| 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 | Hydraulic pumps | US95598 | 1998-06-11 | US6048185A | 2000-04-11 | Atsushi Ishizuka; Mitsuhiro Aota |
| A hydraulic pump includes a pump body having a bearing hole and formed with a seal chamber at an end of the bearing hole and an oil groove therein, the oil groove ensuring hydraulic communication between the pump unit and the seal chamber, a pump cover attached to the pump body to define a concavity for accommodating a pump unit, and a drive shaft arranged through the bearing hole of the pump body. A bearing bush, which is arranged through the bearing hole of the pump body to support the drive shaft, includes bush lugs disposed in the axial direction of the bearing hole of the pump body. Two of the bush lugs disposed at both ends of the bearing bush have seams located circumferentially distant from each other. | ||||||
| 262 | Rotary mower spindle and hydraulic motor | US974789 | 1997-11-20 | US6010321A | 2000-01-04 | Frederick E. Forsythe; Chad D. Nelson |
| A gear motor has a hydraulic oil drain path through bearings which support the spindle and mounted mower blade. The drain path is through two plain bearings and two opposed thrust bearings to a low pressure port located adjacent to the spindle shaft seal. A drain from the low pressure port through one of the hydraulic motor shafts leads to the case drain. A check valve prevents fluid from leaking through the drain should the spindle shaft seal fail. The plain bearings and thrust bearings have a press fit insert in the shape of a cylinder with a planar lip. The cylinder portion of the insert forms the plain bearing and the planar lip of the insert forms the thrust bearings. The bearing insert cylindrical surfaces have two helical grooves which extend across the cylindrical surface to conduct lubricating oil through the plain bearings. The grooves in the plain bearings communicate with similar grooves in the thrust bearings. | ||||||
| 263 | Lubricating means for a gear pump | US560736 | 1995-11-20 | US5641281A | 1997-06-24 | Charles R. Russell; Fernie E. Williams |
| An improved self-lubricating bearing arrangement for gear pumps utilizes a system of material feed channels and reservoir pockets to divert a portion of the material being pumped from the pressure side of the intermeshing gears to lubricate the gear-supporting shafts within the bearing arrangement. At each gear shaft, a linear material feed channel is formed in the radial face of the bearing between a pressure relief recess and an axial opening supporting the shaft and a parabolic reservoir pocket is formed within the bearing opening adjacent the shaft to apply diverted polymer to the shaft. Each material feed channel and reservoir pocket is polished to a mirror finish to minimize any tendency of suspended additives in the polymer from adhering to or collecting within the channels or pockets, thereby to prevent unusual or localized wearing of the gear shafts. | ||||||
| 264 | Variable-displacement vane pump | US49338 | 1993-04-21 | US5273408A | 1993-12-28 | Kazuyoshi Yuge |
| A lubricating groove not communicating with other oil passages and extending in the circumferential direction is provided on the side surface of a cam ring. The central portion in the circumferential direction of the lubricating groove is located at the center of the suction side, and both ends of the lubricating groove reach the positions beyond a straight line joinning the upper and lower dead points. As a result, the side surface of the cam ring of the variable-displacement vane pump is prevented from seizing. | ||||||
| 265 | Gear wheel mechanism | US117364 | 1987-10-28 | US4905535A | 1990-03-06 | Werner Ludwig; Rainer Nickel |
| A hydrostatic gear wheel mechanism has two intermeshing gear wheels in the work space of a housing. To continuously rinse the gear wheel and housing surfaces which slide on each other, grooves on the gear wheel convey lubricant from the work space to between the gear wheel front faces and the axial end walls of the work space. | ||||||
| 266 | Variable vane-type pump | US550609 | 1983-11-10 | US4770616A | 1988-09-13 | Manfred Kahrs |
| A variable vane-type pump in which a cam ring with variable eccentricity encompasses a rotary piston comprising vanes guided in radial slots. At least one lateral surface of the rotary piston abuts on the contact surface of a control disc with pressure pocket and suction pocket. A channel is provided in the control disc whose intake opening is disposed in the direction of rotation of the pump between pressure pocket and suction pocket and in direct vicinity of the end of the pressure pocket. The channel terminates in a housing chamber, the waste oil chamber, the lubricating channels and/or into the under-vane chambers. After displacement of the cam ring, a connection can be established between the channel and the pressure pocket so that the pressure fluid still delivered can discharge via the channel to safeguard lubrication of the pump. | ||||||
| 267 | Methods and apparatus for gear pump lubrication | US98232 | 1979-11-28 | US4470776A | 1984-09-11 | Theodore P. Kostek; David W. Francis |
| A gear pump structure is provided having a housing with a pump chamber, a suction chamber and a discharge chamber communicating with said pump chamber on opposite sides thereof, a suction port and a discharge port in said housing communicating respectively with the suction chamber and discharge chamber, each of said ports have spaced apart inlet and outlet means, said suction port being contoured to provide on introduction of fluid into the inlet end a point intermediate its inlet and outlet means having a pressure higher than the pressure at the inlet and outlet means, at least one pair of meshing gears mounted for rotation in said pump chamber and each having two axially spaced trunnions, a plurality of bearing means in said housing each having an axial bore mounting said trunnions for rotation in the pump chamber, drive means for rotating said gears so that liquid which is drawn through the suction port into the suction chamber is engaged by teeth on said gears and transferred to the discharge port under pressure, fluid passage means connecting the ends of said bearing means remote from the gears with said point of high pressure intermediate the inlet and outlet means of the suction port delivering fluid to said bearing means ends, a recess in each end wall of the pump chamber connecting the bearing means along a line spaced from a center line through said bearing means toward the suction chamber and communicating with said suction chamber as the gears rotate, said recess defining with the teeth of the rotating gears a low pressure chamber receiving fluid from the fluid passage means through the bearing means into said recess whereby low pressure lubrication of the bearing means and trunnions is provided. | ||||||
| 268 | Bearing lubrication system for gear pump having clearance between bearing and housing wall for preventing entry of contaminants larger than lubrication passage | US52789 | 1979-06-28 | US4289460A | 1981-09-15 | Godwin L. Noell; Paul L. Haynes, Jr. |
| A gear pump suitable for pumping contaminated fuel has a lubrication passage in a pump bearing which receives fuel from the clearance volume between the bearing and the housing in the pump discharge arc. The clearance entrance between the bearing and the housing, which functions as a filter, is smaller than the passage so that contaminants traversing the clearance will not obstruct the passage. Since only contaminants smaller than the clearance entrance can enter the passage, the passage may be made sufficiently small so as not to adversely affect pump performance. | ||||||
| 269 | Gear pump with low pressure shaft lubrication | US960940 | 1978-11-15 | US4265602A | 1981-05-05 | Hideo Teruyama |
| At least one pair of intermeshing impeller gears are supported by bearings such as bushings or roller bearings. Liquid drawn through the suction port is forced first to flow perpendicular to the axes of the gears toward one ends of the shafts or trunions thereof and then through a low pressure passage extended in parallel with the axes of the gears and communicated with the pump chamber in opposed relationship with the zone where the teeth of the gears are disengaging. Each bearing is formed with a lubrication or oil groove or passage. One port or end remote from the side face of the gear of the lubrication or oil groove is communicated with the low pressure passage at the closed end thereof or at a position adjacent to the inlet thereof through a passage while the other port or end is communicated through a passage with the low pressure passage at a position between the inlet and closed end thereof. Part of the liquid under low pressure drawn is forced to circulate through these passages and lubrication or oil grooves from the points adjacent to the inlet to the low pressure passage and at the closed end thereof to the points between the inlet and closed end thereof, whereby the bearings and shafts supported thereby may be lubricated and cooled. | ||||||
| 270 | Gear pumps with low pressure shaft lubrication | US873650 | 1978-01-30 | US4160630A | 1979-07-10 | Barry Wynn |
| An improved gear pump includes seal plates having lubrication channels communicating between the low pressure side of the zone where the gear teeth intermesh and the shaft bearings. Lubricant flow is directed first through one bearing on one side of the pump and then back through the other bearing on that side to the pump inlet chamber. Placement of the lubrication channels on the low pressure side of the pump where the volume between intermeshing teeth is increasing ensures that flow reversals in the bearings and lubricant aeration are avoided; and renders bearing flow rate less sensitive to pressure so that relatively large flow channels may be used in the wear plate. | ||||||
| 271 | Gear pump with low pressure shaft lubrication | US699167 | 1976-06-23 | US4090820A | 1978-05-23 | Hideo Teruyama |
| A gear pump is disclosed wherein the shafts of at least a pair of intermeshing gears are rotatably supported in bushings each with an axially extended lubrication groove formed in the bore of the bushing, one end of the lubrication groove being communicated through a low pressure chamber defined in the inner end face of the bushing with a portion of a suction port located adjacent to the root or dedendum circle of the gear while the other end of the lubrication groove being communicated with the suction port through a hole extended through the bushing or casing or notch formed therein, whereby part of the liquid drawn through the suction port upon rotation of the intermeshing gears is forced into the pressure chamber because of the fact that the liquid drawn into each tooth space of the gear is imparted with the impact speed directed in the radial direction of the tooth space due to the difference between the speed with which the liquid is drawn into the gear pump and the rotational speed of the intermeshing gears, and the liquid is circulated from the low pressure chamber through the lubrication groove, thereby lubricating and cooling the shafts rotating in the bushes. | ||||||
| 272 | Gear-type fluid motor or pump | US3637333D | 1968-10-18 | US3637333A | 1972-01-25 | DIXON KENNETH RAYMOND; SUGDEN DAVID BURNETT |
| This invention relates to a motor or pump of the gear-type including a housing containing a main gear and at least one pinion gear meshing with the main gear. A coupling means drivably engages with the main gear and is drivably engageable with a rotatable member which is driven or driving according to whether the unit is used as a motor or pump. The coupling means is such that the respective rotational axes of the main gear and the driven or driving member may be misaligned during use.
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| 273 | Hydrodynamic lubrication bearing | US3622212D | 1970-02-18 | US3622212A | 1971-11-23 | LAUMONT ROGER |
| A bearing for a journal lubricated by hydrodynamic lubrication has two helical grooves formed ahead of the load zone of the bearing. One groove has a relatively small pitch angle while the other groove is of greater width and has a much greater pitch angle. Such a bearing arrangement is particularly suitable for supporting stub shafts of gears in high-pressure gear-type pumps and motors.
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| 274 | Fluid-operated motor | US3572983D | 1969-11-07 | US3572983A | 1971-03-30 | MCDERMOTT HUGH L |
| A fluid-operated motor of the radial valve type, the motor having a hydraulically balanced and actuated valve-seating mechanism equally responsive to reversed motor-operating fluid flow and a positive circulation lubrication system providing controlled lubrication at all wear points during operation of the motor.
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| 275 | Gearing and lubricating means therefor | US3447472D | 1967-06-12 | US3447472A | 1969-06-03 | HODGES JOHN E; JOYNER PHILIP G; TOOGOOD GRAHAM J |
| 276 | Method and apparatus for lubricating gear pumps | US53677666 | 1966-03-23 | US3368799A | 1968-02-13 | ROBERT SLUIJTERS |
| 277 | Hydraulic pump or motor | US17548162 | 1962-02-26 | US3198127A | 1965-08-03 | BRUNDAGE ROBERT W |
| 278 | Vane type oil pump lubrication system | US76836758 | 1958-10-20 | US3065707A | 1962-11-27 | ZISKAL JOSEPH F |
| 279 | Pressure-balanced gear pump | US73084358 | 1958-04-25 | US2998783A | 1961-09-05 | LEE JOHN C |
| 280 | Gear pump | US50525455 | 1955-05-02 | US2932254A | 1960-04-12 | GERHARD BOOTH DOUGLAS; SPURGEON WOOD ROBERT |
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