Патент USA US3074697код для вставки
Jan. 22, 1963 H. A. GARRlsoN ETAL 3,074,687 REVERSIBLE HYDRAULIC RowER UNIT Y. Filed Oct. 28. 1960 2 Sheets-Sheet 2 FLUID RESERVOIR 34 /30 54 /30 20 ..32 28/ 36 INVENTORS HARRY A. GARRISON GARRISON E. MURPHY JOHN E. MURPHY Fig. By 14:11.01 8¢ 16101 United States Patent 0 ” CC 3,d74,637 Patented Jan. 22, 1953 1 2 3,074,687 of a 'foroid to conform closely to the curved wall of the toroidal chamber on one side of the piston. A similar REVERSÈBLE HYDRAULÍC PGWER UNH’ Harry A. Garrison, 5309 Marlborough Drive, San Diego, Calif.; Garrison E. Murphy, 650 Cabriilo Ave., Coro nado, Calif.; and John E. Murphy, S309 Marlborough Drive, San Diego, Calif. Filed Get. 28, i966, Ser. No. 65,847 2 Claims. (El. 253-23) baffle 36 extends from the face 30 of each piston on the diametrically opposite side from the baille 34, and the two bañles constitute opposed, scoop-like extensions of the pistons. The disc 20 is iixed to the'shaft 22 by a spline 38, or similar means, for a direct driving connection. For con venience the housing 10 is made in two halves, divided The present invention relates generally to hydraulic 10 diametrically on the center line normal to the axis of shaft 22, the halves 40 and 42 having radially projecting, motors and more particularly to a reversible hydraulic paired lugs 44 which are secured together by bolts 46 power unit. and nuts 48. The primary object of this invention is to provide a The housing 'l1-alf 40 is provided with a iluid inlet port hydraulic power unit utilizing a unitary rotating member having a plurality of piston-like elements driven by lluid 15 `50 angularly disposed on the side of the toroidal chamber 12 to direct fluid inwardly and circumferentially against pressure in a toroidal chamber, the rotation being smooth the face 28 and baille 34 of each piston. The housing and continuous and the speed being fully vari-able by con half 42 has a fluid outlet port 52 of the toroidal cham trolling the ll-uid pressure. ber 12 and circumferentially spaced from the inlet 50. Another object of this invention is to provide a hy draulic power unit in which the piston-like elements are 20 The terms inlet and outlet are arbitrary and relative since the power unit is reversible by reversing the fluid llow, double sided, so that the rotating member and power out the original outlet then becoming the inlet. Fluid leak put shaft can be driven in either direction with equal age inwardly toward the hub ld is prevented by means eñiciency. of 4annular sealing rings 54 recessed into the radical walls Another object of this invention is to provide a hy draulic'power unit in which the piston-like elements have 25 16 inwardly of the toroidal chamber 12, said sealing rings riding on and sealing against the opposite faces of extended baffles to form pockets into which the hydraulic the disc 20. lluid is directed for maximum driving force. ' The power unit is driven by pressurized lluid, a typical A further object of this invention is to provide a hy draulic power unit which can be used as a motor, power transmission, or other device for converting fluid pres sure into rotary power. arrangement being illustrated diagrammatically in FIG. 30 4. A conventional type of pump 56 pumps fluid from a reservoir 5S, through a reversing valve 6d, to the inlet port Si?, the lluid returning from outlet port 52, through Finally, it is an object to provide a hydraulic power the valve, to said reservoir. Any suitable power source unit of the aforementioned character which is simple and can be used to drive the pump 56. The fluid entering convenient to manufacture and use and which will give 35 the inlet port Sti exerts pressure against the face 28 of generally efllcient and durable service. the adjacent piston 26, the scoop effect of the baffle 34 With these and other objects definitely in view, this in greatly increasing the driving power of the lluid. As vention consists in the novel construction, combination each piston 26 advances beyond the outlet port 52 the and arrangement of elements and portions, as will be fluid escapes, the actual separation between inlet and out hereinafter fully described in the specifications, particu larly pointed out in the claims, `and illustrated in the 40 let being determined by the lluid pressure and llow rate, the circumferential dimension and relative extent of each drawings, which form a material part of this disclosure, piston and other design factors in the engine. Also the and in which: angle of the inlet and outlet and the exact configuration FIG. l is a front elevation view of the power unit with of the bailles 34 and 36 will be determined by the particu' one portion of the housing removed; FIG. 2 is a sectional view taken on the line 2-2 of 45 lar flow characteristics. Since the pistons are dou-ble ended, the rotor lâ will be driven in either direction with EFIG. l; equal eilîciency, rotational speed being controlled vir FIG. 3 is an enlarged fragmentary perspective view of tually entirely by fluid llow rate, such as by a regulating a portion of the rotor and drive shaft; and valve. FIG. 4 is a fragmentary sectional view taken on the The power unit can be used for many different pur line d-d of FIG. 1, with the associated hydraulic system 50 poses, a particularly useful application being in the prime shown diagrammatically. Similar characters of reference indicate similar or iden tical elements and portions throughout the specifications and throughout the views of the drawing. The power unit comprises a housing 1d having an outer toroidal chamber l2 and a central hub ld connected to the toroidal chamber by spaced radial walls 16. Within the housing l@ is a rotor 18 comprising a disc `2li mounted on a shaft 22, which is freely rotatable in bearings 2d in the hub lli, the periphery of said disc carrying a plurality of piston-like elements which will be referred to herein simply as pistons 26 which are circumferentially spaced and rotate in the toroidal chamber l2. Each piston 26 is double sided, having opposed radial faces I28 and Sii extending diametrically to the cross section of the toroi dal chamber l2, and each piston is provided with a pis ton ring 32, or multiple rings, for proper sealing. Each piston 26 has 4a baille 3d» integral therewith, extending circumferentially from the face 28 on one side of and generally circumferentially of the disc 20 and having a curved edge extending from the outer edge of said face to the periphery of said baille being substantially a portion mover of a vehicle. A single power unit can be used in place of the usual transmission and coupled to the driving Wheels by >a differential gearbox. Alternatively, a separate unit may be attached to or built into the hub of each driven wheel. Since the speed is infinitely vari able throughout the designed operating range, no gears are necessary, the throttle control being -a simple valve. An electric motor or internal combustion engine may be used to drive the pump 56 and, if necessary, a pressurized fluid reservoir can be used to provide emergency power in the event of engine failure. The power unit is a smoothly operating driving means having a higher efficiency than the conventional vane or gear type hydraulic motors. The single rotating corn ponent, the rotor 1S, may be made as a unitary structure, together with the pistons and ballles, reducing the total number of parts to -a minimum. By using piston rings on each piston, the fit of the pistons and bailles within the toroidal chamber is far less critical, the machining oper ations involved being greatly simplified. Since no high temperatures are involved and wear is 3,074,687 3 4 , limited to the contact surfaces of the piston rings 32 and posed to direct pressurized fluid against each piston and sealing -rings 54», the majorA portion of the structure may be of light alloy material. The drive portion of the unit is self-lubricating, the toroidal housing being iilled with the working fluid while in operation. The operationof this invention willrbe clearly compre hended from ,a consideration of the foregoing description of the mechanical details thereof, taken in connection with the drawings and the Iabove recited objects. It will be obvious that all said objects are amply achieved by this invention. It is understood that minor variation from the form of baffles, in one direction, as said rotor disc rotates; said bañies being portions of .a toroid and conforming closely to the inner surface of said toroidal chamber; and said housing having annular sealing rings therein engaging the opposite faces'of said rotor disc radially inwardly of said pistons. 2. A hydraulic power unit according to claim 1 and wherein said major portion of the distance is substantially 10 one-'half of the distance between adjacent pistons. References Cited in the ñle of this patent the invention disclosed herein may be made without de parture from the spirit and scope of the invention, and that the specifications and drawings are to be considered 15 as merely lillustrative rather than limiting. UNITED STATES PATENTS 364,363 Messer ______________ _- June 7, 1887 517,981 624,349 Lucas _______________ __ Apr. 10, 1894 Lighthall ____________ __ May 2, 1899 1, A hydraulic power unit, comprising: a housing hav ing a toroidal chamber; a rotor disc freely rotatably mounted in said housing; said rotor disc having a plu 800,684 845,762 1,045,204 Schneider _____________ __ Oct. 3, 1905 Crary __'_____________ __ `Mar. 5, 1907 Simons _____________ __ Nov. 26, 1912 rality of circnmferentially spaced pistons extending sub 1,142,726 2,977,091 Phillips ______________ „_ June 8,v 1915 Geppert ____________ __ Mar. 28, 1961 294,831 Switzerland _____ __'..___ Nov. 30, 1953 We claim: _ stantially radially therefrom and fitting closely inÍsaid toroidal chamber, each of said pistons being double sided and having opposed, substantially iiat faces; bañies integral with said pistons and extending circumferentially 25 a major portion of the dist-ance between adjacent pistons and extending from said opposed -faces on diametrically opposite sides of each piston; said toroidal housing havin-g ì a pair of Huid conducting ports circumferentially spaced FOREIGN PATENTS OTHER REFERENCES “The American Inventor,” April 1906,7‘vol. 15,` No. 4, on opposite sides thereof; each of said ports being dis 30' page 101.