Class / Patent application number | Description | Number of patent applications / Date published |
418610100 | Circumferentially spaced working chambers | 73 |
20080240958 | Rotary Fluid Machine - A rotary fluid machine includes a first rotation mechanism and a second rotation mechanism. Each of them includes a cylinder having a cylinder chamber and an annular piston which is contained in the cylinder chamber and divides the cylinder chamber into an outer working chamber and an inner working chamber. The cylinder goes rotates around the piston. The first rotation mechanism and the second rotation mechanism are arranged to be adjacent to each other with a partition plate sandwiched therebetween. The cylinder of the first rotation mechanism and the cylinder of the second rotation mechanism are arranged such that one of the cylinders is provided at one side of a partition plate and the other is provided at the other side of the partition plate. Each of the first rotation mechanism and the second rotation mechanism is provided with a compliance mechanism for reducing a gap that occurs between the cylinders in the axial direction of the drive shaft. | 10-02-2008 |
20080267805 | Rotary engine combustion chamber - An apparatus for facilitating combustion in a rotary engine with planetary rotors orbiting inside a housing containing a main rotor. In various embodiments, the planetary rotor has a multi-faceted face that engages a bridge during the transition from the compression cycle to the combustion cycle with the bridge and face forming a dynamic seal; the planetary rotor has a face engaging a bridge during the transition from the compression cycle to the combustion cycle such that the bridge and face have a gap that allows gas flow from the trailing volume to the leading volume and the gap is sufficiently small to quench flame propagation from the leading volume to the trailing volume; and/or the face of the planetary rotor opposite a fuel injector has a pocket that allows the fuel cloud to expand without impinging or wetting the face of the planetary rotor. | 10-30-2008 |
20080274000 | Pump, Especially Slurry Pump - The aim of the invention is to provide a simple, smoothly running pump, especially a slurry pump, preferably for concrete, which comprises a driven rotor ( | 11-06-2008 |
20090123316 | Gear pump - A pump comprises a driving rotor and a driven rotor that are positioned in a housing such that, as the driving rotor and the driven rotor rotate, the teeth of the driving rotor and the teeth of the driven rotor mesh to form a positive displacement seal. The teeth of the driving rotor and the driven rotor are configured such that seals between the inlet side and the discharge side of the pump are formed between only the leading surfaces of the teeth of the driving rotor and the trailing surfaces of the teeth of the driven rotor. | 05-14-2009 |
20100150761 | HYDRAULIC MACHINE - The invention relates to a hydraulic machine comprising a housing section with a housing, a commutation section and a gear wheel section, the gear wheel section comprising a gear wheel set with an internally toothed gear ring and an externally toothed gear wheel, which engage each other and form working chambers that are connected to at least one inlet connection and at least one outlet connection via the commutation section that comprises a rotary slide valve and a valve plate. It is endeavoured to provide such a hydraulic machine that requires only little space. For this purpose, a sealing is arranged between the rotary slide valve and the housing. | 06-17-2010 |
20140065001 | INTERNAL ORBITAL ENGINE - An orbital engine with a first outer generally tubular body with a first axis, and a second generally tubular inner orbiter body with a second axis, the second inner body being moveable within the first outer body. The first and second axes are parallel, but not colinear. The second inner body revolves, but does not rotate, within the first outer body Vanes extending generally radially relative to both the inner and outer bodies define multiple chambers in the space between the outside of the inner body and the inside of the outer body. The vanes reciprocate relative to both the inner and outer bodies, and no vane traverses the entire inner surface of the outer body. When fitted with ports in the outer body and valves, the orbital engine may be implemented as an internal combustion engine, gas compressor, liquid pump, air motor, blower, fan or turbine, etc. | 03-06-2014 |
20140255234 | Pump System - One embodiment of the pump system includes a cover housing and a main body affixed to one another for operation. A drive and idler gear may be mounted within a gear chamber in the main body for rotation there about, and inlet fluid may be provided on both the axial and radial surfaces of the drive and idler gear. The cover housing may be outfitted with one pressure relief channel or with two pressure relief channels of different geometric sizes and with different actuation pressures. The drive and/or idler gear may have dimples fashioned on an axial surface thereof, and lubricant troughs may be fashioned at various locations in the main body and/or the cover housing to reduce wear within the pump. | 09-11-2014 |
20150322942 | OIL PUMP, ENGINE COVER AND ENGINE COMPRISING THE SAME - An oil pump is provided. The oil pump comprises: a shell; a rotor mounting part on the shell and having a rotor supporting structure; and a rotor mechanism disposed on the rotor mounting part. The shell has an inlet and an outlet and defines a low-pressure oil chamber and a high-pressure oil chamber. A partition wall is disposed between the low-pressure oil chamber and the high-pressure oil chamber for separating the low-pressure oil chamber and the high-pressure oil chamber. An engine cover comprising the oil pump and an engine comprising the engine cover are also provided. | 11-12-2015 |
418610200 | Rotor has one more lobe than cylinder (i.e., Wankel type) | 12 |
20090010790 | Sliding Vane of Rotors - The present invention provides a sliding vane, which is provided through a rotor in a cylinder and reciprocates in a diametrical direction and rotates together with the rotor. The sliding vane of the present invention includes a vane body (10), which has plate seating slots ( | 01-08-2009 |
20110262291 | Rotor Assembly for Rotary Compressor - A traditional compressor unit of the sealed type suffers in that a failure of either the motor or the compressor require both to be discarded Provided is a compressor ( | 10-27-2011 |
20130028771 | OIL SEAL ARRANGEMENT FOR ROTARY INTERNAL COMBUSTION ENGINE - A rotor of a rotary internal combustion engine, including an annular oil seal assembly snugly received within each oil seal groove, each oil seal assembly including a seal ring retaining first and second axially spaced apart annular sealing elements in substantial radial alignment with one another, the seal ring radially pressing each of the sealing elements in sealing engagement with a respective surface in the groove in opposite directions from one another, and a spring member biasing the seal ring axially away from the end face. | 01-31-2013 |
20130028772 | 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 each of the chambers having a volume of more than 5% of the displacement volume of the chamber. The expansion in the turbine section compensates for the relatively low expansion ratio of the rotary engine. | 01-31-2013 |
20130028773 | APEX SEAL FOR ROTARY INTERNAL COMBUSTION ENGINE - A rotor of a rotary internal combustion engine including apex springs each being formed of a continuous band including first and second opposed end sections each contacting the inner surface of the apex seal adjacent to a respective one of the end faces, a respective intermediate section extending radially inwardly from each end section and contacting the outer surface of the groove along a respective contact zone, and a central section extending axially between the intermediate sections and having a portion extending radially outwardly from each of the intermediate sections, the central section extending out of contact with both the outer surface of the groove and the apex seal. | 01-31-2013 |
20130028774 | ROTARY INTERNAL COMBUSTION ENGINE WITH PHASING GEAR - In one aspect, described is a rotor of a rotary internal combustion engine, including a phasing gear with an annular meshing section including a plurality of radially inwardly oriented teeth and an annular attachment section connected to the meshing section and coaxial therewith, the attachment section being offset axially inwardly from the teeth and having at least a portion thereof located radially inwardly of the teeth, and a fastener apparatus connecting the phasing gear to the rotor body, the fastener apparatus engaging the rotor body radially inwardly of the teeth. | 01-31-2013 |
20130028775 | APEX SEAL ARRANGEMENT FOR ROTARY INTERNAL COMBUSTION ENGINE - In one aspect, described is a rotor for a Wankel engine comprising two circumferentially spaced apart apex seals at each of the apex portions with each apex seal protruding axially from both end faces, and each apex seal having a first biasing member biasing the apex seal radially outwardly away from the peripheral face of the body, and a second biasing member biasing the apex seal axially outwardly away from a respective one of the end faces, the two apex seals of a same one of the apex portions being biased by the respective second biasing member in opposite axial directions from one another. | 01-31-2013 |
20130028776 | APEX AND FACE SEALS WITH ROTARY INTERNAL COMBUSTION ENGINE - In one aspect, described is a rotor for a rotary internal combustion engine where a first face seal biased axially outwardly away from the first end face has opposed curled ends abutting a first seal element of a respective one of the adjacent apex seal assemblies, and a second face seal biased axially outwardly away from the second end face has opposed curled ends abutting a second seal element of a respective one of the adjacent apex seal assemblies. | 01-31-2013 |
20130028777 | GAS SEAL ARRANGEMENT FOR ROTARY INTERNAL COMBUSTION ENGINE - A rotor of a rotary internal combustion engine, with each of the end faces having at each of the apex portions a recess defined therein in communication with the at least one apex groove, an end seal received in the recess in sealing engagement with the apex seal of each of the at least one apex groove, a first seal member in sealing engagement with the end seal and with the face seal of the face groove defined between the apex portion and a first one of the adjacent apex portions, and a second seal member in sealing engagement with the end seal and with the face seal of the face groove defined between the apex portion and a second one of the adjacent apex portions. | 01-31-2013 |
20130236345 | COMPRESSOR UNIT INCLUDING GEAR ROTOR AND COMPRESSOR SYSTEM USING THE SAME - A compressor unit having a gear rotor, and a compressor system using the same are provided. The compressor system includes a compressor unit having a triple trochoidal rotor, which includes a first rotor, a second rotor, a third rotor, a casing, second and first suction ports, and second and first discharge ports; and a driving unit that rotates the three rotors such that external working fluid is sucked into the suction port and the working fluid sucked into the suction port is discharged to the discharge port in a state of being compressed. The compressor unit may be constructed as a triple trochoidal rotor such that working fluid can be compressed in a two-stage compression manner to enable the working fluid to be supplied at high pressure and provide a high-speed, high-pressure compression capability. | 09-12-2013 |
20140341769 | PUMP ROTOR AND INTERNAL GEAR PUMP USING THE SAME - A tooth profile of an inner rotor | 11-20-2014 |
20150017044 | ROTARY PISTON ENGINE AND METHOD FOR PRODUCING A ROTARY PISTON ENGINE - A rotary piston engine comprises a stationary housing and a piston movably accommodated in the housing. The housing and the piston form at least one chamber with a chamber surface. At least one partial portion of the chamber surface has a thermal barrier coat for reducing a thermal conductivity of the partial portion of the chamber surface. At least one partial portion of the chamber surface has a metallic spray coat. A method for producing such a rotary piston engine can also be achieved. | 01-15-2015 |
418610300 | Rotor has one less lobe than cylinder (i.e., Gerotor type) | 53 |
20080240959 | BRAKE RELEASING MECHANISM AND BRAKE SYSTEM - An embodiment of a gerotor apparatus includes a housing including a first member. The first member includes a brake pin aperture formed therein. The apparatus also includes a brake pin at least partially interposed within the first member. The brake pin includes a first annular surface and a second annular surface. The first annular surface defines, at least in part, a first brake chamber. The second annular surface defines, at least in part, a second brake chamber. A first fluid introduced into the first brake chamber will urge the brake pin in a first direction. A second fluid introduced into the second brake chamber will urge the brake pin generally in the first direction. | 10-02-2008 |
20080240960 | Pump - A pump assembly including a gerotor pump having an inlet and an outlet, and comprising an annulus and a lobed rotor, one, but not both, of the rotor or annulus being split axially into two parts, the pump further comprising indexing means for angularly shifting one part relative to the other part, the indexing means comprising a chamber having a first indexing port and a second indexing port, and a partition which divides the chamber into a first portion including the first indexing port and a second portion including the second indexing port, wherein the partition comprises a part which is pivotally mounted within the chamber for angular movement within the chamber. | 10-02-2008 |
20090087333 | Gerotor pump - A gerotor pump comprises a rotor chamber having a longitudinally extending central axis, an outer rotor rotatable in the rotor chamber with a radial clearance between an outer periphery of the outer rotor and the rotor chamber, an inner rotor rotatable in the outer rotor and cooperably engageable therewith to define a plurality of pumping chambers having respective volumes that vary when, in use, the inner rotor rotates relative to the outer rotor. The inner rotor is rotatable about an axis of rotation spaced from the central axis and contained in a first plane that contains the central axis and the rotor chamber is configured such that the radial clearance in at least one direction in the first plane is greater than at least one radial clearance in a second plane that extends perpendicular to the first plane and contains the central axis. | 04-02-2009 |
20090116989 | Oil pump rotor - An oil pump rotor for use in an oil pump includes an inner rotor having (n: “n” is a natural number) external teeth, an outer rotor having (n+1) internal teeth meshing with the external teeth, and a casing forming a suction port for drawing a fluid and a discharge port for discharging the fluid, such that in association with meshing and co-rotation of the inner and outer rotors, the fluid is drawn/discharged to be conveyed according to volume changes of cells formed between teeth faces of the two rotors. For a tooth profile formed of a mathematical curve and having a tooth addendum circle A | 05-07-2009 |
20090291009 | Rotary piston machine - A rotary piston machine | 11-26-2009 |
20090317277 | COOLING SYSTEM FOR GEROTOR MOTOR - A hydraulic motor having a cooling system includes a stator, a rotor that rotates and orbits in the stator, a drive link connected to the rotor, and a housing connected with the stator. The housing includes a working fluid inlet port, a working fluid outlet port, a cooling fluid inlet port, and a cooling fluid outlet port. Each port extends through the housing and is configured to connect with a different associated external fluid line. Pressurized fluid enters the working fluid inlet port to rotate and orbit the rotor en route to the working fluid outlet port. The cooling fluid ports are isolated from the working fluid inlet port and the working fluid outlet port within the housing. | 12-24-2009 |
20100003152 | Gerotor apparatus for a quasi-isothermal brayton cycle engine - According to one embodiment of the invention, a gerotor apparatus includes a first gerotor, a second gerotor, and a synchronizing system operable to synchronize a rotation of the first gerotor with a rotation of the second gerotor. The synchronizing system includes a cam plate coupled to the first gerotor, wherein the cam plate includes a plurality of cams, and an alignment plate coupled to the second gerotor. The alignment plate includes at least one alignment member, wherein the plurality of cams and the at least one alignment member interact to synchronize a rotation of the first gerotor with a rotation of the second gerotor. | 01-07-2010 |
20100028186 | HYDRAULIC MACHINE - A hydraulic machine is disclosed with an externally toothed gear wheel ( | 02-04-2010 |
20100054979 | POSITIVE-DISPLACEMENT MACHINE DESIGN (VARIANTS) - In the first variant, the device comprises a stator and a rotor eccentrically mounted in the stator. A planetary train consists of large and small gear wheels. The large gear wheel is fixedly arranged on the outside of the small gear wheel and it is enabled to run around the small gear wheel of the planetary train. The stator is coupled with the large gear wheel and the rotor is coupled with the small gear wheel. In the second variant, the device comprises a stator and a rotor. The small gear wheel is fixedly arranged and the large gear wheel is enabled to run around the small gear wheel of the planetary train. The stator is coupled with the small gear wheel and the rotor is coupled with the large gear wheel. The equations describing the outlines of the stator and rotor are disclosed for the first and second variant. | 03-04-2010 |
20100129253 | OIL PUMP ROTOR - An oil pump rotor includes an inner rotor formed with n (n: a natural number) external teeth, and an outer rotor formed with n+1 internal teeth which are in meshing engagement with each of the external teeth. And the oil pump rotor is used in an oil pump that includes a casing having a suction port for drawing in fluid and a discharge port for discharging fluid and conveys the fluid by drawing in and discharging the fluid due to changes in volumes of cells formed between surfaces of the internal teeth and surfaces of the external teeth during rotations of the rotors under meshing engagement therebetween. And the tooth profile of the external teeth of the inner rotor is formed by a deformation in the circumferential direction and a deformation in the radial direction applied to a profile defined by a mathematical curve with the deformation in the circumferential direction is applied while maintaining the distance between the radius (R | 05-27-2010 |
20100158734 | INTERNAL GEAR PUMP - In an internal gear pump of the present invention, a first angle that is formed by a first straight line that connects a rotation axis of an inner rotor to a tooth tip portion of an external tooth in the rotational direction of the inner rotor and an outer rotor, and a second straight line that connects the rotation axis to a meshing portion of the external tooth is not less than 1.4 times the size and not more than 1.8 times the size of a second angle that is formed by a third straight line that connects the rotation axis to a tooth bottom of the external tooth, and the second straight line. | 06-24-2010 |
20100158735 | HYDRAULIC MACHINE - A hydraulic machine has a gear wheel ( | 06-24-2010 |
20100166590 | ROTARY FLUID PRESSURE DEVICE AND IMPROVED PARKING LOCK ASSEMBLY THEREFOR - A rotary fluid pressure device ( | 07-01-2010 |
20100178188 | GEROTOR MOTOR AND BRAKE ASSEMBLY - A hydraulic device includes a gerotor assembly, a wobble stick, an output shaft, a housing assembly, a first port in the housing assembly, a second port in the housing assembly, first brake disks, second brake disks, a piston, and a biasing member. The gerotor assembly includes a rotor and a stator. The wobble stick connects at a first end to the rotor. The output shaft connects to a second end of the wobble stick. The housing assembly receives the gerotor assembly, the wobble stick and the output shaft. The first port is in communication with the gerotor assembly. The second port is also in communication with the gerotor assembly. The first brake disks connect to the output shaft The second brake disks connect to the housing assembly The piston is disposed in the housing assembly adjacent at least one of the brake disks. The piston cooperates with the housing assembly to define a brake pressure chamber. The housing assembly and the first and second ports are configured such that pressurization of either port results in pressurization of the brake pressure chamber. The biasing member is disposed in the housing and contacts the piston. The biasing member urges the piston toward at least one of the brake disks. | 07-15-2010 |
20100215537 | Gear Pump With Improved Inlet Port - With a traditional gear pump inlet design it is difficult to fill the pumping chamber when the inlet pressure is low or the operating speed is high A gear pump ( | 08-26-2010 |
20100247360 | Gerotor Apparatus for a Quasi-Isothermal Brayton Cycle Engine - According to one embodiment of the invention, an engine system comprises a housing, an outer gerotor, an inner gerotor, a tip inlet port, a face inlet port, and a tip outlet port. The housing has a first sidewall, a second sidewall, a first endwall, and a second endwall. The outer gerotor is at least partially disposed in the housing and at least partially defines an outer gerotor chamber. The inner gerotor is at least partially disposed within the outer gerotor chamber. The tip inlet port is formed in the first sidewall and allows fluid to enter the outer gerotor chamber. The face inlet port is formed in the first endwall and allows fluid to enter the outer gerotor chamber. The tip outlet port is formed in the second sidewall and allows fluid to exit the outer gerotor chamber. | 09-30-2010 |
20100266435 | 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 outer gerotor chamber, and a synchronizing apparatus operable to control the rotation of the inner gerotor relative to the outer gerotor. The inner gerotor includes one or more entrance passages operable to communicate a lubricant into the outer gerotor chamber. | 10-21-2010 |
20100316519 | FRICTION DRIVE PUMP FOR TRANSFER CASES, ETC. - A pump having an actuator mounted on a rotatable shaft, and a pump mounted on the shaft, which is selectively engageable with the actuator. When the actuator is actuated, the pump will receive rotational force from the shaft, creating a pumping action. | 12-16-2010 |
20110085928 | GEROLLER HYDRAULIC MOTOR WITH ANTI-COGGING STRUCTURE - A hydraulic motor | 04-14-2011 |
20110091343 | DRILL MOTOR ASSEBLY - A stator for use with a drill rotor, the stator formed at least in part by a ceramic and/or cermet reinforced alloy material. | 04-21-2011 |
20110171053 | Rotary Motor for Compressible Media - A rotary motor for compressible media, containing at least one impellor and at least one stator mounted between two mutually coupled and concurrently mounted bearing plates, adjusted for a mounting of double sided led out driving shaft of the impellor on which is mounted a rotary piston mounted in a chamber of the stator equipped with sealing lids, wherein the rotary piston with elliptical crosscut is mounted into symmetrically shaped triangular chamber equipped with rounded peaks, when each of them is equipped with at least one port for an entry and an exit of the compressible media, in way that a lengthwise axe (o | 07-14-2011 |
20110189042 | Oil Pump With Dual Scavenging For a Twin Cam Engine - The present invention is an oil pump used in combination with a twin cam type engine, such as a Harley Davidson type A or type B engine, that includes a first high pressure georotor and cam chest scavenger georotor housing, a separator plate that establishes an independent dual scavenging capability and a second crankcase sump scavenger georotor housing that pulls oil from the crankcase sump. The oil pump also includes a high pressure georotor that pulls oil from an oil reservoir and supplies oil under pressure through a stock or aftermarket cam plate to the engine, a cam chest scavenger georotor to scavenge oil in a cam chest of the engine and return the oil to the oil reservoir, a crankcase sump scavenger georotor to scavenge the oil in a crankcase sump of the engine and return the oil to the oil reservoir and an o-ring to prevent the oil from leaking into the cam chest of the engine. | 08-04-2011 |
20110200476 | GEROTOR APPARATUS FOR A QUASI-ISOTHERMAL BRAYTON CYCLE ENGINE - According to one embodiment of the invention, a gerotor apparatus includes a first gerotor, a second gerotor, and a synchronizing system operable to synchronize a rotation of the first gerotor with a rotation of the second gerotor. The synchronizing system includes a earn plate coupled to the first gerotor, wherein the cam plate includes a plurality of cams, and an alignment plate coupled to the second gerotor. The alignment plate includes at least one alignment member, wherein the plurality of cams and the at least one alignment member interact to synchronize a rotation of the first gerotor with a rotation of the second gerotor. | 08-18-2011 |
20110206549 | Bi-Rotational Hydraulic Motor With Optional Case Drain - A bi-rotational hydraulic motor having a selectively pluggable case drain with check valves incorporated into the thrust plate allowing excess lubrication fluid to pass from the bearings into the outlet port of the motor. | 08-25-2011 |
20110217199 | DOWNHOLE POSITIVE DISPLACEMENT MOTOR - A downhole positive displacement motor converts hydraulic fluid pressure into rotational torque. The motor includes a non-helical rotor and stator, and upper and lower valve assemblies each comprising cylindrical rotating and stationary elements which define longitudinal passages. The timing of alignment of the passages creates pressure in power pockets in the stator, rotating the rotor. The rotational torque can be used in any application that may require mechanical force to operate or drive a mechanism created for oil, gas, or water production in a down hole application. | 09-08-2011 |
20110250086 | FRAME ROTATED HYDRAULIC MOTOR WITH IMPROVED PARKING BRAKE - A rotary fluid pressure device includes a gerotor gear set having a ring gear and a star gear orbitally moveable about a longitudinal axis relative to the ring gear. The star gear includes an annular spacer ring disposed at one end of the star gear. A brake pin is moveable along the longitudinal axis into and out of interlocking engagement with the annular spacer ring. The brake pin includes an outer surface for engaging an interior surface of the spacer ring. The outer surface of the brake pin and the interior surface of the spacer ring are each angled relative to the longitudinal axis to engage each other in a tapered engagement, to generate an axial force along the longitudinal axis to move the brake pin out of engagement with the star gear in response to a torque being applied to the star gear. | 10-13-2011 |
20120251370 | INTERNAL GEAR PUMP - An internal gear pump for delivering a fluid, in particular one of the gerotor pump type, having a driven gear wheel, a rotatable annular gear interacting with the gear wheel, and a substantially cylindrical housing, in which the gear wheel and the annular gear are arranged. The housing has a base portion, an annular portion and a cover portion, the base portion having a pressure port, which forms a delivery chamber of the pump or opens into the latter. A thrust ring is arranged between the gear wheel and the annular gear on the one hand and the cover portion of the housing on the other. At least one connecting passage on or in the housing of the pump extends from the delivery chamber of the pump up to a gap between the thrust ring and the cover portion of the housing, in order to carry fluid from the delivery chamber into the gap. | 10-04-2012 |
20130028778 | STATOR OF A GEROTOR DEVICE AND A METHOD FOR MANUFACTURING ROLLER POCKETS IN A STATOR OF A GEROTOR DEVICE - A method for manufacturing roller pockets in a stator of a gerotor device generally includes providing a stator having a cavity including a generally cylindrical section defining a central axis and a plurality of roller pockets angularly spaced around a periphery of the cylindrical section. Each roller pocket is configured to receive a respective roller, which acts as an internal tooth of the gerotor device. Each roller pocket defines a generally cylindrical roller pocket bearing surface. The method further includes grinding each roller pocket bearing surface of each roller pocket with a grinding wheel rotating about a rotational axis perpendicular to the central axis. A stator for a gerotor device is also described. | 01-31-2013 |
20130149180 | INTERNAL GEAR PUMP - In an internal gear pump that includes an inner gear having outer teeth and an outer gear having inner teeth, either the inner or outer teeth have a shape based on a tooth shape that is respectively formed by a generating curve of the outer or inner teeth. The inner teeth are arc-shaped, the outer teeth are curved-shaped, and both end sections of the curved shape are arc-shaped. If a radius of the arc shape of the inner teeth is set as ro, a radius of the arc shape of each of the corner sections is set as ri, a diameter of a pitch circle of the inner teeth is set as dp, and the number of the inner teeth is set as z, the inner gear and the outer gear each has a shape that satisfies a relationship established by following equations: 1.6>ro/(dp/z)>1.0; and ro/(dp/z)>ri/(dp/z)≧0.13. Each of the inner teeth is provided so that an intersecting point between one of arcs that follow the first arc shapes of the adjacent inner teeth and the pitch circle of the inner teeth and in proximity to the other arc is located outside of the other arc. | 06-13-2013 |
20130183182 | STATOR OF A GEROTOR DEVICE AND A METHOD FOR MANUFACTURING ROLLER POCKETS IN A STATOR OF A GEROTOR DEVICE - A method for manufacturing roller pockets in a stator of a gerotor device generally includes providing a stator having a cavity including a generally cylindrical section defining a central axis and a plurality of roller pockets angularly spaced around a periphery of the cylindrical section. Each roller pocket is configured to receive a respective roller, which acts as an internal tooth of the gerotor device. Each roller pocket defines a generally cylindrical roller pocket bearing surface. The method further includes grinding each roller pocket bearing surface of each roller pocket with a grinding wheel rotating about a rotational axis perpendicular to the central axis. A stator for a gerotor device is also described. | 07-18-2013 |
20130315770 | PUMP ASSEMBLY FOR A VEHICLE - A pump assembly for a vehicle is disclosed. The pump assembly includes a housing defining a cavity extending along a central axis to present a wall disposed radially relative to the central axis and a base transverse to the central axis. The pump assembly also includes a first gear disposed in the cavity. The first gear has a first side and a second side each extending along the central axis. The first side faces the wall and the second side opposes the first side. The first side of the first gear is complementary to the wall. The wall defines a recess adjacent to the cavity and spaced from the base. The recess is in fluid communication with the cavity for providing lubrication between the wall and the first side of the first gear. | 11-28-2013 |
20130330222 | METHOD FOR PRODUCING THE TOOTH SHAPE OF THE INNER AND OUTER RING OF AN ANNULAR GEAR MACHINE AND TOOTHED RING PRODUCED BY MEANS OF SAID METHOD - In producing tooth shapes of two toothed rings of an annular gear machine, a starting geometry of a first toothed ring, at least one quality criterion of the annular gear machine, and a desired eccentricity between rotational axes of the two toothed rings are defined. A motion is performed with the starting geometry that performs a rotational motion about its rotational axis and a revolving motion about the rotational axis of the second toothed ring. The rotational and revolving motions are coupled so the rotational angle of the eccentricity equals the product of the rotational angle and tooth count of the first toothed ring. A tooth shape contour of the second toothed ring is generated by recording the path described by the envelope of the starting geometry. If the defined quality criterion is not met, the previously used starting geometry and/or the defined eccentricity is changed and steps are repeated. | 12-12-2013 |
20140023543 | COMBINED MOTOR AND BRAKE WITH ROTATING BRAKE-RELEASE PISTON - The present disclosure relates to a combined hydraulic motor and brake including a hydraulic motor having a hydraulic motor housing, a drive shaft assembly that is driven by the hydraulic motor, a stationary housing that is fixed relative to the hydraulic motor housing, and a rotatable housing that is rotatably driven by the drive shaft assembly. The combined hydraulic motor and brake also includes a brake for resisting relative rotation between the rotatable housing and the stationary housing, and a piston that is hydraulically actuated to release the brake. The piston is carried with the rotatable housing such that the piston, the rotatable housing and at least a portion of the drive shaft assembly are configured to rotate as a unit. | 01-23-2014 |
20140037487 | GEROTOR DEVICE ROLLER POCKET GEOMETRY - A gerotor device includes a rotor having outwardly extending teeth and a stator having inwardly extending teeth. The inwardly extending teeth are formed by rollers each of which is received in a respective roller pocket in the stator. Each roller pocket has a maximum pocket width measured perpendicular to a pocket centerline. Each roller pocket defines a roller bearing surface having a first side that follows a first radius and a second side on an opposite side of the centerline that follows a second radius. Each radius is greater than ½ the maximum pocket width. Each roller pocket has an edge pocket width between a first pocket edge where the pocket transitions to a generally cylindrical section in the stator and a second pocket edge on an opposite side of the centerline. The edge pocket width is less than the maximum pocket width. | 02-06-2014 |
20140105775 | GEROTOR MOTOR BALANCING PLATE STRUCTURE - A gerotor device includes a valving plate, a balancing plate structure, and a rotor positioned between the valving plate and the balancing plate structure. High pressure fluid flowing from the valving plate toward the rotor pushes the rotor toward the balancing plate structure. The balancing plate structure includes a balancing plate and a second plate. A cavity is defined between the balancing plate and the second plate. The balancing plate includes a fluid passage having a check valve and fluid passes through the fluid passage for pressuring the cavity. The balancing plate includes first and second relief holes extending through the balancing plate connected with the cavity. | 04-17-2014 |
20140154125 | GEAR RING PUMP - The invention relates to a gear ring pump, in particular for use in small pump assemblies which are preferably driven by an electric motor, which are produced as pump kits, and which are used in vehicle and engine construction. The aim of the invention is to develop a gear ring pump which can be used in pump assemblies with a small housing outer diameter, the pump control times of which can be easily modified with respect to the production process in accordance with the respective customer request, and which always ensures an optimal axial gap even when using very inexpensive assemblies, such as pump housings made of aluminum and impellers made of steel, even under the extreme use conditions of an oil pump in conjunction with an internal combustion engine. The gear ring pump according to the invention is characterized in particular in that the pump bearing ( | 06-05-2014 |
20140178233 | OIL PUMP ROTOR - Provided is an oil pump rotor capable of improving a volume efficiency and a quietness. When a diameter of a base circle bi of an inner rotor is Φ bi; a diameter of a first outer rolling circle Di is Φ Di; a diameter of a first inner rolling circle di is Φ di; a diameter of a base circle bo of an outer rotor is Φ bo; a diameter of a second outer rolling circle Do is Φ Do; a diameter of a second inner rolling circle do is Φ do; and an eccentricity amount between the inner rotor and the outer rotor is e, Φ bi=n·(Φ Di+Φ di) and Φ bo=(n+1)·(Φ Do+Φ do) hold; either Φ Di+Φ di=2e or Φ Do+Φ do=2e holds; and Φ Do>Φ Di and Φ di>Φ do hold. When a clearance between the inner rotor and the outer rotor is t, 0.3≦((Φ Do+Φ do)−(Φ Di+Φ di))·(n+1)/t≦0.6 holds, provided that Φ Di+Φ di=2e; or 0.3≦((Φ Do+Φ do)−(Φ Di+Φ di))·n/t≦0.6 holds, provided that Φ Do+Φ do=2e. | 06-26-2014 |
20140199198 | 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 ( | 07-17-2014 |
20140219852 | HYDRAULIC DEVICE - A hydraulic device ( | 08-07-2014 |
20140271308 | GEROTOR ROTARY STIRLING CYCLE ENGINE - Stirling cycle engines with hot and cold gerotor sets separated by an insulation barrier. The barrier has regenerative gas passages to allow gasses to flow therethrough thus connecting displacing chambers of the hot and cold gerotor sets. Each gerotor set has a rotor within a stator and displacing chambers created in an offset space therebetween. The stators may rotate about the rotors, or vice-versa. Either the rotor of the cold gerotor set has an axis of rotation offset with respect to the rotor of the hot gerotor set or the stator of the cold gerotor set has an axis of rotation offset with respect to the stator of the hot gerotor set, and the non-offset rotors or stators rotate about a common axis and are rotationally connected and create an angular phase offset between connected hot and cold chambers. The gerotor apparatuses may be utilized for a Stirling cycle engine for generating electricity, for example. | 09-18-2014 |
20140271309 | TORQUE-GENERATING STEERING DEVICE - A torque generator is disclosed. The torque generator includes a valve arrangement including a spool valve and a valve sleeve. A torsion bar biases the valve arrangement toward a neutral position. | 09-18-2014 |
20140286809 | PUMP - A pump includes a second housing member in which a suction-side groove and a discharge-side groove are formed at a predetermined interval in a circumferential direction of a bottom of a pump chamber so as to be recessed in the bottom of the pump chamber. Fitting portions that are fitted to bosses are formed on an outer surface of the second housing member. A protruding portion, which overlaps with the bosses in a thickness direction, is formed so as to protrude from a surface of the housing on which the fitting portions are formed. A relief valve is provided in the protruding portion, and the relief valve discharges fluid from the discharge-side groove when pressure in the discharge-side groove is equal to or higher than predetermined pressure. | 09-25-2014 |
20140294644 | PUMP - A pump includes: a housing in which a pump chamber that is a columnar space is formed, the pump chamber being provided with a suction-side groove and a discharge-side groove that are formed as recesses; an outer rotor rotatably disposed in the pump chamber and having internal teeth on an inner periphery of the outer rotor; and an inner rotor disposed radially inward of the internal teeth of the outer rotor, and having external teeth formed on an outer periphery of the inner rotor and meshed with the internal teeth of the outer rotor. A portion of an inner edge of the discharge-side groove is located radially inward of a locus of tooth tips of the internal teeth of the outer rotor, the portion being located in a second half region of the discharge-side groove in a rotational direction of the inner rotor and the outer rotor. | 10-02-2014 |
20140308147 | 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 outer gerotor chamber, and a synchronizing apparatus operable to control the rotation of the inner gerotor relative to the outer gerotor. The inner gerotor includes one or more entrance passages operable to communicate a lubricant into the outer gerotor chamber. | 10-16-2014 |
20140334958 | Continuously Variable Transmission Provided with a Gerotor Pump - A continuously variable transmission (CVT) provided with an integrated gerotor pump that also acts as a rotation blocker is described herein. In one illustrated embodiment, the gerotor pump is used to pump lubrication and cooling fluid through a radiator and into the hollow shaft of the CVT. | 11-13-2014 |
20140369879 | HOLLOW GEROTOR - Provided is a hollow rotor and method for making a hollow rotor for a gerotor system, the gerotor system including inner and outer rotors having interengaging lobed profiles. At least one of the inner or outer rotors comprises the hollow rotor, the hollow rotor including radially inner and outer walls radially spaced-apart in relation to a rotational axis of the rotor and walls extending between the radially inner and outer walls for closing axial ends of the hollow rotor. The radially inner and outer walls define therebetween a cavity, thus providing for a hollow or empty interior of the hollow rotor. At least one of the radially inner or outer walls forms a plurality of lobes circumferentially spaced-apart around the cavity. | 12-18-2014 |
20150030488 | GEAR PUMP - In a gear pump, an outer rotor and an inner rotor are disposed in a rotor installation chamber defined by a pump body and a pump cover. A suction port groove and a discharge port groove are formed in at least one of the pump body and the pump cover. A narrowing portion is formed at a portion of a radially outer side wall portion of the suction port groove, the portion being close to a terminal end wall portion of the suction port groove. The narrowing portion narrows the groove width in the radial direction. A pressurizing region that pressurizes oil in the gear chamber is formed between the narrowing portion and the terminal end wall portion. | 01-29-2015 |
20150037193 | OIL PUMP - An oil pump has a pump body, a pump cover, an outer rotor, and an inner rotor. The pump body includes a rotor chamber, a first inlet port, a first outlet port, a first inlet passage, a first outlet passage, a relief valve, a relief chamber formed on a discharge side of the relief valve, and a first oil return passage formed from the relief chamber to the first inlet passage. The pump cover has a second oil return passage. The first oil return passage is formed in an inner circumferential support wall of the rotor chamber as a groove-like recess and opens along an outer circumferential surface of the outer rotor. A support protrusion is formed near a portion where the second oil return passage is formed to support a front surface, in a radial direction, of the outer rotor. | 02-05-2015 |
20150050176 | Cycloidal Pinwheel Pair with Uniform Contact and One-tooth Difference - Disclosed is a cycloidal pinwheel pair with uniform contact and one-tooth difference, comprising a stator and a rotor. Each gear tooth profile of the rotor has a modified recess provided symmetrically on both sides; the starting point (A) of the modified recess on one side of the gear tooth profile is located between a first point and a second point determined by locations of two limit positions, the end point (B) of the modified recess on the same side of the gear tooth profile is located between a third point and a fourth point determined by locations of two limit positions. By adopting the present disclosure, the internal leakage formed between high and low pressure chambers is effectively avoided, thereby significantly improving the volume efficiency and mechanical efficiency. Meanwhile, the present disclosure is extremely simple in structure and can be molded by one-time grinding with better manufacturability. | 02-19-2015 |
20150064038 | INTERNAL GEAR PUMP - An internal gear pump includes a housing having a pump chamber in which an inner rotor and an outer rotor are arranged. A suction port in communication with a suction path and a discharge port in communication with a discharge path are formed at the housing. The pump chamber includes an inner wall having a suction region at a suction port-side and a discharge region at a discharge port-side. The suction region includes a first suction region extending towards the suction path from a pressing point, where the outer rotor is pressed when the internal gear pump is in operation, and a second suction region between the first suction region and the discharge region. A groove that enlarges a clearance between the outer rotor and the inner wall is formed in the first suction region, but the groove is not formed in the second suction region. | 03-05-2015 |
20150132170 | PUMP UNIT - A pump unit includes a housing which has an outwardly open recess, in which a pump is arranged. The recess is closed by a cover. The pump unit also has a pressure relief valve which is arranged in an opening of the housing which opens to the outside. The pressure relief valve has a valve seat which is formed in the opening and against which a seat valve member is loaded in the closing direction by way of a prestressed compression spring. The seat valve member can be loaded in the opening direction by the outlet pressure of the pump. | 05-14-2015 |
20150315913 | ROTARY MACHINE - A rotary fluid machine has an inner rotor and an outer shell held by a stationary support structure, arranged so that sealing points on the inside of the shell interact in a sealing arrangement with the outer surface of the rotor to define working chambers, such that in use the relative motion of the rotor to the shell causes fluid to be moved through ducts in the rotor and rotor shaft, between the working chambers and a point where the rotor shaft interacts with the support structure. | 11-05-2015 |
20160160982 | HYDRAULIC CONTROL UNIT HAVING INTERFACE PLATE DISPOSED BETWEEN HOUSING AND PUMP - A hydraulic control unit that delivers hydraulic fluid to a limited slip differential constructed in accordance to the present disclosure can include a hydraulic control unit housing, a motor, a gerotor gear assembly and an interface plate. The hydraulic control unit housing can have a housing mounting surface. The motor can include an output shaft and a motor mounting plate that has a motor mounting surface. The gerotor gear assembly can include an inner and outer gerotor gear. The outer gerotor gear can be formed of a first material having a first coefficient of expansion. The interface plate can be mounted between the housing mounting surface and the motor mounting surface. The interface plate can receive the outer gerotor gear in an interference fit. The interface plate is formed of a second material having a second coefficient of expansion that is substantially equivalent to the first coefficient of expansion. | 06-09-2016 |