source housing kit comprising a plurality of power source housings 14 configured to be detachably attached to main body 12 or main body 112, wherein each power source housing 14 comprises at least one power source 30 disposed within, wherein each at least one power source 30 is a rechargeable battery having a different voltage output, as presented herein above.
  • the present disclosure provides a propeller kit comprising a plurality of propellers 22 configured to be detachably attached to shaft 23, wherein each one comprises a different blade shape and/or dimensions, as presented herein above.
  • the present disclosure provides a rear unit kit comprising a plurality of protective cowlings 24 configured to be detachably attached to main body 12 or main body 112, and a corresponding plurality of rear barriers 25, each one is characterized by having different dimensions, wherein the dimensions of each one of the plurality of protective cowlings 24 and corresponding plurality of rear barriers 25 correspond to the dimensions of each one of the plurality of propellers 22, as presented herein above.
  • the present disclosure provides an adaptor unit kit comprising a plurality of adaptor units 18 configured be detachably attached to upper main body adaptor platform 28 or upper main body adaptor platform 128, each comprising a different board coupling portion configured to be secured to different types of fix boxes or a different user interaction portion configured to be held by, or be secured to, the user, as presented herein above.
  • the present disclosure provides a fin unit kit comprising a plurality of fin units 116 configured be detachably attached to lower fin attachment section 127, wherein each fin unit 116 is characterized by having different external dimensions and shapes, and optionally wherein each fin unit 116 comprises at least one heat expel element 58, as presented herein above.
  • the fin unit kit comprises at least one standard fin (such as FCS fins, FCS II fins, futures fins, or other standard fins known in the art) or the specialized flexible fin as presented herein.
  • the present disclosure provides a kit comprising: at least one underwater power unit 10; at least one of: the power source housing kit, the propeller kit, the rear unit kit, the adaptor unit kit, the fin unit kit, and combinations thereof; and optionally the designated device, as presented herein above.
  • the present disclosure provides a kit comprising: at least one underwater power unit 110; at least one of: the power source housing kit, the propeller kit, the rear unit kit, the adaptor unit kit, the fin unit kit, and combinations thereof; and optionally the designated device, as presented herein above.
  • Fig. 15 constitute a view in perspective of underwater power unit 210, according to some examples.
  • Fig. 16 constitute a cross-sectional view of underwater power unit 210, according to some examples.
  • Fig. 17 constitutes an exploded view in perspective of underwater power unit 210, according to some examples.
  • underwater power unit 210 is similar to underwater power unit 110, as described and illustrated herein above, except that underwater power unit 210 comprises a fin unit 216 comprising a power source housing 214 disposed therein.
  • underwater power unit 210 comprises a main body 212.
  • main body 212 comprises an upper main body adaptor platform 228 located at a main body top surface 276 and configured to be detachably attached to the adaptor unit 18, as disclosed herein above.
  • main body 212 further comprises a lower fin attachment section 227 located at a main body bottom surface 278 and configured to be detachably attached to a fin unit 216.
  • main body 212 further comprises a control unit 240 and a motor 220 disposed therein, wherein said motor 220 is configured to be coupled to a propeller 222 via a shaft 223.
  • at least one of upper main body adaptor platform 228 and fin attachment section 227 is substantially parallel to a central longitudinal axis 270 extending through main body 212.
  • motor 220 of underwater power unit 210 can be identical to motor 120 of underwater power unit 110 and/or motor 20 of unit 10, as disclosed herein above.
  • underwater power unit 210 further comprises a rear unit 221 encompassing said propeller 222 and a portion of said shaft 223.
  • shaft 223 extends from motor 220 in the distal direction 280, as illustrated at Fig. 15.
  • motor 220 is configured to be electronically coupled to at least one power source 230.
  • rear unit 221 is detachably attached to main body 212. It is to be understood that rear unit 221, propeller 222, and shaft 223 of underwater power unit 210 can be identical to rear unit 21, propeller 22, and shaft 23, respectively, of underwater power units 110 and/or 10, as disclosed herein above.
  • upper main body adaptor platform 228 is configured to interact with, or to receive an adaptor coupling surface 18b of the adaptor unit 18, as illustrated at Fig 17. It is to be understood that upper main body adaptor platform 228 of underwater power unit 210 can be identical to upper main body adaptor platform 128 of underwater power unit 110, as disclosed herein above.
  • control unit 240 comprises at least one of a processor 242, a communication module 246, and an electronic speed control unit 244 (i.e., ESC 244).
  • each one of processor 242, electronic speed control unit 244, and communication module 246 is mounted on the same PCB.
  • communication module 246 is embedded within processor 242.
  • processor 242, electronic speed control unit 244, and communication module 246 are separate components which are in electrical and/or functional communication with each other.
  • processor 242, communication module 246 and electronic speed control unit 244 are substantially aligned with motor 220 within main body 212, along the central longitudinal axis 270.
  • central longitudinal axis 270 extends through at least a portion of control unit 240 and at least a portion of motor 220.
  • central longitudinal axis 270 extends through at least a portion of processor 242, at least a portion of electronic speed control unit 244, at least a portion of communication module 246, and at least a portion of motor 220.
  • each one of processor 242, communication module 246 and electronic speed control unit 244 are located in parallel to the central longitudinal axis 270, within main body 212.
  • control unit 240 of underwater power unit 210 comprising processor 242, communication module 246 and electronic speed control unit 244, have the same functionality and/or is identical to control unit 140 of underwater power unit 110 comprising processor 142, communication module 146 and electronic speed control unit 144, as disclosed herein above.
  • the underwater power unit 210 comprises a fin unit 216 comprising the power source housing 214 disposed therein.
  • the power source housing 214 is not aligned with main body 212 along the central longitudinal axis 270, when the fin unit 216 is attached to the main body 212.
  • the power source housing 214 and the main body 212 does not intersect the central longitudinal axis 270.
  • main body 212 extends from an underwater power unit front end 272 towards the rear unit 221. Since the power source housing 214 is disposed within the fin unit 216, and is not located externally to the main body 212 along the central longitudinal axis 270, the entire length of the underwater power unit 210 along the central longitudinal axis 270 can be reduced, relative to the length of units 110 or 10, as disclosed herein above.
  • shortening the length of underwater power unit 210 by inserting the power source housing 214 within the fin unit 216, can improve the hydrodynamic behavior thereof, thus providing the user with increased control and stability over the surfboard, such as during fast or sharp turns over waves while surfing. It is contemplated that by shortening the length of unit 210, the hydrodynamic friction between the surrounding water and unit 210 during the operation thereof will lessen, thereby improving the hydrodynamic performances of underwater power unit 210.
  • the underwater power unit front end 272 of main body 212 and a front end 217 of the outer surfaces 218 of the walls of the fin unit 216 are aligned with each other, vertically to the central longitudinal axis 270.
  • main body 212 and fin unit 216 when main body 212 and fin unit 216 are attached, their front ends are flush and form a continuous outer surface, which causes the underwater power unit 210 to have a front end shaped as a fin (e.g., fin of a fish or a standard fin).
  • this flush alignment there are no portions of unit 210 located externally to the main body 212 along the central longitudinal axis 270.
  • this form of flush alignment can improve the hydrodynamic behavior of underwater power unit 210 by reducing the hydrodynamic friction between the surrounding water and unit 210 during the operation thereof, thereby improving the hydrodynamic performances of underwater power unit 210 and providing the user with increased control and stability over the surfboard. Furthermore, improving the hydrodynamic behavior of underwater power unit 210 may also improve and/or maximize the life and lifespan of the power source 230 (i.e., battery life).
  • fin unit 216 comprises at least two walls, wherein each wall exhibits an outer surface 218 and an inner surface 254 opposing the outer surface 218, wherein the inner surfaces 254 of the at least two walls define a hollow fin space 255 therebetween.
  • fin unit 216 further comprises a fin unit cover 219 configured to be detachably attached to the fin unit walls.
  • the at least two fin unit walls, and optionally the fin unit cover 219 define the hollow fin space 255 therebetween.
  • the power source housing 214 is disposed within the hollow fin space 255.
  • the power source housing 214 is in direct contact with the inner fin surfaces 254.
  • fin unit cover 219 comprises a cover protrusion 229 extending away therefrom in the direction of the main body 212.
  • fin unit 216 is configured to be detachably attached to the main body 212.
  • fin unit 216 is configured to be detachably attached to the lower fin attachment section 227 located at a main body bottom surface 278 of main body 212.
  • fin unit cover 219 is configured to be secured or attached to the lower fin attachment section 227 utilizing attachment means such as bolts, screws, set screws, nails, pins, latches, snap-fit fasteners, bayonet mounts, and other attachment means known in the art. Each possibility represents a separate example.
  • lower fin attachment section 227 comprises at least one threaded bore 241, or preferably at least two threaded bores 241. According to further such examples, during the attachment of fin unit 216 to main body 212, at least two threaded screws can be used to secure the cover protrusion 229 of fin unit cover 219 to the at least two threaded bores 241 of lower fin attachment section 227.
  • fin unit 216 comprises a first power connector 232b disposed therein, configured to be electronically coupled to a second power connector 232a, wherein the second power connector 232a is disposed within the main body 212.
  • first power connector 232b is configured to transfer electric power from at least one power source 230 to the second power connector 232a, during the attachment of fin unit 216 to main body 212.
  • to second power connector 232a is configured to transfer said electric power, directly or indirectly, to motor 220.
  • first power connector 232b and second power connector 232a are waterproof.
  • the first power connector 232b can be a male type connector while the second power connector 232a can be a female type connector, or vice versa.
  • the first and second power connectors 232b and 232a can be identical to the first and second power connectors 32b and 32a, as presented herein above.
  • power source housing 214 comprises at least one power source 230 disposed within, configured to be electronically connected, directly or indirectly, to motor 220 and to provide electric power thereto.
  • at least one power source 230 is rechargeable.
  • at least one power source 230 is a battery, such as for example, a lithium-ion polymer (Li-ion polymer) battery.
  • the power source housing 214 comprises a plurality of power sources 230 disposed therein, as can be seen for example, in Figs. 16 and 17.
  • the plurality of power sources 230 are aligned in a row.
  • the plurality of power sources 230 are aligned in parallel to each other, vertically to the central longitudinal axis 270.
  • the plurality of power sources can be a plurality of batteries.
  • the power source housing 214 is in a form of a battery holder, a battery socket, a battery connector, or a combination thereof, which comprises the plurality of power sources 230 disposed therein.
  • fin unit 216 comprises a power source controller 248 disposed therein, wherein said controller 248 is configured to transfer and/or regulate/balance electric power from the plurality of power sources 230 to the motor 220.
  • the controller 248 and/or the power source housing 214 comprising the plurality of power sources 230 can be in direct contact with the inner surfaces 254 of fin unit 216.
  • the plurality of power sources 230 can be in direct contact with the inner surfaces 254 of fin unit 216.
  • at least one of the controller 248, the power source housing 214, and the plurality of power sources 230 are in direct contact with the inner surfaces 254 of the fin unit 216.
  • the controller 248, the power source housing 214, and the plurality of power sources 230 are in direct contact with the inner surfaces 254 of the fin unit 216.
  • the power source controller 248 comprise a battery management system (BMS) which is configured to protect the plurality of power sources 230 during charging and discharging thereof.
  • BMS battery management system
  • the BMS can monitor the voltage of each one of the plurality of power sources 230 and balance electric distribution therebetween, to ensure the equal power charge thereof.
  • the BMS can monitor the voltage of the plurality of power sources 230 and the discharge current thereof. If the BMS determines that any of its limits have been passed, such as the plurality of power sources 230 draining too low, the BMS can deactivate each of the power sources 230, for the protection thereof.
  • the power source controller 248 can be, for example, a Li-ion 4S 12V BMS.
  • the power source controller 248 can perform at least one function, such as to prevent or balance over charge/discharge of the plurality of power sources 230; to regulate the electric current transferring from the plurality of power sources 230 to the motor 220; to regulate/control the temperature of the plurality of power sources 230 during charging and discharging thereof; to cool the plurality of power sources 230 during the utilization thereof, or a combination thereof.
  • the utilization of the power source controller 248 can provide a prolonged life cycle for each one of the plurality of power sources 230, and/or to enhance electric power transfer therefrom.
  • the power source controller 248 is in electrical and/or functional communication with the control unit 240 and/or the plurality of power sources 230.
  • the power source controller 248 and/or the plurality of power sources 230, disposed within fin unit 216, can generate excessive heat.
  • heat or thermal energy needs to be transferred from fin unit 216 to the surrounding environment of underwater power unit 210.
  • the surrounding environment of underwater power unit 210 can be air, or preferably water.
  • fin unit 216 comprises at least one thermally conductive material, selected from a metal, a metal alloy, a conductive polymer, and combinations thereof.
  • the metal can be aluminum.
  • at least a portion of each one of the at least two outer surfaces 218 of fin unit 216 comprises the at least one thermally conductive material.
  • fin unit 216 is made of a thermally conductive material, such as for example, aluminum.
  • fin unit 216 further comprises at least one heat expel element (e.g., heat expel element 58, as disclosed above).
  • fin unit 216 comprises at least two heat expel elements, wherein each one is located on each one of the outer surfaces 118 of fin unit 116 (not shown).
  • the controller 248, the power source housing 214, and the plurality of power sources 230 are in direct contact with the inner surfaces 254 of the thermally conductive fin unit 216, heat can easily transfer therefrom towards the surrounding environment of the underwater power unit 210.
  • this configuration of unit 210 comprising the controller 248 and the power source housing 214 comprising the plurality of power sources 230 disposed within the thermally conductive fin unit 216, can enable enhanced heat expel capabilities and prevent from the controller 248 and/or power sources 230 to overheat, resulting in improved performance of underwater power unit 210 during operation thereof.
  • fin unit 216 is configured to be detachably attached to the main body 212 and to provide underwater power unit 210 with improved hydrodynamic behavior, when attached to a standard surfboard (e.g., standard surfboard 2).
  • a standard surfboard e.g., standard surfboard 2
  • the present disclosure provides a variety of fin units 216 having different external dimensions, different shapes and geometries, and different numbers of pluralities of power sources 230 (i.e., batteries) disposed therein.
  • the variety of fin units 216 are manufactured to have different rakes, different base lengths (e.g., base length 264) and different heights (e.g., height 266), similar to those of fin units 116 as disclosed herein above.
  • the longest distance between the inner surfaces 254 of the at least two walls of fin unit 216 defines a base width 262, which is located in the vicinity of a lip (or end) of fin unit 216 and in the vicinity of the entrance to the hollow fin space 255 thereof (see Fig. 17).
  • the variety of fin units 216 can also be manufactured to have different lengths of base width 262.
  • the variety of fin units 216 can be suitable to a variety of users having different weights, a variety of wave types (such as small and large waves) or a variety of standard surfboards 2 (such as a shortboard or a SUP).
  • fin unit 216 may have certain external dimensions which are suitable for applications in which unit 210 is connected to a SUP, and comprise a number of batteries suitable for providing unit 210 with enough thrusting force to propel said SUP.
  • fin unit 216 may have smaller external dimensions (relative to the dimensions required for a SUP) which are suitable for applications in which unit 210 is connected to a shortboard, and comprise a smaller number of batteries (relative to the number of batteries required for propelling a SUP) suitable for providing unit 210 with enough thrusting force to propel said shortboard.
  • a ratio between the base width 262 and a height 266 of a fin unit 216 is above about 0.1.
  • the ratio between the base width 262 and the height 266 of the fin unit 216 i.e., width/height
  • the ratio between the base width 262 and the height 266 of the fin unit 216 is above about 0.4, or preferably above about 0.42.
  • the ratio between the base width 262 and the height 266 of the fin unit 216 is selected from the range of about 0.1-0.9.
  • the ratio between the base width 262 and the height 266 of the fin unit 216 is selected from the range of about 0.1-0.5. It is contemplated, according to some examples, that these ratios as presented herein between the base width 262 and the height 266 of the fin unit 216 can improve the hydrodynamic properties of underwater power unit 210, thus providing the user with increased control and stability over the surfboard.
  • Previously disclosed motorized surfboards or motorized fins in the art are manufactured integrally with a specific fin having predetermined external dimensions and shape.
  • the user is required to change the entire motorized device (e.g., motorized fin or surfboard), resulting in an optional highly expensive purchase of several motorized devices.
  • the main body 212 as disclosed herein is modularly connectable to and compatible with various types of fin units 216 having different geometries and dimensions, so that the user is required to purchase a single main body 212 with optionally several types of fin units 216, thereby forming a variety underwater power units 210 suitable to different users, surfboards, and uses. Since the effective cost of a plurality of fin units 216 is significantly lower than the cost of a complete underwater power unit 210, due to lack of moving electric components, the present disclosure provides a simple, versatile and economic solution for motorized surfing.
  • Figs. 18A - 18F illustrates various high-level views of an underwater motorized glide unit 300.
  • underwater motorized glide unit 300 comprises a plurality of fins 310, at least one thruster 320 and at least one motor (not shown for simplicity).
  • each fin 310 extends from a first end 311 to a second end 312 and from a first side 313 to a second side 314.
  • the at least one motor is implemented as a motor 20 described above.
  • each thruster 320 comprises a propeller 22.
  • propeller 22 of each thruster 320 is configured to be coupled to the motor via a shaft, as described above in relation to shaft 23.
  • each thruster 320 exhibits a respective longitudinal axis 321, the respective propeller 22 of the thruster 320 configured to rotate about the respective longitudinal axis 321.
  • each fin 310 and a respective thruster 320 define an underwater power unit 10, as described above.
  • each fin 310 and a respective thruster 320 define a unit 325.
  • unit 325 is in all respects similar to underwater power unit 10, 110 or 120, with the exception that upper main body adaptor platform 28 and adaptor unit 18 are replaced with a base connector 326, as illustrated in Figs. 18E - 18F.
  • Fig. 18E shows unit 325 from a first angle
  • Fig. 18F shows unit 325 from a second angle.
  • base connector 326 comprises a channel 327.
  • each thruster 320 is juxtaposed with the respective fin 310.
  • FIGs. 18A - 18F illustrate an example where each thruster 320 is positioned adjacent to first end 311 of the respective fin 310, however this is not meant to be limiting in any way.
  • one or more thrusters 320 are positioned adjacent to second end 312 of the respective fin 310.
  • one or more thrusters 320 are positioned between first end 311 and second end 312 of the respective fin 310.
  • FIGs. 18A - 18F illustrate an example where each fin 310 has a single thruster 320 associated therewith, this is not meant to be limiting in any way. According to some examples, more than thruster 320 is provided for each fin 310. Alternatively, more than one fin 310 is provided for each thruster 320. For example, a single thruster 320 canbe provided between two fins 310. Particularly, any number of thrusters 320 and any number of fins 310 can be provided, without exceeding the scope of the disclosure, as will further be described below.
  • motorized glide unit 300 comprises a base 330 configured to be positioned against the back of a diver, as will be further described below.
  • base 330 extends from a first end 331 to a second end 332 and from a first side 333 to a second side 334.
  • base 330 exhibits a central axis 335 extending therethrough.
  • each fin 310 exhibits a first wall 316 and a second wall 317 opposing first wall 316.
  • the inner surface of walls 316 and 317 define a hollow fin space 318 therebetween, as described above in relation to hollow fin space 155 and 255.
  • central axis 335 is generally parallel to longitudinal axis 321 of each thruster 320.
  • each fin 310 is secured to base 330.
  • base 330 comprises an attachment member 340.
  • attachment member 340 comprises a pair of extenders (not shown) that extend into the respective channels 327 of units 325.
  • each fin 310 extends from base 330 along a respective vector 350.
  • a pair of fins 310 are provided, with an angle between the vectors 350 of the pair of fins 310 being about 180 degrees.
  • base 330 defines a plane 360.
  • the pair of fins 310, and the vectors 350 thereof are generally parallel with plane 360.
  • longitudinal axis 321 of each thruster 320 is generally parallel to central axis 335 of base 330.
  • central axis 335 of base 330 is between longitudinal axis 321 of a first thruster 320 and longitudinal axis 321 of a second thruster 320.
  • a distance between longitudinal axis 321 of a first thruster 320 and central axis 335 of base 330 is substantially equal to a distance between longitudinal axis 321 of a second thruster 320 and central axis 335 of base 330, i.e., thrusters 320 are symmetrical about central axis 335 of base 330.
  • a third fin 310 is provided, with an angle between vector 350 of the third fin and vectors 350 of each of the pair of fins 310 being about 90 degrees (vectors 350 not shown for simplicity).
  • the three fins 310 form an up-tack shape, as illustrated in FIG. 19 A.
  • each fin 310 is provided, where an angle between vector 350 of each fin 310 and vector 350 of an adjacent one of the four fins 310 is about 90 degrees. According to some examples, the four fins 310 form a plus-sign shape. According to some examples, vector 350 of each of the four fins 310 exhibits an angle of about 45 degrees with plane 360 of base 330 (vectors 350 not shown for simplicity). According to some examples, the four fins 310 form an X shape in relation to plane 360, as illustrated in FIG. 19B.
  • two pairs of fins 310 are provided, on either side of central axis 335 of base 330, where for each pair of fins 310, first wall 316 of a first fin 310 faces second wall 317 of a second fin 310, as illustrated in FIG. 19C.
  • the direction of vector 350 of the first of each pair of fins 310 is generally equal to the direction of vector 350 of the second of each pair of fins 310 (vectors 350 not shown for simplicity).
  • a fifth fin 310 is provided, an angle between vector illustrated in FIG. 19D (vectors 350 not shown for simplicity).
  • each fin 310 can exhibit any of a variety of shapes.
  • each fin 310 can be shaped as illustrated in FIGs. 18A - 18F.
  • each fin 310 can be generally shaped as a rectangle, a trapezoid, an ellipse, a triangle or any other suitable shape.
  • vectors 350 of two fins 310 are in the same plane, while exhibiting an acute angle therebetween.
  • the two fins 310 can form a swept wing shape, or a delta wing shape.
  • a cross-section of each fin 310 can be shaped as: a symmetrical biconvex shape, where walls 316 and 317 are symmetrical; an asymmetrical biconvex shape, where walls 316 and 317 are asymmetrical; a flat bottom shape, where wall 316 is flat and wall 317 is curved; an under cambered shape; a reflex camber shape; a supercritical airfoil shape; or any other suitable shape.
  • each fin 310 can be shaped as the fin of any type of fish (e.g., pointed, rounded, truncated, emarginated, forked, lunate, paddle-shaped, wind-shaped, etc.).
  • a length of each fin 310 i.e., the distance between first end 311 and second end 312), denoted L, is 0.2 - 2 meters.
  • a width of each fin 310 i.e., the distance between first side 313 and second side 314), denoted W, is 0.2 - 2 meters.
  • a thickness of each fin 310 i.e., the distance between first wall 316 and second wall 317) is 0.001 - 0.8 meters.
  • a distance between fins 310, across base 330 is 10 - 20 centimeters.
  • a distance between back support 370 and fins 310 is 40 - 60 centimeters.
  • base 330 comprises a back support 370 and one or more straps 380.
  • back support 370 is ergonomically shaped to fit against the back of a user.
  • the one or more straps 360 are shaped such that back support 350 is secured to the user's body.
  • straps 360 comprise at least a pair of side straps 361 extending from a first end 362 to a second end 363.
  • a first side strap 361 extends from first side 333 of base 330 at first end 362 thereof and a second side strap 361 extends from second side 334 of base 330 at first end 362 thereof.
  • second ends 363 of side straps 361 are configured to be secured to each other, such as by a respective buckle or other securing mechanism.
  • side straps 361 are shaped and dimensioned such that they can extend around a front torso of the diver, as illustrated in FIGs. 18A - 18D.
  • straps 360 comprise at least a pair of shoulder straps 365 extending from a first end 366 thereof to a second end 367 thereof.
  • a first shoulder strap 365 extends from first end 331 of base 330, at first end 366 thereof and a second shoulder strap 365 extends from first end 331 of base 330, at first end 366 thereof.
  • shoulder straps 365 are generally parallel to each other.
  • shoulder straps 365 are shape and dimensioned such that they can each extend over a respective shoulder of the diver, as illustrated in FIGs. 18A - 18D.
  • second end 367 of each shoulder strap 365 is configured to be secured to the pair of side straps 361, such as by a respective buckle or other securing mechanism.
  • motorized glide unit 300 further comprises at least one power source 380 configured to supply power to motor/s 20, as described above in relation to power source 30.
  • the at least one power source 380 is secured to base 330 between a first fin 310 and a second fin 310.
  • the at least one power source 380 is secured within a hollow fin space 318 of a fin 310.
  • one or more thrusters 320 are positioned on (or within) base 330, between fins 310, and each fin 310 comprises a respective power source 380 secured within the hollow fin space 318 thereof.
  • a power source 380 is positioned on (or within) base 330, between fins 310, and each fin 310 has attached thereto a respective thruster 320.
  • a power source 380 and one or more thrusters 320 are positioned on (or within) base 330, between fins 310.
  • underwater motorized glide unit 300 further comprises a switch and a pull member (such as a string or rope), that activates the switch when pulled. Once activated, the switch ceases the operation of motors 20 of motorized glide unit 300.
  • a pull member such as a string or rope
  • underwater power system further comprises a rotation mechanism 390 and a control circuitry 395.
  • rotation mechanism 390 and control circuitry 395 are (hidden from view by attachment member 345, this is not meant to be limiting in any way, and rotation mechanism 390 can be positioned at any suitable location.
  • the rotation mechanism 390 comprises one or more motors.
  • the rotation mechanism 390 is configured, responsive to control circuitry 395, to rotate fins 310 about one or more rotation axes.
  • the control circuitry is in communication with a user input terminal (not shown).
  • the rotation axes include one or more of: a longitudinal axis 381 of base 330 that extends within plane 360, and is generally parallel to a longitudinal axis of the diver; an axis 382 that is generally perpendicular to axis 381 and extends within plane 360, and is generally parallel to the frontal axis of the diver; and an axis 383 that is generally perpendicular to plane 360 and generally parallel to the sagittal axis of the diver.
  • fins 310 each exhibit an angle of zero in relation to each of axes 381, 382 and 383.
  • the rotation mechanism 390 is configured to rotate fins 310 about axis 381 in either direction.
  • fins 310 are rotated downwards and in Fig. 18D fins 310 are rotated upwards.
  • the rotation mechanism 390 is configured to rotate fins 310 about axis 382 in either direction (not shown).
  • the rotation mechanism 390 is configured to rotate fins 310 about axis 383 in either direction (not shown).
  • the rotation about each of axis 381, 382 and 383 is up to 45 degrees in each direction.
  • the rotation of fins 310 can aid in turning, and/or changing the dive depth (including rising to the surface).
  • fins 310 create moment that aid in 3-dimensional motion in the water against the natural resistance of the water while moving forward.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Toys (AREA)

Abstract

Un appareil de propulsions pour plongée et natation pouvant être porté sur soi constitué : d'une base, conçue pour être positionnée contre le dos d'un plongeur ; d'une pluralité d'ailettes fixées à la base, chacune de la pluralité d'ailettes s'étendant à partir de la base le long d'un vecteur respectif ; d'au moins un moteur ; et d'au moins un propulseur conçu pour générer une poussée sous-marine en réaction au ou aux moteurs, chacun du ou des propulseurs comprenant une hélice respective.
PCT/IL2023/051032 2022-09-28 2023-09-26 Appareil de propulsion pour plongée et natation pouvant être porté sur soi WO2024069625A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US202263410786P 2022-09-28 2022-09-28
US63/410,786 2022-09-28
US202363481397P 2023-01-25 2023-01-25
US63/481,397 2023-01-25

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5365868A (en) * 1993-06-10 1994-11-22 Culotta Kenneth W Underwater propulsion system having reduced weight penalty and variable angle of thrust
WO2020231349A1 (fr) * 2019-05-15 2020-11-19 Inroon Apipu Combinaison sac à dos de type scooter à jet d'eau
US10940917B2 (en) * 2016-09-12 2021-03-09 Kai Concepts, LLC Watercraft device with hydrofoil and electric propeller system
WO2021128340A1 (fr) * 2019-12-27 2021-07-01 珠海云洲智能科技有限公司 Propulseur sous-marin
WO2022018719A1 (fr) * 2020-07-23 2022-01-27 Alfasurf Ltd. Alimentation électrique sous-marine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5365868A (en) * 1993-06-10 1994-11-22 Culotta Kenneth W Underwater propulsion system having reduced weight penalty and variable angle of thrust
US10940917B2 (en) * 2016-09-12 2021-03-09 Kai Concepts, LLC Watercraft device with hydrofoil and electric propeller system
WO2020231349A1 (fr) * 2019-05-15 2020-11-19 Inroon Apipu Combinaison sac à dos de type scooter à jet d'eau
WO2021128340A1 (fr) * 2019-12-27 2021-07-01 珠海云洲智能科技有限公司 Propulseur sous-marin
WO2022018719A1 (fr) * 2020-07-23 2022-01-27 Alfasurf Ltd. Alimentation électrique sous-marine

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