US2520804A - Watercraft with pivoted flappers - Google Patents

Watercraft with pivoted flappers Download PDF

Info

Publication number
US2520804A
US2520804A US793690A US79369047A US2520804A US 2520804 A US2520804 A US 2520804A US 793690 A US793690 A US 793690A US 79369047 A US79369047 A US 79369047A US 2520804 A US2520804 A US 2520804A
Authority
US
United States
Prior art keywords
flappers
pivoted
watercraft
supported
platform
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
US793690A
Inventor
Oliver A Hollar
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to US793690A priority Critical patent/US2520804A/en
Application granted granted Critical
Publication of US2520804A publication Critical patent/US2520804A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B63H—MARINE PROPULSION OR STEERING
    • B63H16/00—Marine propulsion by muscle power
    • B63H16/08—Other apparatus for converting muscle power into propulsive effort
    • 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
    • B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
    • B63B1/12—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly
    • B63B1/125—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly comprising more than two hulls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H19/00—Marine propulsion not otherwise provided for
    • B63H19/02—Marine propulsion not otherwise provided for by using energy derived from movement of ambient water, e.g. from rolling or pitching of vessels
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T70/00—Maritime or waterways transport
    • Y02T70/50—Measures to reduce greenhouse gas emissions related to the propulsion system
    • Y02T70/5218—Less carbon-intensive fuels, e.g. natural gas, biofuels
    • Y02T70/5236—Renewable or hybrid-electric solutions

Definitions

  • N TED TATES PATENT LOFFICEA A g 2,520,8041] a WATERCRAFT WITH VPIVOTED FLAPPERS v Oliver A.' Hollar., Hanfo -d, Calif.
  • "Al l l tea er 24,weasel-a1ivmeaceoj f The present invention relates to new and useful improvements in water craft for supporting a singleperson and more particularly to means for propelling the-water craft by a rocking movement thereof.
  • An important object of the invention is to provide a readily rockable water craft having pivoted paddles r flappers at each side thereof arranged to cause a forward propelling movement of the water craft when the same is rocked from side to side by the occupant.
  • Another object of the invention is to provide a water craft for supporting a person in a standing position thereon to effectively cause a propelling movement thereof and to also provide means for steering the water craft.
  • a still further object is to provide a device of this character of simple and practical construction, which is efficient and reliable in operation,
  • Figure 6 is an enlarged vertical sectional view of one of the flapper supports taken substantially on the line 66 of Figure 2.
  • the numeral 5 designates the central main pontoon or float for the boat or water craft on which is supported front and rear upright frames 6 and 1 extending outwardly at opposite sides of the central pontoon and having a platform 8 supported on the top of the frames.
  • the sides of the frames 6 and I are provided with brackets 9 on which relatively small balancing pontoons or outriggers ID are supported, the balancing pontoons being positioned outwardly at each side of the central pontoon 5 and parallel thereto.
  • the axis of the pontoons 5 and ID are coplanar to normally support the platform 8 in 1 Claim. (01. 115 1) a horizontal position above the surface'of the water.'
  • a plate H is secured in an upright position at thelower side edges of -the front and rear frames 6 and 1 and from which a pin l2 projects' outwardly in a slightly downwardly'inclined position.
  • a substantially flat hollow flapper l3 of substantially air-foil construction is provided with a bearing or bushing I4 extending transversely thereof and pivotally supported on the pin l2.
  • the flapper is secured in position on the pin by a nut l5 threaded on the outer end thereof to provide a vertical swinging movement of the flapper.
  • the flapper is pivoted slightly forwardly of its center to provide a relatively longer trailing edge l6.
  • a hollow steering post I9 is suitably supported in an upright position at a front edg of the platform 8 and in which a steering shaft 20 is rotatably supported with a handle 2
  • the rear ends of the cables are attached to steering arms 24 extend-- ing oppositely at the upper end of a rudder post 25 journalled in a supporting bracket 26 extending rearwardly from the central pontoon 5.
  • the rudder post 25 carries a rudder 21.
  • a water craft comprising a main central pontoon, a frame supported thereon, a platform-supported on the frame, outrigger pontoons at'e'ach side of the central pontoon and carried'by the frame, said frame including a lower frame structure positioned outwardly at opposite sides of the central pontoon and below the center thereof to support said lower frame structure submerged, horizontal pins projecting outwardly at each side Ofthe lower frame structure, rigid flappers of airfoil construction rockably supported forwardly of their centers on said pins for vertical swinging movement of the trailing edges of the flappers to propel the water craft by rocking movement of the platform, and stop pins carried by the lower frame structure above and below the trailing edges of the fiappers to limit swinging movement thereof.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

Description

Aug. 29, 1950 o. A. HOLLAR 2,520,304
WATERCRAFT WITH PIVOTED FLAPPERS Filed Dec. 24, 1947 2 Sheets-Sheet 1 Fig. l.
Oliver A Hal/0r INVENTOR.
0. A. HOLLAR WATERCRAFT WITH PIVOTED FLAPPERS 2 Sheets-Sheet 2 Filed Dec. 24, 1947 Oliver A. Hal/0r I INVENTOR.
BY mlywyvm Patented Aug. 29,1950 .4
. N TED TATES PATENT LOFFICEA A g 2,520,8041], a WATERCRAFT WITH VPIVOTED FLAPPERS v Oliver A.' Hollar., Hanfo -d, Calif. "Al l l tea er 24,weasel-a1ivmeaceoj f The present invention relates to new and useful improvements in water craft for supporting a singleperson and more particularly to means for propelling the-water craft by a rocking movement thereof.
An important object of the invention is to provide a readily rockable water craft having pivoted paddles r flappers at each side thereof arranged to cause a forward propelling movement of the water craft when the same is rocked from side to side by the occupant.
Another object of the invention is to provide a water craft for supporting a person in a standing position thereon to effectively cause a propelling movement thereof and to also provide means for steering the water craft.
A still further object is to provide a device of this character of simple and practical construction, which is efficient and reliable in operation,
relatively inexpensive to manufacture and other sectional view of the steering post taken substantially on the line 5 of Figure 3, and
Figure 6 is an enlarged vertical sectional view of one of the flapper supports taken substantially on the line 66 of Figure 2.
Referring now to the. drawings in detail wherein for the purpose of illustration I have disclosed a preferred embodiment of the invention the numeral 5 designates the central main pontoon or float for the boat or water craft on which is supported front and rear upright frames 6 and 1 extending outwardly at opposite sides of the central pontoon and having a platform 8 supported on the top of the frames.
The sides of the frames 6 and I are provided with brackets 9 on which relatively small balancing pontoons or outriggers ID are supported, the balancing pontoons being positioned outwardly at each side of the central pontoon 5 and parallel thereto. The axis of the pontoons 5 and ID are coplanar to normally support the platform 8 in 1 Claim. (01. 115 1) a horizontal position above the surface'of the water.'
A plate H is secured in an upright position at thelower side edges of -the front and rear frames 6 and 1 and from which a pin l2 projects' outwardly in a slightly downwardly'inclined position. A substantially flat hollow flapper l3 of substantially air-foil construction is provided with a bearing or bushing I4 extending transversely thereof and pivotally supported on the pin l2. The flapper is secured in position on the pin by a nut l5 threaded on the outer end thereof to provide a vertical swinging movement of the flapper. The flapper is pivoted slightly forwardly of its center to provide a relatively longer trailing edge l6.
Upper and lower stop pins l1 and I8 project outwardly from the plate H between which the trailing edge I6 of the flapper is vertically swingable, the stops limiting the upward and downward swinging movement of the flapper. A hollow steering post I9 is suitably supported in an upright position at a front edg of the platform 8 and in which a steering shaft 20 is rotatably supported with a handle 2| at its upper end and oppositely extending arms 22 at its lower end and to which the front ends of cords or steering cables 23 are attached. The rear ends of the cables are attached to steering arms 24 extend-- ing oppositely at the upper end of a rudder post 25 journalled in a supporting bracket 26 extending rearwardly from the central pontoon 5. The rudder post 25 carries a rudder 21.
In the operation of the device a person is supported in a standing position on the platform 8 to impart a rocking movement to the boat whereby to raise and lower the flappers [3 in v the water. The flappers being pivoted forwardly of their centers and the pivotal movement of the flappers being limited by the upper and lower stops I! and I8 will result in relatively short strokes of the flappers to change from an upwardly to a downwardly inclined position by an opposite tilting movement of the platform. The initial upward or downward movement of one side of the platform will quickly swing the rear end of the flappers at that side upwardly or downwardly into an inclined position and are held in that position by the stops, and the continued movement of that side of the platform in the same direction will maintain the flappers in the inclined position, such as shown in Figure 4, and will tend to force the water under the flappers rearwardly and thus move the device forwardly. This action will occur when the flappers are inclined upwardly as well as downwardly.
In view of the foregoing description taken in conjunction with theraccompanying drawings it is believed that a clear understanding of the device will be quite apparent to those skilled in this art. A more detailed description is accordingly deemed unnecessary.
It is-to be understood, however, that even though there is herein shown and described a preferredembodiment of the invention the same is susceptible to certain changes fully comprehended by the spirit of the invention as herein described and the scope of the appended claim; 1
Having described the invention, what is claimed as new is:
A water craft comprising a main central pontoon, a frame supported thereon, a platform-supported on the frame, outrigger pontoons at'e'ach side of the central pontoon and carried'by the frame, said frame including a lower frame structure positioned outwardly at opposite sides of the central pontoon and below the center thereof to support said lower frame structure submerged, horizontal pins projecting outwardly at each side Ofthe lower frame structure, rigid flappers of airfoil construction rockably supported forwardly of their centers on said pins for vertical swinging movement of the trailing edges of the flappers to propel the water craft by rocking movement of the platform, and stop pins carried by the lower frame structure above and below the trailing edges of the fiappers to limit swinging movement thereof.
OLIVER A. HOLLAR.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 22,097 Vrooman 1 Nov. 16, 1858 603,469 Kautz May 3, 1898 1,006,118 Napier Oct. 1'7, 1911 1,093,196 Lombardi Apr. 14, 1914 1,723,213 Smith Aug. 6, 1929 2,021,815 Strout Nov. 19, 19 5 2,226,911 Romano -1--- Dec. 31, 1940 FOREIGN PATENTS- umber Country Date 746 Great Britain 1903
US793690A 1947-12-24 1947-12-24 Watercraft with pivoted flappers Expired - Lifetime US2520804A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US793690A US2520804A (en) 1947-12-24 1947-12-24 Watercraft with pivoted flappers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US793690A US2520804A (en) 1947-12-24 1947-12-24 Watercraft with pivoted flappers

Publications (1)

Publication Number Publication Date
US2520804A true US2520804A (en) 1950-08-29

Family

ID=25160552

Family Applications (1)

Application Number Title Priority Date Filing Date
US793690A Expired - Lifetime US2520804A (en) 1947-12-24 1947-12-24 Watercraft with pivoted flappers

Country Status (1)

Country Link
US (1) US2520804A (en)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2996034A (en) * 1958-04-17 1961-08-15 Jonsson Karl-Erik Arnold Device for propelling and stabilizing of boats
US3002484A (en) * 1958-04-24 1961-10-03 Alfred T Dube Boat
US3004510A (en) * 1958-08-13 1961-10-17 Nawara Jozef Ship stabilizers
US4332571A (en) * 1977-11-11 1982-06-01 Einar Jakobsen Wave motors
US4371347A (en) * 1979-04-04 1983-02-01 Einar Jakobsen Wave motor, especially for propulsion of boats
US4576580A (en) * 1984-08-10 1986-03-18 Gulko Arnold G Pedal powered watercraft
US20040102107A1 (en) * 2002-11-22 2004-05-27 Gorshkov Vladislav Vasilyevich Wave powered propulsion systems for submarines and quasi-dipped watercrafts
US7371136B2 (en) 2006-01-20 2008-05-13 Liquid Robotics Inc. Wave power
WO2008109002A2 (en) 2007-03-02 2008-09-12 Liquid Robotics Incorporated Wave power
WO2012126009A2 (en) 2011-03-17 2012-09-20 Liquid Robotics, Inc. Wave-powered devices configured for nesting
WO2012126012A2 (en) 2011-03-17 2012-09-20 Liquid Robotics, Inc. Wave-powered device with one or more tethers having one or more rigid sections
US8376790B2 (en) 2006-01-20 2013-02-19 Liquid Robotics Inc. Wave power
US8717844B2 (en) 2010-02-23 2014-05-06 Westerngeco L.L.C. Seismic data acquisition using self-propelled underwater vehicles
US8808041B2 (en) 2011-06-28 2014-08-19 Liquid Robotics, Inc. Watercraft that harvest both locomotive thrust and electrical power from wave motion
US8825241B2 (en) 2011-03-17 2014-09-02 Liquid Robotics, Inc. Autonomous wave-powered substance distribution vessels for fertilizing plankton, feeding fish, and sequestering carbon from the atmosphere
WO2014145601A2 (en) 2013-03-15 2014-09-18 Liquid Robotics, Inc. Adaptable modular power system (amps) and dedicated connector; modular payload boxes and autonomous water vehicle configured to accept same
US8944866B2 (en) 2011-09-15 2015-02-03 Liquid Robotics, Inc. Wave-powered endurance extension module for unmanned underwater vehicles
US9524646B2 (en) 2011-03-17 2016-12-20 Liquid Robotics, Inc. Navigation of a fleet of autonomous vessels in current and wind
US9533740B2 (en) 2013-03-15 2017-01-03 Liquid Robotics, Inc. Adaptable modular power system (AMPS)
US20190009874A1 (en) * 2015-08-21 2019-01-10 Cetus Technology Ltd Device for linear propulsion

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US22097A (en) * 1858-11-16 Ship-buildihg
US603469A (en) * 1898-05-03 Joseph kautz
GB190300746A (en) * 1903-01-12 1903-12-03 William Cochrane Improvements in and relating to the Propelling and Steering Mechanism of Ships and Boats, more especially of the Submarine Type.
US1006118A (en) * 1910-09-01 1911-10-17 George R Napier Propelling apparatus for boats.
US1093196A (en) * 1913-08-23 1914-04-14 Joseph Lombardi Catamaran.
US1723213A (en) * 1928-03-19 1929-08-06 Bergen Point Iron Works Raft of floating pontoons
US2021815A (en) * 1934-09-06 1935-11-19 Ray D Strout Marine propulsion
US2226911A (en) * 1938-06-22 1940-12-31 Romano Joseph Tilting raft

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US22097A (en) * 1858-11-16 Ship-buildihg
US603469A (en) * 1898-05-03 Joseph kautz
GB190300746A (en) * 1903-01-12 1903-12-03 William Cochrane Improvements in and relating to the Propelling and Steering Mechanism of Ships and Boats, more especially of the Submarine Type.
US1006118A (en) * 1910-09-01 1911-10-17 George R Napier Propelling apparatus for boats.
US1093196A (en) * 1913-08-23 1914-04-14 Joseph Lombardi Catamaran.
US1723213A (en) * 1928-03-19 1929-08-06 Bergen Point Iron Works Raft of floating pontoons
US2021815A (en) * 1934-09-06 1935-11-19 Ray D Strout Marine propulsion
US2226911A (en) * 1938-06-22 1940-12-31 Romano Joseph Tilting raft

Cited By (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2996034A (en) * 1958-04-17 1961-08-15 Jonsson Karl-Erik Arnold Device for propelling and stabilizing of boats
US3002484A (en) * 1958-04-24 1961-10-03 Alfred T Dube Boat
US3004510A (en) * 1958-08-13 1961-10-17 Nawara Jozef Ship stabilizers
US4332571A (en) * 1977-11-11 1982-06-01 Einar Jakobsen Wave motors
US4371347A (en) * 1979-04-04 1983-02-01 Einar Jakobsen Wave motor, especially for propulsion of boats
US4576580A (en) * 1984-08-10 1986-03-18 Gulko Arnold G Pedal powered watercraft
US20040102107A1 (en) * 2002-11-22 2004-05-27 Gorshkov Vladislav Vasilyevich Wave powered propulsion systems for submarines and quasi-dipped watercrafts
US7371136B2 (en) 2006-01-20 2008-05-13 Liquid Robotics Inc. Wave power
US20080188150A1 (en) * 2006-01-20 2008-08-07 Hine Roger G Wave power components
US10150545B2 (en) 2006-01-20 2018-12-11 Liquid Robotics, Inc. Wave power
US20080299843A1 (en) * 2006-01-20 2008-12-04 Hine Roger G Wave power vehicle tethers
US7641524B2 (en) 2006-01-20 2010-01-05 Liquid Robotics Inc. Wave power vehicle tethers
US8376790B2 (en) 2006-01-20 2013-02-19 Liquid Robotics Inc. Wave power
US9623945B2 (en) 2006-01-20 2017-04-18 Liquid Robotics Inc. Wave power
US9051037B2 (en) 2006-01-20 2015-06-09 Liquid Robotics, Inc. Wave power
US8287323B2 (en) 2006-01-20 2012-10-16 Liquid Robotics, Inc Wave power components
US10041466B2 (en) 2006-05-18 2018-08-07 Liquid Robotics, Inc. Wave-powered devices configured for nesting
US9151267B2 (en) 2006-05-18 2015-10-06 Liquid Robotics, Inc. Wave-powered devices configured for nesting
US10315746B2 (en) 2007-03-02 2019-06-11 Liquid Robotics, Inc. Cable for connecting a float to a swimmer in a wave powered vehicle
US9789944B2 (en) 2007-03-02 2017-10-17 Liquid Robotics, Inc. Cable for connecting a float to a swimmer in a wave powered vehicle
US8668534B2 (en) 2007-03-02 2014-03-11 Liquid Robotics, Inc Wave power
US11685494B2 (en) 2007-03-02 2023-06-27 Liquid Robotics, Inc. Method and apparatus for untwisting a tether of a water powered vehicle
US20100190394A1 (en) * 2007-03-02 2010-07-29 Hine Roger G Wave power
US11027810B2 (en) 2007-03-02 2021-06-08 Liquid Robotics, Inc. Float for connection to a swimmer in a wave powered vehicle
EP3514050A1 (en) 2007-03-02 2019-07-24 Liquid Robotics, Inc. Wave power
WO2008109002A2 (en) 2007-03-02 2008-09-12 Liquid Robotics Incorporated Wave power
US9575198B2 (en) 2010-02-23 2017-02-21 Westerngeco L.L.C. Seismic data acquisition using self-propelled underwater vehicles
US8717844B2 (en) 2010-02-23 2014-05-06 Westerngeco L.L.C. Seismic data acquisition using self-propelled underwater vehicles
US9524646B2 (en) 2011-03-17 2016-12-20 Liquid Robotics, Inc. Navigation of a fleet of autonomous vessels in current and wind
WO2012126012A2 (en) 2011-03-17 2012-09-20 Liquid Robotics, Inc. Wave-powered device with one or more tethers having one or more rigid sections
US8825241B2 (en) 2011-03-17 2014-09-02 Liquid Robotics, Inc. Autonomous wave-powered substance distribution vessels for fertilizing plankton, feeding fish, and sequestering carbon from the atmosphere
WO2012126009A2 (en) 2011-03-17 2012-09-20 Liquid Robotics, Inc. Wave-powered devices configured for nesting
US8764498B2 (en) 2011-03-17 2014-07-01 Liquid Robotics, Inc. Wave-powered device with one or more tethers having one or more rigid sections
US9802681B1 (en) 2011-03-17 2017-10-31 Liquid Robotics, Inc. Autonomous wave-powered vessels and fleets for managing fish stock
EP3267275A1 (en) 2011-03-17 2018-01-10 Liquid Robotics, Inc. Wave-powered devices configured for nesting
US9688373B2 (en) 2011-06-28 2017-06-27 Liquid Robotics, Inc. Watercraft equipped with a wave-powered electricity generating system and a deployable tow buoy
US10150546B2 (en) 2011-06-28 2018-12-11 Liquid Robotics, Inc. Watercraft equipped with a hybrid wave-powered electricity generating and propulsion system
US9353725B2 (en) 2011-06-28 2016-05-31 Liquid Robotics, Inc. Watercraft and electricity generator system for harvesting electrical power from wave motion
US10549832B2 (en) 2011-06-28 2020-02-04 Liquid Robotics, Inc. Watercraft equipped with a hybrid wave-powered electricity generating and propulsion system
US11192621B2 (en) 2011-06-28 2021-12-07 Liquid Robotics, Inc. Watercraft and electricity generator system for harvesting electrical power for wave motion
US8808041B2 (en) 2011-06-28 2014-08-19 Liquid Robotics, Inc. Watercraft that harvest both locomotive thrust and electrical power from wave motion
US8944866B2 (en) 2011-09-15 2015-02-03 Liquid Robotics, Inc. Wave-powered endurance extension module for unmanned underwater vehicles
US10005535B2 (en) 2013-03-15 2018-06-26 Liquid Robotics, Inc. Adaptable modular power system (AMPS) and dedicated connector; modular payload boxes and autonomous water vehicle configured to accept same
US9533740B2 (en) 2013-03-15 2017-01-03 Liquid Robotics, Inc. Adaptable modular power system (AMPS)
US10913523B2 (en) 2013-03-15 2021-02-09 Liquid Robotics, Inc. Adaptable modular power system (AMPS) and dedicated connector; modular payload boxes and autonomous water vehicle configured to accept same
WO2014145601A2 (en) 2013-03-15 2014-09-18 Liquid Robotics, Inc. Adaptable modular power system (amps) and dedicated connector; modular payload boxes and autonomous water vehicle configured to accept same
US20190009874A1 (en) * 2015-08-21 2019-01-10 Cetus Technology Ltd Device for linear propulsion
US10858086B2 (en) * 2015-08-21 2020-12-08 Cetus Technology Ltd Device for linear propulsion

Similar Documents

Publication Publication Date Title
US2520804A (en) Watercraft with pivoted flappers
US3841251A (en) Sailboat
US3084355A (en) Swimming aid
US3885512A (en) Catamaran structure
US3566819A (en) Sailing craft
US3208422A (en) Boat construction
US2816521A (en) Power boat stabilizing device
US3045264A (en) Water sleds
US3179078A (en) Dual hydrofoil mechanism for sailboats
US3459146A (en) Hydrofoil watercraft
US3884172A (en) Hydroplane boat
US2643628A (en) Sailboat construction
US3286673A (en) Hydrofoil stabilizing means for watercraft
US3110283A (en) Boat propulsion and steering device
US4164909A (en) Wind driven hydrofoil watercraft
US2126665A (en) Rig for sailboats and vessels
US3336890A (en) Keel structure
US3001499A (en) Rear mounted planing and stabilizing structure for power boats
US3786774A (en) Airboat
US2726624A (en) Means for propelling a rowboat
US1344225A (en) Water-skate
US2530718A (en) Hull form for speedboats
GB700771A (en) Improvements in or relating to sailing craft
US1237715A (en) Adjustable water-planing surface.
US3606859A (en) Aquatic vehicle