Abstract: A rotative machine for fluids comprising a plate with spiral-like passages for the circulation of fluid therein, in which also circulate the vanes of vane wheels carried by a disc coaxial to and facing said plate.Spiral-like walls placed inside the passages are movable in relation to the passages so as to vary the cross-sections of the passages and, consequently, the fluid circulating therein.

Abstract: An improved apex seal for a rotary engine of the type having a housing with an interior wall and a rotor having plural apices within the housing. A plurality of apex seals are provided, one at each of the apices on the rotor, for establishing a seal between the rotor and the interior wall of the housing. Each of the seals is thin walled and hollow and further includes a fluid inlet and a fluid outlet. Conduits are provided in the rotor for directing a coolant through each of the seals via the inlets and the outlets so as to control seal temperature and thereby minimize seal wear.

Abstract: Pump apparatus for injecting combustible fuel under high pressure into a diesel type internal combustion engine. The apparatus includes a body having a cavity with a diaphragm therein and an adjustable variable pressure applied intermittently to one side of the diaphragm causes a selected quantity of fuel to be pumped through the cavity on the other side of the diaphragm.

Abstract: Fluid inlet and outlet porting for a rotary fluid displacement device including a housing defining a cylindrical chamber and a pair of cooperating respective internally and externally toothed ring and star members in the chamber, the ring member encompassing the star member and having teeth at least one more in number than the star member, the members rotating on spaced parallel axes with the teeth thereof moving into and out of intermeshing engagement to provide alternately expanding and contracting fluid compartments. Inlet and outlet ports opening respectively to the expanding and contracting chambers, extend generally circumferentially of the ring member, the inlet port having one end in the shape of portions of the teeth of the ring and star members, said one end of the inlet port being disposed adjacent an area wherein the teeth of the members are out of intermeshing engagement.

Abstract: Seals for providing sealing contact between the rotary piston and the apexes of the casing of a rotary type combustion engine, compressor, or pump for sealing the several pressure chambers, one from the other or others, during operation. The seals are disposed in radially formed slots at each apex of the housing and are so constructed to permit pressure in the chamber being pressured to be communicated to the rear side of the seal, or the side opposite that which makes sealing contact with the rotary piston, so that such pressure acting on the rear side may assist the spring normally acting against the same side in forcing the seal against the rotary piston with greater pressure and thereby provide a better sealing effect.

Abstract: A rotary internal combustion engine comprising two intermeshing rotors provided with radially extending lobes and intervening grooves, the lobes of at least one of the rotors being provided with radially extending channels for supply and return of cooling liquid from and to, respectively, axially extending central channels of the rotor, said return channels being interposed between said supply channels and a heated surface portion of the lobes. The temperature difference between the cooling liquid portions in the radially extending channels being utilized for circulating the liquid under the action of the centrifugal forces arising during rotation of the rotors.

Abstract: A low-noise, high-pressure, high-performance gear pump, including pressure balancing means comprising pairs of surrounding seal members positioned between side walls of a pump casing and bearing means for bearing a driving and driven shafts associated with respective intermeshing gears to form pressure chambers between each pair of said pairs of surrounding seal members, and passage means provided through said bearing means for leading oil under intermediate pressure into said pressure chamber; and oil recovering means suitably associated with said pressure balancing means to enable the smooth recovery of oil used for lubrication.

Abstract: A piston of a rotary piston engine of trochoid type including an internal seal with a scraper ring of L-shaped cross section arranged axially movable in a concentric annular groove in one end wall of the piston and pressed with spring action against the adjacent end wall of the housing. The scraper ring is sealed off inside the annular groove by an elastic sealing ring arranged between the axial flange of the scraper ring and at least one wall of the groove. The elastic sealing ring consist of two closed metal rings immediately adjacent to each other and having their outer periphery in sealing and axially displaceable contact with the radial flange of the scraper ring. The rings are inserted with a radial play between their inner periphery and the radial inner wall of the annular groove smaller than the radial play between the axial flange and the radial outer wall of the groove.

Abstract: An improved rotary mechanism of the type having elongated seals for sealing the interface between a housing and a rotor mounted for movement therein, the seals being of the type which sealingly engage a relatively movable surface moving in a direction substantially longitudinally of the seals. The seals are provided with a plurality of recesses on both sides of the sealing surface along the length thereof, with the recesses on one side being staggered with respect to the recesses on the other. The sum of the width of adjacent recesses on opposite sides is substantially equal to or greater than the width of the sealing surface of the seal if the recesses were not present.

Abstract: An engine is disclosed in which a piston is mounted to orbit in a circular path within a working chamber for use as a fluid pump or motor. The working chamber includes a pair of juxtaposed cylindrical chambers which are interconnected by an arcuate chamber, with inlet and outlet ports opening into the cylindrical chambers. The walls of the cylindrical chambers are formed with recesses for preventing hydraulic lock-up and vacuum formation. The piston includes a pair of spaced-apart crank ends which carry an arcuate mid-span as the principal displacement element. A drive train conjointly moves the crank ends in circular paths within the cylindrical chambers which in turn gyrates the mid-span in a circular orbit within the arcuate chamber. The working volumes within the engine successively expand and contract for inducting fluid through either port, depending upon the direction of gyration, and for exhausting the fluid through the other port.

Abstract: A gas compressor or blower comprising a cylinder having gas intake and exhaust ports; a piston which is rotatably and reciprocably movable in the cylinder; valve means for admitting gas into and exhausting air from at least one chamber lying to one side of the piston; a piston shaft to which the piston is secured, the piston shaft passing through seals at the axial ends of the cylinder; means for applying a rotary drive to the piston rod; and a cam arrangement for causing reciprocation of the piston rod as this rotates; wherein said cylinder has an end piece at each end thereof; a set of at least three equiangularly spaced follower assemblies is mounted on an axially outer face of each said end piece, and said piston shaft is supported for rotation by two spaced bearing assemblies, one adjacent to each end of said cylinder and supported by a respective set of said follower assemblies such that each said bearing may move axially relative to said follower assemblies.

Abstract: A fluid pressure device such as a hydraulic pump is provided having an improved inlet porting arrangement to permit a greater output flow rate for a given input speed. The pump is of the type including a housing defining an inlet chamber and an outlet chamber and inner and outer rotors having spaced apart axes of rotation defining a line of eccentricity. The teeth of the rotors interengage to define a plurality of expanding and contracting volume chambers. The housing includes an end face adjacent the rotors at which the inlet chamber defines an inlet port communicating with the expanding volume chambers. The inlet port is generally arcuate and extends circumferentially from approximately the line of eccentricity on one side of the device to the line of eccentricity on the opposite side of the device.

Abstract: An annular sleeve is radially deformed within a cylindrical bore to provide a housing for a pump having vanes slidable through slots in an eccentric rotor, the radially opposed edges of the vanes slidably contacting the inner surface of the sleeve.

Abstract: A rotary four-cycle internal combustion engine having an expansible combustion chamber defined by three identical rotors of generally triangular cross-sectional shape journalled for cooperative rotation about parallel axis and so arranged in peripheral line contact with one another as to sequentially expand and contract the combustion chamber as the rotors rotate in unison as controlled by gearing. The rotors are journalled within a cylindrical housing structure comprising inner opposed end walls between which the rotors extend to define the ends of the central combustion chamber. A rotary valve mechanism communicating through one of the opposed end walls and geared in timed sequence with the rotors, provides for discharge of the gasses of combustion and the intake of gaseous fuel during respective exhaust and intake phases of operation, while at the same time serving as a power output shaft.

Abstract: An improved rotary mechanism having a housing defining an operating chamber, a shaft journalled in the housing and extending through the chamber, a rotor journalled on the shaft and within the operating chamber, at least one seal receiving groove in the rotor and a seal within the groove having a surface sealingly engaging the housing. An elastomeric O-ring is disposed within the groove and sealingly engages the sides of the groove. It is also disposed adjacent the seal oppositely from the sealing surface. A conduit is provided for directing fluid under pressure to the interior of the O-ring to cause the same to bias the seal against the housing.

Abstract: An apparatus for producing mechanical energy utilizing the sun's rays is disclosed. The apparatus includes a continuously rotating structure having a plurality of thermally actuated pump units, consisting of a temperature sensitive cell and a piston assembly, mounted thereon. A focusing means concentrates solar rays on a number of the cells causing the expansion of material contained in each cell, resulting in the extension of a piston rod, the compression of a cylinder within the piston assembly and the transfer of fluid contained therein to a high pressure accumulator for operating hydraulic motors or the like. When rotated from under the focusing means, the cell cools resulting in a decrease in volume of the expansible material and a retraction of the piston rod causing fluid to enter the piston assembly from a reservoir.

Abstract: A displacement machine for compressible media comprising a displacement compartment bounded by an inwardly situated spiral-shaped side wall and an outwardly situated spiral-shaped side wall, the displacement compartment describing a span angle which exceeds 360.degree. and extends from an inlet to an outlet. The displacement compartment is provided with a displacement element which carries out a circulatory movement relative to the displacement compartment and likewise possesses the shape of a spiral and has practically the same span angle as the displacement compartment. The displacement element, during the course of the circulatory movement, always contacts both the outer situated side wall and the inner situated side wall at least at one respective advancing contact line. A pole of a first section, spanning approximately 360.degree.

Abstract: A unique two piece rotor construction and method of fabrication is disclosed. The rotor is cast in split positions (bifurcated along a central plane) by a shell molding or high pressure green sand technique. The portions have special pairs of interfitting mating faces, at least one being generally radially directed and at least one being generally axially directed. After the cast portions have said interfitting faces machined to a predetermined finish, and cleansed. The portions are assembled in a fixture with flux and braze material between said faces. The assembly is heated in a controlled atmosphere furnace to complete the brazed bond between said faces.

Abstract: The present invention relates to a non-contact type vane pump adapted to prevent the generation of heat due to direct contact between the outer edges of the rotatively driven vanes of the vane pump and the inner surface of the pump casing. The principle arrangement resides in this that the extent to which the vanes rotating under the action of centrifugal force extend radially during operation is suppressed by guide members of less frictional loss disposed in a region adjacent to the center where the peripheral speed is minimum. Non-contact type vane pumps having sub-arrangements based on said principal arrangement are also provided. Advantages and details of such arrangements will be made clear.

Abstract: A screw compressor apparatus in which the rotors have equal pitch circle diameters, and addendum and dedendum of equal radius.