Class 418/58 - Plural working members or chambers

Subclass of Class 418 - Rotary expansible chamber devices
Definition: Apparatus in which there is provided either (1) a plurality
No. of patents: 39
Last issue date: 10/14/2008

Number	Title	Issue Date
7435066	Oil pump The present invention provides an oil pump in which eroding of the inside of the pump due to cavitation and erosion is prevented by minimizing the pressure change in a fluid when inter-tooth spaces formed by an inner rotor and an outer rotor transport the fluid from...	10/14/2008
7419369	Displacement type expansion machine and fluid machine Disclosed is a displacement type expansion machine. In the displacement type expansion machine, a communicating passage (72) for allowing fluid communication between an expansion-process intermediate position and an outflow position in an expansion chamber (	09/02/2008
7404705	Blending pump assembly A blending pump assembly for accurately maintaining the proper ratio of two fluid components. Flow of a first fluid is utilized to drive a fluid motor, which in turn drives a pumping mechanism to inject a proportional amount of a second fluid into the flow of the fi...	07/29/2008
7328672	Radial impulse engine, pump, and compressor systems, and associated methods of operation Radial impulse engine, pump, and compressor systems are disclosed herein. In one embodiment of the invention, an engine includes a first end wall portion spaced apart from a second end wall portion to at least partially define a combustion chamber therebetween. In t...	02/12/2008
7325517	Radial impulse engine, pump, and compressor systems, and associated methods of operation Radial impulse engine, pump, and compressor systems are disclosed herein. In one embodiment of the invention, an engine includes a first end wall portion spaced apart from a second end wall portion to at least partially define a combustion chamber therebetween. In t...	02/05/2008
7182586	Scroll compressor A scroll compressor includes: a frame fixedly installed in the casing to support a rotary shaft of the driving motor and having a second suction opening at its one side and a second discharge opening at its other side; a fixed scroll fixedly installed at the frame a...	02/27/2007
7131826	Blending pump assembly A blending pump assembly for accurately maintaining the proper ratio of two fluid components. Flow of a first fluid is utilized to drive a fluid motor, which in turn drives a pumping mechanism to inject a proportional amount of a second fluid into the flow of the fi...	11/07/2006
6447268	Positive displacement engine with integrated positive displacement rotary fluid compressor A positive displacement engine with integrated positive displacement rotary fluid compressor has a piston chamber, a piston disposed in the piston chamber, a rotary compressor housing, the rotary compressor housing have first and second interconnected rot...	09/10/2002
6428296	Horizontal scroll compressor having an oil injection fitting A horizontal scroll-type compressor is provided with an oil injection fitting that extends through the compressor shell and communicates lubricating oil to a lubrication passage in the crankshaft for providing lubricant to the compressor and other compone...	08/06/2002
6059550	Twin-cylinder impeller pump A twin-cylinder impeller pump is disclosed. In the above pump, the twin-cylinder runner (3, 4) is provided with an elastic sealing means for removing any gap from the junction between the runner and the throat of a pump casing (10) with the runner being p...	05/09/2000
5911567	Positive displacement pump apparatus A positive displacement pump apparatus includes a housing formed of a housing wall including a wall portion; a pump center line; a pump drive shaft extending through the wall portion coaxially with the pump center line and having a terminus within the hou...	06/15/1999
5895421	Artificial heart An artificial heart comprising a case with inlet and outlet openings for blood which can be implanted in human body instead of an incurable human heart and can provide the normal blood flows in both large (body) and small (lungs) blood circulations for a ...	04/20/1999
5704774	Pump with twin cylindrical impellers A pump which is easy to manufacture and which has a high efficiency and low vibration includes a pair of identical circular-shaped impellers which are respectively eccentrially and rotatably connected to respective parallel shafts so as to rotate opposite...	01/06/1998
5385453	Multiple compressor in a single shell A refrigerant compressor system utilizing a plurality of motor-compressors in a single shell in order to provide capacity modulation, wherein each motor-compressor is of the welded hermetic type having a minimum of modification, in order to take advantage...	01/31/1995
5385457	Nutating positive displacement device having a magnetic element wire sensing arm A positive displacement device is presented. The mechanism comprises a nutator capable of nutating within a nutating chamber defined by the interior surface of the body of the positive displacement device between an inlet into and an outlet out of the pos...	01/31/1995
5277564	Closed type scroll compressor with spherical slide bearing for the oil tube A closed type scroll compressor has a drive shaft supported by a frame through bearings lubricated with a lubricating oil supplied from an oil reservoir via a lubricating oil passage bore formed in the drive shaft. The end of the drive shaft in which the ...	01/11/1994
5259740	Rotary compressor A rotary compressor comprises a body forming an even number of parallel cylinders arranged equidistantly about an axis within a common plane oriented perpendicularly to the axis. An eccentric roller is rotatably mounted in each cylinder for sucking-in flu...	11/09/1993
5259739	Non-reciprocating multi-piston engine A mechanism for providing motive power consisting of a plurality of rotary-type pistons fitted into chambers uniformly situated about the axis of the engine in a housing for improving the effective displacement and compression of such engines. Motive forc...	11/09/1993
5211031	Scroll type compressor and refrigeration cycle using the same A scroll type compressor having a pair of scroll type compression units which are encased in the same casing so as to make a common use of a lubricating oil reservoir provided in the casing, wherein the compression units have compression elements, drive s...	05/18/1993
5114323	Nutator bearing assembly The present invention is a nutating positive displacement device including a nutator with an inverted pendulous, low friction, substantially non sliding vertically elongated double pivoting nutator fulcrum. The fulcrum is one member comprising a bottom ba...	05/19/1992
5112201	Scroll compressor apparatus with separate oil reservoir vessel A scroll compressor apparatus comprising a closed scroll compressor, an oil reservoir vessel separate from the closed scroll compressor, a discharge pipe, and an oil supply pipe. The closed scroll compressor includes a closed container having a suction po...	05/12/1992
5069606	Rotary fluid displacement apparatus Two essentially identical oval shaped blades each attached rotatably by axles within a cylindrically shaped main chamber of a housing. Each blade has a cross-sectional profile approximating opposing larger radius 90 degree arcs connected by opposing small...	12/03/1991
5039290	Rotary expander A positive displacement single expansion steam expander engine. Cylinder heads are fixed to the wall of the engine. A rotatable power shaft assembly has a plurality of nests. Received in each of the nests is a free-floating piston (nonengaged) having lobe...	08/13/1991
5033944	Lubricant circuit for a compressor unit and process of circulating lubricant A lubricant circuit and a process for circulating a lubricant through such lubricant circuit of a compressor unit incorporating a planetary rotating compressor having a piston in an opening of a cylinder-piston. One embodiment of a circuit and one embodim...	07/23/1991
5024588	Rotary compressor and process of compressing compressible fluids with intake and discharge through piston shaft and piston A rotary compressor and process of compressing compressible fluids wherein the compressor comprises a housing having at least two axially spaced walls and rotatable in relation to the housing cylinder-piston and piston elements journaled on eccentric port...	06/18/1991
5004409	Displacement machine A prime mover or pump comprising of a first stationary plate and a second plate arranged parallel to the stationary plate and spaced therefrom. The second plate is rotatably mounted about its central axis. A plurality of elongated wall elements are dispos...	04/02/1991
4911622	Nutator bearing assembly An off center one spot nutator fulcrum rocking bearing assembly is presented. The assembly comprises a non rotating circular cylindrical fulcrum rod coupled at each end to a selected fixed point inside a nutating pump chamber. An off center non rotating r...	03/27/1990
4886433	Displacement machine having spiral chamber and displacement member of increasing radial widths A displacement machine for fluids, having a displacement chamber, arranged in the manner of a groove in a fixed casing, running approximately spirally from an inlet to an outlet and spanning more than 360°, into which chamber a likewise essentially spira...	12/12/1989
4789315	Positive displacement machine, more particularly pump, and method for fabricating such pump The machine comprises two plate-like supports (9, 12) each provided with a crown of displacement blades (10), respectively displacement chambers (11), engaged into each other, and displaceable into a relative circular translation motion. The drive is impl...	12/06/1988
4699576	Positive displacement device A positive displacement device capable of performing the typical positive displacement device functions such as pump, generator, flow meter, etc. is presented. The device comprises a housing having interior surfaces defining an inlet and an outlet separat...	10/13/1987
4553912	Cylinder-piston of a rotary compressor An unsymmetrical cylinder-piston of a rotary compressor having a body with a bearing for receipt of a rotatable cylinder-piston shaft therein; two spaced walls extending from the body and having opposing parallel surfaces; a wall interconnecting the two s...	11/19/1985
4431356	Hermetic refrigeration rotary motor-compressor A hermetic refrigeration rotary motor-compressor comprising a hermetically sealed pressure tight housing can enclosing a compressor unit comprising rotary cylinder-piston and piston elements journaled on eccentrics of two oppositely rotatable shafts, and ...	02/14/1984
4422836	Rotary machine with peripherally contacting rotors and end face sealing plate A rotary machine has a plurality of rotors rolling over one another and defining therebetween and end covers at least one working chamber, and at least one sealing plate at at least one side of the rotors and arranged so that an opposite side of the seali...	12/27/1983
4384832	Engine with counter-rotating rotors having hemicylindrical pistons A rotary engine having two opposite rotating rotors forming a substantial part of a toroidal chamber such that the toriodal chamber is parted into two lateral parts formed by an outer rotor having a disk-like part forming one side of the chamber and a lat...	05/24/1983
4324537	Rotary machine with a plurality of rotors having peripheral rolling contact A rotary machine, such as a rotary engine, a rotary pump and the like, has a plurality of rotors which are so arranged and shaped that they roll over one another and together bound a permanently closed during rotation, working chamber. This working chambe...	04/13/1982
4173439	Apparatus having expanding and contracting chamber An apparatus having at least one alternately expanding and contracting chamber comprises a plurality of cylindrical rollers each having an exterior surface in continuous rolling engagement with two adjacent rollers, the rollers being rotatable along paral...	11/06/1979
4137021	Rotary compressor and process of compressing compressible fluids A rotary compressor and process of compressing compressible fluids wherein the compressor comprises a housing having two axially spaced walls and rotatable in relation to the housing piston and cylinder-piston journaled on eccentric portions of two opposi...	01/30/1979
4135864	Rotary compressor and process of compressing compressible fluids A rotary compressor and process of compressing compressible fluids wherein the compressor comprises a housing having two axially spaced walls and rotatable in relation to the housing piston and cylinder-piston journaled on eccentric portions of two opposi...	01/23/1979
3966367	Hydraulic motor or pump with movable wedge 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 sea...	06/29/1976

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Class 418/58 - Plural working members or chambers