Class / Patent application number | Description | Number of patent applications / Date published |
418160000 | MOVING CYLINDER | 65 |
20140030130 | SLIDING VANE PUMP - Disclosed herein is a sliding vane pump for providing positive displacement of a fluid such as water. The pump comprises a pump assembly having a housing with a fluid inlet and a fluid outlet formed therein, a lining member received in the housing and defining a substantially cylindrical inner surface and a rotor arranged inside the lining member to rotate about a rotational axis. The rotor defines a substantially cylindrical outer surface such that the inner surface of the lining member and the outer surface of the rotor define a working space therebetween, the working space having a radial cross-sectional area which varies about the rotational axis. The pump assembly also comprises a plurality of vanes received in substantially radial slots formed about the outer surface of the rotor. Each of the vanes is arranged to slide in the radial direction with respect to the rotor such that an outer edge of the vane contacts the inner surface of the lining member, thereby dividing the working space into working chambers. In use, rotation of the rotor draws the fluid from the fluid inlet into the working chambers and ejects the fluid from the working chambers into the fluid outlet. The vanes are formed of a carbon graphite or ceramic material and the rotor is formed of a ceramic material, which provides reduced thermal expansion compared to convention materials such as stainless steels. A base portion of each of the slots of the rotor is enlarged and has a rounded cross-sectional shape. The pump assembly further comprises a strainer assembly received into an opening in the housing and extending across the fluid inlet for filtering particulate matter from the fluid. The strainer assembly comprises a thermal sensor for sensing a temperature of fluid passing through the fluid inlet. | 01-30-2014 |
20140037488 | Vane-type Compressors and Expanders with Minimal Internal Energy Losses - Current piston based air-conditioning system compressors only have isentropic efficiencies near 50%. Making internal leakage and friction negligible, via detailed design of the vane machine, would almost halve power consumption. In addition, by recovering expansion energy that is normally wasted via an expander, the system Coefficient of Performance COP can be improved up to an additional 30%. | 02-06-2014 |
418161000 | Rotating | 63 |
20080213117 | Pump Rotor - In pump rotors and used in an internal gear pump, which includes an inner pump rotor having outer gear teeth; an outer pump rotor having inner gear teeth that mesh with the outer gear teeth; and a casing having a pumping-in port through which a fluid is pumped in, and a pumping-out port through which the fluid is pumped out, and pumps in and pumps out the fluid by changing the cell volume formed between gear tooth surfaces of the rotors and so as to carry the fluid when the rotors and mesh with each other and rotate, the rotors are formed from a sintered material of Fe—Cu—C and have a density of not less than 6.6 g/cm | 09-04-2008 |
20090016919 | Gear pump - A gear pump ( | 01-15-2009 |
20100178190 | Accurate Powder Metal Component, Assembly and Method - The invention provides an accurate powder metal component having a body with opposed surfaces at least one of which has at least one projection of smaller cross-sectional area than the main portion of the body of the component. The distance from the free end of the projection to the opposite end of the component defines one dimension of the component that must be relatively accurate, in one embodiment to slide against and form a seal that inhibits liquid flow against another component of an assembly. In the manufacturing method, the powdered metal component is made by compaction to form the body including a projection at the end, is sintered and thereafter is reduced in the dimension between the end of the projection and the opposite end of the component by coining the free end of the projection so as to reduce the dimension to within a tolerance of the nominal specified dimension. | 07-15-2010 |
20110243780 | AXIAL PISTON MACHINE - The invention relates to an axial piston machine ( | 10-06-2011 |
20120177524 | ROTARY CYLINDER DEVICE - In the rotary type cylinder device, a first crank shaft is revolved around a shaft and a composite piston assembly is revolved around the first crank shaft in a state where first rotational mass balance relating to first and second piston units around second virtual crank shafts, second rotational mass balance relating to the composite piston assembly around the first crank shaft and third rotational mass balance relating to the first crank shaft and the composite piston assembly around the shaft are uniformly produced by only first and second balance weights which are attached to end parts of the first crank shaft. Therefore, first and second piston units, which are attached to the second cylindrical sections, are linearly reciprocally moved in radial directions of a circular orbit of second virtual crank shafts, which has radius of 2 r, with relatively revolving around the shaft. | 07-12-2012 |
20120237383 | HYDRAULIC MOTOR OR PUMP WITH TANGENTIAL PISTONS WITH ANNULAR OR SECTIONAL SHAPE ON ORDINARY OR PLANETARY GEAR FOR HIGH TORQUE, AND POWER PERFORMANCE AND HYDRAULIC AND MECHANICAL EFFICIENCY - A hydraulic motor or pump includes eccentric shafts arranged in a planet position with respect to the output shaft, subject to the action of two propelling members for each shaft, which are arranged in a tangential position with respect to the output shaft and act on intermediate planetary fixed parts alternated with the shafts. The propelling members receive flow of pressurized fluid regulated by rotatory openings, which connect the propelling members to the pressure circuit or to the discharge one. The motor can be connected, through the eccentric shafts, to ordinary or planetary gearings. The gearing presents an actual piston displacement and one or two different equivalent piston displacements. The shape of the motor is annular, or sectoral, with a circular open space available inside the motor for different applications. The number of the planet shafts has no limits, since they independently transmit the torque-allowing annular shapes of any size. | 09-20-2012 |
20150050177 | HYDRAULIC MACHINE, IN PARTICULAR HYDRAULIC PRESSURE EXCHANGER - A hydraulic machine ( | 02-19-2015 |
418164000 | Rotary internal reacting member | 55 |
20090238708 | ROTARY PUMP - Disclosed herein is a rotary pump in which one or more rotors including rotary cylinders and rotary pistons rotate upon inside a housing having a suction hole and a discharge hole to compress a pump fluid. More particularly, the two rotary pistons are arrange to revolve about a rotating shaft in a state wherein the center of mass of the two rotary pistons coincide with that of the rotating shaft, thereby achieving not only a reduction in the generation of vibrations or noise, but also a variation in the flow of rate of fluid. The rotary pump may have a cover, which is opened or closed in accordance with a pressure, to prevent the generation of backflow and pulsations in accordance with the rotation of the rotary pump when the pressure of the discharge hole differs from that of the suction hole. | 09-24-2009 |
20120171067 | HERMETIC COMPRESSOR AND MANUFACTURING METHOD THEREOF - A hermetic compressor is provided, comprising: a cylindrical shell; a stator fixed to inner surface of the shell; a rotor rotatably installed with respect to the stator; a compression unit combined with the rotor to be rotated together with the rotor; a stationary shaft including an eccentric portion around which the compression unit is supported stationary with respect to a longitudinal direction thereof; an accumulator fixed to inside of the shell in such a manner sealing the upper end of the shell and fixedly supporting one end of the stationary shaft above the stator; a lower frame fixed to inside of the shell and fixedly supporting the other end of the stationary shaft; an upper cap to seal the upper end of the accumulator; and a lower cap to seal the lower end of the shell. | 07-05-2012 |
20130089452 | GEROTOR PUMP - Provided is a gerotor pump including an inner rotor connected to a driving axis of a motor to transfer rotation force, an outer rotor formed at an outer side of the inner rotor, and a casing receiving the inner and outer rotors therein and provided with an inlet and an outlet, the inner and outer rotors forming several closed chambers while eccentrically rotating, having a predetermined clearance therebetween, to transfer a fluid, wherein a pressure chamber is formed in the casing in a direction in which force acts on the outer rotor by pressure of the fluid to offset the force, such that frictional force between the outer rotor and the casing decreases, thereby making it possible to improve performance and efficiency of the pump. | 04-11-2013 |
20130251580 | PENDULUM-SLIDE PUMP - A pendulum-slide pump may include a rotatingly mounted inner rotor connected via at least one pendulum with an outer rotor. The inner rotor may define a plurality of radial grooves configured to receive the pendulum. The grooves may have two groove walls that continues via a rounded region into a shared groove base. The rounded region may have variable groove radii and continue with at least a reduced curvature jump into the groove base or the groove walls. The groove radii may be greated in the translation to the groove walls and to the groove base than therbetween. | 09-26-2013 |
20140356212 | TRANSMISSION FLUID PUMP SPEED CONTROL SYSTEMS AND METHODS - A transmission fluid pump control system of a vehicle includes a target speed module and a speed control module. The target speed module determines a target speed of an electric transmission fluid pump based on a target output flowrate of the electric transmission fluid pump, a predetermined maximum allowable amount of leakage of transmission fluid pumps, and an efficiency of the electric transmission fluid pump. The speed control module applies power to the electric transmission fluid pump based on the target speed. | 12-04-2014 |
20190145406 | SCAVENGE/CHARGE PUMP DRIVE GEAR FOR INTEGRATED DRIVE GENERATOR | 05-16-2019 |
418166000 | Intermeshing peripheral surfaces | 46 |
20090010791 | Internal gear pump - An internal gear pump which has a crescent disposed between an outer rotor and an inner rotor having a trochoidal tooth profile, and which reduces vibrations caused by pulsations generated when the fluid is discharged. The internal gear pump has an outer rotor having internal teeth formed therein, an inner rotor disposed on the inner peripheral side of the outer rotor and having formed therein external teeth that mesh with the internal teeth, and a crescent disposed in a clearance between the outer rotor and the inner rotor. Pitch spacings of the external teeth of the inner rotor are formed as non-equal spacings, and pitch spacings of the internal teeth of the outer rotor correspond to the pitch spacings of the external teeth of the inner rotor. | 01-08-2009 |
20090060769 | Pumping Apparatus - A pumping apparatus includes a pump housing, a pumping member which is rotatable in the housing to pump fluid, the pumping member being provided on a support which is in use, driven, the housing including in communication with an inlet, a lower pressure region, and in communication with an outlet, a higher pressure region, there being a passage for fluid from the higher pressure region to the lower pressure region through the support when the fluid pressure in the higher pressure region exceeds a threshold value. | 03-05-2009 |
20090185939 | Trochoid Pump - A trochoid pump | 07-23-2009 |
20090202377 | Gerotor and Method of Assembling the Same - A gerotor and methods for assembling the gerotor are disclosed. The gerotor includes a pump housing having a channel and a rotor positioning cavity, a pump shaft, an inner rotor, and an outer rotor. The pump shaft has central pump shaft axis and the inner rotor has a central inner rotor axis. The methods include: inserting the pump shaft through the channel; sliding the inner rotor onto the pump shaft at an oblique angle such that the central inner rotor axis is at least partially angularly offset from the central pump shaft axis; rotating the inner rotor to substantially align the central inner rotor axis and the central pump shaft axis and to engage the pump shaft with the inner rotor; and positioning the outer rotor around the inner rotor to maintain substantial alignment of the inner rotor with the pump housing and/or the pump shaft. | 08-13-2009 |
20100098571 | Pump Apparatus and Methods for Using Same - A pump apparatus for transporting at least one fluid, comprising a shaft, wherein the shaft has a longitudinal axis; a motor, wherein the motor is adapted to rotate the shaft about the longitudinal axis; and, a plurality of gerotors, wherein the gerotors are attached to the shaft along the longitudinal axis and wherein the shaft rotation actuates the plurality of gerotors rotation, causing pumping of the at least one fluid. | 04-22-2010 |
20100239449 | Gear Pump Having Optimal Axial Play - The invention relates to a pump, in particular an oil pump, for internal combustion engines, comprising a pump case, with the pump case comprising a pump lid and a pump flange, with at least one toothed wheelset being arranged between the pump lid and the pump flange and the pump lid and the pump flange being connected via at least one distance element. | 09-23-2010 |
20110014078 | OIL PUMP - An oil pump includes: an inner rotor rotatable with a drive shaft in a unified manner on a drive-rotation axis; an outer rotor which has inner teeth configured to engage with outer teeth of the inner rotor and is rotatable about a driven axis eccentric to the drive-rotation axis; and an adjustment ring for rotatably supporting the outer rotor. A guide means which allows the adjustment ring to rotate about the driven axis, while allowing the driven axis to revolve about the drive-rotation axis, is formed of: first and second arm portions provided on the adjustment ring; and first and second guide faces with which the first and second arm portions are brought into slidable contact. | 01-20-2011 |
20110038746 | VARIABLE-VOLUME INTERNAL GEAR PUMP - The invention relates to a variable-volume internal gear pump, in particular for use as an engine lubrication pump for automobiles. The internal gear pump comprises a housing ( | 02-17-2011 |
20110194968 | OIL PUMP - An oil pump having an inner rotor with of external teeth; an outer rotor that is eccentrically provided and has internal teeth that mesh with the inner rotor external teeth, and an oil pump body that accommodates the outer and inner rotors. By rotationally driving the inner rotor to increase and decrease a space between the internal and the external teeth, an intake stroke suctions hydraulic oil from the oil pump body and a discharge stroke discharges the suctioned hydraulic oil to a discharge port formed in the oil pump body. Between the intake and discharge strokes, a confinement stroke cuts off the suctioned hydraulic oil and confines the suctioned hydraulic oil in the space, and a compression stroke reduces the space and compresses the confined hydraulic oil. Further, an interval is set between a finish end portion of the intake port of the oil pump body and a start end portion of the discharge port such that a rotation angle of the inner rotor during the compression stroke is 21 to 27 degrees. | 08-11-2011 |
20110229361 | ROTARY PUMP - A housing includes a pump chamber, which rotatably receives an inner rotor and an outer rotor that define a pressure chamber therebetween. An inlet port of the housing is communicated with the pressure chamber to supply fluid into the pressure chamber. An outlet port of the housing is communicated with the pressure chamber to discharge the fluid from the pressure chamber. An axial size of an axial clearance, which is formed between an axial end surface of the pump chamber and an axial end surface of the inner rotor, differs from an axial size of an axial clearance, which is formed between the axial end surface of the pump chamber and an axial end surface of the outer rotor. | 09-22-2011 |
20120003112 | UNIAXIAL ECCENTRIC SCREW PUMP - Provided is a uniaxial eccentric screw pump which can prevent the life of a bearing sliding portion from decreasing due to a thrust load applied from a high pressure side to a low pressure side. An external thread-like motor directly coupled with a driving shaft is rotated and eccentrically moved with respect to the axis of a stator to deliver a fluid from an intake side to a discharge side. The pump is provided at an end of the discharge side of the motor and extends toward the discharge side in the axial direction of the stator. The uniaxial eccentric screw pump includes an annular small-diameter portion and a seal member. The seal member | 01-05-2012 |
20120082579 | INTERNAL-GEAR TYPE FLUID DEVICE - In an internal-gear type fluid device, guide teeth are formed by inner teeth at an outer rotor, and vane portions extending in the width direction are formed at tooth tip portions of the guide teeth. Further, guide teeth are formed by outer teeth at the inner rotor, and vane portions extending in the width direction are formed at tooth tip portions of the guide teeth. Since the vane portions are thus formed at the outer rotor and the inner rotor, the confinement timing when oil confinement is completed can be synchronized with the release timing when oil release is started, by adjusting, for example, the thickness of the vane portions without changing the profile of the guide teeth. | 04-05-2012 |
20120087821 | Pump Assembly, In Particular for Helicopter Lubrication - A pump assembly, in particular for lubrication in helicopters, has a casing, the lateral wall of which defines an intake port and a delivery port; and the casing houses two rotary pumps powered by a drive shaft via a motion-splitting transmission. | 04-12-2012 |
20120128521 | OIL PUMP ARRANGEMENT IN A TRANSMISSION - An arrangement of an oil pump ( | 05-24-2012 |
20120177525 | PUMP ROTOR AND INTERNAL GEAR PUMP USING THE SAME - An object is to meet the demands for increasing the number of teeth of a rotor in an internal gear pump while maintaining a theoretical discharge amount by using an equivalent body configuration so as to enhance the pump performance relating to discharge pulsation due to the increased number of teeth. In a pump rotor | 07-12-2012 |
20120207637 | PERIPHERAL PUMP-TURBINE - A peripheral pump-turbine including two wheels meshed with one another, laterally incorporating two or more blades fitting in matching recesses intercalated between said blades, being housed in a casing provided with fluid intake and discharge openings, where the wheels can incorporate teeth arranged between the blades and the recesses to allow the meshing thereof, and where the wheels can mesh by means of pinions integrally coupled to the shafts thereof in the outer portion of the casing. | 08-16-2012 |
20120213657 | FLUID PUMP MECHANICAL SEAL - A fluid pump having a pump motor, pump housing, and pump seal enclosure disposed between the pump motor and the pump housing. A pump drive shaft is rotatably driven by the pump motor and extends through the pump seal enclosure and a drive shafting opening into a pumping chamber of the pump housing. A drive shaft seal assembly is disposed within the pump seal enclosure and includes a spring seat, rotary ring, stationary ring, and compressible spring each disposed coaxially with the drive shaft. The spring seat includes a first alignment mechanism and the rotary ring includes a second alignment mechanism for engaging the first alignment mechanism. The stationary ring is fastened to the pump seal enclosure adjacent the drive shaft opening, and the compressible spring biases the rotary ring against the stationary ring. | 08-23-2012 |
20120224991 | POSITIVE DISPLACEMENT FLUID PUMP - A fluid pump includes a motor, an inner gear rotor and an outer gear rotor. The inner gear rotor is driven for rotation about an axis by the motor and has a plurality of outwardly extending teeth. The outer gear rotor has a plurality of inwardly extending teeth that are engaged by the teeth of the inner gear rotor so that the outer gear rotor is driven for rotation about a second axis when the inner gear rotor rotates. At least one of the inner gear rotor and the outer gear rotor is formed from a plastic material. | 09-06-2012 |
20120244027 | PUMP DEVICE - The invention has: a housing; a pump section formed of a drive gear unit and a driven gear unit; a main flow channel through which oil pressure is applied to the driven gear unit in a discharge volume reduction direction; a first branching flow channel through which oil pressure that assists oil pressure from the main flow channel is applied; a second branching flow channel through which oil pressure is applied to the driven gear unit in a discharge increase direction; a first flow channel control section; a second flow channel control section; and a spring that elastically urges the driven gear unit in a discharge increase direction. The first flow channel control section and the second flow channel control section can perform switching control in accordance with each increase or decrease of engine revolutions and in pressure. | 09-27-2012 |
20120244028 | Internal Gear Pump for a Hydraulic Vehicle Braking System - The disclosure relates to an internal gear pump for a slip-regulated hydraulic vehicle braking system, comprising one pressure piece on either side of the gear wheels of said pump. According to the disclosure, a disk consisting of wear-resistant material is arranged between the pressure piece and the gear pump. The pressure pieces can be manufactured from plastic to reduce costs. | 09-27-2012 |
20120251371 | GEAR PUMP - In a gear pump in which a driving rotor that is driven by a driving source meshes with a driven rotor that is driven by the driving rotor for rotation to pump a hydraulic oil, only one of the driving rotor and the driven rotor is given the steam treatment while the other remains untreated. | 10-04-2012 |
20120308423 | OIL PUMP - An oil pump includes: a rotor chamber; an outer rotor; and an inner rotor. A partition surface between a starting end side of the intake port and a terminal end side of the discharge port is set as a first seal land. An intake groove portion that projects from the starting end side of the intake port toward the terminal end side of the discharge port and a discharge groove portion that projects from the terminal end side of the discharge port toward the starting end side of the intake port are formed in positions which are located on the first seal land. The intake groove portion and the discharge groove portion are provided in intermediate tooth height direction positions of a meshing location between the inner rotor and the outer rotor. | 12-06-2012 |
20120315177 | ENGINE OIL PUMP - An engine oil pump, may include a plunge pool formed in a pump case and preventing a rapid change in pressure of oil when the oil may be discharged through an oil discharge portion that may be a cross-section expansion section by generating vortex flux when oil, which may be pumped into an oil pocket by rotation of an inner rotor and an outer rotor, temporarily collects before being discharged after passing a cross-sectional reduction section, and reducing the pressure by consuming the energy of the oil increasing in pressure by the vortex flux. | 12-13-2012 |
20120328464 | OIL PUMP - An oil pump is increased to inhibit noise generation and durability is also improved. The oil pump includes a pump body, an inner rotor having outer teeth, and an outer rotor having inner teeth. A maximum partition portion is formed between a trailing end side of an intake port and a leading end side of a discharge port in a rotor chamber of the pump body. Among cells constituted by the outer teeth of the inner rotor and the inner teeth of the outer rotor, a central cell positioned in the location of the maximum partition portion and adjacent cells positioned before and after the central cell in the direction of rotation are sealed by mutual contact of the outer teeth and the inner teeth. The outer teeth and the inner teeth constituting cells other than the central cell and adjacent cells are not in contact with each other. | 12-27-2012 |
20130034462 | Fluid Energy Transfer Device - A rotary chambered fluid energy-transfer device includes a housing with a central portion having a bore formed therein and an end plate forming an arcuate inlet passage, with a radial height and a circumferential extent. The device also includes an outer rotor rotatable in the central portion bore with a female gear profile formed in a radial portion defining a plurality of roots and an inner rotor with a male gear profile defining a plurality of lobes in operative engagement with the outer rotor. A minimum radial distance between an outer rotor root and a corresponding inner rotor lobe define a duct end face proximate the end plate, wherein the duct end face has a radial height substantially equivalent to the inlet passage radial height at a leading edge of the inlet passage. | 02-07-2013 |
20130045125 | FLUID ENERGY TRANSFER DEVICE - A trochoidal gear pump or engine uses a coaxial hub with an outer and/or inner rotor and an associated rolling element bearing assembly that uses pre-loaded bearings to precisely set the rotational axis and/or the axial position of the rotor with which it is associated. This allows the fixed-gap clearance between the rotor surfaces and the housing or other rotor surfaces to be set at a distance that minimizes operating fluid shear forces and/or by-pass leakage and eliminates gear tooth wear thus preserving effective chamber to chamber sealing. The device is useful in handling gaseous and two-phase fluids in expansion/contracting fluid engines/compressors and can incorporate an output shaft for a integrated condensate pump for use with Rankine cycles. A vent from the housing cavity to a lower pressure input or output port regulates built-up fluid pressure in the housing, thereby optimizing the efficiency of the device by controlling bypass leakage. | 02-21-2013 |
20130089453 | VEHICULAR INTERNAL GEAR TYPE OIL PUMP - An oil pump includes a first spill passage formed on a side surface ( | 04-11-2013 |
20130115124 | INTERNAL GEAR PUMP - An internal gear pump in which an inner rotor and an outer rotor are arranged in a rotor housing chamber. A deepest meshing section is located in the vicinity on a line connecting a center of the inner rotor and a center of the outer rotor. A center of the rotor housing chamber is offset, from a position in which the center and the center of the outer rotor coincide with each other, to the deepest meshing section side by an amount smaller than a tip clearance, which is a gap between the tooth tip of the inner rotor and the tooth tip of the outer rotor in the vicinity of a seal land between a terminal end side of an intake port and a start end side of a discharge port. | 05-09-2013 |
20130149181 | DISTRIBUTOR ASSEMBLY FOR TWO-SPEED GEROTOR DEVICE - A distributor assembly ( | 06-13-2013 |
20130323106 | ROTOR FOR OIL PUMP - 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 that is disposed on the outside of the inner rotor and has one tooth more than the inner rotor, wherein, in a tooth of the inner rotor, a tooth top and a tooth root of a drive-side half-tooth region extending from the tooth top to the tooth root and a tooth top and a tooth root of a non-drive-side half-tooth region extending from the tooth top to the tooth root are each configured by a different ellipse or a circle. A circumferential axis along a circumferential direction of the ellipse or circle configuring the tooth top is longer in the non-drive-side half-tooth region than in the drive-side half-tooth region. | 12-05-2013 |
20140255236 | INTERNAL GEAR PUMP - An internal gear pump for a hydraulic vehicle brake system includes a bearing formed for a pump shaft in a tubular form. The bearing is integrally formed with a housing of the internal gear pump. The bearing is configured to mount a pinion of the internal gear pump rotatably on the bearing. The internal gear pump also includes a catch configured to connect the pinion to the pump shaft for conjoint rotation. | 09-11-2014 |
20150010420 | OIL PUMP - An oil pump of the present invention includes a housing ( | 01-08-2015 |
20160069345 | Internal Gear Pump for a Hydraulic Vehicle Braking System - An internal gear pump for a slip-controlled hydraulic vehicle braking system has a pinion, an internal gear and a separating piece which is arranged between the pinion and the internal gear. The internal gear pump also has an inner part and an outer part, and separates a suction chamber from a pressure chamber. The separating piece is configured to protrude counter to a rotational direction of the internal gear pump beyond a sealing point of the inner part on the outer part such that the inner part and the outer part bear in front of the sealing point against at least one tooth tip of a tooth of the pinion and of the internal gear of the internal gear pump. As a result, tilting of the inner part and of the outer part away from the pinion and from the internal gear about the sealing point is avoided. | 03-10-2016 |
20160186753 | TROCHOID PUMP WITH AIR EJECTION PORT - An air ejection port for ejecting air-mixed oil is structured with a first air ejection port provided on the inner peripheral side from an inscribed circle of an outer rotor and a second air ejection port provided on the outer peripheral side from a circumscribed circle of the inner rotor, the air ejection port can have an enlarged port area as the total of area of the first air ejection port and area of the second air ejection port in a state without being in communication with either of a suction port and a discharge port, and a disadvantage that a pump chamber of a previous stroke and a pump chamber of a subsequent stroke communicate with each other through the air ejection port can be avoided. | 06-30-2016 |
418167000 | With intake or exhaust passage in internal member | 1 |
20120134865 | ROTARY MECHANISM - A rotary mechanism including a rotor assembly having a plurality of piston members distributed about its periphery, and a rotary member in peripheral engagement with the rotor assembly. The rotary member ( | 05-31-2012 |
418168000 | Cylinder periphery comprises alternate tooth and passage portions (e.g., cage type) | 1 |
20150078947 | DOWNHOLE MOTOR STATOR AND METHOD OF MANUFACTURE - A method for producing modular down hole, hydraulic motor components involving the formation of replaceable stator slugs to be collectively housed within a stator housing to form a stator assembly, including, in some embodiments, replaceable lobe components for the stator slugs for altering the interference with a selected rotor for such motor. | 03-19-2015 |
418170000 | With filler element (e.g., crescent) | 8 |
20090104064 | Method for manufacturing trochoid pump and trochoid pump obtained - The present invention enables the manufacture of a trochoid pump having a crescent which has been considered theoretically impossible, by employing an inner rotor of a trochoid pump. An inner rotor having a predetermined number N of teeth that is equal to or larger than 4 is formed in advance. In order to manufacture an outer rotor with a predetermined number (N plus a natural number equal to or larger than 2) of teeth, row circles of a diameter slightly smaller than that of a drawn circle are disposed so as to bring the row circles into contact with the tooth bottomland of the inner rotor tooth profile, the inner rotor tooth profile is rotated by half a tooth about the center of the inner rotor and the outer rotor tooth profile is also rotated by half a tooth of the predetermined number (N plus a natural number equal to or larger than 2) of teeth about a virtual center of the outer rotor including the row circles, an established center is determined from the virtual center or the like at the time at which the contact state is assumed, a reference circle is drawn that has a radius from the established center to the row circles and that has the total predetermined number (N plus a natural number equal to or larger than 2) of the equidistantly spaced row circles to form the row circles as outer rotor tooth tips, thereby manufacturing the outer rotor tooth profile. | 04-23-2009 |
20100233005 | INTERNAL GEAR PUMP FOR A BRAKE SYSTEM - The invention relates to an internal gear pump for a braking system, in the pump housing of which an inner toothed hollow wheel and a gearwheel engaging in the toothing of the hollow wheel are mounted to rotate about parallel axes. The toothing thereof defines a tapering roughly crescent-shaped pump chamber, in which a filling piece is arranged supported along the length thereof. The circumferential surfaces of the filling piece closely correspond to the head diameter of the inner toothing of the hollow wheel or the gearwheel toothing and contact in a sealing manner with several tooth crowns covered thereby. A radial supporting force acts over a longitudinal range of the filling piece for improved sealing of a circumferential surface of the filling piece against the tooth crowns supporting the circumferential surface. According to the invention, a loose fit is provided between the circumferential surfaces of the filling piece and the opposing tooth crowns of the hollow wheel and gearwheel and the play acting on the filling piece is partly eliminated by support forces acting in opposing radial directions which act on the filling piece at a distance from each other. | 09-16-2010 |
20100247363 | INTERNAL GEAR PUMP FOR A BRAKE SYSTEM - The invention relates to an internal gear pump for a brake system, in the pump housing of which an internally toothed ring gear and a pinion meshing with the toothing of the ring gear are pivotally supported about parallel axes. As a result the toothing thereof limits an approximately crescent-shaped tapering annular space, in which a filler piece supported toward the intake side of the pump is arranged. The circumferential sides of the filler piece are bent in accordance with the addendum circle of the ring gear toothing or of the pinion toothing. The sides rest against several tooth tips in a sealing manner under a spring force. According to the invention, one of the two circumferential sides of the filler piece is formed by a radially resilient circumferential wall, which is nestled against the tooth tips of the pinion or the ring gear due to the deflection based on the inherent spring force thereof. | 09-30-2010 |
20130330223 | INTERNAL GEAR PUMP - 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. The internal gear pump also includes an axial disk arranged on front faces of the ring gear and the pinion and includes a lubricant feed from the suction region between the axial disk and the ring gear and pinion. The lubricant feed includes a lubricant channel which passes through the axial disk. A wedge gap is delimited between the axial disk and the ring gear and pinion. The wedge gap communicates with the suction region and, when the ring gear and the pinion are driven in rotation, a lubricating film forms between the axial disk and the ring gear and pinion. | 12-12-2013 |
20140030131 | 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 manner in the peripheral direction and an outer part extending in a curved manner in the peripheral direction. The inner part and the outer part are interconnected in a hinged manner on the suction-sided ends. A leg spring is arranged between the inner and outer parts and is configured to separate the inner and outer parts and press against the tops of the teeth of the pinion and the tops of the teeth of the ring gear of the internal gear pump. | 01-30-2014 |
20140086778 | INTERNAL GEAR PUMP, ESPECIALLY FOR A VEHICLE HYDRAULIC BRAKE SYSTEM - An internal gear pump includes a separator arranged in a pump chamber of the internal gear pump. The separator divides the pump chamber into a delivery chamber and a suction chamber and is arranged so as to be radially moveable and capable of pivoting. The internal gear pump further includes a bearing ring in which a ring gear of the internal gear pump is rotatably supported such that it can pivot about a pin. A pressure prevailing in the pump chamber when the internal gear pump is in operation acts on the ring gear and the bearing ring with a torque, which acts inwardly from the pin in a circumferential direction to the suction chamber and presses tooth tips of teeth of the ring gear inwards against the separator and presses the separator inwards against tooth tips of teeth of the pinion. | 03-27-2014 |
20140119973 | INTERNAL GEAR PUMP - An internal gear pump is a return feed pump for a hydraulic vehicle braking system. The internal gear pump includes a filling part formed by two flexible sheet metal parts connected by an axial sealing element that is vulcanized in place and, in side view, is U-shaped. The axial sealing element is configured to improve the efficiency of the internal gear pump and allows large production tolerances. | 05-01-2014 |
20180023560 | TOLERANCE INDEPENDENT CRESCENT INTERNAL GEAR PUMP | 01-25-2018 |
418171000 | Inner member has five or more teeth | 2 |
20090175751 | ELECTRIC PUMP - According to an aspect of the present invention, an electric pump includes: a housing; an outer rotor; an inner rotor; a base member facing one side surface of the outer rotor and one side surface of the inner rotor; a side plate member, having a facing surface facing the other side surface of the outer rotor and the other side surface of the inner rotor and a non-facing surface opposed to the facing surface; a shaft; a suction port; a discharge port; a negative pressure applied region; a positive pressure applied region; and a relief valve, discharging the fluid from the positive pressure applied region to a non-facing surface side of the side plate member when a pressure applied at the positive pressure applied region exceeds a predetermined value. | 07-09-2009 |
20090185940 | Method for manufacturing trochoid pump and trochoid pump obtained - The present invention enables the manufacture of a trochoid pump having a crescent which has been considered theoretically impossible by employing an inner rotor of a trochoid pump. An inner rotor having a predetermined number N of teeth that is equal to or larger than 4 is formed in advance. In order to manufacture an outer rotor with a predetermined number (N plus a natural number equal to or larger than 2) of teeth, row circles that are identical to a drawn circle are disposed so as to bring the row circles into contact with the tooth bottomland of the inner rotor tooth profile, the inner rotor tooth profile is rotated by half a tooth about the center of the inner rotor and the outer rotor tooth profile is also rotated by half a tooth of the predetermined number (N plus a natural number equal to or larger than 2) of teeth about a virtual center of the outer rotor including the row circles, an established center is determined from the virtual center or the like at the time at which the contact state is assumed, a reference circle is drawn that has a radius from the established center to the row circles and that has the total predetermined number (N plus a natural number equal to or larger than 2) of the equidistantly spaced row circles to form the row circles as outer rotor tooth tips, thereby manufacturing the outer rotor tooth profile. | 07-23-2009 |
418172000 | With movable partition member | 3 |
418173000 | Partition radially slidable in internal member | 3 |
20100310400 | Rotary Compressor - A rotary compressor includes a casing ( | 12-09-2010 |
20100310401 | REVOLVING VANE COMPRESSOR AND METHOD FOR ITS MANUFACTURE - A revolving vane compressor comprising: a cylinder having a cylinder longitudinal axis of rotation, a rotor mounted within the cylinder and having a rotor longitudinal axis of rotation, the rotor longitudinal axis and the cylinder longitudinal axis being spaced from each other for relative movement between the rotor and the cylinder; a vane operatively engaged in a slot for causing the cylinder and the rotor to rotate together, the vane being mounted in the slot with a two degree-of-freedom motion relative to the slot for enabling the rotor and the cylinder to rotate with each other. | 12-09-2010 |
20110064598 | Vane pump - An oil supply groove | 03-17-2011 |
418175000 | Moving partition on stationary member | 1 |
20110286872 | Metering gear pump or segment, and metering gear pump assembly comprising a plurality of metering gear pumps or segments - A metering pump or segment, and a metering pump assembly comprising a plurality of the metering pumps or segments, are disclosed. The drive shaft assembly for driving the pump gears of each metering pump or segment is coaxially aligned with the longitudinal axis of the pump or segment, as is the fluid inlet supply path, whereby only three gears are required to comprise each metering pump or segment. The single drive shaft assembly is utilized to drive all of the metering pumps or segments comprising the metering pump assembly, and the different metering pumps or segments are fluidically connected together by means of a common fluid passageway. In addition, the different metering pumps or segments can be interchanged or exchanged so as to permit different metered fluid output volumes to be outputted at different predetermined locations. Also, different metering pumps or segments can be disposed or arranged such that their metered flow output volumes can effectively be added together so as to achieve additionally desired metered fluid output volumes which are different from that achieved from any single one metering pump or segment. | 11-24-2011 |