Abstract: An oilless double rotor, rotary gas compressor with second stage inputs for precompressed gas is described. A compression rotor having at least three lobes which match in intersection to cavities in a counterrotating valving rotor providing an extended sealing surface. The lobes further provide an extended, near-contact surface with the housing with adjacent lobes defining successive compression chambers. Second stage ports are also provided for input of precompressed gas for use with energy recovery systems. A discharge equalization passage is provided in association with a discharge port for efficient gas exhaust.

Abstract: An internal combustion engine includes a compressor and an expander of the type having a pair of multilobed, intermeshing rotors rotatably installed in a casing, and a combustion chamber communicating with said compressor and expander through their respective discharge and intake ports. Valve means are disposed at the discharge and intake ports to control fluid flow. The expander is provided with a higher volumetric capacity than that of the compressor to promote a complete expansion of the gases. The compressor delivers successive and separate charges of compressed air-fuel mixture to the combustion chamber. Heat is added at constant volume to said compressed mixture to produce high pressure gases which are thereafter, transferred to the expander to produce mechanical work.

Abstract: A single rotary pump is provided with a driven valve having outer curved faces and inner curved recesses along the major axis thereof, a rotary piston having vanes between which there are semi-ellipses having raised portions therebetween, said valve being driven by an external source to cause rotation of said piston whereby liquid under pressure flows from an inlet of the pump to an outlet of the pump.

Abstract: A fluid machine comprises two rotors, one rotor having at least one projection which engages within a recess within the other rotor. During operation, fluid passes between the first rotor and a peripheral surface of a working chamber within which the rotors are mounted. A fluid inlet and a fluid outlet are so arranged as to face generally in the direction in which the fluid moves around the first rotor. Pressure-equalization passages are provided in the rotors, and extend between the opposed axial faces of the rotors whereby, to equalize the fluid pressure at the axial faces. The machine may be used as a pump for water and other liquids.

Abstract: This machine can serve as a compressor or motor and, more specifically combines a compressor and a motor to constitute an internal combustion engine with compressed air injection. A toothed rotor is rotatable in a fluid displacement chamber and in sealing contact with a sealing rotor having peripheral cavities for receiving the teeth of the toothed rotor. Both rotors are axially curved, so as to better resist differential axial thrust exerted on the same and, therefore, maintaining better sealing contact. The teeth of the toothed rotor are generally of a hemispherical shape to facilitate the provision of effective sealing segments.

Abstract: A casing (10) is formed with two cylinder chambers (21, 22) in overlapping arrangement between an inlet (43) and an outlet (44). A rotary piston (27, 28) each is fixed to a respective one of two shafts (17, 18) extending through a cylinder chamber (21, 22) each and being interconnected for rotation in opposite sense. The rotary pistons (27, 28) are complementary and each have an exterior face (29, 30) coaxial with the corresponding shaft (17, 18), the exterior faces periodically forming sealing zones with the casing (10) and with a respective exterior face (38, 37) of respective sleeve (35, 36) each which is coaxial with the shaft (18, 17) of the complementary rotary piston (28, 27). Each sleeve (35, 36) is sealingly arranged and rotatable between a respective one of the rotary pistons (27, 28) and the corresponding shaft (17, 18).

Abstract: An external shaft rotary piston machine wherein pistons of a piston rotor run in engagement with a cavity of a circular cylindrical sealing rotor during a particular relative rotational position of the rotors, the cavity being substantially larger than necessary for passage of the pistons in order to avoid flow losses due to seal wedging flow and compression. In order to avoid overflow from the high pressure side to the low pressure side of the machine through the sealing rotor while the pistons move in the sealing rotor through the space defined by the cavity, a sealing effect is created by a leading edge and a trailing edge portion of the opening of the cavity of the sealing rotor moving along a leading and a trailing side surface of the pistons. This is effected kinematically due to the fact that the trailing edge of the cavity opening is displaced radially inwardly and that an edge portion extends from the trailing edge convexly relative to the peripheral surface of the sealing rotor.

Abstract: A rotary piston machine, in order to avoid losses due to compressed flows, has adjacent to a generating and/or sealing contact edge (21, 22) at least one recess (11a, 11e) and/or opening (12a, 12b) which extends beyond the contact curve (14a-14c) in at least approximately the direction of motion of the surfaces moving in relation to each other during the stroke or passage of the piston (6a") through the shut-off driver. The spatial dimensions of the recesses and/or opening are such that the flow in it is not substantially accelerated even when the direction is changed. An opening (11g, 11g') can be closed insofar as it is located in a nonmoving ring (6b). To prevent low pressures between surfaces moving away from each other (9c, 14c) a pressure compensation space (11e) is connected to the contact line (14c) of one of the surfaces.

Abstract: The invention relates to a stepped-disc pump with at least two mutually engaging rotors rotating at the same speed in opposite directions and constructed from stepped discs arranged in a row on a shaft and each having only one engagement segment, adjacent stepped discs being in each case mutually offset by a defined angle and being constructed and arranged in such a way that, together with the casing, they form closed delivery chambers. The characteristic feature of the invention is that the offset angle .alpha. is equal to the angle .beta. which is obtained by connecting the points of intersection (5.sub.1, 5.sub.2) of the envelope circles of the rotors (2, 3) to the centers (M.sub.1, M.sub.2) thereof, and that the offset angle .alpha. is equal to 360.degree./n, n being an integer greater than 3.

Abstract: This invention provides apparatus for use in a drive transmission system comprising a pump adapted to perform work on a medium and means repetitively and automatically to unload the pump. When connected with a flywheel driven by a prime mover an embodiment alternately performs work and then is unloaded to permit acceleration of the flywheel. In use in a driven transmission system there is provided a flywheel driven by an engine, a pump driven by the flywheel, powered by the pump, and means repetitively to unload the pump permitting the engine to accelerate the flywheel and compensation means to power the hydraulic motor while the pump is unloaded. The pump is preferably a rotary positive displacement pump having relief galleries eliminating the seal between pumping elements driving each cycle.

Abstract: An internally axed crankless piston engine wherein a piston rotor has at least one piston which moves through a circular annulus defined between a fixed inner casing and a fixed radially outer casing. A stopping piston is provided which defines the terminus of the annulus at one point on its circumference and an inflow duct issues into the annulus via an opening in the fixed inner wall of the inner casing or is arranged in the fixed radially outer casing wall adjacent to the stopping rotor while adjacent to the stopping rotor an outflow duct is provided in a fixed radially outer facing wall of the outer casing.

Abstract: The embodiment depicted comprises a pair of coacting rotors, in a rotary compressor, having interengaging lobes and grooves, the rotors being journaled in intersecting bores in a housing. The circumferential surfaces, and end walls of the bores are polymer-layered, and the rotors carry abrasive to machine the polymer to define an optimum clearance for rotor rotation within the bores, and in coaction together. Each rotor is polymer-coated and abrasive particles are borne in the polymer on the outer edges of the lobes and in discrete radial patterns on the rotor sides. The method defines the polymer-coating and abrasive particles-deposition steps.

Abstract: A rotary compressor of the type in which a female rotor and a male rotor turn in opposite directions in the compressor casing, the female rotor having at least one pocket therein that receives at least one lobe on the male rotor, the lobe sweeping a cylindrical side wall of the casing to effect compression of a gas. A sealing rib is provided on the female rotor on the trailing side of the pocket, and a recess is provided on the male rotor at the rear of the lobe for receiving this rib. The female rotor has a peripheral surface extending rearwardly from the rib with respect to the direction of rotation of the female rotor, and terminating in the same or a different pocket, this peripheral surface being spaced a substantial distance radially inwardly of the surrounding cylindrical side wall of the casing, the rib sweeping this side wall with close clearance and hence effecting a portion of the compression of the compressor.

Abstract: The machine comprises a housing with parallel intersecting bores in which two pair of lobed rotors are rotatably mounted. The housing has high-pressure, end ports which are occluded and exposed by one rotor, i.e., a gating rotor, of each rotor pair. The gating rotors and their paired, co-acting rotors, i.e., main rotors, have different-sized hubs. The gating rotors have the larger-diameter hubs to control the high-pressure end ports. The rotor pairs are so configured and dimensioned as to insure that each pair defines a constant and uniform clearance therebetween in all rotary positions, and provide a machine having an optimum performance.

Abstract: An external combustion engine is disclosed of the type including two or more circular rotors rotatably supported, one of the rotors acting as a power rotor and rotating in tangential contact with the other sealing rotor. The power rotor is formed with a radially projecting piston passing into a mating recess with the sealing rotor at a corresponding circumferential location. Steam or other working fluid is admitted via an intake port located opposite one face of the power rotor to cause rotation of the power rotor by expansion of the fluid in a working chamber defined by the space behind the piston. As the power rotor continues to rotate, the working chamber passes into communication with an exhaust port preparator to another power stroke. A vacuum relief port is provided at an intermediate location which relieves any vacuum condition which develops behind the piston during part throttle operating conditions of the engine.

Abstract: The invention concerns the formation of the high pressure port in a rotary, positive displacement machine, such as a gas compressor, with an extension which is traversed by the plane on which the parallel axes of the rotors are commonly positioned. A given portion of the port extension is constantly occluded by the gating rotor and, consequently does not add to the effective area of the port. However, the remaining portion of the extension is exposed by the gating rotor, effectively defining a port opening which reaches to the common plane. Thus, in gas compressor use of the machine, the port extension insures that all the compressed gas product is delivered through the exhaust port.

Abstract: In a gear pump or motor having a housing and at least two intermeshing gears, one of the gears being fixed to a rotatable shaft and the other being a shaftless gear having a plurality of gear teeth rotatable on a film of fluid in close proximity to an interior surface of the housing, the improvement being a unique tooth profile on the shaftless gear. Each gear tooth on the shaftless gear has a thick top land, preferably at least twice as thick as the top land on each gear tooth on the gear fixed to the rotatable shaft. This particular intermeshing gear tooth configuration increases the bearing surface of the shaftless gear on the film of fluid within the interior of the housing to better support the shaftless gear and thereby reduce frictional wear.

Abstract: A plastic extrusion apparatus is provided which includes a gear pump for accurately metering the plastic through a die. The apparatus is adapted to process highly viscous plastic material under high temperature and pressure conditions, and the gear pump includes a non-leaking and substantially frictionless seal for the drive shaft. The seal comprises a sleeve surrounding the shaft, and a shallow helical channel formed in the bore of the sleeve, with the helical channel being of a hand such that forward rotation of the shaft results in the plastic which enters the clearance between the shaft and sleeve to be effectively pumped back toward the interior of the housing.

Abstract: A rotary compressor, expansion engine, or the like. Two interengaging rotors rotate in a casing structure. The optimum number of lobes per rotor is two for pressure ratios up to about three. The first rotor has end plates thereon which open and close larger ports in the end walls. Low pressure dump pockets are formed twice per rotation and these have now been determined to have negligable loss. The first rotor has lobes of small angle so as to reduce a precompression loss. The second rotor has lobes of larger angle so as to improve performance. An interchamber throttling loss has now been reduced. When operating as a compressor machine, the discharge ports start to be uncovered about 15 degrees early for better performance.

Abstract: A pair of tangential rotors are provided on separate shafts dependently rotatable in a housing, one having a vane and the other a notch for allowing passage of the vane, to form a fluid-tight segmented annular region through which the vane moves. A valve admits a mass of high pressure compressible fluid to the region through a triangular port for expansion, or from the region after compression, the mass of fluid being confined in a portion of the region between the vane and the surface of the notched rotor and changing in pressure because of the change in arcuate length and thus volume of the confined region portion. Multiple pairs of rotors may be included on the one rotor and two notches on the other. Two vaned rotors may cooperate with one notched rotor, the vaned rotors being on separate shafts.

Abstract: A seal mechanism for the periphery of the rotor of a rotary piston engine including a sealing ledge supported on the rotor to be pivotable about an axis extending in the longitudinal directional thereof and operative to make sealing contact with an opposed surface of said rotary piston engine over a limited region of the periphery of the sealing ledge facing toward said opposed surface. Through at least one secondary member extending parallel to the sealing ledge at a point of its periphery between the sealing ledge and the rotor, a surface region is defined on the sealing ledge at which forces are developed by the fluid working medium of the engine to effect a desired sealing engagement between the sealing ledge and the opposed surface of the engine.

Abstract: The machines may function as a rotary compressor, vacuum pump, expansion engine, or the like. Two interengaging rotors rotate within intersecting bores in a casing structure. Two higher pressure ports are located one in each flat end wall of the casing. One rotor opens and closes the two higher pressure ports so as to control the flow of air or gas through same. The optimum number of teeth or lobes for each rotor is two. The port controlling first rotor has lobes of small included angle so as to reduce the effect of a precompression loss. The coacting second rotor has lobes of larger included angle so as to improve performance.

Abstract: A single cycle, rotary combustion engine having constant fuel feeding. A circular housing defines an annular chamber through which a complementally curved pistonhead travels and works only upon the explosive or combustion stroke. A drive shaft is supported transversely of the housing, such that a piston rod extends radially from the drive shaft through an inner sealing drum so as to present the curved pistonhead within the annular chamber. Fuel and air are fed through the piston rod within the annular chamber via one or more ports in the trailing edge of the pistonhead. An ignition point and an expulsion port, mounted approximately 280.degree. from each other are sealed from one another by rotary means. The engine is characterized by its elimination of valves and reciprocating parts.

Abstract: A positive displacement device utilizing at least two rotors which roll sealingly on one another at a common pitch surface speed. Outwardly extending lobes on one rotor sealing engage the cylindrical bore of the housing of the device, fluid traversing the device circumferentially in the annulus between such bore and the pitch surface of the rotor. Speed of rotation of the two rotors is controlled by a timing chain running between sprockets mounted on the rotor shafts.When the lobe passes the line of sealing contact, a cavity is provided in the meshing rotor, and the lobe makes sealing contact with the wall of this cavity during at least that interval when there is no sealing contact between the pitch surfaces, i.e., the interval when the mouth of the cavity is passing through dead center.

Abstract: A single rotary fluid unit can act either as a compressor or as an expander. Each unit has a casing enclosing two rotors moved in synchronism. The rotors sealingly engage and coact with each other and the casing walls to form chambers providing the necessary intake and exhaust functions. Two units can be connected together to operate in a mirror-like or reverse fashion whereby one unit is a compressor and the other unit is an expander. The thus formed compressor-expander units or apparatus can be connected to additional apparatus to form a Stirling cycle engine or an air cycle refrigeration apparatus.

Abstract: A reversible reduction gear motor which is driven by a pressurized fluid such as air or a liquid is provided having a hollow recoil rotor, which engages a drive motor and which is mounted rotatably on a shaft which extends through the recoil rotor. This shaft, which extends through the recoil rotor, has a reduction gear mounted on one end which engages a pinion mounted on one end of the shaft of the drive rotor. The other end of the shaft, which extends through the recoil motor, has a pinion mounted on it which engages a second reduction gear, the axis of rotation of which is coincident with the axis of rotation of the drive rotor. The driving fluid is supplied by conduits disposed within the motor and is controlled so that it can be supplied to drive the rotors in either a forward or reverse direction.

Abstract: A cylinder wheel member having a plurality of cylinder cavities is in meshing engagement with a piston wheel member having a plurality of piston elements between which segment-like cavities are provided. The meshing engagement of said wheel members provides expanding and contracting working chambers in the cylinder cavities of said cylinder wheel member as well as in the segment-like cavities of said piston wheel member. A disc-like commutator valve rigidly connected to said piston wheel member has two types of through passages, the first type of which connects the working chambers in said cylinder cavities of the cylinder wheel member to fluid inlet and outlet means of a casing rotatably supporting said wheel members and the second type of which connects the working chambers both in said cylinder cavities of the cylinder wheel member and in the segment-like cavities of said piston wheel member to said inlet and outlet means for a fluid.

Abstract: A rotary piston machine is provided in which the, or each, auxiliary rotary piston has a portion projecting axially beyond at least one end face of the main rotary piston, and in which a transfer port is provided in an end wall of the main rotor bore leading to the part of the auxiliary rotor bore containing said projecting portion of the auxiliary rotary piston and a discharge port is provided leading from said part of the auxiliary rotor bore at a position spaced from the transfer port, said projecting part of the auxiliary rotary piston providing a rotary valve for opening and closing communication between the transfer port and the discharge port at the required times during the rotational cycle of the machine.

Abstract: A rotary displacer mechanism of the rotary-abutment type utilizes improved piston and sealing rotor design to reduce internal leakage and increase volumetric efficiency. A rotary-abutment positive displacement mechanism typically comprises a housing which encloses a rotary piston having a plurality of lobes and a cylindrical sealing rotor having a plurality of cavities for accepting the piston lobes during rotation. The improved piston design consists of a cylindrical stationary block around which only the lobes of the piston are rotatable. This design reduces bearing loads and allows for improved sealing characteristics. In addition, the sealing rotor is constructed with two axial sections of unequal diameter to provide a valving operation on either the intake or the discharge ports of the displacer, as required, and, at the same time, maintain communication between working volumes in the main rotor and sealing rotor bores.

Abstract: The unloading means comprise unloading ports, and valving therefor, for step-control unloading of a gas compressor. In a first embodiment, the unloading means are provided in side walls of a rotary, positive displacement, gas compressor, and in an alternate embodiment the unloading means are disposed within end walls (of a rotary, positive displacement, gas compressor), and comprehends means for step-control of a plural-stage machine.

Abstract: A mechanical system for a rotary machine, which has a rotor and sets of abutments arranged around the rotor. The abutments are arranged to couple mechanically with the rotor and with separate consecutive variable volume channels or chambers of different pressures dividing a peripheral groove in the rotor by blades.

Abstract: A fluid flow meter of the positive displacement rotary kind where a housing defines an annular passage coupling input and output ports, a rotor has depending blades which are driven around the passage by the flow of fluid and an idler has pockets which accommodate the rotor blades in sealed relationship as the blades pass from outlet to inlet, the invention being characterized in the provision of two rotors each having blades and pockets and two annular passages accommodating respectively the blades of the different rotors, and each rotor constitutes the idler for the other rotor.

Abstract: Relating to use in 4-stroke displacement engines which were disclosed in a prior patent, this improvement prevents free communication of fluid and reduces internal leakage through the ported pass or between the two displacement sections of these machines.

Abstract: A rotary diesel engine comprising a casing which forms a working space composed of intersecting cylindrical chambers. A rotor is rotatably positioned in at least one of the chambers and a rotary sealing member is positioned at least in one of the other of the chambers, the rotor having a plurality of radially extending lobes and the rotary sealing member having a plurality of radially extending grooves intermeshing with the lobes. A fuel injection assembly is cooperatively carried by the rotary sealing member and is made up of a manifold, a fuel entry port, fuel injection chambers, and pressure building and metering components for each of the fuel injection chambers. An appropriate actuating device, stationarily located external to the rotary sealing member, provides control for the complete fuel injection assembly.

Abstract: This invention relates to a rotary engine that functions without internal gears, off-centered rotors, reciprocating pistons, crankshafts, trochoidal chamber, chains, nor belts. (While no claim can be made on missing parts, the fact that such conventional parts are missing is one of the reasons that make this invention different from prior arts, and, therefore, it is so listed.) The preferred embodiment, comprising multipurpose rotors, paired dams, combustors, turbines, etc., could be made small enough to run a lawn mower or large enough to fly a big air plane. It uses a modified form of combustors, wherein combustion takes place amid ample air, thus promoting a fuller combustion of fuel at a lower temperature than in conventional rotary and reciprocating piston engines. Consequently, this invention has a surprisingly low amount of CO, NO.sub.x, and unburnt hydrocarbons in its exhausts.

Abstract: A rotary internal combustion engine comprising: a compressor section, a power section and a combustion chamber therebetween. The compressor section may comprise a pair of intermeshing gear members mounted in a compressor housing having an inlet on one side and a discharge on the opposite side. The intermeshing compressor gear members are mounted for rotation in opposite directions to compress and transfer air-fuel mixtures from the inlet to the discharge. The compressor discharge may be connected to the combustion chamber for combustion of the air-fuel mixture therein. The power section may comprise at least one rotor mounted in a housing having an inlet connected to the combustion chamber and through which expanding gases are directed against the periphery of the rotor for driving an output shaft connected thereto. The rotor may be connected to at least one of the compressor gear members for rotation thereof.

Abstract: An engine unit operable independently or joined in multiples of two or more units for smoothing out the torque flow at slow speeds, each unit including a fuel-suction-compression assembly and a power generating assembly employing the same main shaft and separate valve shafts gear driven therefrom at a two-to-one ratio. Each assembly has a plate-like block bored out to provide a central cylinder chamber and two planetary cylindrical valve chambers. Fixed on the main shaft and rotating in said central chambers are two like rotors having cylindrical hubs and two arcuate segmental pistons extending diametrically therefrom to make smooth sealing rotational engagement with the walls of said central chambers. Fixed on said valve shafts are arcuate segmental valves making smooth sealing rotational engagement with said valve chambers and said rotor hubs.

Abstract: A rotary compressor having mating rotary impellers defined by lobes and well spaces therebetween, a discharge port sealed by the peripheral surface of one of the lobes and passages for communicating one impeller well space with a well space of the other impeller as the discharge port is sealed by the one impeller peripheral surface. According to one form, the passages are defined by conduits in the compressor housing; whereas according to a second form the passages are defined by a recess in one impeller and the interior of the compressor housing.