Propulsion device
Jan 15, 2016 The differences in elevation and salinity ratios between these two seas cause strong marine currents. Depending on the morphology of the canal the speed of the flow varies and at some specific locations the energy intensity reaches to sufficient levels where electricity generation by marine current turbines becomes economically feasible.
Download PDFInfo
- Publication number
- US3556039A US3556039AUS779465AUS3556039DAUS3556039AUS 3556039 AUS3556039 AUS 3556039AUS 779465 AUS779465 AUS 779465AUS 3556039D AUS3556039D AUS 3556039DAUS 3556039 AUS3556039 AUS 3556039A
- Authority
- US
- United States
- Prior art keywords
- displacement means
- combination according
- Albert P Sfredda
- Original Assignee
- Application filed by Albert P SfreddafiledPriority to US77946568ApriorityApplication grantedgrantedPublication of US3556039ApublicationAnticipated expirationlegal-statusApplication status is Expired - Lifetimelegal-status238000006073displacementMethods0claims229910001868waterInorganic materials0claims7
- claims
239000003570airSubstances0description13- claims
238000006243chemical reactionMethods0description2- claims
239000000463materialsSubstances0description2- description
2- description
1- description
1- description
1- description
1- description
1- description
1- description1
Images
Classifications
- B--PERFORMING OPERATIONS; TRANSPORTING
- B63H--MARINE PROPULSION OR STEERING
- B63H16/08--Other apparatus for converting muscle power into propulsive effort
- B63--SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H11/00--Effecting propulsion by jets, i.e. reaction principle
- B63H11/04--Effecting propulsion by jets, i.e. reaction principle the propulsive medium being ambient water by means of pumps
- B--PERFORMING OPERATIONS; TRANSPORTING
- B63H--MARINE PROPULSION OR STEERING
- B63H25/46--Steering or dynamic anchoring by jets or by rudders carrying jets
Abstract
A manually powered and/or motorized fluid reaction propulsion device having fluid receiving chambers with fluid displacement mechanisms connected to the upper portions of the chambers for effecting a continuous intake and thrust-producing expulsion of sea water through openings in the rear ends of the chambers.Description
United States Patent Albert P. Si'redda 2106 Iris Place, Bethlehem, Pa. 18018 779,465Nov. 27, 1968 Jan. 19, 1971 lnventor Appl. No. Filed Patented PROPULSION DEVICE 7 Claims, 4 Drawing Figs.US. Cl 115/14 [56] References Cited UNlTED STATES PATENTS 2,983,244 5/1961 Young 115 11 Primary Examiner-Trygve, M. Blix ABSTRACT: A manually powered and/or motorized fluid reaction propulsion device having fluid receiving chambers with fluid displacement mechanisms connected to the upper portions of the chambers for effecting a continuous intake and thrust-producing expulsion of sea water through openings in the rear ends of the chambers.. l PROPULSION DEVlCE SUMMARY OF THE INVENTION This invention relates to propulsion devices for watercraft and is especially concerned with a propulsion device generally of the fluid reaction type.An object of the present invention is to provide a propulsion device that is simple in construction, This device can be powered and steered by physically operating foot pedals that are connected to fluid displacement means. Auxiliary motorized drive mechanism is also provided. 7.Another object is to provide vent mechanisms for controlling fluid flow through the propulsion system. thereby controlling steering and the general motion of the propelled watercraft.Other more specificobjects and advantages will be apparent from the following description of an'illustrative embodiment of the present invention.BRIEF DESCRIPTION OF THE DRAWINGS DISCLOSURE OF THE EMBODIMENT Referring to FIGS. 1. 2. and 3 of the drawings. the propulsion mechanism is shown mounted on a flat bottomed boat. however this system isusable on other types of watercraft. A pair of chambers 2 and 3 are secured to rear section of boat 1. Bellows 4 and 5 are secured to the upper forward ends of the chambers. The rear portions of the chambers extend through transom I7 and have openings 14 and 15 that are generally.disposed below the water line [6. Bellows 4 and 5 are shown as fluid displacement means, however other suitable displacement means may be employed. Bellows 4 and 5 are disposed generally above water line 16, so that the upper portions of the chambers will contain trapped air. Air vents II and 12 are disposed near upper portions of bellows. Suitable valves may be employed for opening and closing the vents. Drive motor 10 has cranks 8 and 9 disposed at opposite ends of the motor shafts. The cranks are connected to the bellows 4 and 5. with pins 18 and 19. Cranks may be disengaged and foot pedals 6 and 7, mounted to bellows, may be employed for expanding and compressing bellows. Bellows can be expanded by the buoyant force of sea water. IRefer particularly to FIG. 2. In operation. by depressing bellows 4. either physically by foot pedal 6. or by motorized crank 8, will force trapped air 20 in upper section of chamber outward from position to position 31. as indicated by dotted line. The air in turn forces contained sea water out of the chamber through opening '14, thereby producing thrust. The return stroke of crank 8 expands bellows 4. This action plus the buoyant force produced by the sea water displaces trapped air to its original position and refills chamber with sea water to position 30. Expansion spring 33 assists the expansion of the bellows. One end of the spring is secured to bellows foot pedal 6 and the other end to chamber 2. Vents I1 and 12 may be employed for steering. For example'if vent I1 is covered by hand or closed by a suitable valve and vent 12 is open, power actuation of bellows 4 will force air in and out of open vent and will not expel thrust-producing sea water from chamber 2. If vent 11 on chamber 3 is closed, power actuation of bellows 5 will displace air rearwardly and force the expulsion of thrustproducing sea water through opening IS. The fact that chamber 3 is disposed on right side of boat 1, the thrust from chamber 3 will encourage a left turn. Vents are not necessary if the boat is constructed solely for manual operation. Steering may be accomplished simply by pumping one bellows faster than the other. The propulsion mechanism is shown mounted generally inside a watercraft. however it may be mounted completely or partially exterior to a watercraft.Conventional fluid deflector means may be employed to deflect expelled sea water forward to thereby propel the craft in reverse.FIG. 4 shows a modification of the present invention. The fluid receiving chamber 34 is mounted generally below the water line 29 of boat 21 and is filled with sea water. The rear portion of the chamber extends through the rear bottom section of the boat and has an opening 23 communicating with the sea. Diaphragm 28 is secured to and communicates with chamber 34. Slide rod 25. supported by support 35. is secured to the diaphragm at one end. and the other end is secured to cam follower 26. which engages cam 27. Cam is so shaped that rotation of cam, by motor 32. forces the rod and diaphragm rearward to expel thrust-producing sea water at a velocity three times higher than the return velocity on the intake stroke. The forward movement of rod and diaphragm plus the buoyant force of sea water effects the refill of chamber 34 without nullifying the forward movement of the boat.It will be obvious to those skilled in the art that many variations may be made in the embodiments chosen for the purpose of illustrating the present invention without departing from the scope thereof as defined in the appended claims.Iclaim:1. In combination. a boat hull, a propulsion device mounted in said hull. said propulsion device comprising a pair of chambers disposed generally parallel to each other. and having happed fluid therein. each chamber having a portion extending through said hull and having an opening communicating with the sea, mechanical displacement means connected to each chamber, a foot pedal with a means for actuating each displacement means, each foot pedal being independently operable, whereby continuous physical operation of said foot pedals effects a continuous intake and expulsion of thrustproducing sea water through said openings, by moving said trapped fluid in and out of said displacement means.2. The combination according to claim 1. each chamber is provided with an extended portion for containing trapped air whereby continuous internal displacement of said air by said displacement means. effects a continuous intake and expulsion of thrust-producing sea water through said opening.3. The combination according to claim 2. each said extended portion is provided with an air vent and means for opening and closing said vents.4. The combination according to claim I. wherein the buoyant force of seawater solely effects the filling of said chambers with sea water and the expansion of said displacement means.5. The combination according to claim I, wherein spring means assist the expansion of said displacement means.6. The combination according to claim I, wherein displacement means are generally composed of a flexible material whereby the displacement means are capable of expansion as a result of the buoyant force produced by sea water.7. The combination according to claim I, mechanical means for driving saiddisplacement means, drive means inelude means for imparting irregular actuation of said displacement means. whereby the intake velocity of sea water in said chambers is slower than the expulsion velocity.Claims (7)
1. In combination, a boat hull, a propulsion device mounted in said hull, said propulsion device comprising a pair of chambers disposed generally parallel to each other, and having happed fluid therein, each chamber having a portion extending through said hull and having an opening communicating with the sea, mechanical displacement means connected to each chamber, a foot pedal with a means for actuating each displacement means, each foot pedal being independently operable, whereby continuous physical operation of said foot pedals effects a continuous intake and expulsion of thrust-producing sea water through said openings, by moving said trapped fluid in and out of said displacement means.2. The combination according to claim 1, each chamber is provided with an extended portion for containing trapped air whereby continuous internal displacement of said air by said displacement means, effects a continuous intake and expulsion of thrust-producing sea water through said opening.3. The combination according to claim 2, each said extended portion is provided with an air vent and means for opening and closing said vents.4. The combination according to claim 1, wherein the buoyant force of sea water solely effects the filling of said chambers with sea water and the expansion of said displacement means.5. The combination according to claim 1, wherein spring means assist the expansion of said displacement means.6. The combination according to claim 1, wherein displacement means are generally composed of a flexible material whereby the displacement means are capable of expansion as a result of the buoyant force produced by sea water.7. The combination according to claim 1, mechanical means for driving said displacement means, drive means include means for imparting irregular actuation of said displacement means, whereby the intake velocity of sea water in said chambers is slower than the expulsion velocity.US779465A1968-11-271968-11-27Propulsion device Expired - LifetimeUS3556039A (en) Priority Applications (1)
Application Number Priority Date Filing Date Title US3556039AtrueUS3556039A (en) 1971-01-19 ID=25116533
Family Applications (1)
Application Number Title Priority Date Filing Date US (1) US3556039A (en) Cited By (8)
* Cited by examiner, † Cited by third party Publication number Priority date Publication date Assignee Title US5267883A (en) * 1991-12-18 1993-12-07 Gudmundsen Richard A Internal water-jet boat propulsion system US6142234A (en) * 1998-03-16 2000-11-07 Jack Crain Apparatus and method for tieback of subsea wells US20040121662A1 (en) * 2002-12-18 2004-06-24 Hassan Ahmed A. Method and device for low-noise underwater propulsion WO2008024077A1 (en) * 2006-08-23 2008-02-28 Chye Hee Chua Hydro-propulsion device Citations (1)
* Cited by examiner, † Cited by third party Publication number Priority date Publication date Assignee Title 1968 US2983244A (en) * 1960-04-22 1961-05-09 Richard S Young Jet propelled play boat
Cited By (10)
* Cited by examiner, † Cited by third party Publication number Priority date Publication date Assignee Title US5267883A (en) * 1991-12-18 1993-12-07 Gudmundsen Richard A Internal water-jet boat propulsion system US6142234A (en) * 1998-03-16 2000-11-07 Jack Crain Apparatus and method for tieback of subsea wells US20040121662A1 (en) * 2002-12-18 2004-06-24 Hassan Ahmed A. Method and device for low-noise underwater propulsion US6860770B2 (en) * 2002-12-18 2005-03-01 The Boeing Company Method and device for low-noise underwater propulsion and for reducing hull drag WO2008024077A1 (en) * 2006-08-23 2008-02-28 Chye Hee Chua Hydro-propulsion device Similar Documents
Publication Publication Date Title US3369518A (en) Aquatic vehicle US3027860A (en) Anti-friction hull US5460551A (en) Pedal-powered kayak US3092060A (en) Flying submarine JPH0794235B2 (en) Watercraft and a driving mechanism DK146360B (en) Propelled to the ships or other vessels and of the kind having at least one pivotable blade, is subjected to a reciprocating movement in the vertical direction US3154043A (en) Hydrodynamic travelling wave propulsion apparatus US20160052610A1 (en) Fin For Oscillating Foil Propulsion System US3204596A (en) Hydroglider US3823847A (en) Water cannon US3085447A (en) Single stick boat control EP1814780B1 (en) Device for moving an object in relation to a fluid
![Hassan Hassan](/uploads/1/2/5/8/125859468/302639081.jpg)