Pressure Fluid Radially Balances Working Or Rotating Abutment Member Patents (Class 418/71)
Counterbalancing fluid directed to intertooth spaces or spaces between adjacent vanes (Class 418/74)
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Patent number: 11353020Abstract: A rotary pump, including: a housing featuring a delivery space which includes an inlet for a fluid on a suction side of the rotary pump and an outlet for the fluid on a pressure side of the rotary pump; an inner rotor which is arranged in the delivery space; an outer rotor which is arranged in the delivery space and forms delivery cells with the inner rotor, wherein an outer circumferential wall of the outer rotor is mounted in a sliding manner on an inner circumferential wall of the delivery space, wherein the inner circumferential wall of the delivery space and/or the outer circumferential wall of the outer rotor comprises at least one pocket.Type: GrantFiled: March 4, 2019Date of Patent: June 7, 2022Assignee: Schwäbische Hüttenwerke Automotive GmbHInventors: Gerd Jäggle, Moritz Raatschen, Michael Ehringer
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Patent number: 9488172Abstract: 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.Type: GrantFiled: May 24, 2012Date of Patent: November 8, 2016Assignee: GM Global Technology Operations LLCInventor: Robert E. Rhein
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Patent number: 9481347Abstract: The disclosure relates to an internal gear pump for a slip-controlled hydraulic vehicle brake system. According to the disclosure a separating piece of the internal gear pump is formed having an inner part and an outer part, which engages around the end of the inner part with allowance for tolerance. In this way, the inner part and the outer part are movably connected to one another in a radial direction, and can be installed in the internal gear pump as a pre-mounted assembly.Type: GrantFiled: July 29, 2013Date of Patent: November 1, 2016Assignee: Robert Bosch GmbHInventors: Rene Schepp, Edgar Kurz, Norbert Alaze
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Patent number: 9358967Abstract: A rotary pump has a linear groove formed on an end surface of a second side plate of an outer rotor. Thereby, it becomes possible to generate a force for pushing back the outer rotor to a sealing member side, and thus it becomes possible to reduce load applied to the second side plate. As a result, contact resistance between the outer rotor and the second side plate becomes smaller, and smoother pumping operation becomes possible. Further, since the force for pushing back the outer rotor to the first sealing member side is generated in the linear groove, it is possible to reduce an amount of decrease in a contacting area with the outer rotor and the second side plate, thereby reducing an amount of wear of the outer rotor and the second side plate.Type: GrantFiled: October 24, 2013Date of Patent: June 7, 2016Assignees: DENSO CORPORATION, ADVICS CO., LTD., NIPPON SOKEN, INC.Inventors: Kazunori Uchiyama, Naoki Hakamada, Kazuhide Uchida, Yasuhiro Kawase, Takahiro Yamaguchi, Tomoaki Kawabata, Kunihito Ando, Tadayoshi Usami
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Patent number: 9334862Abstract: A pump housing of a gear pump and a stator of an electric motor are fastened to each other with bolts via a front insulator. Dowel pins are inserted in respective through-holes that are formed in the front insulator at equal intervals in a circumferential direction so as to be located next to insertion holes for the bolts. Respective end portions of each dowel pin are in contact with a bottom face of the pump housing and a pump-side surface of the stator core, and the pump housing and the front insulator are fixed to each other such that a slight gap is formed between the pump housing and the front insulator.Type: GrantFiled: September 7, 2012Date of Patent: May 10, 2016Assignee: JTEKT CORPORATIONInventor: Junichi Miyaki
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Patent number: 9039398Abstract: 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.Type: GrantFiled: November 24, 2011Date of Patent: May 26, 2015Assignee: Robert Bosch GmbHInventors: Rene Schepp, Kornelius Loew
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Patent number: 9028232Abstract: 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.Type: GrantFiled: January 31, 2011Date of Patent: May 12, 2015Assignee: Robert Bosch GmbHInventors: Rene Schepp, Norbert Alaze
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Patent number: 8834140Abstract: A media delivery assembly in which a defined compensating pressure is established at the backs of included axially adjustable rotors and a control valve is provided for establishing the compensating pressure at a predetermined value between a pressure on the pressure side and a pressure on the suction side.Type: GrantFiled: March 26, 2010Date of Patent: September 16, 2014Assignee: Cor Pumps + Compressors AGInventors: Felix Arnold, Dieter Amesoeder, Marian Kacmar, Oliver Laforsch
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Patent number: 7699592Abstract: A rotary piston machine includes a driving part driven by an electric motor, and a driven part that have mutually engaging end-face denticulation for delivering a medium, the driving part and the driven part being housed in a machine housing and connected to the machine housing via respective bottom bearings of the driving/driven parts, creating a unit.Type: GrantFiled: March 16, 2006Date of Patent: April 20, 2010Assignee: Cor Pumps + Compressors AGInventor: Felix Arnold
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Patent number: 7275921Abstract: A pump e.g. a screw pump, includes a main pumping element and a generally parallel auxiliary pumping element, and a pump housing, the main and auxiliary pumping elements interacting with each other and with an internal wall of an elongate pumping chamber of the housing as they relatively rotate to pump fluid from a first axial inlet end of the elongate chamber towards a second axial outlet end of the elongate chamber, and wherein the internal wall of the elongate pumping chamber includes at least one recess which extends along at least a substantial portion of the axial extent of the chamber between the inlet and outlet ends of the chamber, an adjacent pumping element being contactable with the chamber wall at discrete contact edges either side of the recess.Type: GrantFiled: May 6, 2004Date of Patent: October 2, 2007Assignee: Automotive Motion Technology Ltd.Inventor: Robert William Beaven
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Patent number: 6743005Abstract: A gerotor motor having an inner gerotor positioned within an outer gerotor, a housing radially surrounding the outer gerotor, a cover plate positioned adjacent the outer gerotor and pressure balance grooves extending between the outer gerotor/cover plate interface and a region of radial clearance between the outer gerotor and the housing. Three such balance grooves are disclosed. They include an inlet balance groove, an outlet balance groove and an axial balance groove. These grooves serve to balance axial and radial hydraulic pressure forces acting on the outer gerotor. The resulting net pressure force is substantially independent of both inlet and outlet pressure.Type: GrantFiled: December 26, 2002Date of Patent: June 1, 2004Assignee: Valeo Electrical Systems, Inc.Inventor: Richard Scott Leemhuis
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Patent number: 6568929Abstract: A trochoid pump composed of an inner gear and an outer gear is used as a fluid pump such as a fuel pump for an automotive vehicle. An inner imbalance load inherently developing in the pumping chambers is suppressed or canceled by an outer imbalance load generated by pressurizing fluid introduced into blade ditches formed on an outer periphery of the outer gear. Positions of a pressure-introducing port and a pressure-releasing port for the blade ditches are selected so that the outer imbalance load is imposed in a direction opposing the inner imbalance load. An amount of the outer imbalance load is made equal to an amount of the inner imbalance load to eliminate undesirable effects of the inner imbalance load.Type: GrantFiled: March 4, 2002Date of Patent: May 27, 2003Assignee: Denso CorporationInventor: Masatoshi Takagi
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Patent number: 5501585Abstract: In an oil pump having an inner rotor and an outer rotor supported in a housing, pressure in a pumping chamber whose volume is at maximum presses the inner rotor inwardly and the outer rotor outwardly. An oil groove which communicates with a discharge port via a lubricating groove is formed in an inner surface of the housing at the circumferential position of the pumping chamber whose volume is at maximum. The oil groove has axial sealing surfaces.Type: GrantFiled: November 28, 1994Date of Patent: March 26, 1996Assignee: Aisin Seiki Kabushiki KaishaInventors: Tetsuyuki Ogawa, Hideki Nakayoshi
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Patent number: 5447421Abstract: In an hydraulic generator-receiver for power transmission, with an improved hydraulic balancing, balancing of the axial force of the driving gear is effected by varying the value of the surface of the permanent high pressure zone, so that this variation causes an application of the high pressure on a surface of one of the side plates, either greater, or lower, while the value of the permanent high pressure zone has no influence on the other side plate. In addition, the inter-sector zone is incorporated in the sectors of the envelope to balance the tangential force of the driving gear.Type: GrantFiled: November 18, 1993Date of Patent: September 5, 1995Inventor: Jean Malfit
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Patent number: 5032069Abstract: A hydraulic device has an inner rotor of cylindrical section mounted eccentrically within an outer rotor of tubular section. Angularly spaced axially extending ribs of part-circular cross-section are provided on the inner rotor and correspondingly spaced axial recesses of part-circular cross-section are provided on the opposed surface of the outer rotor, the ribs meshing with the recesses over an arcuate working zone in which a plurality of adjacent ribs engage corresponding recesses, the ribs moving relative to but in engagement with the recesses as they progress through the working zone. A baffle is located between the rotors to provide a seal therebetween outside the working zone and an inlet port is provided to the working zone adjacent the termination thereof relative to the direction of rotation of the rotors while an outlet port is provided adjacent the center of the working zone, the inlet and outlet ports being separated by at least the pitch of the ribs on the rotor.Type: GrantFiled: July 11, 1989Date of Patent: July 16, 1991Assignee: Jaguar Cars LimitedInventor: Bryan N. V. Parsons
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Patent number: 5032068Abstract: The instant invention relates to a displacement-type rotary system steam-turbine engine that among other mainly functions as a displacing-type steam engine. Through the partial utilization of the kinetic energy generated by the impinging steam molecules upon the rotor blades said invention functions additionally similar to a radial flow turbine.Type: GrantFiled: August 16, 1990Date of Patent: July 16, 1991Inventor: Waldemar H. Kurherr
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Patent number: 4820138Abstract: A gear-within-gear positive displacement pump, such as an automotive fuel pump, is disclosed having a pump chamber, an internal gear within the pump chamber, and an external gear within the internal gear. The pump chamber has an inlet and an outlet. The external gear is rotatably driven thereby causing the internal gear to rotate and further causing the teeth of the internal and external gears to unmesh thereby drawing fluid into the pump chamber between the gears and further causing the teeth of the gears to mesh so as to positively force the fluid out of the pump chamber. A pressure balancing passage way is provided between the portion of the pump housing in which the gear teeth mesh thereby permitting fluid under pressure to be directed to the exterior of the internal gear so as to pressure bias the internal gear generally toward the inlet and to at least in part balance the pressure forces on the internal gear with a consequent reduction of noise and increase in pump efficiency.Type: GrantFiled: September 25, 1987Date of Patent: April 11, 1989Assignee: Carter Automotive Company, Inc.Inventor: Steven R. Bollinger
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Patent number: 4384831Abstract: A scroll-type fluid apparatus including an orbiting scroll member, a stationary scroll member, and a plurality of pockets formed in at least one of the orbiting scroll member and the stationary scroll member to cooperate with the other scroll member for confining liquid therein. When an axially urging force is ecerted on the orbiting scroll member, a liquid pressure commensurate with the axially urging force is produced in the pockets, so that such liquid pressure cancels out a biased axially urging force (moment) exerted on the orbiting scroll member.Type: GrantFiled: May 15, 1980Date of Patent: May 24, 1983Assignee: Hitachi, Ltd.Inventors: Masato Ikegawa, Masaya Imai, Kenji Tojo, Masao Shiibayashi
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Patent number: 4358258Abstract: A liquid displacement device which utilizes an internal unit assembly type construction wherein the internal unit assembly can be installed in or removed from a cavity in the housing of the device as a unit. The internal unit assembly includes a pair of meshed gears, which are rotatably supported by a pair of axially spaced end plates disposed on opposite sides of the gears. The internal unit assembly also includes at least one pair of thrust members and at least one corresponding pair of axial pressure loading chambers which bias the thrust members in a direction to counterbalance the axial components of the pressure force at the discharge side of housing that tends to separate the end plates from predetermined positions with respect to the side faces of the gears.Type: GrantFiled: August 10, 1981Date of Patent: November 9, 1982Assignee: Fluid Energy Systems CorporationInventor: John L. Nagely
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Patent number: 4350479Abstract: A scroll-type fluid machine is provided with a plurality of liquid-confining pockets formed in the sliding surface of the end member of either one of orbiting and stationary scrolls. In operation, a high liquid pressure is generated in the pocket or pockets positioned in the region where a localized high axial urging force is exerted during operation, so that the localized high axial urging force acting on the two scrolls is partially or fully negated.Type: GrantFiled: April 9, 1980Date of Patent: September 21, 1982Assignee: Hitachi, Ltd.Inventors: Kenji Tojo, Masato Ikegawa, Masao Shiibayashi, Masaya Imai
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Patent number: 4213746Abstract: A high pressure internal gear pump has an inner rotor with outer gear-type teeth inside of an outer rotor with inner gear type teeth. The outer rotor is eccentrically revolving relatively to the inner rotor, whereby the gear-teeth are meeting each other as known from the former art. A half-moon like part is provided between the inner and outer rotor as usual in such pumps. The invention provides slots for the reception of pressure in the part between the teeth or in the housing surrounding the outer rotor. The pressure in said slot or slots presses the neighboring portions against the inner- and/or outer rotor for more perfect seal at high pressure. In addition an axially adjusting thrust body may be provided to seal the ends of the rotors. The mentioned slots may have enlargements on suitable locations in order to make the adjacent sealing parts more flexible for suitable sealing engagement with the respective portions of the rotors.Type: GrantFiled: December 8, 1977Date of Patent: July 22, 1980Inventor: Karl Eickmann
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Patent number: 4184820Abstract: In an internal gear pump or motor the insert control member between the inner and the outer gear is provided with balancing pockets, which receive fluid under pressure to counter-balance the pressure forces exerted onto the inner and outer gear of the device. Thereby it is obtained, that the radial forces of fluid onto the inner and outer gear are balancing each other by diametrically located oppositional directed fields of force of pressure in fluid. The inner and outer rotors such float freely between radial forces of fluid. Radial rest loads are prevented and the life of the rotors is extended. There may be a single insert or a plurality of inserts and there may be one or a plurality of suction chambers in the device. Additional outer guide means or pressure fields of fluid under pressure may be provided. The loading of the balancing pockets with pressure fluid may be done through respective passages from areas under pressure to said balancing pockets.Type: GrantFiled: February 16, 1978Date of Patent: January 22, 1980Inventor: Karl Eickmann
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Patent number: 4132514Abstract: A high pressure hydraulic gear pump or motor of the internally geared type with a radially movable sealing plate arranged on one side of the filler member so as to form a seal against one gear, while the filler member forms a seal against the other gear, the sealing plate being arranged in a floating mode, with a sealing batten underneath it and springs biasing the plate and the batten radially outwardly. Pressure space delimiting control edges and tooth prefill passages are arranged on the sealing plate and on the filler member.Type: GrantFiled: February 10, 1977Date of Patent: January 2, 1979Inventor: Otto Eckerle
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Patent number: 4132515Abstract: A gear pump or motor comprising a body having a cavity with high pressure and low pressure ports. A pinion, an internally toothed ring gear meshing together, a filling member interposed between pinion and ring gear and an arcuate bearing member are housed within the cavity. The pinion has a shaft which is journalled in the body. The arcuate bearing member is interposed between the periphery of the ring gear and the body wall near the low pressure port and yieldingly supports the ring gear such that the latter can shift in a direction of a plane of eccentricity containing the axis of rotation of the pinion and the ring gear. The arcuate bearing member defines, at its outer face, an area of low pressure, which is smaller than a further area of low pressure at its inner face which areas of low pressure are connected to one another.Type: GrantFiled: January 5, 1978Date of Patent: January 2, 1979Inventor: Heinz W. Kruger