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7553134 |
Switch valve structure of fluid machine
A switch valve structure of a fluid machine ( 10 ) having a pump mode to operate as a compressor and a motor mode to operate as an expander is disclosed. In pump mode, a communication path ( 106 )...
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7399167 |
Fluid machine operable in both pump mode and motor mode and waste heat recovering system having the same
A check valve is provided to each discharge port, which communicates between a corresponding working chamber and a high pressure chamber in an integrated compressor/expander apparatus. A valve...
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6863504 |
Fluid pump relief valve
A pump head for a fluid pump driven by a motor includes an inlet for receiving fluid at a first pressure and an outlet for outputting fluid at a second pressure greater than the first pressure. A...
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6672845 |
Apparatus for preventing vacuum compression of scroll compressor
An apparatus for preventing vacuum compression of a scroll compressor comprising: a suction tube and a discharge tube each combined to one side of a closed container filled with oil to an adequate...
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6171071 |
Water pump having water cooling device
A water pump includes a housing having a water inlet, a water outlet, an exit and a mouth. A circulating water passage couples the exit to the mouth of the housing. A pump may pump water from the...
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6059547 |
Cylinder injection high-pressure fuel pump
A cylinder injection high-pressure fuel pump permits reduction in size and cost thereof and it is also capable of securely absorbing high-frequency pulsations. The cylinder injection high-pressure...
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5984645 |
Compressor with combined pressure sensor and high pressure relief valve assembly
A combined compressor pressure sensor and excess pressure relief valve (12) uses a formed disk (22) that snaps down and back up at a pair of predetermined pressures. The disk (22), when it snaps...
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5919033 |
Pump having relief valve seat free of direct structural restraint
A pump includes a coaxially integrated pump bypass/relief valve element of high density polymer material seats against a hard metallic sleeve that is pressed into a first counterbore around the...
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5846060 |
Reciprocating piston pump with bleed passages
A pump which has a piston (30) which is reciprocatingly moved vertically inside a tubular housing (32) to extract fluid from the bottom of a well (29). The piston (30) is attached to a motor (12)...
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5800136 |
Pump with bypass valve
A pump includes a housing having at least a first pumping chamber, an inlet, an inlet passage leading from the inlet to the pumping chamber, an outlet and an outlet passage leading from the pumping...
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5651665 |
Adjustable relief valve arrangement for a motor vehicle power steering hydraulic pump system
A hydraulic pump having a flow control valve for recirculating a fraction of the discharge of a rotating group of the pump and an externally adjustable pressure relief valve. The flow control valve...
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5571000 |
Booster pump with bypass valve integrally formed in gasket
A pump comprising a housing including first and second housing sections and a gasket between the first and second housing sections. The housing has a first pumping chamber, an inlet, an inlet...
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5570999 |
Electromagnetic pump having an automatic exhaust-control valve
Disclosed is an electromagnetic pump, in which oil is exhausted not intermittently but constantly with small pressure fluctuations, with reduced operational noise, with reduced fire-extinction...
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5462413 |
Disposable relief valve seat for positive displacement pump
A positive displacement pump includes a relief valve comprising an valve seat, a needle within the valve seat, a spring forcing the needle within the valve seat, a set screw pressing the spring...
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5421702 |
Lubricant pump for a turbine
A lubricant pump (24) for supplying pressurized lubricant to the main bearings (14) of a drive shaft (12) for a steam turbine (10) as shown in FIG. 1. A lubricant pump (24) is positioned between a...
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5407329 |
Pressure regulator for fuel injection devices
The pressure regulator is suitable for disposition in a fuel pump. The pressure regulator has a metal bellows, which is connected on one end to a retaining ring and on the other end to a disk. An...
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5378116 |
Over-pressure relief means
Inlet valves, in a fluid-pressuring cylinder, are biasingly held in given operative positions where they occlude passageways, formed in the cylinder, which open at opposite ends onto the cylinder...
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5059099 |
Integral pump housing
An integral cylinder liner and pump housing formed of a die cast aluminum workpiece of the type having a surface hardness extending a minimum depth into the workpiece, the housing further includng...
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5017099 |
Fluid regulator valve
An energy saving vacuum/pressure regulator is installed between a pump and a load for the pump, such as a storage tank, and relieves the load on the pump when the fluid in the load has reached a...
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4971527 |
Regulator valve for an ink marking system
A unitary pump, regulator valve/pulsation dampener, and interconnecting passageways is provided. The regulator valve/pulsation dampener includes a flexible member disposed in a chamber arranged...
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4905477 |
Refrigerant circuit with passageway control mechanism
A refrigerant circuit with a passageway control mechanism is disclosed which includes a compressor, a condenser and an evaporator connected to each other in series. The passageway control mechanism...
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4860856 |
Oil pressure adjustment device for engines
In an engine lubrication an external bypass mechanism for venting pressurized liquid around the lubricated areas, whereby the high side pressure is maintained within a desired range. The bypass...
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4834623 |
Electric fuel pump
The pump comprises a casing in which is disposed a stator armature of an electric motor, a rotatable shaft to which is fixed a rotor winding and which is torsionally connected to an impeller rotor...
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4722672 |
Hydraulic energy-conversion device
A device capable of functioning as a fluid pump or motor has a related hydraulic circuit controlling the relationship of the case pressure to the pressure in high-pressure port. The arrangement...
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4472112 |
Pressure control arrangements for an air compression system
This disclosure relates to a pressure control arrangement for an air compressor. The pressure control arrangement includes an auxiliary pressure chamber which is vented to the atmosphere by the...
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4408967 |
Piston cylinder and head for compressors
A piston cylinder and head arrangement for compressors including a valve plate disposed between a piston housing and the head. An intake valve, a discharge valve, and an atmospheric vent valve are...
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4407640 |
Reciprocating pump having unique pressure control valve construction
A reciprocating pump, in which a pressure control valve has a pressure-receiving face and is supported to a valve seat bearing at least one of suction and discharge valves, the pressure-receiving...
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4255094 |
Automatic pressure holding electromagnetic pump
An electromagnetic pump having a pressure adjusting function that holds discharge pressure constant; a decompression valve for throttling an outflow is provided in the path of the discharge side...
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4251192 |
Rotary pump with symmetrical by-pass and rotor with resiliently mounted vanes
A rotary pump for pumping liquids is provided. The pump is compact with a bypass system built into the pump housing. The pump is symmetrical about a center line so it can pump liquids in opposite...
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4246924 |
Valve arrangement
A valve arrangement is disclosed for controlling the supply of an operating fluid, having a casing with an inlet port, a main flow path provided with a non-return valve extending from the inlet...
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4201522 |
Boost-retarding device for electromagnetic plunger pump and the like
A pump has a boost-retarding device which comprises a cylinder communicating between the suction side and the discharge side of the pump. A plunger slidably and reciprocatingly fits into the...
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4171708 |
Bypass and unloader valve
A bypass and unloader valve capable of operation as a full unloader valve or volume control for fluid pressure systems. The structure utilizes a valve body having an inlet, an outlet, and a bypass,...
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4169695 |
Electromagnetic pump with pressure-regulating mechanism
An electromagnetic pump is disclosed in which a pair of check valves and a pressure-regulating mechanism are inserted in series in a fluid passage extending from a suction inlet to a discharge...
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4140436 |
Pressure control device for fluid systems
A device is provided for monitoring and controlling the above-ambient pressure in a system by comparing a net pressure force, produced by the system pressure on a pair of diaphragms having unequal...
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4035107 |
Pump system for high pressure abrasive liquids
The present invention relates to constant stroke reciprocating piston pump with mechanically driven diaphragm coupler, including combination of adjustable pressure control means and priming valve...
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4022381 |
Airless spray apparatus
A fluid spraying apparatus, such as for use in paint spraying and the like, including a high pressure diaphragm pump, a safety and pressure adjustment valve system, and a high pressure safety spray...
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3975116 |
Pressure responsive fluid valve assembly
A fluid valve assembly suitable for a number of different uses, including use as a fluid pressure regulator for a pump whose output pressure is to be kept uniform for changing load conditions. The...
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3936237 |
Membrane-air pump adapted to function as a tachometer
A membrane-air pump functioning as a tachometer, having a first flow circuit whose pneumatic flow or pressure values serve as speed-dependent guide parameters for control or regulating apparatus. A...
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3877841 |
Electromagnetic plunger pump
An electromagnetic plunger pump which is capable of continuously controlling the discharge pressure at a predetermined level by effectively dealing with such factors as the heating of the...
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3834413 |
UNIVERSAL HIGH PRESSURE REGULATOR
A universal high pressure air regulator which functions as a two stage constant running unloader and regulator when used in conjunction with a check valve, an excess air release and regulator where...
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3811792 |
AUTOMATIC PRESSURE CONTROL SYSTEM FOR PUMPS
The discharge pressure of a positive displacement pump is increased from a low regulated value to a higher value in response to outflow through a valve-controlled delivery conduit, by flow...
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3752601 |
HIGH PRESSURE LIQUID PUMP
A liquid pump adapted especially for use in a power steering system in an automotive vehicle comprising a pump rotor mounted for rotation within a cam ring, port plates and upper and lower seal...
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3715174 |
DIAPHRAGM PUMP
A diaphragm pump including a variable area relief valve for the working fluid which permits the pump to operate at reduced pressure when a peak load is reached during standby operation to reduce...
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3674043 |
METHOD OF PREVENTING VAPOR LOCK DURING ENGINE OPERATION AND OF FUEL LEAKAGE TO CARBURETOR AFTER ENGINE STOPPAGE
Vapor lock which might otherwise occur in its fuel supply pump during high temperature operation of a liquid-fuel engine, is minimized or eliminated by continuously withdrawing a small fraction of...
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3656870 |
PUMP
A pump is provided for supplying fluid under pressure to power steering apparatus of a vehicle, the pump equipped with a control device for regulating the flow rate and the pressure of delivery...
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3625638 |
TIMING AND OUTPUT CONTROL DEVICE FOR FUEL INJECTION PUMPS
In a fuel injection pump, the delivery of additional fuel quantities required for the starting operation is cut off and the timing of the injection is regulated by the r.p.m.-dependent pressure...
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3586039 |
DIESEL FUEL PUMP REGULATOR AND R.P.M. CONTROL
In a fuel regulator and r.p.m. control for a Cummings diesel engine P.T. fuel pump which has a fuel flow and pressure controlled regulator which normally limits the maximum flow of regulated fuel...
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3490481 |
TEMPERATURE COMPENSATED PRESSURE REGULATOR
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3368334 |
Air filter and air pressure regulating unit
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3363568 |
Liquid fuel pumping apparatus
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