WO2022261016A1 - Embarcation personnelle dotée d'un système de propulsion en queue de poisson - Google Patents

Embarcation personnelle dotée d'un système de propulsion en queue de poisson Download PDF

Info

Publication number
WO2022261016A1
WO2022261016A1 PCT/US2022/032377 US2022032377W WO2022261016A1 WO 2022261016 A1 WO2022261016 A1 WO 2022261016A1 US 2022032377 W US2022032377 W US 2022032377W WO 2022261016 A1 WO2022261016 A1 WO 2022261016A1
Authority
WO
WIPO (PCT)
Prior art keywords
paddle
watercraft
hull
pivot body
pump system
Prior art date
Application number
PCT/US2022/032377
Other languages
English (en)
Inventor
Michael Railey
Original Assignee
Seajet Propulsion, Inc.
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 Seajet Propulsion, Inc. filed Critical Seajet Propulsion, Inc.
Publication of WO2022261016A1 publication Critical patent/WO2022261016A1/fr
Priority to US18/529,627 priority Critical patent/US20240208625A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/30—Propulsive elements directly acting on water of non-rotary type
    • B63H1/36—Propulsive elements directly acting on water of non-rotary type swinging sideways, e.g. fishtail type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B34/00—Vessels specially adapted for water sports or leisure; Body-supporting devices specially adapted for water sports or leisure
    • B63B34/20—Canoes, kayaks or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/04—Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H16/00—Marine propulsion by muscle power
    • B63H16/08—Other apparatus for converting muscle power into propulsive effort
    • B63H16/18—Other apparatus for converting muscle power into propulsive effort using sliding or pivoting handle or pedal, i.e. the motive force being transmitted to a propelling means by means of a lever operated by the hand or foot of the occupant

Definitions

  • This application relates to personal watercraft, such as, kayaks, canoes, and the like. More particularly, this application relates to personal watercraft that include a fishtail propulsion system.
  • Personal watercrafts such as, kayaks, canoes, paddleboards, etc.
  • a user uses the handheld paddle to propel and steer the watercraft.
  • Using a handheld paddle to maneuver a watercraft can tire a user, making maneuvering a watercraft difficult over an extended period of time.
  • personal watercrafts can include a motorized propeller, which can increase maneuverability.
  • Described herein are personal watercrafts that include fishtail propulsion systems.
  • a watercraft can include: a hull configured to float in water and including a cockpit configured to carry at least one passenger; a fishtail propulsion system comprising a pivot body pivotally coupled to a stern of the hull, the pivot body configured to pivot about an axis, the pivot body further comprising a recess configured to receive a pump system, a flexible paddle coupled to the pivot body such that the paddle pivots about the axis with the pivot body, and a pedal system comprising pedals operably coupled to the pivot body, wherein the pedals are configured to be actuated to cause the pivot body and the paddle to pivot about the axis, thereby causing the paddle to move in a side-to-side manner; and a pump system received in the recess of the pivot body, the pump system comprising a water intake and a water exhaust, the pump system configured to intake water through the water intake and exhaust water through the water exhaust to provide a propulsive force for the watercraft.
  • the watercraft can include one or more of the following features in any combination: (a) wherein the pedals are positioned within the cockpit and configured to be foot-operable; (b) the pedals comprise a right pedal and a left pedal, and the pedal system is configured such that alternatingly depressing the pedals causes the paddle to move back and forth in the side-to-side manner; (c) wherein the right pedal is operably connected to a right portion of the pivot body by a first linking mechanism, and the left pedal is operably connected to a left portion of the pivot body by a second linking mechanism; (d) wherein the first linking mechanism comprises a first cable, and the second linking mechanism comprises a second cable; (e) wherein the paddle comprises a flexibility that varies along a length of the paddle; (f) wherein the flexibility of the paddle increases from a proximal end of the paddle to a distal end of the paddle; (g) wherein the axis about which the pivot body pivots comprises a vertical axis; (h) wherein
  • a watercraft can include: a hull configured to float in water and including a cockpit configured to carry at least one passenger; and a fishtail propulsion system comprising a pivot body pivotally coupled to a stem of the hull, the pivot body configured to pivot about an axis, the pivot body further comprising a recess configured to receive a pump system, a flexible paddle coupled to the pivot body such that the paddle pivots about the axis with the pivot body, and a pedal system comprising pedals operably coupled to the pivot body, wherein the pedals are configured to be actuated to cause the pivot body and the paddle to pivot about the axis, thereby causing the paddle to move in a side-to- side manner.
  • the watercraft can include one or more of the following features in any combination: (a) wherein the pedals are positioned within the cockpit and configured to be foot-operable; (b) wherein the pedals comprise a right pedal and a left pedal, and the pedal system is configured such that altematingly depressing the pedals causes the paddle to move back and forth in the side-to-side manner; (c) wherein the right pedal is operably connected to a right portion of the pivot body by a first linking mechanism, and the left pedal is operably connected to a left portion of the pivot body by a second linking mechanism; (d) wherein the first linking mechanism comprises a first cable, and the second linking mechanism comprises a second cable; (e) wherein the paddle comprises a flexibility that varies along a length of the paddle; (f) wherein the flexibility of the paddle increases from a proximal end of the paddle to a distal end of the paddle; (g) wherein the axis about which the pivot body pivots comprises a vertical axis; (
  • FIG. 1 A is a top perspective view of an embodiment of a personal watercraft including an embodiment of a fishtail propulsion system including an integrated pump system.
  • FIG. IB is a detailed bottom perspective view of the fishtail propulsion system and integrated pump system of the personal watercraft of FIG. 1A.
  • FIG. 1C is a top view of the personal watercraft of FIG. 1 A.
  • FIG. ID is a side view of the personal watercraft of FIG. 1 A.
  • FIG. IE is a bottom view of the personal watercraft of FIG. 1 A.
  • FIG. 2 A is a top perspective view' of an embodiment of a fishtail propulsion system including an integrated pump system that is configured for use with a personal watercraft.
  • FIG. 2B is a bottom perspective view of the fishtail propulsion system and integrated pump system of FIG. 2 A.
  • FIG. 3 A is a top perspective view of an embodiment of a fishtail propulsion system that is configured for use with a personal watercraft.
  • FIG. 3B is a bottom perspective view of the fishtail propulsion system of
  • FIG. 3A is a diagrammatic representation of FIG. 3A.
  • FIG. 4A is a bottom perspective view of an embodiment of a personal watercraft that includes a recess formed in an underside of a hull thereof, the recess configured to receive a pump system for propelling the personal watercraft.
  • FIG. 4B is a bottom perspective view of an underside portion of a hull of a personal watercraft that includes a recess formed in the underside of the hull thereof, shown with a pump system for propelling the personal watercraft received within the recess.
  • FIG. 5 A is an exploded side view of an embodiment of a pump system configured to propel a personal watercraft as well as a corresponding recess configured to receive the pump system.
  • FIG. 5B is a perspective view of the pump system and corresponding recess of FIG. 5 A shown prior to insertion of the pump system into the recess.
  • FIG. 5C is a perspective view of the pump system and corresponding recess of FIG. 5 A shown after insertion of the pump system into the recess.
  • FIG. 6 is a side view of an embodiment of a personal watercraft including an embodiment of a fishtail propulsion system that is operable with a tiller.
  • Such fishtail propulsion systems can include a paddle that extends rearwardly from the stem of the watercraft and is operable in a lateral or side-to-side manner similar to the way in which a fish uses its tail or caudal fin.
  • the paddle can be operated in a variety of ways, including by pedal-driven systems.
  • the paddle can be used to provide propulsive and/or steering forces.
  • the fishtail propulsion systems can be used in combination with one or more pump systems that can be configured to provide additional propulsive force.
  • the fishtail propulsion systems can provide one or more unique advantages.
  • the fishtail propulsion systems are configured with a shape that improves the hydrodynamics of the watercraft and facilitates shallow draft operation.
  • the fishtail propulsions systems can provide efficient propulsive force. When used in combination with a pump system, the battery power required to run the propulsive pimps can be greatly reduced.
  • the fishtail paddle can provide improved steering and handling.
  • the fishtail propulsion systems can be used on boats that include a squared-off stem as an add-on outboard motor on the transom, providing a more hydrodynamic shape to the watercraft, thereby improving its performance.
  • the systems can be used on other types of boats and watercraft as well.
  • FIGs. 1A-1E provide various views of an embodiment of a personal watercraft 100 including an embodiment of a fishtail propulsion system 200 including an integrated pump system 300.
  • FIG. 1A is a top perspective view
  • FIG. IB is a detailed bottom perspective view' of the fishtail propulsion system and integrated pump system
  • FIG. 1C is a top view
  • FIG. ID is a side view
  • FIG. IE is a bottom view.
  • the personal watercraft 100 comprises a kayak.
  • the illustrated example is shown as a kayak, the principals of this disclosure — including those related to the fishtail propulsion systems (either with or without integrated pump systems) described herein — can be applied to or modified for use with other types of personal watercrafts.
  • the principals described herein can be configured for use many types of personal watercrafts including kayaks, canoes, surfboards, inflatable watercrafts, dinghies, life rafts, tenders, sail boards, stand up paddle boards (“SUP boards”), and pool toys, among others.
  • SUP boards stand up paddle boards
  • watercrafts described herein are referred to as “personal,” in some embodiments, such watercrafts can be configured for use by or with a capacity capable of carrying more than one person.
  • the watercrafts described herein can be used by or configured with a capacity capable of carrying one, two, three, four, or more people.
  • the personal watercraft 100 comprises a hull 102.
  • the hull 102 is configured to in size and shape to float in water and carry one or more passengers.
  • the hull 102 in the illustrated example is configured to carry a single passenger.
  • the hull 102 extends from bow 104 to stern 106 and includes a port sidewall 108 and a starboard sidewall 110.
  • a recess formed into an upper portion of the hull 102 forms a cockpit 112 configured to receive a user during use.
  • the cockpit includes an integrally formed seat 114 as well as several different integrally formed foot supports configured to accommodate users of different sizes.
  • the hull 102 is configured as a plastic molded hull.
  • the specific illustrated configuration of the hull 102 should not be considered as limiting. Many other possibilities for the size, shape, and method of manufacture of the hull exist.
  • the hull may be inflatable.
  • the personal watercraft 100 includes the fishtail propulsion system 200 at the stem 206 of the hull 102.
  • the fishtail propulsion system 200 includes an integrated pump system 300, although the pump system 300 need not be included in all embodiments.
  • FIGs. 3A and 3B illustrate an example fishtail propulsion system 200b that does not include an integrated pump system 300 and which will be described in more detail further below.
  • the fishtail propulsion system 200 includes a paddle 202 that is configured to articulate back and forth in a lateral or side-to-side manner.
  • the lateral or side-to-side movement of the paddle 202 can be considered, in some respects, similar to the natural swimming motion provided by the tail fin or caudal fin of a fish. For this reason, the system is referred to herein as a “fishtail” propulsion system.
  • articulation of the paddle 202 can be used to propel the personal watercraft 100 and/or to steer the personal watercraft 100.
  • the paddle 202 is pivotally connected to the hull 102.
  • the paddle 202 is pivotally connected to the stern 106 of the hull 102.
  • a transom 118 of the stem 106 may include a post, axle, pivot, hinge, or other mechanism that is configured to pivotally connect to the paddle 202 to allow the paddle 202 to pivot in a lateral or side-to-side manner relative thereto.
  • the paddle 202 is connected so as to pivot about an axis 208, which, in general, extends orthogonally to a plane in which the hull 102 lies.
  • the axis 208 can extend vertically or perpendicularly to the surface of water in which the personal watercraft is floating.
  • the fishtail propulsion system 200 can include the paddle 202 and a pedal system 204.
  • the pedal system can include pedals 206 (e.g., right and left pedals) that are configured to be foot-operable.
  • the pedals 206 can be positioned within the cockpit 102 of the hull in proximity to the foot supports 116. In some embodiments, the position of the pedals 206 can be adjusted to accommodate users of different sizes. For example, in some embodiments, the pedals 206 can be positioned at any of the different foot support 116 positions. In some embodiments, the pedals 206 can be positioned so as to be operated by hand.
  • each pedal 206 is operably connected to the paddle 202.
  • This operable connection allows the pedals 206 to be used to control the position of the paddle 202.
  • depressing the left pedal 206 can cause the distal tip of the paddle 202 to move in to the left (to the port side), and depressing the right pedal 206 can cause the distal tip of the paddle 202 to move to the right (to the starboard) side.
  • the pedals 206 can be used to steer the personal watercraft.
  • the paddle 202 can be used as a rudder by depressing the left pedal 206 to cause the personal watercraft 100 to turn to the left and by depressing the right pedal 206 to cause the personal watercraft 100 to turn to the right.
  • the operable connection between the pedals 206 and the paddle 202 can be used to allow the paddle 202 to propel or drive the personal watercraft 100 in a forward direction.
  • the paddle 202 will be driven in a corresponding side-to-side motion that will cause the personal watercraft 100 to move in a forward direction similar to the manner in which a fish swims.
  • the paddle 202 is illustrated with a curved shape.
  • the paddle 202 may comprise a curved shape; however, in preferred embodiments, the paddle 202 comprises a generally flat or planar (non-curved shape).
  • the paddle 202 may comprise a flexible material such that, during use of the paddle 202, the paddle 202 flexes or curves as it is pivoted through the water. This may, once again, facilitate a fishlike motion for the paddle 202. For example, as a fish tail swishes to the right the flexible tail bends left, storing energy that is released when the tail begins to swish left.
  • the paddle 202 can, in some embodiments, operate in a similar manner.
  • the paddle 202 of FIGs. 1 A-1E is illustrated as curved, it is actually shown in a flexed state, as it may appear during use.
  • the pedals 206 are operably connected to the paddle 202 by cables 210.
  • a first cable 210 extends between the left pedal 206 and the paddle 202.
  • the first cable 210 is connected to the paddle 202 at a position on the left side of the axis 208 about which the paddle 202 pivots.
  • the length of the cable 210 is configured such that depressing the left pedal 206 causes the cable to pull on the paddle 206 in a direction which causes a clockwise rotation of the paddle 202 about the axis 208.
  • a second cable 210 extends between the right pedal 206 and the paddle 202.
  • the second cable 210 is connected to the paddle 202 at a position on the right side of the axis 208 about which the paddle 202 pivots.
  • the length of the second cable 210 is configured such that depressing the right pedal 206 causes the cable to pull on the paddle 206 in a direction which causes a counter-clockwise rotation of the paddle 202 about the axis 208. Further, this configuration only permits one of the pedals 206 to be depressed at one time.
  • the cables 210 comprise flexible Bowden cables, wherein force is transmitted through an inner cable that moves within a hollow outer cable housing.
  • the right and left cables 210 extend along the interior port and starboard sidewalls 108, 110 of the hull 102 and the cables 210 are configured in size and shape to contour around a user seated in the cockpit.
  • the cables 210 can be routed through the hull 102 (e.g., within passages formed within the sidewalls 108, 110 or within another portion of the hull 102).
  • other linking structures for operably connected the pedals 206 to the paddle 202 can be used.
  • the illustrated cables 202 can be replaced with rods, chains, cords, bands, belts, etc.
  • the personal watercraft 100 can be steered and propelled by operating the pedals 206 to control the paddle 202.
  • the illustrated embodiment of the personal watercraft 100 of FIGs. 1 A-1E also includes a pump system 300 for additional propulsive assistance.
  • the pump system 300 is integrated into the paddle 202.
  • the pump system 300 is configured to intake and accelerate water so as to provide an additional propulsive force for moving the personal watercraft 100.
  • the pump system 300 can, in some embodiments, be integrated into a bottom surface of the paddle 202.
  • the integrated pump system 300 is removably integrated into the paddle 202.
  • the pump system 300 may be provided in a housing that can be removably received into a corresponding recess formed in the bottom surface of the paddle 202.
  • An example of such a pump system 300 that is configured to be removably received into a recess is shown in FIGs. 5A-5C, which are described in more detail below'.
  • the pump system 300 can be integrated into the paddle 202 in a generally non-removable or permanent manner.
  • the illustrated pump system 300 includes a pump housing 302.
  • the pump housing 302 houses the components of system 300 and forms a water intake 304 and a water exhaust 306.
  • the pump system 300 draws water in through the water intake 304, accelerates it, and pushes it out through the water exhaust 306 in a manner that provides a force which propels the personal watercraft 100 in a forward direction.
  • the pump system 300 can be electric and can be powered by batteries positioned within the pump housing 302 or elsewhere in the personal watercraft 100.
  • the propulsive force provided by the pump system 300 can be directed or steered by using the pedals 206. That is, the pump system 300 can turn or pivot with the paddle 202 to direct the force.
  • a throttle or other controller is provided, for example, in the cockpit or on a handheld remote control that allows the user to control the pump system 300.
  • a controller can be provided to activate, deactivate, and/or control the power of the pump system 300.
  • Example pump systems 300 including the internal components thereof, are described in detail below' with reference to FIGs. 5A-5C. Additional pump systems that can be used in combination with the fishtail propulsion system 200 are described in U.S. Pat. No. 10,689,077, entitled “Water Pump for Watercraft, which issued on June 23, 2020, from U.S. Application No. 16/570,967, filed September 13, 2019. Both U.S. Pat. No. 10,689,077 and U.S. Application No. 16/570,967 are incorporated herein by reference in their entireties and for all purposes. [0049] Although the embodiment of the personal watercraft 100 illustrated in FIGs.
  • 1A-1E includes a pump system 300 integrated into the paddle 202 of the fishtail propulsion system, this need not be the case in all embodiments.
  • the pump system 300 can be integrated ( either removably or permanently) into the hull 202 of the watercraft 100 (see the example of FIGs. 4A and 4B described below).
  • the pump system 300 can be omitted entirely or more than one pump system 300 can be included.
  • FIG. 1C illustrates a top down view of the personal watercraft 100.
  • an angle 212 is shown.
  • the angle 212 can represent the maximum degree to which the paddle 202 can pivot or rotate about the axis 208 relative to the central, longitudinal axis of the personal watercraft 100.
  • the angle 212 can be about 10 degrees, 15 degrees, 20 degrees, 25 degrees, 30 degrees, 35 degrees, 40 degrees, 45 degrees, 50 degrees, 55 degrees, 60 degrees or more.
  • the angle 212 can be at least 10 degrees, 15 degrees, 20 degrees, 25 degrees, 30 degrees, 35 degrees, 40 degrees, 45 degrees, 50 degrees, 55 degrees, 60 degrees or more.
  • the angle 212 can be at most 10 degrees, 15 degrees, 20 degrees, 25 degrees, 30 degrees, 35 degrees, 40 degrees, 45 degrees, 50 degrees, 55 degrees, 60 degrees.
  • the paddle 202 can also be pivoted, in equal amounts, to the starboard side 110. Accordingly, in some embodiments, the paddle 202 can be pivoted through a total range of motion of about 20 degrees, 30 degrees, 40 degrees, 50 degrees, 60 degrees, 70 degrees, 80 degrees, 90 degrees, 100 degrees, 110 degrees, 120 degrees or more. In some embodiments, the paddle 202 can be pivoted through a total range of motion of at least 20 degrees, 30 degrees, 40 degrees, 50 degrees, 60 degrees, 70 degrees, 80 degrees, 90 degrees, 100 degrees, 110 degrees, 120 degrees or more. In some embodiments, the paddle 202 can be pivoted through a total range of motion of at most 20 degrees, 30 degrees, 40 degrees, 50 degrees, 60 degrees, 70 degrees, 80 degrees, 90 degrees, 100 degrees, 110 degrees, 120 degrees.
  • a greater range of pivoting motion for the paddle 202 can lead to an increased propulsive or steering force that can be provided by the paddle 202.
  • Other factors also contribute to the propulsive or steering force provided by the paddle 202, including, for example, the shape of the paddle (including its height and length).
  • gearing can be provided between the pedals 206 and the paddle 202 such that the force required to operate the pedals 206 and/or the range of motion of the paddle 202 associated with operation of the pedals 206 can be adjusted.
  • FIG. ID illustrates a side view of the personal watercraft 100.
  • This view illustrates that, for some embodiments, the paddle 202 extends outwardly from the stern 106 of the hull 202 and that the overall draft of the personal watercraft 100 remains shallow. That is, in some embodiments, the paddle 202 need not extend below the lowest point of the hull 102.
  • This can provide significant advantages when compared with other pedal driven kayak propulsion systems which generally include structures that project downwardly from a bottom surface of the hull 202 and greatly increase the draft of the kayak.
  • the personal watercraft 100 includes a shallow draft and is thus capable of being operated in shallow water.
  • both the paddle 202 and the pump system 300 are positioned above the lowest point of the hull. In some embodiments, the paddle 202 is positioned above the lowest point of the hull. In some embodiments, the paddle 202 extends below the lowest point of the hull by at most 5 cm, 10 cm, 15 cm, 20 cm, 25 cm, or 30 cm.
  • the fishtail propulsion 200 system provides the stem 106 of the personal watercraft 100 with a very hydrodynamic shape, facilitating its movement through the water and decreasing the amount of force required for that movement.
  • FIGs. 2A and 2B are top and bottom perspective views of an embodiment of the fishtail propulsion system 200 including an integrated pump system 300 that is configured for use with a personal watercraft, such as the personal watercraft 100 of FIGs. 1 A- 1E.
  • the fishtail propulsion system 200 includes a pivot body 220.
  • the pivot body 220 can comprise a rigid structure configured to pivotally attach to the transom 118 at the stern 106 of the personal watercraft 100.
  • the pivot body 108 can comprise a wider shape that can, in some embodiments, correspond in width to the width of the stem 106 of the personal watercraft 100 (see FIGs. 1C and IE) allowing a smooth and hydrodynamic transition between the hull 102 and the pivot body 108.
  • the cables 206 (or other structures) which operate the fishtail propulsion system 200 can attach to the proximal end of the pivot body 220, and the width of the pivot body 220 provides a lever arm for the force imparted on the pivot body which causes rotation about the axis 208.
  • this lever arm (measured between the axis 208 and the point on the pivot body 220 at which the cables 206 attach) can be at about 2.5 cm, 5 cm, 7.5 cm, 10 cm, 12.5 cm, 15 cm, 17.5 cm, 20 cm, or greater. In some embodiments, the lever arm can be greater than about 2.5 cm, 5 cm, 7.5 cm, 10 cm, 12.5 cm, 15 cm, 17.5 cm, 20 cm, or greater.
  • the shape of the pivot body 220 at the proximal end can be configured to provide this lever arm.
  • a lower portion of the pivot body 220 can include a pump system housing 222 configured in size and shape to receive the pump system 300.
  • the pump housing 222 may provide a recess into which the pump system 300 is received, for example, in the manner described below in relation to FIGs. 5A-5C.
  • the pump system 300 is removably received in the recess of the pump housing 222, while in other embodiments, the pump system 300 is permanently received (e.g., non-removably received) therein.
  • the pump housing 222 is configured so as to orient the water exhaust 306 of the pump system 300 in a direction that is generally aligned with the paddle 202. By forming the pump housing 222 on the pivot body 220, the pump system 300 pivots with the fishtail propulsion assembly 200.
  • a distal end of the pivot body 208 attaches to the paddle 202.
  • the pivot body 208 is configured to generally decrease in width to match the width of the paddle 202 and to maintain a hydrodynamic shape. While this may be advantageous, it is not necessary in all embodiments.
  • the paddle 202 can be made of a flexible material. In some embodiments, the paddle 202 is uniformly flexible. In some embodiments, the paddle 202 becomes increasingly flexible moving from its proximal edge to its distal edge. That is, in some embodiments, the distal portion of the paddle 202 may be more flexible than a proximal portion. Variation in flexibility can be achieved in many ways. As one example, the thickness of the paddle 202 may be decrease to provide increased flexibility. In some embodiments, various materials with different flexural properties can be used to vary flexibility. In some embodiments, ribs, grooves, slots, holes, or other structures can be formed into the paddle 202 to vary the flexibility in various regions. In some embodiments, various supports (e.g., rods, meshes, or other reinforcing structures) can be placed into the paddle 202 to vary the flexibility.
  • various supports e.g., rods, meshes, or other reinforcing structures
  • a flexible paddle may mimic the way in which a fish swims. For example, as a fish tail swishes to the right the flexible tail bends left, storing energy that is released when the tail begins to swish left.
  • the paddle 202 can, in some embodiments, operate in a similar manner. The energy stored in the flexed paddle 202 during operation may increase the propulsive force provided by the fishtail propulsion system 200.
  • FIGs. 3A and 3B are top and bottom perspective views of an embodiment of a fishtail propulsion system 200b that is configured for use with a personal w'atercraft.
  • the fishtail propulsion system 200b of FIGs. 3 A and 3B is similar to the fishtail propulsion system 200 of FIGs. 2A and 2B, except that it does not include a pump housing 222 for housing a pump system 300.
  • FIGs. 3A and 3B illustrate that, in some embodiments, the fishtail propulsion system 200b need not include a pump system 300.
  • the fishtail propulsion system 200 need not include a pump system 300.
  • the pump system 300 can be entirely omitted from the personal watercraft 100, or, as shown in FIGs. 4A and 4B, the pump system 300 can be configured to be received (either permanently or removably) into the hull 102 of the personal watercraft 100.
  • FIG. 4A is a bottom perspective view of an embodiment of the personal watercraft 100 that includes a recess 125 formed in an underside of the hull 102 thereof.
  • the recess 125 can be configured to receive the pump system 300 for propelling the personal watercraft 100.
  • FIG. 4B is a bottom perspective view of the underside portion of the hull 102 of the personal watercraft 100.
  • the pump system 300 for propelling the personal watercraft is received within the recess 125.
  • the pump body 302 is positioned within the recess 125 formed on the underside of the hull 102.
  • the pump system 300 is configured to intake water through a water intake 304 and accelerate it out though a water exhaust 306 to provide a propulsive force.
  • the personal watercraft of FIGs. 4A and 4B can include a fishtail propulsion system as illustrated in either FIGs. 2A and 2B or FIGs. 3A and 3B.
  • FIGs. 5A-5C depict a pump system 1000 configured to be placed within a recess 1106 of a personal watercraft.
  • the pump system 1000 may be used as any of the pump systems 300 described above.
  • the recess 1106 described with reference to FIGs. 5A-5C can be a recess in the fishtail propulsion system 200, such as is shown in FIGs. 1A-1E or 2A and 2B, or the recess 125 in the hull 102 of FIG.s 4A and 4B.
  • FIG. 5A is an exploded side view of an embodiment of the pump system 1000 and corresponding recess 1106.
  • FIG. 5B is a perspective view of the pump system 1000 and corresponding recess 1106 shown prior to insertion of the pump system into the recess.
  • FIG. 5C is a perspective view of the pump system 1000 and corresponding recess 1106 shown after insertion of the pump system into the recess.
  • the pump system 1000 includes a hatch 1002, a power unit body 1008, a motor 1006, motor contacts 1004, a drive shaft 1012, a shaft cover 1010, an impeller 1014, a flow straightener 1016, and a pump nozzle 1018.
  • the hatch 1002 can connect to the power unit body 1008 through a snap fit, friction fit, bonding, or other mechanical means.
  • the connection between the hatch 1002 and the power unit body 1008 forms a watertight seal that prevents water from entering inside the hatch 1002 or power unit body 1008.
  • the motor 1006 Installed inside the power unit body 1008 is the motor 1006.
  • the motor may be sealed between the power unit body 1008 and the hatch 1002 when the hatch 1002 is installed on the power unit body 1008.
  • the shaft cover 1010 may connect to the lower section of power unit body 1008.
  • the shaft cover 1010 can form a watertight seal with the power unit body 1008 so as to prevent water from entering inside the power unit body 1008.
  • the drive shaft 1012 may be configured to be installed within the shaft cover 1010.
  • the drive shaft 1012 connects to the motor 1006.
  • the drive shaft 1012 connects to the motor 1006 by being installed in a direct drive arrangement with the motor 1006.
  • the drive shaft 1010 connects to the motor 1006 through a gearbox or belt system.
  • the drive shaft 1012 can contain one or more O-ring or other sealant placed on the outer half of the drive shaft. The O-ring or sealant can prevent water from entering inside the power unit body 1008 through the inside of the shaft cover 1010.
  • Connected to the end of the drive shaft 1012 is an impeller 1014.
  • the impeller 1014 can be installed on the end of the drive shaft 1012 through several mechanical means, including, for example, threading onto the drive shaft, bonding, welding, snap fit, or friction fit.
  • the impeller 1014 is an axial impeller.
  • the impeller 1014 has a symmetrical design, where the blades of the impeller 1014 are symmetrical about the centerline. This symmetrical design allows the blades of the impeller 1014 to create the same flow' pattern no matter which side of the impeller 1014 is mounted to the drive shaft 1012.
  • the flow' straightener 1016 is installed on one end of the impeller 1014. In some embodiments, the flow straightener does not contact the impeller 1014 when installed within the pump system 1000.
  • the flow straightener 1016 is positioned within the power unit body 1008. In other embodiments, the flow straightener 1016 is installed within the pump nozzle 1018.
  • the pump nozzle 1018 connects to the power unit body 1008. In some embodiments, the pump nozzle 1018 is installed on a lower end of the power unit body 1008.
  • the pump system 1000 may use other components as well.
  • the power unit body 1008 can further house a motor controller, one or more batteries, an air pump, a wireless receiver, a wireless transmitter, one or more motor control systems, battery control systems, and/or sensors (including water sensors), among other components.
  • the pump system 1000 can be installed inside a recess 1106 of a personal watercraft or fishtail propulsion system and include a recess wall 1100.
  • the recess wall 1100 is sized and shaped in a manner that allows for the pump system 1100 to be placed within the recess 1106 so that bottom section of the power body unit 1008 is about flush with the recess 1106.
  • the pump system 1000 can be held in place through various mechanical and chemical means, including, for example, clamps, fasteners, bonding, welding, friction fit, or snap fit.
  • a mounting plate is used to mount and hold the pump system 1000 in place. Once installed, the pump system 1000 can form a watertight seal with the recess wall 1100 so as to prevent water from entering into the recess 1106.
  • a grate can be placed over the front compartment
  • the grate can have one or more (for example, 2, 3, 4, 5, 6, 7, 8, 9, 10, or more) bars extending across the front compartment 1020.
  • the grate can prevent or restrict debris from entering into the pump system 1000 while still permitting water to enter into the pump system 1000.
  • the motor contacts 1004 can contact and form a connection with the motor controller 1102.
  • the motor controller 1102 can be accessible to a user of the personal watercraft while the user is seated therein. In some embodiments, the user will need to remove an access hatch to access the motor controller 1102. In other embodiments, the motor controller 1102 is readily accessible to the user without the user needing to remove or open any additional equipment.
  • the motor controller 1102 can be connected to an external battery through a set of cables 1104. Because the external battery is connected to the cables 1104, the external battery can be installed within the personal watercraft at multiple locations, including locations that allow the external battery to be easily accessible by the user. In some embodiments, a user can replace the external battery without having to uninstall any part of the pump system 1000. The external battery can be used to power the motor 1006. Once the external battery is installed, the motor controller 1102 can distribute power to the motor 1006.
  • the pump system 1000 operates by drawing water in through the front compartment 1020 on the power unit body 1008. Water is drawn into the front compartment 1020 due to the motor 1006 driving the impeller 1014. In some embodiments, the impeller 1014 reduces the pressure of the water, creating suction downstream of the impeller 1014 (e.g. creates suction near the front compartment 1014). Reducing the water pressure draws the water through the front compartment 1020 and into the power unit body 1008. The water drawn into the front compartment 1020 travels over the impeller 1014, which assists with moving the water through the pump system 1000. After the water travels over the impeller 1014, the water travels over the flow straightener 1016, causing the water to form a laminar flow (e.g.
  • the flowstraightener reduces or removes the spin on the water created by the impeller).
  • the water then exits the pump system 1000 at the pump nozzle 1018, creating a jet of water that propels the kayak 1300 forward.
  • water can be drawn in through the pump nozzle 1018 and expelled out of the front compartment 1020.
  • the motor 1006 can spin the impeller 1014 in the opposite direction of normal operation. Spinning the impeller 1014 in the opposite direction can lower the water pressure on the opposite side of the impeller 1014 (e.g. on the side near the pump nozzle 1018), causing wrater to be drawn in through the pump nozzle 1018 and directed to the front compartment 1020.
  • the pump system 1000 can be controlled through the motor controller 1102.
  • the motor controller 1102 can be configured to control the pump system 1000 in a manner as described with other embodiments herein.
  • the motor controller 1102 may be configured to activate or deactivate the motor 1006, control the speed of the motor 1006 and/or the amount of power supplied to the motor 1006, and/or control other motor 1006 functions.
  • the motor 1006 can receive power through an external power source, such as an external battery.
  • the external battery can be connected to the pump system 1000 through cables 1104.
  • the recess 1106 can have sidewalls and a base.
  • the recess 1106 can form a V-shape or U-shape profile on the end near the pump nozzle 1018. This profile can increase thrust by constricting water as it exits the pump nozzle 1018.
  • water may be expelled from the pump nozzle 1018 towards the sloped area of the recess 1106 to create a Coanda Effect.
  • the pump nozzle 1018 can have an oval-shaped end.
  • the oval-shaped end can be similar to the oval-shaped end 815 described herein in both size and function.
  • the oval-shaped end can increase thrust from water expelled from the pump nozzle 1018.
  • the oval-shaped end can operate as a nonintrusive flow straightener.
  • the water expelled from the pump nozzle 1018 forms a tight rope and maintains the tight rope shape over a long distance (for example, about 25 feet).
  • the pump nozzle 1018 can increase the thrust and efficiency from the pump system 1000.
  • the pump nozzle 1018 has a constricted end (e.g. one end is narrower than the other end). The constricted end can increase the acceleration of the water as it flows out of the pump nozzle 1018.
  • the pump system 1000 can powered by compressed air.
  • the motor 1006 is a pneumatic motor which can be powered by air.
  • the cables 1104 can connect to an air tank and the motor controller 1102 can assist with regulating air flow to the motor.
  • a second pump system 1000 can be installed on base of the watercraft. The second pump system 1000 can function substantially similar to the first pump system 1000.
  • FIG. 6 is a side view of an embodiment of a personal watercraft 100 including an embodiment of a fishtail propulsion system 200 that is operable with a tiller 230.
  • the tiller 230 can be connected to the fishtail propulsion system at the pivot point such that the tiller can be moved right and left to cause a corresponding rotation of the fishtail propulsion system. In this manner the tiller 230 can be operated to steer or propel the watercraft by moving the paddle 202.
  • conditional language used herein such as, among others, “can,” “could,” “might,” “may,” “e.g.,” and the like, unless specifically stated otherwise, or otherwise understood within the context as used, is generally intended to convey that certain embodiments include, while other embodiments do not include, certain features, elements and/or steps.
  • conditional language is not generally intended to imply that features, elements and/or steps are in any way required for one or more embodiments or that one or more embodiments necessarily include logic for deciding, with or without author input or prompting, whether these features, elements and/or steps are included or are to be performed in any particular embodiment.
  • the methods disclosed herein may include certain actions taken by a practitioner; however, the methods can also include any third-party instruction of those actions, either expressly or by implication.
  • the ranges disclosed herein also encompass any and all overlap, sub-ranges, and combinations thereof.
  • Language such as “up to,” “at least,” “greater than,” “less than,” “between,” and the like includes the number recited. Numbers preceded by a term such as “about” or “approximately” include the recited numbers and should be interpreted based on the circumstances (e.g., as accurate as reasonably possible under the circumstances, for example ⁇ 5%, ⁇ 10%, ⁇ 15%, etc.).
  • a phrase referring to “at least one of’ a list of items refers to any combination of those items, including single members.
  • “at least one of: A, B, or C” is intended to cover: A; B; C; A and B; A and C; B and C; and A, B, and C.
  • Conjunctive language such as the phrase “at least one of X, Y and Z,” unless specifically stated otherwise, is otherwise understood with the context as used in general to convey that an item, term, etc. may be at least one of X, Y or Z.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Harvesting Machines For Specific Crops (AREA)

Abstract

Sont décrits ici une embarcation et des systèmes de propulsion qui lui sont destinés. Selon un exemple, une embarcation comprend une coque conçue pour flotter dans l'eau et un poste de pilotage conçu pour transporter au moins un passager. L'embarcation comprend en outre un système de propulsion en queue de poisson qui comprend un corps de pivot accouplé pivotant à une poupe de la coque, le corps de pivot étant conçu pour pivoter autour d'un axe, le corps de pivot comprenant en outre un évidement conçu pour recevoir un système de pompe, une palette flexible accouplée au corps de pivot de telle sorte que la palette pivote autour de l'axe avec le corps de pivot, et un système de pédale comprenant des pédales accouplées fonctionnellement au corps de pivot, les pédales étant conçues pour être actionnées afin d'amener le corps de pivot et la palette à pivoter autour de l'axe, ce qui permet d'amener la palette à se déplacer côte à côte.
PCT/US2022/032377 2021-06-07 2022-06-06 Embarcation personnelle dotée d'un système de propulsion en queue de poisson WO2022261016A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US18/529,627 US20240208625A1 (en) 2021-06-07 2023-12-05 Personal watercraft with fishtail propulsion system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202163197904P 2021-06-07 2021-06-07
US63/197,904 2021-06-07

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US18/529,627 Continuation US20240208625A1 (en) 2021-06-07 2023-12-05 Personal watercraft with fishtail propulsion system

Publications (1)

Publication Number Publication Date
WO2022261016A1 true WO2022261016A1 (fr) 2022-12-15

Family

ID=84425431

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2022/032377 WO2022261016A1 (fr) 2021-06-07 2022-06-06 Embarcation personnelle dotée d'un système de propulsion en queue de poisson

Country Status (2)

Country Link
US (1) US20240208625A1 (fr)
WO (1) WO2022261016A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5163857A (en) * 1991-09-11 1992-11-17 Hinsley George A Self-propelled boat
WO2005115833A2 (fr) * 2004-05-14 2005-12-08 Vector Magnetics, Inc. Systeme d'aviron face a l'avant, pourvu d'un rouleau pour le talon
US20090004933A1 (en) * 2006-02-02 2009-01-01 Rudolf Lackner Water Craft With a Buoyancy Body
US20090104828A1 (en) * 2007-10-23 2009-04-23 Drew Allen Krah Human powered watercraft
US20150011133A1 (en) * 2011-09-07 2015-01-08 Boomerboard, Llc Inflatable watercraft with battery powered motorized cassette

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5163857A (en) * 1991-09-11 1992-11-17 Hinsley George A Self-propelled boat
WO2005115833A2 (fr) * 2004-05-14 2005-12-08 Vector Magnetics, Inc. Systeme d'aviron face a l'avant, pourvu d'un rouleau pour le talon
US20090004933A1 (en) * 2006-02-02 2009-01-01 Rudolf Lackner Water Craft With a Buoyancy Body
US20090104828A1 (en) * 2007-10-23 2009-04-23 Drew Allen Krah Human powered watercraft
US20150011133A1 (en) * 2011-09-07 2015-01-08 Boomerboard, Llc Inflatable watercraft with battery powered motorized cassette

Also Published As

Publication number Publication date
US20240208625A1 (en) 2024-06-27

Similar Documents

Publication Publication Date Title
US9914519B2 (en) Propulsion system for a watercraft
US5460551A (en) Pedal-powered kayak
EP0764111B1 (fr) Vehicule de nagivation hydropulse
US7731553B2 (en) Watercraft propelled by a water jet
US20090042461A1 (en) Watercraft with selectively retractable and stowable propulsion device
EP0396829A1 (fr) Plate-forme d'observation sous-marine propulsée
JP2843678B2 (ja) 多目的ウォータクラフト
US20240208626A1 (en) Water pump for watercraft
US11130549B2 (en) Self-propelling hydrofoil device
KR20200124276A (ko) 부력 재료로 만들어진 워터 보드 및 전동 선박과 그런 워터 보드를 포함하는 수상 스포츠 장치
JP2011098711A (ja) 船用推進システム
US5643020A (en) Personal watercraft
US6478639B1 (en) Watercraft having jet propulsion and electric outdrive
US20110223816A1 (en) Combination hand-held multi-directional propulsion device and powered oar/paddle for rowboat, canoe, kayak, and the like
US20240208625A1 (en) Personal watercraft with fishtail propulsion system
US6199499B1 (en) Manually operated catamaran vessels, steering apparatus for such vessels and method of steering such vessels
US6872105B2 (en) Watercraft having a jet propulsion system with improved efficiency
JP3176632B2 (ja) 高性能モータ水上スキー
JP2023544081A (ja) 水通路及び／又は空気通路を含むウォータークラフトシステム
US5360357A (en) Self-propelled watercraft
US6668741B1 (en) High performance sailing craft
JP3048492B2 (ja) ウォータクラフト
JPS5977996A (ja) 帆走艇
GB2416340A (en) Wind driven propulsion unit
JP2004352211A (ja) 駆動力付小型水上ボード

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22820844

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 22820844

Country of ref document: EP

Kind code of ref document: A1