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Match Document Document Title
7625192 Internal gear pump including a crescent  
To provide an internal gear pump capable of preventing small vibrations due to pressure differences at the outlet port side of a crescent disposed between the outer rotor and the inner rotor, so...
7618247 Progressive staged flow to precompress the pump internal volume/volumes to be displaced  
Besides the conventional pump timing in rotary hydraulic devices, a series of constant and variable restrictions have been applied to condition the pressurized flow used to internally precompress...
7591637 G-rotor pump  
Disclosed is a G-rotor pump in which a lid and a bottom of a pump housing are made of plastic. A spacer that supports the bottom is produced as a single piece with the lid, whereby the G-rotor pump...
7588429 Oil pump rotor assembly  
An oil pump rotor assembly is disclosed. An inner rotor formed with n external teeth is based on cycloid curves which are generated by a first circumscribed-rolling circle and a first...
7572117 Inner rotor of internal gear pump having convex small circular arc parts  
A crankshaft and an mounting hole have two main circular arc parts on the same circle; and two connecting parts for connecting the adjacent main circular arc parts, and have a cross-sectional shape...
7520738 Closed system rotary machine  
A closed system rotary machine has an inner shaped element ( 1 ) and an outer shaped element ( 2 ) which define therebetween cavities or capsules having a variable volume (V 1 , V 9 ). The contact...
7513760 Oil pump of scroll compressor  
An oil pump of a scroll compressor is provided. The oil pump includes a pump body to which a drive shaft is inserted; a gear unit inserted to a lower side of the pump body and rotating by the...
7503757 Oil pump having rotor receiving portion for restriction moving range of an outer rotor in a direction perpendicular to an eccentric direction  
An oil pump includes a housing including a rotor receiving portion at an inner side and an inner rotor accommodated in the rotor receiving portion formed at the housing. The inner rotor includes a...
7494329 Oil pump for a compressor  
An oil pump for a compressor is provided. The oil pump includes a pump body coupled to a driving shaft, and a pumping member coupled to the pump body so as to define a pumping part and a pump cover...
7488163 Trochoid oil pump  
A trochoid oil pump, which enables the endurance to be increased and the reduction of discharge pulsations and noise to be achieved, and in which those results can be realized with a very simple...
7476093 Oil pump rotor assembly  
A rotor pump assembly is disclosed which reduces noise emitted from an oil pump while preventing pumping performance and mechanical efficiency thereof from being decreased by properly forming the...
7472677 Energy transfer machine  
An energy transfer machine, for example, a positive displacement internal combustion device, has a fixed outer housing, an internal rotating carrier and one or more inner rotors with rotational...
7445438 Torque limited lube pump for power transfer devices  
A lube pump is provided for supplying lubricant to various components of a power transmission unit of the type used in motor vehicles. The lube pump includes a pump assembly and a coupling...
7438542 Fluid pump assembly  
A fluid pump assembly comprises a pump housing and a fluid pump disposed within the pump housing. The fluid pump has axially opposite first and second side faces and includes cooperating impeller...
7427192 Toothing of a toothed wheel  
A toothing of a toothed wheel, consisting of tooth tips and tooth roots of teeth which are formed by second or higher order curves, wherein said curves point tangentially toward each other at their...
7427191 Oil pump  
In an oil pump employing a cam ring, and inner and outer rotors in meshed-engagement, two housings are provided at opposite ends of the cam ring. A plurality of volume chambers are defined between...
7410349 High efficiency gerotor pump  
A pump assembly includes a pump housing, a stator ring supported within the pump housing, and a pump ring also rotatably supported within the pump housing. The pump ring interfaces with the stator...
7407373 Internal gear pump and an inner rotor of such a pump  
An inner motor is structured to increase the discharge rate of an internal gear pump by making it possible to freely adjust the eccentricity e between the inner and outer rotors. Each tooth of the...
7399171 Rotary pump for braking device  
The curvature of a circular arc constituted by a side of a suction groove is made larger than that of a circular arc constituted by a side of a discharge groove. Thus, when the suction groove and...
7390180 Oil pumping device of hermetic compressor  
A hermetic compressor uses an oil pump that includes a trochoid gear. Therefore, regardless of the rotation speed of a driving motor of the compressor, a sufficient amount of oil can always be...
7374411 Oil pump adapted to prevent leakage without using sealing member  
An oil pump is provided which includes a cam ring made of a material having a first line expansion coefficient, a pump element rotatably disposed in the cam ring and smaller in an axial length than...
7367782 Pump plate of a rotary feed pump  
In a pump plate ( 26 ) of a feed pump, an inlet port ( 26 b ) and an outlet port ( 26 c ) are formed around a shaft hole ( 26 a ) through which a driving shaft is inserted, and a rib ( 26 f ),...
7347678 Friction reducing seal ring for gear pump  
A seal ring for improving the performance of a gear pump, primarily for vehicle transmissions, comprises the milling of a circular ring on at least one lateral face of an inner gear and an outer...
7290995 Tandem type trochoid pump and method of assembling the same  
A tandem type trochoid pump is comprised of a drive shaft having a non-circular end portion, a spacer positioned between a first trochoid pump and a second trochoid pump in a housing body, a first...
7278841 Gerotor pump  
Improved gerotor pumps comprising laterally constrained floating rings, thereby providing an orthogonal degree-of-freedom and allowing gerotor sets positioned therein to establish their own...
7241122 Internal gear pump with recesses on the gear bearing surfaces  
A positive-displacement pump, in particular for use in machines or dispensing fluids, including two elements that are with respect to one another and which mesh with one another ( 20, 30 ), each of...
7220111 Hydraulic pump  
A fluid pump includes a housing having a lateral wall and an end wall, an insert located in the housing surrounded by the lateral wall and including a body having a central aperture and inlet and...
7195467 Internal gear machine with variable capacity  
A fluidic machine has a fixed body, an external orbital member rotatable around a first rotational axis and internal gear teeth including a first teeth number, a transmission member rotatable...
7165955 Trochoid type oil pump  
It is an object of the present invention to provide a trochoid type oil pump in which erosion of the rotor surfaces caused by cavitation is minimized, vibration and noise are reduced, and the...
7153110 Variable volume flow internal gear pump  
Rotational pump with variable volume flow, comprising a pump housing having a suction connection and a pressure connection, an outer rotor with inner toothing which is rotatably disposed inside the...
7137793 Magnetically driven gear pump  
A magnetically driven gear pump having a housing, a rotatable annular magnetic drive assembly magnetically coupled to but spaced from an annular driven magnet and rotor gear assembly with an...
7118359 Oil pump rotor  
An oil pump rotor assembly for an oil pump which enables reduction of noise while preventing pump performance and mechanical efficiency from being degraded. In this oil pump rotor assembly, the...
7111606 Rotary positive displacement device  
A device to convert energy having exterior and interior rotors where the number of legs (Λ) of an interior rotor divided by the number of chambers (X) defined by the fins of the outer rotor is...
7074025 Fluid delivery device  
A fluid delivery device, such as a geared machine or a gear pump, with a housing having at least one supply chamber and a displacement unit arranged within the supply chamber. The displacement unit...
7052258 Trochoidal pump  
To reduce noise caused by pulsation generated when fluid is expelled, in a trochoidal pump comprising an inner rotor and outer rotor having trochoidal toothed shapes. [Means of Solution] The inner...
7052257 Internal gear pump  
The invention relates to an internal gear pump for delivering fuel in an internal combustion engine, with an internally toothed annular gear and an externally toothed pinion that cooperates with...
7048524 Internal gear pump with recesses on the gear bearing surfaces  
A positive-displacement pump, in particular for use in machines or dispensing fluids, including two elements that are with respect to one another and which mesh with one another ( 20, 30 ), each of...
7008200 Gerotor apparatus for a quasi-isothermal brayton cycle engine  
According to one embodiment of the invention, a gerotor apparatus includes an outer gerotor having an outer gerotor chamber, an inner gerotor, at least a portion of which is disposed within the...
6974315 Reduced friction gerotor  
An oil pump for a vehicle engine. The oil pump includes an oil pump housing and a gerotor. The oil pump housing includes a cavity that defines an inside diameter. The gerotor is positioned within...
6905321 Rotary pump for braking apparatus  
In a rotary pump for a braking apparatus, a discharge trench is formed on an axial direction end surface of a second side plate that forms a mechanical seal. As a result, rotors are pressed back...
6896500 Gear pump  
A bottom portion of an intake port is provided with a sloped bottom surface formed of a plane such that sloped bottom surface approaches the side surfaces of external teeth and internal teeth from...
6893239 Internal geared wheel pump having asymmetric tooth tips  
The invention relates to an internal geared wheel pump without a filler piece, comprising a housing, an internal geared wheel ( 3 ) which rotates in the housing and an external geared pinion ( 2 )...
6893238 Ring gear machine clearance  
A displacement-type ring gear machine includes a casing including a gear chamber comprising a supply port and a discharge port, an internal gear accommodated in the gear chamber and comprising an...
6887056 Oil pump rotor  
An oil pump emits less noise by properly forming the profiles of teeth of an inner rotor and an outer rotor thereof which engage each other, whereby decreasing sliding resistance and rattle between...
6887054 Transition valving by means of non-return valves  
A rotary fluid pressure device has a first oil passage with relatively high pressure fluid therein surrounding the gear set; a plurality of second oil passageways connecting the first oil...
6886326 Quasi-isothermal brayton cycle engine  
An engine includes a compressor, and combustor, and an expander. The compressor compresses ambient air. The combustor burns the compressed air, and produces exhaust gasses. The expander receives...
6835054 Oil pump  
A pump chamber defines a capacity increased in a first certain angle range and decreased in a second certain angle range. An intake port is open in an increase range where the pump chamber moves...
6783341 Pair of interacting gear rims of the rotary machine  
A pair of interacting gear rims of rotary machine has been invented as a basic structural element for engines, motors and compressors. This is the most simple and most effective design to...
6783193 Rotary pump and braking apparatus using rotary pump  
A rotary pump such as a trochoid pump is composed of a housing and a rotating structure including an inner rotor and an outer rotor. The rotating structure is rotatably enclosed in a rotor space...
6769889 Balanced pressure gerotor fuel pump  
A gerotor pump for pressurizing gasoline fuel is capable of developing pressures up to 2.0 MPa with good mechanical and volumetric efficiency and satisfying the durability requirements for an...
Matches 1 - 50 out of 278 1 2 3 4 5 6 >