| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 21 | Engine | US77687458 | 1958-11-28 | US2975718A | 1961-03-21 | HODGSON ROBERT F |
| 22 | Pump-multiple piece bushing | US2864648 | 1948-05-22 | US2527941A | 1950-10-31 | LAUCK JOHN A; COMPTON JAMES A |
| 23 | Motor-pump unit | US14664349 | 2015-03-20 | US10060432B2 | 2018-08-28 | Reinhard Pippes; Dominik Ketterer |
| A motor pump unit with a multipart housing comprises a reversible internal gear machine and an electric motor with a rotor and a stator, which is coupled to the internal gear machine via a shaft rotatably mounted in the housing. One shaft end extends from the internal gear machine axially through the rotor that is carried by the shaft. First and second connecting channel ends in the working chamber of the internal gear machine are connected via check valves in the housing to a leakage channel loop, which is fluidically connected to a leakage channel that is fluidically connected to the working chamber, and which has a shaft leakage channel extending axially through the shaft and a rotor leakage channel that is fluidically connected thereto and extends axially through the rotor and/or a gap leakage channel between the rotor and stator, which is fluidically connected to the shaft leakage channel. | ||||||
| 24 | PUMP APPARATUS AND MARINE VESSEL PROPELLING MACHINE | US14866039 | 2015-09-25 | US20160265526A1 | 2016-09-15 | Takahiko SAITO; Atsushi KAGAWA; Hayato TSUTSUI |
| A pump apparatus includes a shaft, a first pump, and a second pump. The first pump includes a first driving gear disposed on the shaft in a first phase and rotatable with the shaft to feed a first operating fluid. The second pump includes a second driving gear disposed on the shaft in a second phase shifted from the first phase. The second driving gear is coaxial with the first driving gear and rotatable with the shaft to feed a second operating fluid. | ||||||
| 25 | PUMP DEVICE AND SHIP PROPULSION MACHINE | US14866427 | 2015-09-25 | US20160265358A1 | 2016-09-15 | Takahiko SAITO; Atsushi KAGAWA; Hayato TSUTSUI |
| A pump device includes a shaft, a first gear pair, a second gear pair, a support pin, and a casing. The first gear pair includes a first driving gear which is disposed on the shaft and is rotatable together with the shaft, and a first driven gear driven by the first driving gear. The second gear pair includes a second driving gear which is disposed on the shaft coaxially with the first driving gear and is rotatable together with the shaft, and a second driven gear driven by the second driving gear and arranged coaxially with the first driven gear. The support pin penetrates the first driven gear and the second driven gear and rotatably supporting the first driven gear and the second driven gear. The casing covers the first gear pair and the second gear pair. The support pin is fitted to the casing to be fixed. | ||||||
| 26 | Bi-Rotational Hydraulic Motor With Optional Case Drain | US12712335 | 2010-02-25 | US20110206549A1 | 2011-08-25 | Steven Buell |
| 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. | ||||||
| 27 | Vane-type hydraulic motor | US10525009 | 2003-08-12 | US07273360B2 | 2007-09-25 | Masao Shinoda; Chishiro Yamashita; Shimpei Miyakawa |
| A vane-type hydraulic motor includes a rotor (30) having a main shaft (70) and a plurality of vanes (35), a cam casing (10) having a chamber (11) for rotatably housing the rotor (30), a first port (13) and a second port (15) for supplying a working fluid into the chamber (11) and discharging the working fluid from the chamber (11). A bypass path (80) is provided for allowing the working fluid to flow from bearing portions (51, 61) supporting the main shaft (70). A drain port (17) is provided for discharging the working fluid to the exterior. | ||||||
| 28 | Vane-type hydraulic motor | US10525009 | 2003-08-12 | US20060104847A1 | 2006-05-18 | Masao Shinoda; Chishiro Yamashina; Shimpei Miyakawa |
| A vane-type hydraulic motor includes a rotor (30) having a main shaft (70) and a plurality of vanes (35), a cam casing (10) having a chamber (11) for rotatably housing the rotor (30), a first port (13) and a second port (15) for supplying a working fluid into the chamber (11) and discharging the working fluid from the chamber (11). A bypass path (80) is provided for allowing the working fluid to flow from bearing portions (51, 61) supporting the main shaft (70). A drain port (17) is provided for discharging the working fluid to the exterior. | ||||||
| 29 | Hydraulic pump utilizing floating shafts | US09882405 | 2001-06-14 | US06716011B2 | 2004-04-06 | Srinivas Bhagavatula |
| A hydraulic pump assembly includes a pump housing having a chamber defined therein, wherein the chamber includes a pair of cylindrically shaped portions each defining at least one end wall. The hydraulic pump assembly also includes a pair of rotary pump elements disposed for rotation within the cylindrically shaped portions of the chamber, and which cooperate to create a hydraulic pressure. The hydraulic pump assembly further includes a pair of cylindrically shaped shafts each having at least one end wall, and disposed within the pair of cylindrically shaped portions of the chamber and within the pair of pump elements. The shafts are fixed for rotation and are axially shiftable with respect to the pump elements. A hydraulic fluid within the chamber stabilizes at least one of the axially shiftable shafts such that the end face of the shaft is spaced from the end wall of the cylindrically shaped portion of the chamber when the hydraulic pump is in use. | ||||||
| 30 | Hydraulic pump utilizing floating shafts | US10409789 | 2003-04-09 | US06692244B2 | 2004-02-17 | Srinivas Bhagavatula |
| A hydraulic pump assembly includes a pump housing having a chamber defined therein, wherein the chamber includes a pair of cylindrically shaped portions each defining at least one end wall. The hydraulic pump assembly also includes a pair of rotary pump elements disposed for rotation within the cylindrically shaped portions of the chamber, and which cooperate to create a hydraulic pressure. The hydraulic pump assembly further includes a pair of cylindrically shaped shafts each having at least one end wall, and disposed within the pair of cylindrically shaped portions of the chamber and within the pair of pump elements. The shafts are fixed for rotation and are axially shiftable with respect to the pump elements. A hydraulic fluid within the chamber stabilizes at least one of the axially shiftable shafts such that the end face of the shaft is spaced from the end wall of the cylindrically shaped portion of the chamber when the hydraulic pump is in use. | ||||||
| 31 | Gear pump | US842714 | 1992-02-27 | US5253988A | 1993-10-19 | Alfred K. Hunziker; Fritz Haupt; Eduard Mischler; Stefan Kalt |
| Method and apparatus for on-site cleaning of a gear pump by coupling the gear pump outlet to the gear pump inlet and to the inlet end of the passage and which bypasses the bearing and is preferably controlled by a valve element which can block off the bypass in normal operation and be opened for a cleaning operation to increase the pressure on the side of the bearing connected to the inlet and thereby increase the velocity of the flushing stream. | ||||||
| 32 | Method for providing pump drip collector | US729261 | 1991-07-12 | US5168626A | 1992-12-08 | Ronald L. Dorski; Steven F. Baker |
| A pump drip collector is easily provided to a pump housing of a particular shape. A cylindrical drum of L-shaped cross section, incapable of serving as a drip collector by itself, is adapted to be freely pressed over a cylindrical protrusion from a flat face of the pump housing. When a circular end edge of the drum engages the face, it is spun welded in place. Thereafter, the drum and pump face together provide a complete drip collector. The drum may also pilot on the outside of the protrusion to maintain concentricity during the spinning process. | ||||||
| 33 | Drain for internal gear hydraulic device | US183196 | 1988-04-19 | US4881880A | 1989-11-21 | Andrew N. Dlugokecki |
| An improved, high-pressure fluid draining, internal gear hydraulic device of the type having a rotatable valve plate which selectively communicates inlet and outlet ports of a commutator with opening and closing fluid chambers between internal and external gear. The valve plate has radially extending drain ports which drain high pressure fluid from the area inside the valve plate to a check valve system outside the valve plate. This check valve system can drain to a low pressure fluid port of the device such as the inlet or outlet of the pump. | ||||||
| 34 | Oil pump for automatic transmission with effective sealing arrangement | US176007 | 1988-03-31 | US4850832A | 1989-07-25 | Kazuya Murota |
| A pump housing is formed with a recess receiving therein pump elements, and a pump cover is secured to the pump housing to close the recess. The pump cover and the pump housing define an interface area therebetween formed with a pump discharge port. The pump casing is provided with a predetermined passage which normally serves as an oil pressure delivering passage, but serving as a drain passage under a condition when the oil pump discharge pressure increases. The predetermined passage is open within said interface area via a groove extending around the pump discharge port. | ||||||
| 35 | Positive displacement machine, more particularly pump, and method for fabricating such pump | US928177 | 1986-12-01 | US4789315A | 1988-12-06 | Kurt Guettinger |
| The machine comprises two plate-like supports (9, 12) each provided with a crown of displacement blades (10), respectively displacement chambers (11), engaged into each other, and displaceable into a relative circular translation motion. The drive is implemented by a gear (7-9) at the center of the supports (9, 12), which exerts a force (F.sub.N) on one of the supports (9) at a radially displaceable position, said force presenting a radial component (F.sub.R) and a tangential component (F.sub.T). The direction of the force and the arrangement of the chambers (11) are so selected as to provide for a predetermined static position of the blades (10) in the chambers (11) independently of the wear. Optimum operation conditions are thus obtained with simple design and fabrication. For producing said pump, the plate-like supports are lapped pair-wise when they are in the state of blanks in conditions similar to the operation conditions and are then mounted in the machine. | ||||||
| 36 | Hydraulic motor | US3718411D | 1971-09-14 | US3718411A | 1973-02-27 | POLLMAN F |
| A rotary hydraulic motor including a stator having a central cylindrical cavity with radial slots communicating with the cavity and containing reciprocable sealing rollers, a cam rotor in the cavity with a peripheral cam surface including a plurality of cam lobes with intervening lows engaging the sealing rollers to form displacement chambers, a pair of port plates secured to opposite sides of the rotor for rotation therewith including outwardly disposed portions slidably engaging the sides of the stator adjacent the roller slots, an annular array of alternate inlet and outlet ports in each port plate adjacent the roller slots in the stator, and a pair of pressure plates disposed against the surfaces of the port plates remote from the rotor and the stator. Pressure chambers around the periphery of the port plates reduce deflection of the plates, and pressure chambers behind each pressure plate seal the port plates in the housing. The rotor is constructed with passages communicating the inlet ports in the two port plates and passages communicating the outlet ports in the two port plates. Provision is made for supplying pressure acting in the outer ends of the slots to urge the rollers toward the cam.
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| 37 | Hydraulic gear-pumps and gear-motors | US3481275D | 1968-04-12 | US3481275A | 1969-12-02 | GELIN ROBERT |
| 38 | Rotary fluid displacement device and mechanism therefor | US18120350 | 1950-08-24 | US2758548A | 1956-08-14 | ROCKWELL EDWARD A |
| 39 | Rotary pump and the like | US23281227 | 1927-11-12 | US1702046A | 1929-02-12 | FULLERTON ALBERT L |
| 40 | A GEAR PUMP HAVING THROUGH-SHAFT BEARING WEEPAGE CONTROL | US15312346 | 2015-04-15 | US20170089335A1 | 2017-03-30 | Justin A. Craig; Philip Taylor Alexander |
| A pump includes a front plate, a gear plate and a rear plate. A drive shaft has a drive gear, an arbor has a driven gear engaged with the drive gear, and first and second bearings are disposed in the gear plate. The first and second bearings receive the drive shaft and the arbor. The rear plate has drain ports adjacent ends of the drive shaft and the arbor. The arbor has an opening such that media that passes between the first bearing and an outer surface of the arbor is directed to the second drain port via the opening. A drain bushing is positioned against the front plate, and includes an opening for the drive shaft. The drain bushing has a chamber and a radial port. When pumped media passes between the first bearing and the drive shaft it is directed to the chamber and out the radial port. | ||||||
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