| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 141 | Device for pumping oil | US744039 | 1985-06-12 | US4623305A | 1986-11-18 | Lars; H. Segerstrom |
| A device preferably utilized for pumping oil or other fluid from a drill hole in the ground, said device including a pump lowered into the hole and coupled to a drive motor situated under it. The pump comprises a hydraulic screw pump including a housing in which there is mounted a screw array in the form of a drive screw provided with a shaft coupled to the drive motor, and at least one running screw meshing with the drive screw. The rotational direction of the drive motor is such that the screw array pumps the liquid from an inlet, made radially in the housing and in communication with the liquid in the drill hole, to an outlet arranged at the end of the screw array remote from said shaft. | ||||||
| 142 | Bearings for gear pumps | US549680 | 1983-11-07 | US4573889A | 1986-03-04 | Jeffrey A. Lane |
| The bore of a bearing bush for a gear pump has a first recess located in a zone of load concentration in the bore, the first recess being supplied with a fluid under pressure. A second recess in the bore is located wholly outside the zone in which concentrated loads occur and acts as a reservoir for fluid, to prevent cavitation within the bore as a result of low pressures caused by radical movements of a shaft within the bush. A passage connects the second recess with a zone of lower pressure within the pump. | ||||||
| 143 | Centrifugal pump having means for counterbalancing unbalanced fluid pressure radial forces on rotor | US372169 | 1982-04-26 | US4445821A | 1984-05-01 | Kiyohiko Watanabe; Kazuma Matsui; Yoshiyuki Hattori; Toshihiro Takei; Toshiaki Nakamura; Shunsaku Ohnishi |
| A fuel pump apparatus has an electric motor and a regenerative pump having a pump housing and an impeller rotated by the motor shaft journalled by a bearing to the pump housing. The impeller is operative to produce in the pump housing a fluid pressure which is unbalanced in the circumferential direction of the impeller and forms circumferentially unbalanced radially inward forces the resultant force of which is applied through the impeller to a first side of the peripheral surface of the shaft. The discharge port of the pump is open to the interior space within the motor. An opening is formed in the bearing and has an inner end faced to a second side of the peripheral surface of the motor shaft substantially diametrically opposite to the first side, whereby the discharge pressure of the pump is applied through the motor interior space and through the opening in the bearing to the second side of the motor shaft to counterbalance to the resultant force of the circumferentially unbalanced radially inward forces applied to the motor shaft. | ||||||
| 144 | Rotary vane pump with pressure biased flow directing end plate | US258413 | 1981-04-28 | US4416598A | 1983-11-22 | Johann Merz |
| In a sliding vane type of rotary pump usable for power steering systems a seal of hour glass shape is provided between the flow directing plate, on the outlet side of the vane rotor and the outlet pressure chamber, to confine exposure of the high pressure of the outlet chamber to the downstream side of the plate within a predetermined area only partially balanced by exposure of the upstream side to such high pressure and to also isolate suction passages from the outlet chamber pressure. The result is a flexing of the flow directing plate at the center toward the pump rotor to reduce rotary clearance and permit the use of thinner and lighter weight flow directing plates. | ||||||
| 145 | High pressure gear pump or motor with axial retaining means in a housing cavity | US291286 | 1981-08-10 | US4370110A | 1983-01-25 | John L. Nagely |
| 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. The internal unit assembly further includes radial pressure balancing chambers which engage the wall of the cavity and which counterbalance the radial components of the pressure force at the discharge side of the housing tending to laterally shift the internal unit assembly toward the inlet side of the housing. At least one tension member holds the components of the internal unit assembly in assembled relation and resists part of the pressure force tending to separate the end plates from their predetermined positions. Retaining rings are releasably mounted in grooves in the wall of the housing cavity for axially locating the internal unit assembly in the housing and for transmitting to the housing other portions of the axial components of the pressure force tending to separate the end plates. Locking rings having tapered inner peripheral surfaces which engage chamfered surfaces on the thrust or end plates of the internal unit assembly also engage the wall of the housing cavity and transmit to the housing portions of the axial components of the pressure force tending to axially separate the end plates from their predetermined positions. | ||||||
| 146 | Gear motor with fluid pressure groove and recess to facilitate starting | US158152 | 1980-06-10 | US4368013A | 1983-01-11 | Graham J. Toogood |
| A rotary positive-displacement fluid-pressure motor which includes a casing, having an inlet port and an outlet port, at least two intermeshing rotors of toothed or lobed form housed for rotation in the casing, and means for conducting pressure fluid derived from the inlet port as far as a predetermined position in a face adjacent, and engaged by, a side of one of the rotors. A recess is so disposed in that face intermediate the predetermined position and the outlet port that, for facilitating starting of the motor when fluid under high pressure is directed into the inlet port, some of that fluid can gain access to the recess by way of said means and whichever intertooth or interlobe space of that rotor is so positioned as to place the means and the recess in communication. | ||||||
| 147 | High pressure gear pump or motor with axial retaining means and radial balancing means | US291285 | 1981-08-10 | US4358258A | 1982-11-09 | John L. Nagely |
| 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. The internal unit assembly further includes radial pressure balancing chambers which engage the wall of the cavity and which counterbalance the radial components of the pressure force at the discharge side of the housing tending to laterally shift the internal unit assembly toward the inlet side of the housing. At least one tension member holds the components of the internal unit assembly in assembled relation and resists part of the pressure force tending to separate the end plates from their predetermined positions. Retaining rings are releasably mounted in grooves in the wall of the housing cavity for axially locating the internal unit assembly in the housing and for transmitting to the housing other portions of the axial components of the pressure force tending to separate the end plates. Locking rings having tapered inner peripheral surfaces which engage chamfered surfaces on the thrust or end plates of the internal unit assembly also engage the wall of the housing cavity and transmit to the housing portions of the axial components of the pressure force tending to axially separate the end plates from their predetermined positions. | ||||||
| 148 | Scrool-type fluid machine with liquid-filled force-balanced pockets | US138730 | 1980-04-09 | US4350479A | 1982-09-21 | Kenji Tojo; Masato Ikegawa; Masao Shiibayashi; Masaya Imai |
| 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. | ||||||
| 149 | Pump and motor assembly for use in regulating a flow of fuel from a source of fuel to an operating chamber of an engine of a vehicle | US748061 | 1976-12-06 | US4207033A | 1980-06-10 | Gilbert H. Drutchas; Cass, Richard; David J. Suttkus |
| An improved pump and motor assembly is utilized to regulate a flow of fuel to an internal combustion engine. All of the fluid connections to the pump are connected with one end of the assembly. The pump and motor are both enclosed within a one-piece casing having a tubular side wall which is integrally formed with an end wall. The end section to which all of the fluid connections for the pump are made, is connected across the open end of the tubular side wall. To provide for the removal of vapor bubbles from the fuel, fuel supplied under pressure from the tank flows through an inlet cavity which circumscribes the pump and has an axial extent which is equal to the length of the pump. In addition, a screen at the inlet of the pump itself blocks the flow of vapor bubbles from the inlet cavity to the pump. The forces applied against opposite sides of the moving components of the pump by the inlet fluid are substantially balanced. Fluid pressure pulses in fuel discharged from the pump are dampened in an outlet cavity by a seal member which sealingly engages an outer cheek plate of the pump to separate the inlet and outlet cavities. A single spring element is utilized to perform the dual functions of pressing the seal member into engagement with the outer cheek plate of the pump and to press the outer cheek plate and cam ring against the inner cheek plate. | ||||||
| 150 | Hydraulic rotary screw machine with axial balancing piston | US788968 | 1977-04-19 | US4131400A | 1978-12-26 | Lars Segerstrom |
| A hydraulic screw machine having a housing employing a screw assembly with a drive screw and cooperating idler screws. The drive screw is sealably connected to a shaft extending beyond the housing on the high pressure side and has associated therewith a balance piston for acting on the screw drive. The drive screw is journalled to the shaft via bearings in the form of a self-adjusting plate surrounding the shaft. The plate is disposed between abutment surfaces connected to the housing for limiting its axial movement. A leakage channel between the piston and the housing is connected to the high pressure side of the machine and is determined by the balance piston. | ||||||
| 151 | Flow diverter pressure plate | US729782 | 1976-10-05 | US4087216A | 1978-05-02 | Donald L. Shumate |
| Method and apparatus are disclosed for counterbalancing the high pressure forces normally generated in the high pressure fluid region of a rotary pump or motor and exerted against the rotating structure of the pump or motor. By this method and apparatus a portion of the fluid in the high pressure region of the pump housing is transported to a region of the housing interior adjacent to, but out of communication with the low pressure fluid region. This transported high pressure fluid is directed against the rotating structure in the direction of the high pressure fluid region. Consequently, the rotating structure of the pump or motor is less subject to distortion or displacement due to forces generated by fluid in the housing's high pressure fluid region. | ||||||
| 152 | Fluidpressure communication passages in a multiple radialchamber fluidhandling device | US3683751D | 1969-12-29 | US3683751A | 1972-08-15 | EICKMANN KARL |
| The stator of a fluidhandling device has inner control faces forming clearances with end faces of a rotor. The fluid pressures in clearances at opposite ends of the rotor, which has two axially spaced groups of angularly spaced working chambers for radial pistons, are equalized by communication passages connecting each working chamber near one clearance with the respective other clearance.
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| 153 | Hydrostatic bearing | US3671155D | 1970-04-13 | US3671155A | 1972-06-20 | DUBINSKY TERENCE N |
| THE PRESENT DISCLOSURE RELATES TO AN APPARATUS FOR SUPPORTING A ROTATING ELEMENT RELATIVE TO A HOUSING OF A FLUID TRANSLATING DEVICE BY PRIMARY AND SECONDARY BEARING MEANS. THE SECONDARY BEARING MEANS INCLUDES FIRST AND SECOND SLEEVES SURROUNDING THE ROTOR SUPPORTING SHAFT WITH EACH OF THE SLEEVES HAVING A PLURALITY OF OUTER RECESSES COOPERATING WITH THE HOUSING TO PRODUCE POCKETS OR CHAMBERS AND A PLURALITY OF INNER RECESSES COOPERATING WITH THE SHAFT TO PRODUCE INNER POCKETS OR CHAMBERS. EACH OUTER POCKET RECEIVES DIVERTED PRESSURED FLUID FROM THE OUTER POCKET RECEIVES DIVERTED PRESSURED FLUID FROM THE PORT WHICH IS IN OPPOSED RELATIONSHIP ON THE ROTOR OR POCKET TO DIRECT THIS FLUID INTO THE AREA BETWEEN THE SHAFT AND THE BEARING SLEEVE. THE INTERNAL SURFACE OF THE SLEEVE HAS TWO OPPOSED CIRCULAR SEGMENTS HAVING EQUAL RADII WITH THE CENTERS OF THE SEGMENTS SPACED FROM EACH OTHER WITH THE RADII BEING SUBSTANTIALLY EQUAL TO THE DIAMETER OF THE SHAFT. THE INNER POCKETS ARE DIVIDED INTO FIRST AND SECOND AXIALLY SPACED PORTIONS SO THAT ANY AXIAL MISALIGNMENT BETWEEN THE SLEEVES AND THE BEARING WILL INCREASE THE FLOW PATH BETWEEN THE BEARING AND THE SHAFT ALONG ONE EDGE OF THE SLEEVE AND DECREASE THE FLOW PATH ALONG THE OPPOSITE EDGE TO PRODUCE A PRESSURE DIFFERENTIAL THEREBY AUTOMATICALLY ALIGNING THE SLEEVE AND SHAFT.
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| 154 | Vane-type rotary fluid-displacing machine | US3642390D | 1969-09-08 | US3642390A | 1972-02-15 | OSTBERG BERNHARD NILS |
| A fluid-displacing machine has a rotor member and a stator member relatively rotatable about a common axis. One of the members has an internal peripheral profile that is sinuous, opposed to which the other of the members has a peripheral profile that is circular. The contour of the sinuous profile generates an odd number of evenly spaced chambers interposed by cam surfaces and is developed so that the diametral distance between its opposite profile surfaces is constant. At least one diametrally disposed vane is slidably mounted in the circular member and adapted to continuously contact and sweep the sinuous profile surface of the other member, there being inlet and discharge passages leading into and out of each chamber respectively whereby upon relative rotation of the members pumping and/or compressing action is promoted. Subordinately, novel sealing means between the vane and the sinuous profile, and pressure-assisted sealing and automatic wear takeup means for the relatively moving lateral surfaces of the machine, are provided. Disclosed also is a mathematical formula for developing the contour of the sinuous profile.
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| 155 | Hydrostatic bearing system | US3598455D | 1969-06-27 | US3598455A | 1971-08-10 | SCHMITZ ALBERT A |
| A hydrostatic balancing and lubrication system for birotational pumps and motors which utilizes check valves in the passages supplying hydrostatic bearing ares with metered amounts of pressurized fluid. The check valves prevent the backflow of fluid from the bearing areas to that one of alternate sources of fluid having the lower pressure.
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| 156 | Hydraulic pump or motor | US3551081D | 1969-01-10 | US3551081A | 1970-12-29 | BRUNDAGE ROBERT WESLEY |
| 157 | Loading compensated commutating valve for fluid motors and pumps | US3473438D | 1967-08-07 | US3473438A | 1969-10-21 | HANSEN GUNNAR LYSHOJ |
| 158 | Pump | US3422749D | 1967-06-19 | US3422749A | 1969-01-21 | LUTZ OTTO |
| 159 | Motor or pump operating machine | US54134466 | 1966-04-08 | US3416458A | 1968-12-17 | JOSEF KOPFLI |
| 160 | Pump | US31531563 | 1963-10-10 | US3233552A | 1966-02-08 | KINNAVY ROGER J |
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