US3910215A - Safety system for hydrofoil craft - Google Patents

Safety system for hydrofoil craft Download PDF

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Publication number
US3910215A
US3910215A US372235A US37223573A US3910215A US 3910215 A US3910215 A US 3910215A US 372235 A US372235 A US 372235A US 37223573 A US37223573 A US 37223573A US 3910215 A US3910215 A US 3910215A
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US
United States
Prior art keywords
strut
hull
craft
movement
struts
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
US372235A
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English (en)
Inventor
Kenneth L Soderman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Boeing Co
Original Assignee
Boeing Co
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 Boeing Co filed Critical Boeing Co
Priority to US372235A priority Critical patent/US3910215A/en
Priority to GB5144473A priority patent/GB1398668A/en
Priority to SE7315097A priority patent/SE405100B/xx
Priority to NL7315847A priority patent/NL7315847A/xx
Priority to DE19732359323 priority patent/DE2359323C3/de
Priority to IT53983/73A priority patent/IT997692B/it
Priority to BE1005538A priority patent/BE807949A/xx
Priority to JP48134011A priority patent/JPS5021488A/ja
Priority to DK643973*A priority patent/DK643973A/da
Priority to ES421009A priority patent/ES421009A1/es
Priority to FR7342868A priority patent/FR2234179B1/fr
Priority to ZA739530A priority patent/ZA739530B/xx
Priority to AU63798/73A priority patent/AU6379873A/en
Priority to NO4896/73A priority patent/NO140371C/no
Priority to CH171474A priority patent/CH584131A5/xx
Priority to CA192,291A priority patent/CA988784A/en
Priority to BR1166/74A priority patent/BR7401166D0/pt
Application granted granted Critical
Publication of US3910215A publication Critical patent/US3910215A/en
Priority to HK305/76*UA priority patent/HK30576A/xx
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/16—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces
    • B63B1/24—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces of hydrofoil type
    • B63B1/28—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces of hydrofoil type with movable hydrofoils
    • B63B1/30—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces of hydrofoil type with movable hydrofoils retracting or folding

Definitions

  • the restraining device constitutes a mechanical fuse device which holds the strut in place during nor- [56] References Cited mal operation but ruptures or yields in response to im- UNITED STATES PATENTS pact forces on the strut to permit the strut to pivot in 2,771,051 11/1956 Von Schertel 114 665 H case Show? Smke the water dumg 2,795,202 6/1957 Hook 114/665 H Speed operatlon- The Plvotal movement of the Strut 3,031,723 3/1963 wilterdink et 1 114/665 H reduces the dangerously rapid deceleration that would 3,151,593 10/1964 Wennagel et a1...
  • the present invention relates to hydrofoil craft, and more particularly to a safety support system for the foilcarrying struts.
  • l-Iydrofoil craft have foils which move through the water during flight, that is, during foil-borne operation of the craft, and develop lift in much the same manner as an airplane wing.
  • the foils are carried on struts which are attached to the hull of the craft and hold the hull clear of the water during flight.
  • the struts are usually mounted on the hull in a manner which permits the struts to be retracted so that the hull can float on the water and the craft can be operated in a hull-borne mode as a normal ship.
  • the struts When foil-borne operation is desired, the struts are moved to their extended position and locked in place. In this mode of operation, very high speeds can be attained as compared with conventional ship speeds. These high speeds, however, involve a safety problem resulting from the possible presence of floating or submerged objects in the water in unexpected or unpredictable places. If one of the struts or foils strikes a sizable object of this kind, such as a floating log, for example, while traveling at high speed, the resulting impact forces result in an extremely rapid deceleration of the craft, and usually in damage to the foil-support system and to the hull structure itself.
  • a safety mounting support system for the struts of a hydrofoil craft which limits or reduces the rate of deceleration resulting from impact forces caused by one of the struts or foils striking a floating or submerged object, and which limits or minimizes the possible structural damage by providing a predetermined failure path.
  • the struts are supported on the hull in a manner to permit pivotal movement in the aft direction but are normally held against such movement during foil-borne operation by substantially rigid restraining means.
  • the forward strut is preferably mounted on a supporting structure in a manner to permit the strut to move relative to the supporting structure between the normal retracted and extended positions.
  • the supporting structure itself is pivotally mounted on the hull and is held against movement in the aft direction by the rigid restraining means.
  • the supporting structure may, however, be omitted and the forward strut pivoted directly on the hull and held by the restraining means.
  • the aft strut is directly supported on the hull and when moved to the extended position for foil-borne operation, it is locked in that position by similar rigid restraining means.
  • the restraining means for both forward and aft struts is a substantially rigid structure or device which supports the strut in position against the forces encountered during normal operation. If an impact force, or a force in excess of the normal load, is applied to this device, however, it is adapted to yield and permit pivotal movement in the aft direction.
  • the yieldable restraining means or device may be of any suitable type. Thus it may be designed simply to rupture and release the strut entirely, or it may include an energy absorbing means which absorbs the impact energy while permitting the strut to move at a limited or controlled rate.
  • the strut is permitted to swing in the aft direction in response to the impact force and thus reduce the abrupt deceleration which would otherwise occur, so that the craft can slow and settle onto the water at a safe rate of deceleration.
  • the yieldable restraining means thus functions as a mechanical fuse device since it provides a'predetermined failure path and permits the strut to move from its normal position by rupturing or failing in 5 predetermined manner. The mechanical failure is thus confined to aneasily replaceable element or device and any other structural damage is prevented or minimized.
  • FIG. 1 is a perspective view of a typical hydrofoil craft in which the invention may be utilized;
  • FIG. 2 is a view in side elevation, and partially in longitudinal section, of the bow portion of a hydrofoil craft showing the support of the forward strut;
  • FIG. 3 is a side elevation on a larger scale of the upper part of the forward strut and its support
  • FIG. 4 is a view in front elevation of the structure shown in FIG. 3;
  • FIG. 5 is a perspective view of an alternative form of restraining means
  • FIG. 6 is a somewhat diagrammatic view similar to FIG. 1 showing an alternative mounting for the forward strut
  • FIG. 7 is a view in side elevation, and partially in longitudinal section, of the stern portion of a hydrofoil craft showing the support of the aft strut;
  • FIG. 8 is a side elevation on a larger scale of the upper part of the aft strut and its support.
  • FIG. 9 is a view substantially on the line IXIX of FIG. 8.
  • the invention is shown in an illustrative embodiment in a hydrofoil craft 10 which may be of any desired construction.
  • the craft 10 has a hull structure 12 of any suitable or usual design and is provided with a superstructure of any desired type which will not be described in detail as it is not a part of the invention.
  • the hydrofoil 10 is provided with forward and aft foils which are carried on struts attached to the hull 12.
  • a forward strut 14 is provided at the bow of the craft and carries a forward foil 16 of usual type which preferably has control surfaces 18 pivotally attached thereto.
  • An aft center strut 20 is attached to the hull 12 at the stern portion thereof and carries an aft foil 22 of usual type which is provided with control surfaces 24 pivotally mounted thereon.
  • Aft outboard struts 26 are preferably also provided, only the starboard outboard strut being visible in FIG. 1.
  • the outboard struts are pivotally mounted on the hull 12 to support the outer ends of the aft foil 22 but all control and actuating equipment is carried on the center strut and the outboard struts 26 merely pivot with the center strut.
  • the center strut 20 may include a water intake 28 which is part of a conventional propulsion system for use during foil-borne operation.
  • the struts 14 and 20 are shown in FIG. 1 in their extended position for foil-borne operation, in which the foils move through the water and develop sufficient lift to support the hull 12 at a desired distance above the water.
  • the control surfaces 18 and 24 are utilized to control the position and motion of the craft, and the forward strut 14 is preferably also rotatable about its vertical axis to serve as a rudder.
  • the struts l4 and 20 are moved to retracted positions so that the hull l2 floats on the water for operation as a conventional ship.
  • the forward strut 14 moves pivotally in the forward direction in a slot or recess in the bow of the craft to the retracted position shown in dot-dash outline in FIG. 2, while the aft strut 20 moves in the aft direction in a recess in the hull to the dot-dash position shown in FIG. 6.
  • a dangerous situation may occur if one of the struts 14, 20 or 26, or one of the foils 16 or 22, should strike a sizable floating or submerged object in the water during operation at high speed in the foil-borne mode.
  • the struts 14 and 20 are supported and held in position in a manner to reduce the danger to passengers and crew and to minimize the risk of damage in this situation.
  • the forward strut and its associated control and actuating equipment are mounted on a support structure 30.
  • the support 30 comprises two side arm members 32 connected by a frame portion 34.
  • the arms 32 are pivotally mounted on pins 36 in brackets 38 attached to the rear wall of a recess 40 in the hull in which the forward strut 14 is movable in the forward and aft directions.
  • the supporting structure 30 is thus rotatable about the pins 36 but is normally held against rotation by a restraining means 42, to be more fully described hereinafter, which connects the support 30 to a bracket 44 attached to the hull 12.
  • the forward strut 14 is supported at its upper end by a yoke member 46 which is pivotally mounted on the arms 32 of the support 30 on pins 48 journaled in bearings of any suitable type in the arms 32.
  • the upper end of the strut 14 is secured to a kingpost member 50 supported within the yoke 46 and rotatable on bearings therein so that the strut 14 is angularly movable about its vertical axis to enable its use as a rudder as previously mentioned.
  • the angular movement of the strut 14 is limited by stops 52 on each side carried on the frame portion 34 of the support 30, and the yoke 46 is connected to the top of the strut 14 by a flexible rubber boot or seal 54 which is sufficiently flexible to permit the limited angular movement of the strut 14.
  • a horizontal cylinder or servomotor 56 is carried on the upper part of the yoke 46 and connected to the kingpost 50 to move it angularly about the vertical axis.
  • a second cylinder or servomotor 58 is mounted on top of the yoke 46 and actuates a linkage indicated at 60 which extends vertically down through the strut 14 to move the control surfaces 18 on the foil 16.
  • the cylinders 56 and 58 are preferably controlled by electrical signals which may be transmitted to them from the cabin of the craft by flexible cables, or any other suitable means, so that there is no direct mechanical connection between the strut 14 with its associated equipment and the hull or other part of the hydrofoil craft.
  • the yoke 46 is pivotally mounted on the support 30 by means of the pins 48.
  • the strut l4 and the yoke 46 comprise a unitary assembly which is pivotally movable between the extended position shown in solid lines in FIG. 2 and the retracted position shown extending forward in dot-dash lines.
  • the actuating means for thus moving the strut 14 between extended and retracted positions may be of any suitable type and is also carried on the support 30.
  • the actuating means may consist of a cylinder or servomotor 62 pivotally attached to an upwardly extending bracket 64 on the yoke 46, so that operation of the cylinder 62 will move the yoke 46 to pivot the strut 14 about the pins 48.
  • the actuating mechanism also includes upper and lower supports 66 and 68 on which the cylinder 62 is supported.
  • the upper supports 66 are pivotally attached at 70 to upward extensions 72 of the arms 32, while the lower support 68 is attached at 73 to a bracket on the support 30.
  • the cylinder 62 may be controlled in any desired manner, as by electrical signals transmitted through a flexible cable, or in any other desired manner not involving a mechanical connection to the hull. Movement of the strut 14 into the extended position may be limited by engagement of the yoke 46 with a fixed stop 74 on the support 30.
  • the support 30 is pivotally mounted at 36 on the hull l2 and is normally held,
  • the member 42 is designed to be a substantially rigid member or device which holds the support 30 and the strut 14 in position and restrains them from movement in the aft direction during normal operation in the foil-borne mode. If the strut 14 should strike a sizable object or obstruction in the water, however, so that a much higher than normal load, or an impact force, is imposed on the structure, the restraining member 42 yields and permits the entire support 30 with the strut 14 to pivot in the aft direction about the pins 36 to a position such as that shown in dotted lines in FIG. 2.
  • any suitable member or device which can be designed to operate in this manner may be utilized, and if desired two members 42 might be used, connected to the side arms 32, for increased stiffness.
  • two members 42 might be used, connected to the side arms 32, for increased stiffness.
  • restraining member 42 takes the form of a mechanical tension link which may be a steel bar of suitable size with pivotal mountings 76 at each end for connection to the bracket 44 and to the support 30, respectively, and with a reduced section 78 which is designed to rupture at a predetermined load. It will be seen that this device will hold the support 30 and strut l4 rigidly in position under normal conditions but when subjected to an impact force, or other load in excess of the force for which it is designed, the member 42 will rupture at the reduced section 78 and release the support 30 so that the support and the strut 14 are free to pivot in the aft direction about the pivot pins 36. This permits the strut to yield upon striking an obstruction and prevents the rapid and dangerous deceleration that would otherwise occur as well as minimizing structural damage to the strut and to the hull.
  • any suitable energy absorbing device may be utilized in place of the mechanical link 42 of FIG. 3.
  • a suitable device 79 is shown, for example, in FIG. 5 and may consist of a steel tube or sleeve 80 having a pivotal connecting means or clevis 81 at one end thereof, with a cylindrical plug or mandrel 82 of larger diameter than the tube 80 mounted on a rod 83 extending through the tube 80 and having a clevis 84 at the other end thereof.
  • the plug 82 is inserted into the tube 80 as shown and the device 79 may be mounted in place of the link 42 of FIG.
  • the device 79 of FIG. 5 constitutes a rigid restraining structure which will hold the support 30 against movement.
  • the'plug 82 When subjected to impact forces, or other loads in excess of the force for which it is designed, the'plug 82 will be drawn into and through the tube 80, stretching and deforming the tube and thus absorbing energy and permitting pivotal movement of the support 30 at a limited and controlled rate. The rate of deceleration resulting from impact of the strut l4.with a floating object is thus limited and controlled and the craft can descend to the hull-borne state in a relatively safe manner.
  • FIG. 6 A somewhat simpler alternative mounting for the forward strut is shown in FIG. 6.
  • the forward strut 14 is supported in the yoke 46 as described above.
  • the yoke 46 is pivotally mounted on pins 85 supported directly in the hull structure 12 on each side of the bow recess 40.
  • the strut 14 is normally held in position by a restraining means 86 which is similar to the device 79 of FIG. 5 but reversed in operation since the device 86 is in compression. That is, the device 86 comprises a steel tube or sleeve 87 with a plug or mandrel 88 of larger diameter inserted in one end of the tube 87.
  • the device 86 is pivotally attached as shown to the yoke 46 and to the hull l2 and normally holds the strut 14 in the position shown.
  • the plug 88 Upon occurrence of impact forces, or other excessive forces on the strut 14, the plug 88 is forced into the tube 87, stretching and deforming the tube and permitting the strut to pivot in the aft direction about the pins 85 at a limited and controlled rate.
  • Any other suitable restraining means may of course be used in place of the device 86.
  • the cylinder 62 which moves the strut 14 between retracted and extended positions is pivotally attached to the hull 12 in the FIG. 6 embodiment.
  • a bell crank 89 is pivotally supported on the pin 85 on one side of the yoke and attached to the cylinder 62 by a pin 90.
  • the bell crank 89 is connected to the yoke 46 for operation by a coupling pin 91 which is engaged to permit the cylinder 62 to move the strut from one position to the other and disengaged when the strut is extended for foil-bome operation.
  • the restraining means 86 is similarly connected at one end by a releasable pin to permit the strut to be moved to the retracted position when desired.
  • Servomotors or other suitable control devices may of course be mounted on the yoke or strut in the manner shown in F IG. 3 for actuating control surfaces.
  • the aft strut 20 is'mounted on the hull 12 in a manner to permit similar operation in case of impact of the strut 20 or of an outboard strut 26 with a sizable object in the water.
  • the strut 20 has an upward extension 92 which is pivotally mounted on the hull structure 12 on a pivot pin 93.
  • the strut 20 is thus pivotally movable in a recess 94 in the stern portion of the hull 12 between the extended position shownin solid lines in FIG. 7 and a retracted position shown in dot-dash lines.
  • a cylinder or servomotor 95 may be mounted on or in the upward extension 92 for operating a linkage indicated at 96 extending through the strut 20 to actuate the control surfaces 24.
  • An actuating cylinder 98 is pivotally attached to the hull structure 12 and connected to a bracket 100 at the upper end of the extension 92 to move the strut 20 about the pivot pin 93 between the extended and retracted positions.
  • the actuator cylinder 98 may be controlled in any usual or desired manner, and is arranged in a known manner to be decoupled from the strut 20 when the strut has been moved to its extended position.
  • the strut 20 is held in the extended position by a restraining means 102 which locks it in place under normal conditions but is adapted to yield and permit move- ,ment of the strut under impact forces.
  • the restraining is held in the extended position by a restraining means 102 which locks it in place under normal conditions but is adapted to yield and permit move- ,ment of the strut under impact forces.
  • FIG. 9 comprises a mechanical link 104 which may be similar to the link 42 of FIG. 3, having a reduced section 105 adapted to rupture ata predetermined load.
  • the link 104 is contained in a semicylindrical housing 106 which extends downward from a bracket 108 attached to the hull 12. The lower end of the housing 106 is attached to the hull at 110.
  • the link 104 is pivotally mounted at 112 in the upper end of the housing 106, while the lower end of the link has a clevis 1 14 adapted to receive a lug 116 extending upward from the strut 20.
  • the lower end of the link 104 is normally attached to the housing 106 by a locking pin 118 which is movable in a housing 120 and is received in a recess 122 in a cut-away portion at the bottom of the housing 106.
  • the pin 1 18 passes through the clevis 114 to position the link 104 and to normally attach the lower end of the link to the housing by engagement of the pin 1 18 in the recess 122.
  • the pin 1 18 also passes through a hole in the lug 116 to lock the lug to the link 104 and housing 106, and the pin 118 is movable in the housing 120 far enough to retract it to allow the lug 116 to move in and out of the clevis 114.
  • the pin 118 is movable by a lever 124 actuated by a cylinder 126 which is controlled from the strut retraction control in any desired manner.
  • the strut 20 can pivot about the pin 93 to or near the full retracted position.
  • the tension link 104 can, of course, be replaced by an energy absorbing means such as that shown in FIG. 5. Under an impact load, such a device will yield sufficiently to allow the pin 118 to slide out of the recess 122 and the energy absorber pivots out of the housing 106 about the pivot 112 and is stretched to control movement of the strut as previously described. If independent aft struts are provided, as previously mentioned, each strut will be mounted on the hull as just described.
  • both the forward and aft struts are mounted and supported in such a manner that they are rigidly held in position under normal conditions for foil-borne operation of the craft.
  • the restraining means will yield and permit the strut to move in the aft direction so that the craft is not brought to an abrupt stop.
  • the extremely high rate of deceleration which would otherwise occur is thus reduced sufficiently to eliminate, or at least greatly reduce, the hazard to passengers and crew on the craft.
  • the aft strut is free to pivot essentially to its normal retracted position so that little structural damage can occur.
  • the restraining means is designed to yield at the desired load to release the strut, a predetermined failure path is built into the structure, and the restraining means acts in effect as a mechanical fuse device which fails under predetermined conditions to protect the structure.
  • the mechanical failure is thus confined to an easily replaceable element or device and any other structural damage is prevented or minimized.
  • a support structure for said forward strut said support structure being pivotally mounted on the hull structure for movement in the aft direction
  • the forward strut being pivotally mounted on the support structure for movement relative to the support structure in the forward direction between a retracted position for hull-borne operation of the craft and an extended position for foil-borne operation
  • said restraining means being a substantially rigid structure adapted to hold the supporting structure against movement under loads below a predetermined value and to yield and permit movement of the support structure and forward strut in response to loads above said value.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Ocean & Marine Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Harvester Elements (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Fluid-Damping Devices (AREA)
  • Body Structure For Vehicles (AREA)
US372235A 1973-06-21 1973-06-21 Safety system for hydrofoil craft Expired - Lifetime US3910215A (en)

Priority Applications (18)

Application Number Priority Date Filing Date Title
US372235A US3910215A (en) 1973-06-21 1973-06-21 Safety system for hydrofoil craft
GB5144473A GB1398668A (en) 1973-06-21 1973-11-06 Safety system for hydrofoil craft
SE7315097A SE405100B (sv) 1973-06-21 1973-11-07 Anordning vid berplansfarkoster
NL7315847A NL7315847A (OSRAM) 1973-06-21 1973-11-19
DE19732359323 DE2359323C3 (de) 1973-06-21 1973-11-26 Sicherheitshalterung für die um eine horizontale Querachse schwenkbaren Stützen eines Tragflügelbootes
DK643973*A DK643973A (OSRAM) 1973-06-21 1973-11-29
BE1005538A BE807949A (fr) 1973-06-21 1973-11-29 Systeme de securite pour hydrofoil
JP48134011A JPS5021488A (OSRAM) 1973-06-21 1973-11-29
IT53983/73A IT997692B (it) 1973-06-21 1973-11-29 Sistema di supporto di sicurezza per montanti porta ali
ES421009A ES421009A1 (es) 1973-06-21 1973-11-30 Perfeccionamientos en embarcaciones de hidroplaneo.
FR7342868A FR2234179B1 (OSRAM) 1973-06-21 1973-11-30
ZA739530A ZA739530B (en) 1973-06-21 1973-12-18 Safety system for hydrofoil craft
AU63798/73A AU6379873A (en) 1973-06-21 1973-12-19 Absorbing impacts to hydrofoils
NO4896/73A NO140371C (no) 1973-06-21 1973-12-20 Sikkerhetsholder for stoetteben for hydrofoilfartoey
CH171474A CH584131A5 (OSRAM) 1973-06-21 1974-02-07
CA192,291A CA988784A (en) 1973-06-21 1974-02-12 Safety system for hydrofoil craft
BR1166/74A BR7401166D0 (pt) 1973-06-21 1974-02-18 Embarcacao com hidrofolios
HK305/76*UA HK30576A (en) 1973-06-21 1976-05-27 Safety system for hydrofoil craft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US372235A US3910215A (en) 1973-06-21 1973-06-21 Safety system for hydrofoil craft

Publications (1)

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US3910215A true US3910215A (en) 1975-10-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
US372235A Expired - Lifetime US3910215A (en) 1973-06-21 1973-06-21 Safety system for hydrofoil craft

Country Status (17)

Country Link
US (1) US3910215A (OSRAM)
JP (1) JPS5021488A (OSRAM)
AU (1) AU6379873A (OSRAM)
BE (1) BE807949A (OSRAM)
BR (1) BR7401166D0 (OSRAM)
CA (1) CA988784A (OSRAM)
CH (1) CH584131A5 (OSRAM)
DK (1) DK643973A (OSRAM)
ES (1) ES421009A1 (OSRAM)
FR (1) FR2234179B1 (OSRAM)
GB (1) GB1398668A (OSRAM)
HK (1) HK30576A (OSRAM)
IT (1) IT997692B (OSRAM)
NL (1) NL7315847A (OSRAM)
NO (1) NO140371C (OSRAM)
SE (1) SE405100B (OSRAM)
ZA (1) ZA739530B (OSRAM)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4010705A (en) * 1975-10-06 1977-03-08 John Bradford Connell Rotational energy absorber apparatus for hydrofoil craft strut
US4086012A (en) * 1976-09-20 1978-04-25 The United States Of America As Represented By The Secretary Of The Navy Rotational energy absorbing coupling
US4364324A (en) * 1981-04-29 1982-12-21 The Boeing Company Strut release mechanism for hydrofoil craft
US4936240A (en) * 1988-02-09 1990-06-26 Yamaha Hatsudoki Kabushiki Kaisha Structure for holding underwater projections
US4962718A (en) * 1988-04-27 1990-10-16 Westfoil International Hydrofoil propulsion system
US5008863A (en) * 1979-06-04 1991-04-16 The United States Of America As Represented By The Secretary Of The Navy Low noise sonar support system
US5018686A (en) * 1988-08-26 1991-05-28 Dornier Luftfahrt Gmbh Hydrodynamic lift for flying boats or sea planes
US5152705A (en) * 1991-12-27 1992-10-06 Rock Frederick N Flow actuated fin system for water sport boards and the like
US7020044B1 (en) 2004-10-08 2006-03-28 The United States Of America As Represented By The Secretary Of The Navy Apparatus for producing gaseous vapor baffle
US20080063500A1 (en) * 2006-09-08 2008-03-13 Mikko Niinisto Break away mechanism for a liftgate parting bar
EP2322420A1 (fr) * 2009-11-17 2011-05-18 Eca Véhicule naval de surface à bras instrumenté pivotant.
WO2012021941A1 (en) * 2010-08-20 2012-02-23 Concepts Ip Pty Ltd Hydrofoil
WO2022019764A2 (en) 2020-07-24 2022-01-27 Edorado B.V. Safety strut assembly for hydrofoil craft
WO2022250777A1 (en) * 2021-05-28 2022-12-01 Foil Ferry, LLC Collision system for foiling watercraft
CN118083065A (zh) * 2024-04-23 2024-05-28 威海德创船舶技术有限公司 一种船舶用防撞式安全气囊
WO2025105964A1 (en) * 2023-11-15 2025-05-22 Lift Ocean As Hydrofoil assembly

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5532137B1 (OSRAM) * 1976-03-25 1980-08-22
JPS5783414A (en) * 1980-11-12 1982-05-25 Ishikawajima Kenzai Kogyo Kk Manufacture of porous block
JPS58224715A (ja) * 1982-06-24 1983-12-27 旭化成株式会社 平打軽量気泡コンクリ−ト版の製造方法
GB9112508D0 (en) * 1991-06-11 1991-07-31 Duncan Ian J Wind powered or assisted hydrofoil craft
JP6934494B2 (ja) * 2019-08-05 2021-09-15 三菱重工業株式会社 水中翼船

Citations (8)

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US2795202A (en) * 1954-08-18 1957-06-11 Hook Christopher Hydrofoil craft
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Cited By (23)

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Publication number Priority date Publication date Assignee Title
US4010705A (en) * 1975-10-06 1977-03-08 John Bradford Connell Rotational energy absorber apparatus for hydrofoil craft strut
US4086012A (en) * 1976-09-20 1978-04-25 The United States Of America As Represented By The Secretary Of The Navy Rotational energy absorbing coupling
US5008863A (en) * 1979-06-04 1991-04-16 The United States Of America As Represented By The Secretary Of The Navy Low noise sonar support system
US4364324A (en) * 1981-04-29 1982-12-21 The Boeing Company Strut release mechanism for hydrofoil craft
US4936240A (en) * 1988-02-09 1990-06-26 Yamaha Hatsudoki Kabushiki Kaisha Structure for holding underwater projections
US4962718A (en) * 1988-04-27 1990-10-16 Westfoil International Hydrofoil propulsion system
US5018686A (en) * 1988-08-26 1991-05-28 Dornier Luftfahrt Gmbh Hydrodynamic lift for flying boats or sea planes
US5152705A (en) * 1991-12-27 1992-10-06 Rock Frederick N Flow actuated fin system for water sport boards and the like
US7020044B1 (en) 2004-10-08 2006-03-28 The United States Of America As Represented By The Secretary Of The Navy Apparatus for producing gaseous vapor baffle
US20080063500A1 (en) * 2006-09-08 2008-03-13 Mikko Niinisto Break away mechanism for a liftgate parting bar
EP2322420A1 (fr) * 2009-11-17 2011-05-18 Eca Véhicule naval de surface à bras instrumenté pivotant.
WO2012021941A1 (en) * 2010-08-20 2012-02-23 Concepts Ip Pty Ltd Hydrofoil
US8893640B2 (en) 2010-08-20 2014-11-25 Concepts Ip Pty Ltd Hydrofoil
AU2011291449B2 (en) * 2010-08-20 2015-07-02 Concepts Ip Pty Ltd Hydrofoil
WO2022019764A2 (en) 2020-07-24 2022-01-27 Edorado B.V. Safety strut assembly for hydrofoil craft
NL2026134B1 (en) 2020-07-24 2022-03-28 Edorado B V Safety strut assembly for hydrofoil craft
US20230257073A1 (en) * 2020-07-24 2023-08-17 Edorado B.V. Safety strut assembly for hydrofoil craft
US12528561B2 (en) * 2020-07-24 2026-01-20 Edorado B.V. Safety strut assembly for hydrofoil craft
WO2022250777A1 (en) * 2021-05-28 2022-12-01 Foil Ferry, LLC Collision system for foiling watercraft
US20220379998A1 (en) * 2021-05-28 2022-12-01 Foil Ferry, LLC Collision system for foiling watercraft
US11691695B2 (en) * 2021-05-28 2023-07-04 Foil Ferry, LLC Collision system for foiling watercraft
WO2025105964A1 (en) * 2023-11-15 2025-05-22 Lift Ocean As Hydrofoil assembly
CN118083065A (zh) * 2024-04-23 2024-05-28 威海德创船舶技术有限公司 一种船舶用防撞式安全气囊

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DK643973A (OSRAM) 1975-02-17
AU6379873A (en) 1975-06-19
DE2359323B2 (de) 1976-10-21
ES421009A1 (es) 1976-05-01
FR2234179B1 (OSRAM) 1977-08-05
NO489673L (OSRAM) 1975-01-20
FR2234179A1 (OSRAM) 1975-01-17
CH584131A5 (OSRAM) 1977-01-31
BR7401166D0 (pt) 1974-11-05
SE405100B (sv) 1978-11-20
GB1398668A (en) 1975-06-25
NO140371C (no) 1979-08-22
HK30576A (en) 1976-06-04
NO140371B (no) 1979-05-14
SE7315097L (OSRAM) 1974-12-23
IT997692B (it) 1975-12-30
DE2359323A1 (de) 1975-01-09
ZA739530B (en) 1974-11-27
CA988784A (en) 1976-05-11
JPS5021488A (OSRAM) 1975-03-07
BE807949A (fr) 1974-05-29
NL7315847A (OSRAM) 1974-12-24

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