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9039397 Rotor for oil pump with different contours for the drive-side versus non-drive side of the teeth  
A rotor for an oil pump according to the present invention is a rotor that includes an inner rotor configured by teeth, each of which has a plurality of ellipses or circles, and an outer rotor...
9039398 Internal gear pump having a lubricant feed from the suction region  
An internal gear pump includes a ring gear and a pinion configured to mesh with the ring gear. The ring gear and pinion delimit a pump chamber extending from a suction region to a pressure region....
9039539 Arrangement for transmitting a torque between a shaft and a hub  
An arrangement transmits a torque between a shaft and a hub. The hub has at least approximately the interior geometry of an equilateral n-sided polygon, the side surfaces of which at least...
9039396 Piston and scroll compressor assembly  
A compressor is provided and may include a shell, a motor assembly, a drive shaft, a first compression mechanism, and a second compression mechanism. The motor assembly may be disposed within the...
9033107 Oil pump arrangement in a transmission  
An arrangement of an oil pump (8) and its drive in a transmission (1) that has a transmission housing (2) and at least one transmission shaft (3). The oil pump (8) is arranged coaxially with the...
9033690 Scavenge gear pump  
A scavenge gear pump and its method of operation is described. The scavenge gear pump includes a pump housing defining a pump chamber, an inlet passage, an outlet passage, and a fluid injection...
9033689 Scroll refrigeration compressor including heat shield, bypass passage, and bypass valve  
The scroll refrigeration compressor includes a sealed casing, stationary and moving volutes including spiral wraps engaged in one another and defining the variable-volume compression chambers, a...
9032728 Supercharger lubricating structure for internal combustion engine  
A supercharger lubricating structure for an internal combustion engine is provided that can supply oil to a supercharger through a short oil passage without use of external piping and downsize a...
9028232 Internal gear pumps for a hydraulic vehicle braking system  
An internal gear pump for a slip-controlled hydraulic vehicle braking system includes a pinion, a ring gear, and a filler piece (sickle). The filler piece has an inner part extending in a curved...
9028233 Rotary piston pump and method for operating a rotary piston pump  
A rotary piston pump equipped with a motor having two counter-rotating rotary pistons. The two rotary pistons are housed in an oval pump housing. The two rotary pistons are arranged on a first...
9028231 Compressor, engine or pump with a piston translating along a circular path  
Described herein is a device comprising: a chamber wall comprising outer and inner surfaces, wherein the inner surface encloses a lobed chamber with a plurality of lobes and the inner surface...
9028230 Three stage scroll vacuum pump  
A three stage vacuum pump has three stages of fixed scrolls and orbiting scrolls that operate simultaneously. A motor drives the second orbiting scroll within the third fixed scroll upon three...
9027528 Rotary internal combustion engine  
A rotary engine having a main block with a cylindrical cavity, a rotor having at least one divisor having at least one ring for rotably engaging a main axis. The divisors having an edge slidably...
9027345 Compound engine system with rotary engine  
A compound engine system comprising a rotary engine having a volumetric compression ratio lower than its volumetric expansion ratio, and a recess defined in the peripheral wall of the rotor in...
9022759 Capacity modulated scroll compressor  
A compressor including a housing defining a suction pressure region and a discharge pressure region includes first and second scroll members forming compression pockets. A first chamber located on...
9022005 Rotary engine  
In a “cat and mouse” rotary engine two rotor-pistons are connected by concentric crosses to two inclined power shafts, improving the balance of the engine, ridding the bearings of the...
9022758 Floating scroll seal with retaining ring  
A scroll compressor that includes a housing and scroll compressor bodies disposed in the housing as well as a method of operation thereof is provided. The housing is separated into different...
9022761 Elliptical gear pump fluid driving apparatus  
Elliptical or oval shaped gears of a positive displacement gear pump are disclosed. The gears have specially designed teeth at the ends of the gears' major and minor diameter axes. For example the...
9022756 Scroll compressor  
A scroll compressor is provided with a buffer portion (113b) having an increased diameter at an intermediate part of a discharge port (113). A refrigerant discharged from compression chambers (p)...
9022757 Compressor  
A compressor is provided that includes an accumulator formed in an internal space of a shell to reduce a size of the compressor. An accumulator space may be formed using the shell of the...
9022760 High pressure seal vent  
A compressor for compressing refrigerant in a refrigerant circuit includes a housing defining a compression chamber. A screw rotor is mounted within the housing and configured to form a pocket of...
9022748 Screw compressor  
A screw compressor including a driving machine having an output shaft coupled to an input shaft of a compressor main body; a clutch mechanism between the output shaft of the driving machine and...
9017048 Variable capacity type rotary compressor, cooling apparatus having the same, and method for driving the same  
A variable capacity type rotary compressor and a cooling apparatus having the same, and an operation method thereof are provided. In the variable capacity type rotary compressor and the cooling...
9017052 Positive displacement pump with improved rotor design  
An improved positive displacement pump provides improved wear characteristics. Specifically, rotor pads are provided on faces relative to an internal portion of the rotor housing as it relates to...
9017049 Variable displacement lubricant pump  
A variable displacement lubricant pump for providing a pressurized lubricant for an internal combustion engine includes a shiftable control ring. The control ring comprises a plurality of pump...
9017051 Rotary vacuum pump with a discharge compensating channel  
A rotary vacuum pump includes a suction chamber (12) in a housing (10). A rotor (14) is eccentrically mounted in the suction chamber (12). Sliding vanes (18) are connected to the rotor (14)....
9017050 Scroll refrigeration compressor with anti-return device  
The scroll refrigeration compressor includes a stationary volute and a moving volute provided with spiral wraps defining variable-volume compression chambers, a separating member sealably mounted...
9011123 Swinging abutment rotary pump  
A rotary pump device includes a stator chamber with a cylindrical inner wall having intake and exhaust ports and a swinging abutment mounted therein, and a rotor eccentrically mounted on an axial...
9011121 Refrigerant compressor and heat pump apparatus  
A device that enhances compressor efficiency by reducing pressure losses in a discharge muffler space into which is discharged a refrigerant compressed by a compression unit. A low-stage discharge...
9011120 Scroll compressor with bearing grooves on both sides of key groove  
In a scroll compressor of the present invention, a fixed scroll 11 and an orbiting scroll 12 are meshed with each other such that spiral laps of the fixed scroll 11 and the orbiting scroll 12...
9011124 Positive displacement fluid machine having a pivot single vane passing through an orbiting piston  
An enclosed positive displacement mechanism including a body with an inlet and an outlet; a rotor mounted in the body and rotatable about a main axis; an orbiting piston located in the cavity,...
9011122 Stator seal structure in uniaxial screw pump  
There is provided a stator seal structure in a uniaxial eccentric screw pump by which the abrasion resistance of sealing mechanisms is improved and the pumped fluid can be prevented from...
9011119 Variable displacement pump  
A variable displacement pump includes: a discharge opening formed at a position to confront a discharge region; a back pressure introduction groove formed on the suction region side; and a...
9011125 Vane pump  
A vane pump includes at least one vane, a pump housing with a bottom and a lid, and a rotor rotatably mounted in the pump housing, with the at least one vane being slidingly mounted in a groove in...
9004889 Internal gear pump  
An internal gear pump includes an inner rotor having n teeth and an outer rotor having (n+1) teeth. A tooth profile of the inner rotor is an envelope of a group of locus circles (13) each having a...
9004891 Vacuum pump  
A pair of Northey rotors for a vacuum pump, in which each rotor comprises two opposing, substantially parallel faces, and a peripheral surface located between the opposing faces. In order to...
9004888 Rotary compressor having discharge groove to communicate compression chamber with discharge port near vane groove  
A rotary compressor includes a compression unit that includes an annular cylinder including a cylinder inner wall, a suction port, and a vane groove, an end plate covering an end portion of the...
9004890 Gear wheel pump  
The invention relates to a gear wheel pump with two meshing gear wheels which are rotatably mounted within a pump housing by means of a driven driveshaft and a crankshaft journal and which form a...
9004882 Variable displacement vane pump having multiple dampening springs  
A variable displacement pump includes: a first urging member arranged to urge the cam ring in a direction to increase the eccentric amount; a second urging member arranged to urge the cam ring in...
9004887 Thrust plate for a horizontal scroll compressor and a horizontal scroll compressor having the same  
A thrust plate for a compressor may include first and second ends and a feed hole. The first end may include a thrust surface. The second end may include a lubricant accumulation feature. The feed...
8998596 Scroll compressor  
A scroll compressor includes a pressing mechanism and a back-flow prevention mechanism. The pressing mechanism includes a back-pressure chamber facing a back surface of a movable-scroll end plate,...
8998597 Compressor, engine or pump with a piston translating along a circular path  
Described herein is a device comprising: a chamber wall comprising outer and inner surfaces, wherein the inner surface encloses a lobed chamber with a plurality of lobes and the inner surface...
8998595 Scroll compressor with passage in the spiral wrap  
[Object] To provide a scroll compressor capable of improving compression efficiency. [Means of Solution]In a scroll compressor 1, a fixed scroll 16 includes a fixed base plate 16c, and a fixed...
8998594 Vane cell pump with vane plate guide crosspieces and synchronization cylinder  
The invention relates to a vane cell pump, having a rotor mounted in a pump housing and driven by a shaft, multiple vane plates mounted in this rotor in radially displaceable manner, and an outer...
8992193 Shaft assembly including a contained shaft spring load  
An input shaft assembly is movable along an axis to absorb external impact loads. A biasing member exerts an axial load in a direction counter to potential impact loads. A stop is provided to...
8992194 Rotation device including seal structure  
A seal member is configured so that an annular rubber member is disposed in an annular storage chamber of a resin annular member. Thus, the rubber annular member is not directly in contact with a...
8992184 Lubricant pump system  
A lubricant pump system may include a lubricant pump controlled by a proportional valve. An actuating unit may be disposed in the lubricant pump and configured to control a delivery output of the...
8992195 Screw compressor including a single screw rotor with first and second screw groove being bilaterally symmetric  
A screw compressor includes a rotatable screw rotor and a plurality of gate rotors. The screw rotor has helical grooves formed in an outer circumferential surface of the screw rotor. The gate...
8992188 Revolution type compressor  
In a revolution type compressor using a balance weight for balancing a rotating mass, the effect of oil churn reduction is enhanced, and compressor input is reduced. A balance weight fixed to a...
8992191 Scroll compressor with differential pressure hole  
A scroll compressor is provided that may include a differential pressure hole formed at or in an orbiting scroll that communicates a high pressure part with an intermediate pressure part, a...