Abstract: A rotary fluid pressure device is disclosed of the type including a gerotor gear set including a ring member (19) and a star member (23). Both manifold valving and commutator valving are accomplished at an interface between an end surface (42) of the star (23) and an end surface (41) of an endcap member (17). The endcap (17) defines three concentric pressure chambers (43), (51) and (47), and the star defines three concentric manifold zones (63), (67), and (65) which are in continuous communication with the pressure chambers (43), (51) and (47), respectively. The various manifold zones (63), (67), and (65) defined by the star communicate with fluid ports (69), (77) and (73), respectively which are also defined by the end surface (b 42) of the star (23).

Abstract: A vane compressor comprising a rotor eccentrically arranged in a cylindrical housing and vanes, which define a space between the periphery of the rotor and the inner surface of the housing. The volume of the space varies during the rotation of the rotor due to the eccentricity of the rotor. The rotor (14) comprises inlet valves (19, 23) arranged between the inlet (12) of the compressor and the space (46) in order to open when the pressure in the space (46) is below the pressure at the inlet (12) in order to suck in air inside the space (46) during the intake stroke of the rotor. Moreover, the rotor comprises outlet valves (20, 24) arranged between the space and the outlet (48) of the compressor and adapted to open when the pressure in the space (46) exceeds the counter-pressure at the outlet (48) during the compression stroke.

Abstract: A ring and star type gear set is disclosed with recessed passages 32 that serve to communicate the fluid chambers about the line of eccentricity.

Abstract: A hydraulic torque motor and more particularly a hydraulic torque motor 10 of the internally generated rotor family having a rotatable inner rotor 24 and an orbital outer rotor 26 and which includes an improved rotary valve means 66 for the delivery and exhaust of hydraulic pressure fluid thereto and therefrom.

Abstract: A gerotor type star and ring gear machine in which control orifices in the star gear alternatively register with ports in the end wall. The star gear is formed from a series of plates and has two sets of control orifices formed therein with one set being diametrically opposed to the second set.

Abstract: A rotary fluid pressure device is disclosed comprising a housing having fluid inlet and outlet means and enclosing a gerotor having an internally toothed member and a coacting externally toothed member having a less number of teeth than the internally toothed member and having its axis positioned eccentrically relative to the axis of the internally toothed member. A wobble stick in the housing has a first end connected to the axial drive shaft and a second end connected to the gerotor member having the orbital movement. The housing has one set of passageways communicating at all times with the expanding and contracting gerotor cells. The gerotor member having orbital movement is, in addition to its usual function, a valve with two travel passageways, one travel passageway coaxially surrounding the other passageway.

Abstract: A rotary engine, either prime mover--or pump or compressor--comprises as its basic element a circular casing in which is journalled rotatably a hollow, cylindrical body, the interior wall face of which ascribes a space delimited by recesses alternating with portions extending towards the center of the space, each recessed portion being diametrically opposite an inwardly extending portion, a solid cylindrical body being positioned within the space, a throughgoing bore extending across the axis of the solid cylindrical body in which bore a piston like member can perform a reciprocal movement. In the case of an internal combustion engine explosion and expansion occur in the space within the hollow cylindrical body and cause it to rotate: rotative movement is derived from a shaft of the body. A drive could be applied to the shaft so that a fluid could be compressed in the space. In use as a pump the fluid to be conveyed is sucked into the working space and expelled therefrom.

Abstract: A planetary hydraulic motor comprises a stator gear (1) having arranged inside thereof a rotor (3), and cover plates (5 and 6) adjacent to end faces of the rotor (3) and the stator gear (1). Rigidly secured to the stator gear (1) is one end of an arm (7) the other end of which is secured by means of a hinged joint to a housing (9) of an actuating mechanism, the rotor (3) being mounted directly on a drive shaft (10) of the actuating mechanism.

Abstract: The invention relates to a fluid pressure operated motor or pump of the type having a gerotor displacement mechanism which normally includes inner and outer wheel and ring gears which in operation have relative rotational and orbital movement therebetween. Such devices inherently have a form of valving wherein, with a commutating type of action, fluid is directed from the casing inlet to expanding chambers of the gerotor and directed from collapsing gerotor chambers to the casing outlet. Two embodiments are presented in which the first has the casing thereof fixed in space. In both units the commutator valving includes valving patterns in two valve plates attached to opposite sides of the casing and in the wheel gear which has orbital movement relative to the casing.

Abstract: Torque-amplifying servomechanism particularly for use in motor vehicle power steering systems, having the advantage of occupying less space in the axial sense;The device provided by the invention is made up by the association of a hydraulic motor of the vane type and a rotary piston, known per se and secondly, a fluid distributor of the valve spool type said spool being arranged actually inside the body of the rotary piston.

Abstract: A power plant including a vane type engine having fuel compression means and a gas expansion means. Air or an air-fuel mixture compressed by the vanes in the compression means is fed to a free piston combustion member where burning takes place and gases are returned to the gas expansion means of the engine to drive the power shaft.

Abstract: A device for lubricating a rotary piston air pump driven by an engine penetrated by lubricating oil return conduits. The device includes a rotary housing including a casing and two side walls and rotatably mounted on a stationary axle having an eccentric thereon. The axle penetrates the housing perpendicular with respect to the side walls and receives on its eccentric a rotating piston, which is in camming engagement with the casing and limits volume changing operating chambers. The surface of the eccentric on which the piston is mounted is provided with a recess in communication with a suction conduit and a recess in communication with a discharge conduit. The piston has control openings for successively communicating the recesses with the operating chambers during rotary movement of the piston.

Abstract: The hydraulic internal gear machine includes a positive displacement unit for the working fluid, the unit being formed of a rotary outer gear which is rigidly connected to a rotary control plate provided with control openings arranged between respective teeth of the outer gear. An inner gear surrounds the outer gear and meshes at one point with the latter to define a plurality of increasing fluid displacement chambers. The inner gear is supported in the machine housing for performing a circular wobbling movement about the center axis of the outer gear. A stationary control plate adjoins the rotary control plate and is provided with second control openings cooperating with the first control openings in the rotary plate. An axially movable plunger is spring-biased against the stationary control plate and forms with the housing cover two annular spaces connected respectively to the intake port and to the discharge port of the working fluid.

Abstract: A rotary fluid pressure device is disclosed comprising a housing having fluid inlet and outlet means and enclosing a gerotor having an internally toothed member and a coacting externally toothed member having a less number of teeth than the internally toothed member and having its axis positioned eccentrically relative to the axis of the internally toothed member. A wobble stick in the housing has a first end connected to the axial drive shaft and a second end connected to the gerotor member having the orbital movement. The housing has one set of passageways communicating at all times with the expanding and contracting gerotor cells. The gerotor member having orbital movement is, in addition to its usual function, a valve with two travel passageways, one travel passageway extending straight through the rotor and coaxially surrounding the other travel passageway.

Abstract: A linearly driven rotary actuator has a tool or implement attached to the end of the output shaft. Various fluid lines are provided to drive the tool or implement as required. To prevent twisting and wrapping of fluid lines around the actuator, a rotary fluid coupling is provided as an integral part of the actuator housing.

Abstract: The invention relates to a fluid pressure operated motor or pump of the type having a gerotor displacement mechanism which normally includes inner and outer wheel and ring gears which in operation have relative rotational and orbital movement therebetween. Such devices inherently have a form of valving wherein, with a commutating type of action, fluid is directed from the casing inlet to expanding chambers of the gerotor and directed from collapsing gerotor chambers to the casing outlet. In the unit herein the commutator valving includes two valve plates attached to opposite sides of the orbiting and rotating wheel gear which have the commutating action with the surrounding stationary ring gear.

Abstract: A gerotor machine has a housing and a displacement unit in the housing. The displacement unit includes an inner gear wheel rotatable about an axis, and an outer gear wheel which has an axis circularly displaceable about the axis of rotation of the inner gear wheel. The gear wheels bound a plurality of displacement chambers therebetween. A plurality of recesses are formed between the teeth of one of the gear wheels, and each of the recesses has two circumferentially spaced control edges at one axial end of the one gear. The housing is provided with a plurality of control openings which are located relative to the axis of the one gear at a radial distance corresponding to that of the recesses. The control edges of the recesses of the one gear cooperate with the control openings of the housing and are operative for communicating the control openings with the chambers of the displacement unit.

Abstract: A rotary piston machine is shown that is operable with a compressible fluid; such as a rotary pump, compressor or engine construction. There is a housing having an inner and an outer ring member that are rotatably mounted on a common axis. The outer ring has at least two diametrically opposed inwardly directed segmental pistons. The inner ring has at least two diametrically opposed outwardly directed segmental pistons so as to define working chambers therebetween. An oscillating coupling means is positioned within the inner ring and flexibly joined to both ring members as well as rotating around a fixed offset crankpin to cause the inner and outer pistons to change position with relation to each other as the two ring members revolve around their common axis so as to create compression and expansion strokes.

Abstract: A drive ring for a rotary expansible chamber hydraulic motor has driving gear teeth on its inner periphery and is constrained against other than planetating motion by a series of angularly spaced eccentric bearings rotatably mounted in fixed port plates between which the drive ring is sandwiched. The eccentric bearings are hydorstatically balanced against peak loads with high pressure fluid. Vanes sliding in radial slots in the drive ring are maintained in engagement against a surrounding cylindrical chamber wall by leaf springs whose opposite ends slide in grooves in the port plates.

Abstract: A rotary pump which comprises a cylinder having two walls which cover both ends thereof to form a compressing chamber, each of the walls includes a bearing at its center and holes around the bearing to form an inlet or an outlet of the fluid, a shaft supported by the bearings and driven by a motor, a piston having two connected arc surfaces rotatably mounted within the cylinder, each surface of the piston including a groove, an outlet port and an inlet port, a separating plate mounted in the hole of the piston and dividing the hole into two parts and separating the outlet ports and inlet ports on each part, a plunger which may be moved back and forth in the piston hole to open or close the inlet ports. The present invention can pump the fluid in periodic high pressure or stable middle pressure by controlling the movement of the plunger in piston.

Abstract: A rotary machine including an outer housing, and a cam-shaped rotor mounted within said housing for rotation about an axis coincident with the axis of the housing with two sealing members for the rotor equally supported at diametrically opposed positions within the housing for movement toward and away from the peripheral surface of the rotor and in at least close sealing proximity with the adjacent surface of the rotor during at least part of the rotation of the rotor, the lobe portion of the rotor being at least in close sealing proximity with an adjacent inner surface of the housing, an inlet passage through said rotor and opening through the surface thereof on one side of said lobe portion, an exit passage also passing through the rotor and opening through the surface thereof on the other side of said lobe portion, said inlet and exit passages communicating with ports for admitting working fluid to, and exhausting working fluid from, said rotor.

Abstract: A power steering device includes a housing which couples to a pressure source in order to provide a power assist to the rotation of an output member upon rotation of an input member. The input member and the output member are rotatably supported within a housing bore such that the output member cooperates with an enlarged portion of the housing bore to define a plurality of pressure chambers. Slots on the input member and passages on the output member communicate the pressure source to one set of pressure chambers so that the increased pressure in these pressure chambers imparts rotation to the output member in response to rotation of the input member. A pair of cavities between the input and output members communicate the input member slots with the output member passages and projections on the output member oppose the slot side walls to limit rotation between the input member and output member.

Abstract: The invention relates to a rotary type piston machine of the type having inner and outer relatively rotatable and orbital ring and wheel gears and a pivotal drive shaft connected to the wheel gear. The casing forms sidewalls for the gears and leakage between the wheel gear and the sidewalls is a chronic problem. The wheel gear on the side opposite from the drive shaft is provided with an annular groove and a sealing ring therein to provide sealing between the inner gear element and the adjacent sidewall. The shaft side of the wheel gear has recessed areas in the crests of the teeth thereof to provide pressure compensation for the effect of the sealing the above referred to sealing ring on the opposite side thereof.

Abstract: The disclosure is directed to a rotary engine having an annular housing and a plurality of walls disposed around the interior of the housing with adjacent walls joined by rounded corners. A plurality of sliding pistons are disposed within the interior of the housing spaced apart from one another and connected radially to a drive shaft extending through the interior of the housing along the central axis thereof. The sliding pistons having face portions adapted to slide adjacent the inner surfaces of the walls are disposed radially outward of the drive shaft. End plates disposed at opposite sides of the housing and intersecting the central axis thereof enclose the opposite sides of each sliding piston which extend to adjacent the inner surfaces thereof. The sliding pistons are guided around the plurality of walls and rounded corners of the housing chamber by cams attached to the end plates.

Abstract: An orbital pump or the like comprises a housing having first and second end walls and intermediate, axially spaced first and second annular, inwardly projecting wall members. First and second axial drive shaft portions are installed through the housing first and second end walls respectively. A spool shaped engine rotor having radially outwardly projecting end flanges is installed in the housing with the first and second end flanges closely adjacent to axially outer surfaces of the first and second annular wall members. The rotor is eccentrically rotatably mounted to inner ends of the drive shaft portions. The two annular wall members and rotor ends divide the housing interior into an inlet plenum at the housing first end, a central chamber and an outlet plenum at the housing second end. A pair of intersecting rotor vanes, mounted diametrically through major portions of the rotor and in mutual orthogonal relationship, circumferentially divide the central chamber into four working chambers.

Abstract: Rotary engine construction wherein a lobed rotor cooperates with unique retractable separators to divide the bore into work chambers, the rotor lobes or pistons performing the intake, compression, power and exhaust functions rapidly, efficiently and smoothly, and wherein the simplicity of construction allows the number of firings per rotor revolution, their sequence and the compression ratio to be readily selected for a particular end use. The engine further embodies novel intake and exhaust valves and actuating structure therefor, work chamber inactivation mechanism, and positive oil pumping means.

Abstract: A planetary air motor with two internal gearings employing two internally toothed ring gears. One ring gear rotates and meshes with a first rim of a two-rim pinion, the other gear forms an intertooth space with a second rim of the pinion that is freely mounted on an eccentric journal of a pinion carrier and has radial through slots in the tooth spaces. The intertooth space is limited by a flange at one face and by a fixed washer at the other face of the fixed gear and is divided into two intertooth working zones A and B. Zone A communicates with the compressed air line and the other one (B) with the atmosphere. The pinion carrier has a main channel and an additional channel with an inside bore that is smaller than that of the main channel and which is isolated from the latter. The additional channel is disposed towards the periphery of an eccentric journal of the pinion carrier and communicates with the compressed air line and the intertooth working zone A through a slot in the pinion carrier.

Abstract: A rotary internal combustion engine comprising an elongated rotor having an oval shaped cross-section secured to a compartmentalized shaft rotatably disposed in an elongated cylindrical shaped bore in a stationary engine block. A plurality of vanes, having a curved wedge-shaped cross-section, are pivotally secured to the block and arranged to move into the cylindrical shaped bore into sealing engagement with the outer surface of the rotor. Fuel and air are delivered through the compartmentalized shaft into chambers between adjacent vanes where fuel is compressed, ignited, and allowed to expand applying torque to the oval shaped rotor. The oval shaped cross-section of the rotor has long sides which are substantially straight and first and second arcuate ends.

Abstract: An inner component of the fluid machine has an outer circumferential surface, and an outer component has an inner circumferential surface which eccentrically surrounds the outer circumferential surface. One of the components is rotatable relative to the other component. The inner component is formed with at least two pair of diametrically opposite guide slots each having an outer end open at the outer circumferential surface and an inner end, the inner ends communicating with one another and each of the guide slots receiving a sliding vane. The sliding vanes in the respective diametrically opposite guide slots are biased apart by at least one biasing spring located between inner ends of the guide slots.

Abstract: A rotary piston, internal combustion engine of the trochoid type is disclosed. The piston is arranged to rotate planetary fashion within a surrounding housing and has inlet and outlet channels therein for the inflow and outflow, respectively, of the working medium. According to the invention, a spring-loaded check flap is provided in each of the inlet channels to improve the charge alternation of the engine.

Abstract: A working member, i.e., an eccentric drive ring having internal teeth, orbits about a driven pinion having a lesser number of teeth to achieve gear reduction. Hydraulically expressed divider vanes on the orbiting drive ring engage the inner periphery of a surrounding fixed ring to define working chambers between the outer periphery of the drive ring and the inner periphery of the fixed ring. Port plates on opposite sides of the drive ring are respectively exposed to high and low pressure fluid. Valving occurs when slots on opposite sides of the drive ring are exposed to ports on the port plate as the result of the orbital movement of the drive ring, so as to establish fluid flow paths to and from the working chambers.

Abstract: In a fluid motor or pump, a combinaton is disclosed having an internal ring gear operably secured within a housing meshing with a pinion gear and having a wedge with a shape conforming to the outer peripheries of the ring and pinion gears to provide a sealing effect and pressure or suction chamber where the wedge has a piston end and porting in the tip thereof to create a hydrostatic pressure in an operable direction to overcome pressure from the chamber and means for supporting the pinion gearing and carrying the wedge in slidable relatonship where the mechanism receives fluid under pressure from a source to the pressure chamber and includes means for returning fluid to the source.