Abstract: A hydraulic axial piston machine includes a drive shaft, a swashplate pivotable about a pivot axis to change inclination relative to a drive shaft axis, and an actuating piston approximately parallel to the drive shaft axis. The actuating piston has a first end which engages and adjusts the swashplate and a second end which bounds an actuating chamber. Fluid flows to the actuating chamber to pivot the swashplate one direction and is forced out of the actuating chamber when the swashplate pivots the other direction. A return element on the actuating piston incorporates a position of the actuating piston and thus the inclination of the swashplate into a control valve. The return element is positioned such that its longitudinal axis and an actuating piston longitudinal axis span a plane that differs from a plane perpendicular to the pivot axis.

Abstract: A rotary cylinder apparatus which prevents a fluid from leaking from a contact portion of a piston and a cylinder member and consequently enables efficient rotation. The rotary cylinder apparatus comprises: a rotary cylinder member 2 which has cylinder chambers 22 and 23 formed thereto so as to pass through a rotary shaft center O and rotates around the rotary shaft center O; pistons 3 and 4 demonstrating reciprocating linear motion in the cylinder chambers 22 and 23; a piston holding member 5 which holds the pistons 3 and 4 and rotates around a rotation center X eccentric from the rotary shaft center O of the rotary cylinder member 2; and a casing 6 which rotatably supports the rotary cylinder member 2 and has at least one inlet 61 and at least one outlet 62, wherein the pistons 3 and 4 are rotatably supported at a position away from the rotation center X of the piston holding member 5 by a fixed distance and with that position at the center thereof.

Abstract: A hydraulic power system having first and second hydraulic power converters in which the speed of the second power converter is proportional to the speed of the first power converter. The first hydraulic power converter includes a plurality of hydraulic power producing elements. At least one of the power producing elements provides power for power driving, and at least one of the power producing elements pumps hydraulic fluid. The hydraulic fluid is connected to and drives the second hydraulic power converter at a speed proportional to the speed of the first power converter.

Abstract: A variable-stroke crank mechanism includes a crankshaft rotatably mounted in a casing and having an eccentric crankpin, and a plurality of fluid pressure actuators disposed substantially radially with respect to the crankshaft, for pressing the eccentric crankpin to rotate the main shaft and the casing relatively to each other. The fluid pressure actuators are selectively supplied with a working fluid. An eccentric collar is rotatably mounted on the crankpin and operatively coupled to the fluid pressure actuators. The eccentric collar having an axis which is eccentrically displaced with respect to the axis of the crankpin. The crankpin and the eccentric collar are arrested in their respective angular positions by intermeshing internal and external gears. The crank mechanism may be incorporated in a plunger-type hydraulic unit, which may also be incorporated in a hydromechanical continuously variable transmission.

Abstract: In a valveless pump, a pump body, having a central chamber, is provided with a radially disposed array of pistons movable toward and away from the axis of the pump body. Cylinder heads cooperate with the pistons in controlling fluid movement through the pump. A drive shaft extends axially into the pump chamber and includes a surrounding eccentric cam. A linkage assembly pivotally connects the inward end portions of the several pistons with a tether ring surrounding the drive shaft for maintaining the pistons in contact with the eccentric cam and reciprocating the pistons in sequence for moving fluid through conduits sequentially communicating with the several piston cylinders.

Abstract: A hydraulic pump/motor in which working piston elements are arranged for radial reciprocation. A cam is arranged eccentrically to a rotor which carries the pistons. Fluid cavities are provided in feet on the pistons, in the faces of a polygon to which the feet are attacahed, and in bearing pads in the outer ends of the cylinders to provide hydrostatic balancing. The pistons are hollow and are equipped with check valves to prevent centrifugal force from expelling fluid from the polygon and foot cavities. The cam includes mating spherical surfaces which compensate for bending forces applied to the cam. An improved mechanism for adjusting the cam position uses inherent forces to eliminate the need for a power assist device for cam adjustment. Port plates on opposite sides of the rotor provide inlet to the unit near the axis of the unit and outlet near the outer edge to alleviate stresses and increase efficiency.

Abstract: The device permits dosing a secondary fluid in a principal fluid and comprises a body (1) in which is provided a passageway (20) for the circulation of the principal fluid and having an inlet orifice (22) and distribution orifices (23) for the fluid, which distribution orifices open onto a cylindrical chamber (3) defined by a housing (2), the chamber (3) containing means (39, 16, 19, 27, 28, 30) for driving a pump (36) of the secondary fluid which comprise three pistons (30) mounted on radial rods (16) pivotally mounted on an arm (15) of a crank (39) adapted to drive in alternating translation a dosing piston (35) of the pump (36). Each piston (30) is slidable in a cylinder (28) pivotally mounted on a pin (40). This measuring-dosing device delivers additive in proportion to the rate of flow of the principal fluid in synchronism with the crank (39) and without the use of any spring.

Abstract: A compressed fluid reciprocating piston engine provides for cylinders radially disposed about a crankshaft and coupled thereto by means of piston rods engaging a disc rotatable with the crankshaft. Exhaust fluid feedback is merged into higher pressure fuel at a venturi throat section in the fuel conveyance line where the pressures are temporarily substantially equalized. A timer distributor mechanism consists of a disc rotatable by a shaft as journalled between two outer panels thereby with a rotating aperture hole to provide pressurized fluid through a scanned sequence of outlet lines serving to operate fluid input valves coupling a fluid pressure source selectively to power the reciprocating pistons.

Abstract: A reversible motor includes a rectilinear shaft (1) having peripherally arranged semi-spherical cavities (24) each engaging the ball-appendage (25) of a radial cylinder (21). A related piston (28) reciprocates axially within each cylinder chamber (27) and is also furnished with a ball-appendage (29) connected within a spherical socket (30) located in a traverse (31). The traverse joins two discs (32 and 33) together whose inner cylindrical surfaces rotatably surround a pair of stationary eccentric rings (38) rotatably engaging the shaft (1). The shaft rotates by means of a drive hub connected to the actual shaft and having arms (42) in contact with a recess (43) formed in the rotating discs (33). A roller wheel (45) protruding laterally from each of the radial arms into the recess (43) transmits rotation to the drive hub.

Abstract: Improved energy translation devices, such as fluid motors or pumps of the type including an orbiter member operatively coupled between a stator and a rotor, are disclosed which include an individually pressure compensated valving arrangement, telescopically interfitted piston elements having spherical, pressure loaded sealing ends, and a unique counterbalancing mechanism. The valving arrangement has a pair of intercommunicated, freely laterally movable valve bodies adjacent each fluid displacement piston assembly and respectively on opposite sides of the orbiter; each body includes especially designed, opposed fluid chambers therein for receiving pressurized fluid and individually urging each pair of bodies toward the central orbiter to establish a sliding seal with the orbiter and a desired amount of lubricating leakage of fluid adjacent the valve bodies.

Abstract: Disclosed is a rotary engine comprising a rotor, a plurality of pistons angularly mounted in the rotor, an actuator mounted for eccentric rotation relative to the axis of rotation of the rotor, a blower, a transverse actuator pin connecting each piston to the actuator, and a plurality of fixed pins connecting the rotor to the actuator. The fixed pins are mounted on the rotor, pass through clearance holes in a rotor disc which acts as a blower, and carry extension gears which mate with internal gears mounted in the actuator. Accordingly, rotation of the rotor causes rotation of the blower and of the actuator.

Abstract: There is a fluid rotary machine having radial pistons and a shaft with an eccentric cam having a rotational movement relative to the housing. The cam mounts a ring on the exterior thereof and the pistons abut against the exterior surface of the ring with each piston mounted for sliding movement in the interior of the cylinder. The ring is associated with the distribution of the fluid of the machine to the pistons and cylinders. Means are provided to immobilize the ring against rotation relative to the housing and subjugate the ring to an essentially circular translation movement relative to the rotational movement of the eccentric cam on which the ring is mounted, and is characterized by the fact that the means for maintaining the ring in such a position comprises a plurality of elastic members connecting predetermined points of the ring to anchor points unassociated with the ring.

Abstract: The engine comprises a base having a spool fastened thereon, the spool including a hub symmetrical about a first axis and having a pair of side plates normal to and having inside faces spaced apart along the first axis. There are plate ports in the inside faces. A cylinder rotor includes a second hub rotatable on the first hub about the first axis and includes a pair of side discs normal to the first axis and having outside faces spaced apart axially between said side plates to establish first and second axial clearances between the side plates and the adjacent side discs. There are cylinders mounted radially on the cylinder rotor with ducts extending from the cylinders to the disc ports in the outside faces radially opposite the plate ports. A driven shaft symmetrical about a second axis is eccentrically journalled in and extends through the hub. A rotor is fast on the driven shaft and carries pivot pins.

Abstract: The present invention comprises a fluid pump motor unit and a controller unit which controls the output of the pump/motor irrespective of the speed of the power source driving the pump/motor unit.The pump/motor unit comprises a cylindrical housing within which there is arranged at least one rectangular expansible cylinder assembly mounted on a crankshaft in a radial pattern, the cylindrical assembly being pivotally mounted within the housing for movement about trunnions, the rectangularly adapted piston assembly within said housing being journaled on a crankshaft which crankshaft with respect to the centerline of the cylindrical housing has a rotation parallel to, but spaced from, the centerline of the housing. The pivotal oscillation of each cylinder assembly alternately opens a port for the inflow of a fluid and subsequently closes that port while simultaneously opening another port for the outward flow of the fluid under compression as the piston moves toward the top of the chambers.

Abstract: A fluid pump or motor is disclosed having a housing with a central opening in one side thereof and containing fluid inlet and outlet ports in which one portion of the housing includes a slipper bearing formed in the end opposite the central opening where the axes of the slipper bearing and central opening are in eccentric alignment with a shaft rotatably supported within the central opening of the housing where piston means for operating in a cylinder has the end nearest the center of the shaft with a segment of circular cross-section slot formed therein, the axis of which is parallel to the axis of the shaft with a slipper of substantially circular cross-section nested in the slot of each piston with the slipper extending beyond the walls of each piston in reduced radial configuration and working with a rotor having a plurality of radially arranged cylinders, each cylinder having a port at the outer end thereof and having the walls of each cylinder nearest the center of the rotor containing a dome shaped voi

Abstract: A radial type hydraulic pump motor according to the present invention has pistons, each of which is formed at its head portion with a concave or convex spherical surface. Engaged spherically with said spherical surface head portion is a piston shoe whose outer planar portion is slidably engaged with the inner planar portion of a crescent-shaped segment arcuately engaged with the inner peripheral surface of a drum case. Said piston shoe is formed at its outer planar portion with a hydraulic recess equal to the effective pressure receiving area of piston in area. Said recess is maintained in communication with a cylinder chamber. Accordingly, said spherically engaging portion and arcuately engaging portion make little sliding movements and only the outer planar portion of piston shoe and the inner planar portion of segment mutually make sliding movement under little contact pressure, thereby causing little wear to said engaging portion and sliding portion.