| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 261 | Oil pump | US13014034 | 2011-01-26 | US08920148B2 | 2014-12-30 | Masateru Nakagawa; Nobukazu Ike; Takuro Iwase; Tomohiro Umemura; Noriyasu Ariga; Katsunori Ishikawa; Masashi Narita |
| 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. | ||||||
| 262 | INTERNAL-GEAR-TYPE OIL PUMP FOR VEHICLE | US14357366 | 2011-11-10 | US20140314608A1 | 2014-10-23 | Hiroyasu Honda |
| A vehicular internal-gear-type oil pump provided with (a) a circular pump chamber defined by a pump body and a pump cover, (b) an annular driven gear which has internal teeth, and an outer circumferential surface opposed to an inner circumferential surface defining said pump chamber, and which is rotatably supported by the inner circumferential surface defining said pump chamber, and (c) a drive gear which has external teeth engaging with the internal teeth of said driven gear and which is disposed rotatably about an axis of rotation thereof eccentric with respect to an axis of rotation of said driven gear, to rotate said driven gear, characterized in that wherein: said driven gear has a plurality of first dynamic pressure generating grooves formed in local areas of its outer circumferential surface; and each of said first dynamic pressure generating grooves has a depth in a radial direction of the driven gear, which depth is determined such that a gap ratio which is a ratio of a distance of a gap from a bottom of said first dynamic pressure generating groove to said inner circumferential surface to a distance of a gap from the outer circumferential surface of said driven gear to said inner circumferential surface is held within a predetermined range in which a dynamic pressure generated by said first dynamic pressure generating grooves and changing as a function of said gap ratio has a maximal value and in which a fluid friction coefficient generated on the basis of said first dynamic pressure generating grooves and changing as a function of said gap ratio has a minimal value. | ||||||
| 263 | Gear pump | US12769702 | 2010-04-29 | US08821140B2 | 2014-09-02 | Dan Paval; Ivan Polancec |
| A gear pump having double-helical gears with bearing assembly seals and gear end seals which provided double seal interfaces between the pump cavity and bearing cups having disposed therein bearing assemblies for supporting pump shafts for rotation. The double seal interfaces preclude pumped fluid, particularly contaminated fluid including entrained abrasives from making contact with the bearing assemblies. An adjustable packing seal mechanism, a gear gap adjustment mechanism, a fluid pressure relief system, and pump heat exchanger features are also disclosed. | ||||||
| 264 | ROTARY PUMP AND BRAKING SYSTEM HAVING THE SAME | US14062056 | 2013-10-24 | US20140117748A1 | 2014-05-01 | Kazunori Uchiyama; Naoki Hakamada; Kazuhide Uchida; Yasuhiro Kawase; Takahiro Yamaguchi; Tomoaki Kawabata; Kunihito Ando; Tadayoshi Usami |
| 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. | ||||||
| 265 | Two-Spindle Screw Pump of Double-Flow Construction | US13754689 | 2013-01-30 | US20130202473A1 | 2013-08-08 | Weshen Christov; Hans Jung |
| The invention relates to a twin screw pump of double-flow design with a pump housing, two bearing portions and at least one gear portion with at least one gear chamber, with feed screws with double-flow flanks arranged on two shafts, the feed screws on the shafts having a root diameter, the shafts being mounted in the bearing portions via bearings, a seal for sealing the bearing portion with respect to the conveying portion, with gearwheels arranged on the shafts in the gear portion, the shafts being rotatably coupled by means of said gearwheels, characterized in that on either side the inner diameter of the seal is greater than, or the same size as, the root diameter of the feed screws, and/or in that on either side the inner diameter of the bearing is greater than, or the same size as, the inner diameter of the seal. | ||||||
| 266 | GEROTOR PUMP | US13644660 | 2012-10-04 | US20130089452A1 | 2013-04-11 | Hyuntae LEE |
| 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. | ||||||
| 267 | GEAR PUMP | US12769702 | 2010-04-29 | US20110268598A1 | 2011-11-03 | DAN PAVAL; IVAN POLANCEC |
| A gear pump having double-helical gears with bearing assembly seals and gear end seals which provided double seal interfaces between the pump cavity and bearing cups having disposed therein bearing assemblies for supporting pump shafts for rotation. The double seal interfaces preclude pumped fluid, particularly contaminated fluid including entrained abrasives from making contact with the bearing assemblies. An adjustable packing seal mechanism, a gear gap adjustment mechanism, a fluid pressure relief system, and pump heat exchanger features are also disclosed. | ||||||
| 268 | Dual rotor oil pump of an engine with balance weight arrangement | US12018362 | 2008-01-23 | US07985055B2 | 2011-07-26 | Min Sig Shin; Myung Rae Cho; Hong Wook Lee; Wootae Kim; Jin Woo Cho |
| A balance shaft function may be realized without employing a balance shaft, when an oil pump includes an inner rotor fixed to the rotation shaft and an outer rotor that rotates with the inner rotor if at least one rotor of the inner and outer rotors has a mass center formed apart from a rotation center. | ||||||
| 269 | ROTARY DISPLACEMENT PUMP | US12687230 | 2010-01-14 | US20100183454A1 | 2010-07-22 | Klaus Lübke; Sven Borghoff; Sebastian M. Siegmund; Andreas Klomfass |
| A rotary displacement pump (2) for pumping a medium, having a pump housing (3); a reception chamber (4) which is formed in the pump housing (3), with an inlet area (26) and an outlet area (27); at least one rotary displacement element (5, 6) which is accommodated in the reception chamber (4), and which is rotatably attached by means of at least one bearing (40, 41, 56) in the pump housing (3), and which presents at least one delimitation surface (21), by means of which it delimits at least one work space (19) of the pump (2); and a bypass (59) which allows the return flow of a part of the pumped medium from the outlet area (27) into the inlet area (26). The rotary displacement element (5, 6) and/or a rotating part (35) which is connected to the rotary displacement element can present at least one counter surface (64) which delimits the bypass (59), and whose counter surface normal (65) has at least one component which is directed opposite to the delimitation surface normal (66) of the delimitation surface (21). | ||||||
| 270 | ELECTRIC PUMP | US12349651 | 2009-01-07 | US20090175751A1 | 2009-07-09 | Hideki Nakayoshi |
| 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. | ||||||
| 271 | External gear hydraulic pump with acoustical insulation | US12247313 | 2008-10-08 | US20090097992A1 | 2009-04-16 | Francois Fischer; Laurent Graissaguel; Nicaise Lesther |
| The invention concerns an external gear hydraulic pump including a pump body housing rotating pinions that mutually engage. Located on opposite sides of the body are a cover and a support, forming an outlet manifold for high pressure fluid. Acoustic insulation elements damp the vibrations produced by the pinions. The acoustic insulation elements acoustically decouple the pump body from the support. | ||||||
| 272 | Gear pump | US11263358 | 2005-10-31 | US07495575B2 | 2009-02-24 | Arkardiusz Tomzik; Florian Axmann; Michael Baumann |
| A gear pump for the dosed conveyance of pigmented lacquers or paints and which is adapted for use with a painting robot. The gear pump comprises two toothed wheels meshing with one another and which are mounted within a pump housing in such a manner that they can be rotated by a driven drive shaft and a fixed bearing shaft. For this, the drive shaft is mounted by a bearing section at multiple points in a pump housing and a coupling section of the drive shaft projects out of the pump drive to connect to a drive. In order, on the one hand, to avoid wear due to high pressure forces and, on the other hand, to absorb a pronounced load from the outside, a supporting bearing for the radial and axial support of the drive shaft is formed on the drive shaft's coupling section projecting outside of the pump housing. | ||||||
| 273 | Balancing plate—shuttle ball | US11131505 | 2005-05-18 | US07322808B2 | 2008-01-29 | Richard Daigre |
| A pressure compensation mechanism for a gerotor motor is disclosed, which mechanism includes a shuttle valve that selectively interconnects either port to a single pressure chamber and thus to compensate for any pressure-induced imbalances in the device. | ||||||
| 274 | Gear pump and liquid injection apparatus | US11002232 | 2004-12-03 | US07296984B2 | 2007-11-20 | Mitsutaka Iwasaki |
| A gear pump includes a housing defining an accommodating chamber and a cover for sealing the accommodating chamber. The accommodating chamber accommodates a drive gear and a driven gear. Each of the drive gear and the driven gear includes an upper surface opposed to the cover and a lower surface opposed to the housing. An annular projection projects from the upper surface of the drive gear or the driven gear for contacting the seal plate. An annular projection projects from the lower surface of the drive gear or the driven gear for contacting the seal plate. The gear pump is capable of lowering the load when the drive gear and the driven gear are rotated. | ||||||
| 275 | Compact Eccentric Screw Pump | US11763553 | 2007-06-15 | US20070253852A1 | 2007-11-01 | Helmuth Weber |
| The invention relates to a compact eccentric screw pump including a sliding articulation. The long-lasting operation of the pump is ensured by a plurality of functions. According to the invention, both the reaction pressure resulting from the transport pressure and the concomitant phenomena emerging from the eccentrically rotating rotor and acting on the articulation and the drive are approximately equalized. | ||||||
| 276 | Flanged gear pump | US10491990 | 2002-10-23 | US07144234B2 | 2006-12-05 | Clément Kiefer |
| The invention concerns a gear pump comprising a pump body (2) closed with a cover (3) forming a cavity wherein is provided a drive pinion (4) capable of being driven in rotation by a drive shaft (1) whereto it is fixed, a driven pinion (5) whereof the teeth co-operate with the drive pinion (4) teeth so as to be driven in rotation thereby and two end shields (8) arranged on either side of the driven pinion (5) penetrating into a cavity (10) provided therefor in the pump body (2) and the cover (3) respectively, means being provided for exerting pressure on the outer surface of the end shields. In order to prevent the cover from being deformed under the effect of the pressure thereby creating a leakage zone between the delivery zone and the suction zone, the end shields each consist of a disc (8) integral with one end of the driven pinion (5), the discs (8) and the driven pinion (5) being concentric, the discs (8) covering the teeth of the driven pinion (5). The pressure exerted on the outer surface of the discs prevents them from being deformed such that practically no axial leakage zone is formed. Additionally, the discs can serve as guiding axis for the rotation of the driven pinion. | ||||||
| 277 | Self-priming positive displacement constant flow high capacity pump | US10963071 | 2004-10-12 | US20060083638A1 | 2006-04-20 | Richard Hibbard; Billye Hibbard |
| A rotary action, self-priming positive displacement constant flow high capactity fluid pump is described. None of the pump parts touch in the pump chamber to minimize pump wear allowing for extended pump live. Since there are no touching parts in the pump chamber, the pump can be operated dry without the pump liquid being present without damage to the pump. The pump may be operated either clockwise or counter-clockwise without loss of positive displacement or reduction in fluids input or output. Due to the design of the pump, the pump is inherently low-maintenance and is highly resistant to clogging by debris and the like. Fluid pressure relief sections are provided by carving out of the inside portions of the housing structure to which the ends of the shaft are mounted to vary or improved pump performance. | ||||||
| 278 | Pump assembly | US11108439 | 2005-04-18 | US20050232784A1 | 2005-10-20 | Martin Yates; Andrew Stiles; Blair Geoffrey Ramsay |
| A pump assembly comprises first and second gear pumps (10, 13), each of which has a respective driver gear (11, 14) and a respective driven gear (12, 15), wherein the driven gear (12) of the first gear pump (10) is arranged to drive the driver gear (14) of the second gear pump (13). | ||||||
| 279 | Motor pump with balanced motor rotor | US10340930 | 2003-01-13 | US06861777B2 | 2005-03-01 | Robert R. Kimberlin; Robert E. Harvey, III; William M. Larson; William C. Rawnsley, Jr.; Jie Jiang |
| A motor pump is provided in which the motor rotor is optimally force balanced for enhanced operation. The motor pump includes a pump head for pressurizing a fluid, and an electric motor drives the pump head. High pressure fluid is circulated through the motor air gap. The shaft of the motor rotor is axially movable with respect to the pump head such that the motor rotor is effectively floated in high pressure fluid as the fluid flows through the motor. | ||||||
| 280 | Flanged gear pump | US10491990 | 2004-04-07 | US20040265147A1 | 2004-12-30 | Clement Kiefer |
| The invention concerns a gear pump with a pump body closed with a cover forming a cavity in which is provided a drive pinion, a driven pinion whose teeth cooperate with the drive pinion teeth, and two end shields arranged on either side of the driven pinion penetrating into a cavity provided in the pump body and the cover respectively, pressure being exerted on the outer surface of the end shields. The end shields each consist of a disc integral with one end of the driven pinion, the discs and the driven pinion being concentric, the discs covering the teeth of the driven pinion. The pressure exerted on the outer surface of the discs prevents them from being deformed such that practically no axial leakage zone is formed. Additionally, the discs can serve as guiding axis for the rotation of the driven pinion. | ||||||
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