| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 121 | ELECTRIC PUMP | US11934279 | 2007-11-02 | US20080107552A1 | 2008-05-08 | Toshiro Fujii |
| A driving timing gear is located between an electric motor and a driving rotor with respect to an axial direction of a driving shaft. A first bearing is located on the same side of the driving rotor as the driving timing gear. The driving shaft has a rotor attaching end. The rotor attaching end is a free end that is located on the same side of the first bearing as the driving rotor. A weight is at a portion of the driving rotor that is close to the driving timing gear with respect to the axial direction of the driving shaft. Another weight is located at a portion of a driven rotor that is closer to a driven timing gear. | ||||||
| 122 | Fuel pump | US11261891 | 2005-10-28 | US20070098586A1 | 2007-05-03 | John Clark |
| A spur-gear type fuel pump for vehicles is disclosed having a pair of interengaged gears contacting an interior surface of a pump body cavity for capturing fuel between teeth of the gears and the interior surface. The gears have a concentrically ground face that is flush against and slides over the interior surface to generally prevent or restrict fuel bleed or leakage across the interface and from between the teeth of the gears. | ||||||
| 123 | Gear pump | US11263358 | 2005-10-31 | US20060120856A1 | 2006-06-08 | 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. | ||||||
| 124 | Trochoid pump | US11189830 | 2005-07-27 | US20060029509A1 | 2006-02-09 | Masakazu Kurata; Takumi Hisazumi; Yasuhito Nakakuki; Mitsuaki Nakada; Mizuo Otaki |
| A trochoid pump for supplying hydraulic fluid to a power cylinder in a power steering system. The trochoid pump includes a housing formed therein with an annular operating chamber. Outer rotor having internal teeth and inner rotor having external teeth are rotatably accommodated in the operating chamber in such a manner that the internal and external teeth are engageable with each other. A driving shaft is provided for rotationally driving the inner rotor. A low pressure passage is opened to a clearance between an outer peripheral surface of the outer rotor and an inner peripheral surface of the operating chamber within a discharge region at side of an engaging section at which the volume of the pump chamber is the minimum so as to release a high pressure applied to the outer peripheral surface of the outer rotor, to a low pressure side. | ||||||
| 125 | Overheat protection for fluid pump | US10286083 | 2002-11-01 | US06837688B2 | 2005-01-04 | Robert R. Kimberlin; Robert E. Harvey, III; Jie Jiang |
| An apparatus for detecting the presence of an overheat condition in a fluid pump includes a pump head for receiving a fluid at a first pressure and outputting the fluid at a second pressure that is greater than the first pressure. A motor is positioned adjacent the pump head to drive the pump head to pressurize the fluid. A single overheat sensor senses an overheat condition in the pump head and an overheat condition in the motor. When a threshold temperature is sensed by the overheat sensor, a switch is activated to prevent operation of the motor. In one embodiment, the overheat sensor and switch are integral and may, for example, take the form of a bi-metal switch formed in the stator windings of the motor. In alternate embodiments, the overheat sensor and switch are separate. | ||||||
| 126 | Rotor with a hydraulic overbalancing recess | US10443192 | 2003-05-23 | US06783340B2 | 2004-08-31 | Xingen Dong |
| A rotary fluid pressure device having a housing member, a manifold assembly, a gerotor set, a channeling plate and an end plate. The gerotor set having a stator member with at least one axial fluid path extending therethrough and a rotor member, disposed within said stator member, having an axial end surface with a recess, and a plurality of axially extending through holes for fluid flow therethrough adapted for hydraulically axially balancing its axial ends relative to the stator. The channeling plate having a first and second fluid passage extending therethrough, and a plurality of through holes. Means for routing the high pressure fluid from the housing member through the gerotor set, through the channeling plate first and second fluid passages, into and subsequently out of a cavity between the channeling plate and the end plate and into the rotor recess to overbalance the rotor towards the manifold assembly. | ||||||
| 127 | Hydraulic device with balanced rotor | US10426079 | 2003-04-29 | US06743003B2 | 2004-06-01 | Xingen Dong |
| A rotary fluid pressure device having a housing member, a manifold assembly, a gerotor set, an end plate, and a rotatably journaled torque transfer shaft interconnected with the gerotor set and extending within the housing member and manifold assembly. The gerotor set having an internally toothed stator member and a rotating rotor member disposed within the stator member. The rotor member having a first and second axial end surface and external teeth which interengage with the internal teeth of the stator to define a plurality of expanding and contracting volume chambers. The rotor member also having a first plurality of circumferentially spaced laterally directed fluid paths which extend through the rotor for fluid connection between the manifold assembly and the volume chambers, and a second plurality of circumferentially spaced, laterally directed fluid paths interposed between the first plurality of fluid paths for sequentially channeling fluid between both axial end surfaces. | ||||||
| 128 | Fluid circulation path for motor pump | US10290705 | 2002-11-08 | US20030161743A1 | 2003-08-28 | Robert R. Kimberlin; Robert E. Harvey, III; William M. Larson; William C. Rawnsley, JR. |
| A fluid pump includes a pump head having an inlet for receiving fluid at a first pressure and an outlet for outputting fluid at a second pressure greater than the first pressure. Pressurized fluid is directed through a first passage to the outlet without the pressurized fluid leaving the pump head prior to reaching the outlet. A second passage directs pressurized fluid to a fluid circulation path which is at least partially external to the pump head with the fluid circulation path terminating adjacent the outlet. Pressurized fluid passing through the first and second passages is directed to the outlet without being re-pressurized by the pump head. The first and second passages are in opposed relation to one another to provide balancing of thrust produced by the flow of pressurized fluid through the passages. An electric motor drives the pump head. The fluid circulation path may include portions of the electric motor. | ||||||
| 129 | Device for reducing the axial force load of a fluid supply pump | US09889892 | 2001-10-22 | US06537046B1 | 2003-03-25 | Stanislaw Bodzak |
| The invention relates to a device for delivering fuel from a tank to an internal combustion engine, wherein a pump chamber is embodied in the housing of the feed device. Rotary driven displacing elements are contained in the housing. The shaft supporting a displacing element is provided with bores which connect an end of the shaft to the suction side of the feed device. | ||||||
| 130 | Fluid metering device | US10144897 | 2002-05-13 | US20020166586A1 | 2002-11-14 | William D. Flavelle |
| A fluid metering device that preferably includes a substantially linear series of intermeshing gears. The fluid metering device includes an inlet port adjacent the intermeshing portion of each pair of gears within the series adjacent the point at which the pair of gears diverge. The device further includes an discharge port adjacent the intermeshing portion of each pair of gears within the series adjacent the point at which the pair of gears converge. The device is configured to convey liquid from a main inlet stream of liquid, through the inlet ports, and out the discharge ports at substantially equal rates. The device preferably includes a pressure balance inlet port and a pressure balance discharge port adjacent the exterior portion of each end gear within the series of gears for balancing forces exerted on the end gear by liquid passing through the various inlet and discharge ports. | ||||||
| 131 | Trochoid gear pump having means for canceling imbalance load | US10086847 | 2002-03-04 | US20020122736A1 | 2002-09-05 | Masatoshi Takagi |
| 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. | ||||||
| 132 | Pump equipment and method for assembling same | US10034111 | 2002-01-03 | US20020053829A1 | 2002-05-09 | Takashi Murayama; Takeshi Fuchida; Daizo Oba; Hiroyuki Shinkai; Toshiya Morikawa |
| In a pump equipment having one or more rotary pumps for hydraulic circuit, the intake port is communicated with the shaft hole for inserting the drive shaft and fluid flows through the shaft hole to a fluid groove provided in inner surfaces of the pump room for the purpose of lubrication. To prevent fluid leakage to outside, first and second oil seals are disposed for filling the clearance between the drive shaft and the shaft hole and, preferably, a communicating conduit is provided between the first and second oil seals to transmit the fluid leaked through the first oil seal to a low pressure fluid conduit of the hydraulic circuit. In particular, in the pump equipment having plural rotary pumps, the respective discharge ports of the rotary pumps are located at the points which are nearly symmetrical with respect to the center axis of the drive shaft to counterbalance each other the reaction forces against the drive shaft to be produced by the high pressure at the respective discharge ports. | ||||||
| 133 | Pump equipment and method for assembling same | US09295311 | 1999-04-21 | US06347843B1 | 2002-02-19 | Takashi Murayama; Takeshi Fuchida; Daizo Oba; Hiroyuki Shinkai; Toshiya Morikawa |
| In a pump equipment having one or more rotary pumps for a hydraulic circuit, the intake port is communicated with the shaft hole for inserting the drive shaft and fluid flows through the shaft hole to a fluid groove provided in inner surfaces of the pump room for the purpose of lubrication. To prevent fluid leakage to the outside, first and second oil seals are disposed for filling the clearance between the drive shaft and the shaft hole and, preferably, a communicating conduit is provided between the first and second oil seals to transmit the fluid leaked through the first oil seal to a low pressure fluid conduit of the hydraulic circuit. In particular, in the pump equipment having plural rotary pumps, the respective discharge ports of the rotary pumps are located at the points which are nearly symmetrical with respect to the center axis of the drive shaft to counterbalance each other, the reaction forces against the drive shaft to be produced by the high pressure at the respective discharge ports. | ||||||
| 134 | Pump equipment with plural rotary pumps and method for assembling same | US09886052 | 2001-06-22 | US20010048879A1 | 2001-12-06 | Takashi Murayama; Takeshi Fuchida; Daizo Oba |
| In a pump equipment having plural rotary pumps, the respective discharge ports of the rotary pumps are located at the points which are nearly symmetrical with respect to the center axis of the drive shaft to counterbalance each other the respective reaction forces against the drive shaft to be produced by the high pressure at the respective discharge ports. The respective discharge fluid conduits, in case of the first and second pumps, are located at the points which are opposite each other, more preferably, different at an angle of 180 degrees each other, with respect to the center axis of the drive shaft to limit the bending of the drive shaft. As a method for assembling the pump equipment, the peripheral border between respective cylindrical members piled up for constituting the casing is tentatively welded by laser beam at first and, then, all around the peripheral borders are finally welded. | ||||||
| 135 | Pump equipment with plural rotary pumps and method for assembling same | US09295312 | 1999-04-21 | US06264451B1 | 2001-07-24 | Takashi Murayama; Takeshi Fuchida; Daizo Oba |
| In a pump equipment having plural rotary pumps, the respective discharge ports of the rotary pumps are located at the points which are nearly symmetrical with respect to the center axis of the drive shaft to counterbalance each other the respective reaction forces against the drive shaft to be produced by the high pressure at the respective discharge ports. The respective discharge fluid conduits, in case of the first and second pumps, are located at the points which are opposite each other, more preferably, different at an angle of 180 degrees each other, with respect to the center axis of the drive shaft to limit the bending of the drive shaft. As a method for assembling the pump equipment, the peripheral border between respective cylindrical members piled up for constituting the casing is tentatively welded by laser beam at first and, then, all around the peripheral borders are finally welded. | ||||||
| 136 | Hydraulic vane pump with enhanced axial pressure balance and flow characteristics | US919910 | 1992-07-27 | US5266018A | 1993-11-30 | Albin Niemiec |
| A rotary hydraulic device that includes a housing with support plates mounted against rotation. A pair of pressure plates are mounted on the support plates and cooperate with a surrounding cam ring to form a rotor cavity. A rotor is disposed for rotation with the rotor cavity, and has vanes that radially engage the surrounding surface of the cam ring. A circumferentially continuous hydrostatic pressure pool is formed between each pressure plate and its adjacent support plate for balancing and/or slightly exceeding the forces in the pump cavities that tend to separate the pressure plates. An isolated area within each hydrostatic pressure pool intermittently communicates with the pumping chambers through timing passages in the rotor. Fluid flowing to this isolated area may be employed to form a supplemental hydrostatic pressure pool for enhanced axial balance on the pressure plates, and/or for directing discharged flow through multistaged orifices to precompress the fluid volume to be displaced. | ||||||
| 137 | Rotary gear transfer pump having pressure balancing lubrication, bearing and mounting means | US673948 | 1991-03-22 | US5197869A | 1993-03-30 | Milton N. Hansen; Steven D. McMahon |
| An externally driven rotor is rotatable within a pumping chamber and is located in meshing relationship with an internal idler gear. An annular bearing mounted within the housing in confronting relationship with a peripheral surface of the rotor, provides a bearing surface and supports radially directed loads exerted by unbalanced fluid force on the rotor. A pressure balancing circuit is provided for transferring pressurized fluid from a discharge region in the pump to a backside of the rotor to at least partially balance axial forces exerted on the rotor by pressurized fluid. To provide bi-rotational capability, a cross-communicating passage and check valves are used for controlling the flow of fluid into the pressure balancing circuit. A vented seal chamber is also provided which includes passages and check valves communicating with ports which are arranged such that when the seal chamber exceeds inlet pressure, the check valve associated with the port acting as an inlet opens to discharge fluid from the seal chamber. A replaceable foot bracket is provided so that the mounting height of the pump can be selected to coincide with a mounting height of a drive motor to which it is connected eliminating the need for shims or other adjustments. An alternate rotor is disclosed including trimmed regions for reducing viscous friction when pumping high viscus fluids. | ||||||
| 138 | High pressure hydraulic generator receiver for power transmission | US529738 | 1990-05-14 | US5028221A | 1991-07-02 | Jean Malfit |
| Hydraulic generator-receiver with needle bearings (123) on the driving gear (9) and providing for play compensation between the end plates (21, 22) and the envelope (36), a leak return and a better supply of the pressure zone (34). | ||||||
| 139 | Pressure balanced external gear pump or motor of floating shaft type | US179474 | 1988-04-08 | US4909714A | 1990-03-20 | Anqiang Cheng |
| An external gear pump and/or motor of floating-shaft type comprising a front cover, a back cover and a housing forming a cavity in which a pair of meshed gears are mounted, characterized in that the gear shafts are brought toward the high-pressure side by means of a sleeve which can float radially under the pressure of the hydraulic oil and meanwhile said sleeves are pushed against the ends of the gears under the pressure of the hydraulic oil so that radial floating is achieved without any additional floating means in an external gear pump and/or motor. Therefore, the size of high-pressure zone and thereby, the inherent radial force are reduced in the gear pump and/or motor according to the present invention. Furthermore, its structure is simplified and reliable and its production cost is reduced. | ||||||
| 140 | Gear-within-gear fuel pump and method of pressure balancing same | US101265 | 1987-09-25 | US4820138A | 1989-04-11 | Steven R. Bollinger |
| 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. A method of pressure balancing the forces on the internal gear is also disclosed. | ||||||
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