| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 101 | Hydraulic pump with speed dependent recirculation valve | US09489437 | 2000-01-21 | US06478549B1 | 2002-11-12 | David R. Aden; Thomas C Rytlewski; Jerod M. Etienne |
| This invention offers advantages and alternatives over the prior art by providing a dual port hydraulic fixed displacement pump which exhibits improved efficiency by limiting the volume of discharged fluid which is subjected to the line pressure of a hydraulic system through mechanical valve control. According to the present invention, a pair of discharge ports are provided, namely a first discharge port and a second discharge port. Under all operating conditions, e.g., low and high pump speed operating conditions, the fluid flowing within the first discharge port and primary discharge passageway is exposed to the working pressure of the primary line, which represents a high pressure line. The second discharge port fluidly communicates with a secondary discharge passageway which is in selective fluid communication with a low pressure line connected to a low pressure area of the pump (e.g., a reservoir) under first operating conditions and is also in selective communication with the first discharge port and the primary discharge passageway under second operating conditions. | ||||||
| 102 | Vane pump | US202573 | 1998-12-17 | US6152716A | 2000-11-28 | Ivo Agner |
| The invention relates to a vane pump with a rotor which receives vanes, with two pressure plates (17) which bear sealingly on the rotor and of which one is arranged on a delivery side of the vane pump and one on the opposite side, and with a contour ring surrounding the vanes and forming two suction and discharge regions, at least one of the two pressure plates being provided with inlet and outlet orifices (53, 59, 63a, b) which make a fluid connection between a discharge region and an undervane region. The invention is distinguished in that the pressure plate (17.2) located opposite the delivery side has an orifice, which makes a fluid connection between a discharge region and a pressure space (61) partially delimited by this pressure plate (17.2), and seals off the pressure space (61) relative to the other discharge region. | ||||||
| 103 | Safety device for avoiding entrapment at a water reservoir drain | US738222 | 1996-10-25 | US5690476A | 1997-11-25 | Bernard J. Miller |
| A safety device for avoiding entrapment at a water reservoir drain by using a vacuum operated switch to interrupt power to the reservoir pump whenever a blockage occurs. In addition, a manual reset switch requires human intervention to re-activate the reservoir pump once the blockage condition is removed. | ||||||
| 104 | Hydraulic brake pump with eccentric cam and reciprocating piston | US349547 | 1994-12-05 | US5465817A | 1995-11-14 | Ralph P. Muscatell |
| A hydraulic brake coupled to a rotary shaft including a hydraulic pump connected to the shaft, the pump having a pump inlet, and a pump outlet, a hydraulic loop having an inlet part connected to the pump outlet and an outlet part connected to the pump inlet, a flow control device positioned in the hydraulic loop between the inlet outlet parts for controlling flow of hydraulic fluid in the hydraulic loop, and a brake actuator connected to the flow control device for reducing the flow of hydraulic fluid in response to operation of the brake actuator. There is provided a hydraulic brake wherein the hydraulic pump includes a pump cylinder with a pump piston in the pump cylinder, a one way inlet valve in the pump cylinder fluidly communicating with the hydraulic loop outlet part, a one way outlet valve in the pump cylinder fluidly communicating with the hydraulic inlet part, reciprocating device in operative engagement with the pump piston for reciprocatingly moving the pump piston in the pump cylinder, the reciprocating device coupled to the rotary shaft. The hydraulic brake includes a camshaft, at least one cam on the cam shaft in operative engagement with the pump piston for driving the pump piston into the pump cylinder with each revolution of the camshaft, and hydraulic fluid bias pressure supply device for applying fluid bias pressure to the hydraulic fluid in fluid communication with the hydraulic loop outlet part. | ||||||
| 105 | Hydraulic motor | US102377 | 1993-08-05 | US5381723A | 1995-01-17 | Dan Nilsson; Ove Donnerdal |
| The invention relates to a hydraulic motor having a motor body comprising a first and a second part (71, 72) which are joined to each other in a parting plane (74). A motor chamber (2) with driving cogwheels (10, 11) is formed by borings (84, 85), which extend from the parting plane into a certain depth in at least one of the first and second parts (71, 72). A by-pass conduit (15) is provided between the inlet and outlet hydraulic conduits of the motor chamber. In the by-pass conduit there is provided a main valve (20) for closing and opening the by-pass conduit for starting and for stopping the hydraulic motor, respectively. The by-pass conduit is formed by portions (16, 17) of a first (100) and a second (101) connection between the parting plane (74) and the inlet conduit (5), and between the parting plane (74) and the outlet conduit (7), respectively, and by a cross link (18) between the first and second connections (100, 101). | ||||||
| 106 | Plunge valve | US105031 | 1993-08-11 | US5347812A | 1994-09-20 | Dan Nilsson; Ove Donnerdal |
| A plunge valve for closing and for opening a connection in a hydraulic conduit comprises a plunge (37) which is slidably movable in the hydraulic conduit (5, 5A) under the influence of the pressure in a section (5A) of the conduit on the inlet side of said conduit adjacent to the plunge between a first, open position, when the pressure in said section (5A) is high, in which position the plunge is withdrawn and communication is established, and a second, closed position, in which the pressure in said section is low, in which position the plunge shuts off said connection. | ||||||
| 107 | Osmotic water purification pumping system with flush valve | US998431 | 1992-12-30 | US5284424A | 1994-02-08 | Fredrik Dellby; Per A. Fonser; Peter H. Hagqvist |
| The invention relates to a pump arrangement, especially for the operation of an osmotic water purifier comprising a filter housing (10) having a raw water inlet (11), a filtrate outlet (15), a reject outlet (16), and a flush valve (18) adapted to be opened for flushing raw water through the filter housing. The pump arrangement comprises a high pressure pump (12) for supplying raw water at the required pressure, and a circulation pump (13) for recirculating a relatively large flow through the filter housing. The high pressure pump (12) consists of a sliding vane pump of the type in which the vanes (24) are caused to sealingly engage the surrounding wall of the pump chamber by a hycraulic pressure supplied from the pressure side of the high pressure pump. The inlet of the high pressure pump is connected to a pressurized water supply line, whereby, when the flush valve (18) is opened and said pressure ceases, said vanes are moved radially inwards and the high pressure pump is opened for allowing a through flow exceeding its normal capacity. | ||||||
| 108 | Constant output pressure pump | US912300 | 1992-07-13 | US5277558A | 1994-01-11 | Marshall Long |
| A conveyance pump having a substantially constant output pressure. The pump includes a chamber having a circular periphery. A vane is mounted within the pump chamber for oscillation through an arc and a valve chamber includes opening to each boundary of this arc, and with input and output conduits. Within the valve chamber is a valve which may move between two positions, allowing communication between alternate pairs of openings and conduits. An hydraulic motor is connected to the vane to cause its oscillation between the limit positions, and a motor rotates the valve between its positions. In operation the vane will rotate, drawing material from the input opening into the pump chamber behind the advancing vane, and pushing, and thus pressurizing, the material out of the pump chamber in front of the advancing vane and out of the output opening. Reversing the vane continues this process. If a product flow stoppage occurs downstream of the pump the output pressure on the vane will exceed the pressure generated by the hydraulic motor, thus causing the vane to automatically stop oscillation. When the downstream stoppage has been removed, the output pressure will begin to lower, and the vane will again automatically resume oscillation. | ||||||
| 109 | Rotary vane pump with valve to control vane biassing | US441036 | 1989-11-22 | US5026263A | 1991-06-25 | Hiroto Iwata |
| An oil pump of vane type is disclosed. Plates which hold a rotor and a cam ring therebetween have a groove formed in their suction region to allow a discharged oil to be introduced into such groove. The plates are also formed with a groove in their discharge region which communicates with the groove in the suction region through an orifice. The oil in these grooves act upon the back side of the vane to urge it into abutment against the cam ring. A passage is provided for connecting the groove in the discharge region to a low pressure side of the pump, and a valve opens or closes the passage to enable the pumping action to be turned on and off. | ||||||
| 110 | Lubricating device | US295799 | 1989-01-11 | US4938316A | 1990-07-03 | Minoru Ichikawa; Kotaro Kashiyama; Tomomitsu Furukawa |
| A lubricating device for intermittently supplying a lubricating fluid to a plurality of portions to be lubricated comprises a gear pump, a plunger pump, and an electronic control unit for controlling actuation and suspension of the gear pump. The plunger pump includes a flow passage connected to an outlet port of the gear pump, a selector valve unit connected to the flow passage, a piston unit connected to the selector valve unit and an outlet port connected to the piston unit. | ||||||
| 111 | Sewage system discharge pump module | US281700 | 1988-12-09 | US4867871A | 1989-09-19 | William C. Bowne |
| A waste water collection and discharge system includes a buried waste water collection container which receives solid and liquid waste through an inlet. A dry vault located outside the container has a closable entryway which permits access to the vault from above ground. A pump which fits in the vault has an inlet which receives waste water from a fluid inlet tube that extends into the collection container, and an outlet which passes waste water through a fluid outlet tube to a remote collection site. A level sensor senses the level of the waste water in the collection container and initiates and terminates operation of the pump to maintain the level within predetermined limits. The pump, motor, level sensor and motor control system are interconnected into a unitary module which can be placed into and removed from the vault from above. Quick release attachments are provided between the vault and the module, the pump inlet and the fluid inlet tube, the pump outlet and the fluid outlet tube, and in the sensor system and the electrical power line used to power the pump. All of these quick release attachments are accessible through the entryway in the vault, so that the pump/motor module cna quickly and easily be removed from and replaced back into the vault. | ||||||
| 112 | Hydraulic motor having free-wheeling and locking modes of operation | US697596 | 1985-02-01 | US4613292A | 1986-09-23 | Marvin L. Bernstrom; Steven J. Zumbusch |
| A rotary fluid pressure device is provided of the type in which a valve spool (47) is axially movable within a spool bore (35). In the normal operating position of the valve spool (47), torque output is transmitted from the gerotor gear set (17) by means of a main drive shaft 53 through one spline connection (51, 49) then through a second spline connection (49, 75) to the output device. The valve spool (47) may be moved axially to a position in which the second spline connection (49, 54) is disengaged, and the device operates in a free-wheel mode. The valve spool (47) may also be moved axially to a position in which a set of teeth (71) on the valve spool engage a set of teeth (69) on the stationary housing, such that the device operates in a locked mode. | ||||||
| 113 | Standby water-powered basement sump pump | US525121 | 1983-08-22 | US4552512A | 1985-11-12 | William Gallup; Detleff W. P. Schmidt |
| A water-powered positive displacement auxiliary sump pump has a drive water inlet connected to the municipal water supply via a float actuated pilot valve. The pump is designed to be constructed chiefly of molded plastic supported by an exit manifold connected to the discharge line of an existing electrical sump pump. The presently preferred design is a rotary sliding vane pump having drive water and pump water chambers. | ||||||
| 114 | Pump assembly and operating method | US422596 | 1982-09-24 | US4493616A | 1985-01-15 | Thomas F. Bergin |
| An improved pump assembly is used to supply fuel to an aircraft engine and includes a positive displacement pump which supplies fuel during low speed operation of the pump assembly and a centrifugal pump which supplies fuel during relatively high speed operation of the pump assembly. The positive displacement pump has a plurality of vanes connected with an impeller of the centrifugal pump. The vanes are forced radially inwardly against a stationary cam surface by fluid pressure. The fluid pressure is conducted from an outlet of the positive displacement pump through a passage in the impeller of the centrifugal pump to pressure chambers disposed at outer ends of the vanes. By providing the fluid pressure passage in the impeller of the centrifugal pump, the axial length of the pump assembly tends to be minimized. The positive displacement pump is rendered ineffective to pump fluid when the output pressure from the centrifugal pump equals the output pressure from the positive displacement pump. When the positive displacement pump is ineffective, the components of the positive displacement pump are lubricated by fluid which flows from the positive displacement pump to the centrifugal pump through a common drive shaft for the two pumps. | ||||||
| 115 | Liquid flow control apparatus | US254469 | 1981-04-15 | US4416592A | 1983-11-22 | Herbert E. Lindtveit |
| This liquid flow control apparatus is a delayed closure valve mechanism intended for use in an unloading bypass between the outlet and the inlet of a pump for supplying fuel to an oil burner. The valve mechanism includes a conduit having a large diameter section between two small diameter sections. A ball valve having a diameter smaller than the large diameter section and larger than the two small diameter sections is captured within the large diameter section. The large diameter section extends upwardly, so that the ball is biased by gravity to its inlet end. When the pump starts, the ball is moved by the discharge pressure of the pump until it engages the upper end of the large diameter section, whereupon the unloading bypass is closed and the discharge pressure of the pump is effective to open a cut-off valve leading to the nozzle of the oil burner. The length of the large diameter section determines the time delay between the starting of the pump and the delivery of oil to the nozzle of the burner. In a modification, two parallel paths are provided for the ball valve, a first long path through which the ball moves to establish the time delay, and a second shorter path through which the ball moves quickly to return to its inactive position. | ||||||
| 116 | Gear pump construction | US3716306D | 1971-03-31 | US3716306A | 1973-02-13 | MARTIN T; LONDAHL D |
| A motor-driven gear pump used to pump fluid from a reservoir to a dispensing spigot has a cylinder connected to the pump discharge having a spring biased piston. The piston rod has a knob engaging a normally open microswitch controlling the motor. When the motor is running and the pump delivering through the spigot, the piston is in intermediate position and the knob maintains the switch closed. When the spigot is closed, back pressure builds up in the cylinder, forcing the piston to overcome the spring and the knob to move out of contact with the switch, stopping the motor. If the reservoir is empty, the cylinder empties and the spring moves the piston so that the knob moves out of contact with the switch, again stopping the motor as a safety precaution. Check valves are installed in the inlet line and discharge line of the pump. A manually actuated button moves the piston against the force of the spring and thus primes the pump and also closes the switch to start the motor.
|
||||||
| 117 | Pumping system | US3711222D | 1971-01-11 | US3711222A | 1973-01-16 | HARTLEY E |
| A pumping system comprising a pump, a drive mechanism for driving the pump, and a differential pressure switch responsive to the pressure of the fluid in a sensing zone on a discharge side of the pump for turning the pump on and off. A restricted fluid passage is interposed between the pump discharge and the sensing zone.
|
||||||
| 118 | Fluid pump and delivery system | US3650643D | 1970-04-30 | US3650643A | 1972-03-21 | GRENNAN CHARLES W; HEARN RICHARD J |
| A fuel pump and delivery system for gas turbine engines is disclosed having a plurality of interrelated pumping circuits to meet the engine fuel requirements over the entire range of engine operation. The system has three distinct but interrelated circuits for (1) start up and low-speed operating requirements, (2) normal operating requirements above engine idle speed, and (3) high altitude cruise requirements. A positive displacement gear pump functions in the low speed and start up circuit to provide the necessary dry lift and high pressure, and after the start-up requirements have been met this part of the displacement gear pump is unloaded to terminate its pumping action, but the gear train is employed to drive selectively operative centrifugal pumps of different capacities suitable to meet the engine fuel requirements for either normal operations or for high altitude cruise.
|
||||||
| 119 | Equipment for delivering liquid, particularly oil burners | US3635604D | 1969-12-02 | US3635604A | 1972-01-18 | PETERSEN JORGEN HARTVIG; HANSEN GUNNAR LYSHOJ |
| The invention relates to an oil pump unit for oil burners which includes a known assembly of a geared pump, a sump at a lower level, and a pressure regulator valve. Air vent means are provided which includes apparatus for feeding back to the pump pressurized liquid from the pressure regulator. The pump proper has novel passage means for receiving the fed back pressurized liquid to the pumping chambers to effect a venting of pressurized air from the chambers.
|
||||||
| 120 | Retractable vane hydraulic motor-pump device | US3455247D | 1967-09-12 | US3455247A | 1969-07-15 | DANIELS DENNIS |
QQ群二维码
意见反馈
意见反馈