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7575016 |
Pipe disconnector with increased sealing power
A system disconnector for disconnecting an upstream liquid system providing an inlet pressure from a downstream liquid system by a release valve ( 34 ) in response to a pressure drop between the...
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7059340 |
Valve assembly for pipe disconnectors
The invention relates to a valve assembly of a pipe disconnector for separating a service water system which is arranged to be filled or re-filled from a drinking water system, comprising upstream...
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7000387 |
Hydraulic spool valve for use in a hydraulic vehicle drive
A hydraulic spool valve is provided in which two inlet bores and an outlet bore lead into a housing. A spool-valve piston which is under the influence of compression springs on both sides can be...
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6857444 |
Flow-actuated trapped-pressure unloader valve
The invention recites an unloader valve operable to direct a flow of fluid. The valve includes a housing having a bypass opening, an inlet opening, an outlet opening and an internal chamber between...
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6769880 |
Pressure blowdown system for oil injected rotary screw air compressor
A pressure blowdown system for an oil-injected rotary screw air compressor having an output conduit mounted to a high pressure side of the compressor and having a feedback conduit mounted to an...
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6698446 |
Check valve
A check valve with an elongated body and a hole extending from an inlet end to an outlet end. A piston assembly is mounted within the body and can include a piston, a check valve seal and a piston...
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6575189 |
Automatic valve
An automatic valve includes a housing having an inlet passage and a passage to outlet, a linearly movable shaft disposed in the housing having two stops separated by a predetermined distance, a...
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6295811 |
Valve device for a hydraulic motor adapted to drive a high inertia mass
This invention relates to a valve device for at least one hydraulic motor adapted to drive a high inertia mass. The device comprises two principal conduits, respectively intended to be connected to...
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6178998 |
Reverse flow prevention apparatus
A reverse flow prevention apparatus is provided so as to drastically decrease pressure loss without installing an independent pressure regulator mechanism therein. With the reverse flow prevention...
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6173730 |
Charging and bleed value
A valve (60) for use in a brake system (10) through which a source (32) of fluid charges an accumulator (24) to a desired fluid pressure level and through which fluid pressure present in a conduit...
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5997693 |
Stock liquor pressure pulsation absorbing apparatus and method
A stock liquor pressure pulsation absorbing apparatus of an active type is able to absorb pressure pulsations in an ordinarily demanded frequency range of 0.01 to 100 Hz. A by-pass pipe (2)...
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5950658 |
Fluid flow deverter unit
A fluid flow diverting unit, the combination comprising a body having a hollow interior, and three generally tubular legs defining bores communicating with the interior; a first leg having a fluid...
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5765291 |
Compressed-gas system with a gas drier
A compressed gas system comprises a pressure generator and a consuming installation, a gas drier disposed between the pressure generator and the consuming installation, and an in-flow line...
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5718255 |
Flow-responsive diverting valve
A flow-responsive diverting valve is particularly useful with pressure washers of the type having a water pump coupled to an internal combustion engine equipped with a pull-rope starter. The valve...
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5681151 |
Motor driven air compressor having a combined vent valve and check valve assembly
An air compressor driven by a permanent split capacitor electric motor of the type having substantially the same value capacitance for starting as for operating and which has insufficient starting...
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5546975 |
Control device for a fluid passing through a bypass and system equipped with such a device to regulate the supercharging air of an internal combustion engine
A device for controlling the circulation of a fluid through a fluid bypass (3) consists of an actuator (14) which is actuated pneumatically and directly by the fluid located in the bypass so as to...
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5513958 |
Accumulator charging valve
An accumulator charging valve has a first valve spool determining a cut-in pressure level at which fluid from a pump is directed to an accumulator and a second valve spool determining the cut-out...
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5487403 |
Variable discharge pump with low unload to secondary
A load sensed variable output gear pump system including a pump within a housing, an inlet passage extending to a pump inlet and an outlet passage extending from a pump outlet. A secondary outlet...
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5485864 |
Pressure compensation valve
A pressure compensation valve is capable of distributing of an output pressurized fluid of single pressurized fluid supply source to a plurality of hydraulic loads. The pressure compensation valve...
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5433237 |
Dedrooped bypass valve
A differential pressure regulator connected in a fluid system including a bypass line and including a valve body with a high pressure inlet and a compensation inlet connected to the high pressure...
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5419365 |
Pressure regulator for water blasting
A regulator for a high pressure water blast system includes a body which houses a replaceable valve cartridge that includes a tubular seat member and an axially slidable valve element. The valve...
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5372157 |
Automatic bypass valve
A valve body has three openings: an inlet, an outlet and a flow-back opening, and is provided with an obturator of the flow-back opening and an obturator of the outlet, which outlet obturator is...
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5289843 |
Hydraulic safety valve
A hydraulic safety valve adapted to cut or divert the flow of pressurized fluid A hydrau/sudden rupture occurs in the hydraulic system. The valve has a valve body with an inlet port, first and...
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5279319 |
Water pressure relief method and system for water heaters
A system for alleviating leakage or weepage from a pressure relief valve found on conventional hot water heater tanks due to water pressure build-up in residential water lines caused by the...
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4953582 |
Combined pressure regulator and relief valve having a single biasing means
A pressure regulator and relief valve including a valve body, a first regulating valve moveable between first and second positions in response to a predetermined gallery pressure for regulating the...
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4941502 |
Low pressure recirculation valve
A low pressure recirculation valve for cooling a centrifugal pump. The invention comprises a unitary valve casing divided into a first valve chamber and a second valve chamber, the casing having a...
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4897996 |
Low-loss cyclically-operating pressure-responsive bypass valve for fixed displacement pump flow control
In a system for varying the output flow from a constant rate feed pump with low losses by chopping the said output flow into one flow fraction supplied to the load as a power flow and into another...
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4635671 |
Flow and pressure control valve system
A flow and pressure control valve system is provided in which a control valve body 18 has a bore 22 therein with a slidable piston 24, the piston being biased to the left by spring 32 to a stop 38,...
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4629156 |
Pressure relief and shut-off valve
A combination valve for relieving excess pressure while also stopping downstream gas flow. A pull-type valve core is mounted within the gas flow passage of a valve body. It includes an actuating...
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4623301 |
Overflow check system
An overflow check system 10 blocks overflow from a vapor powered, liquid pressure amplifier 11 except when required during start-up. Amplified output pressure derived from amplifier 11 enables a...
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4616672 |
Pressure relief and drain valve
A pressure relief and drain valve includes a poppet valve on a valve body movable in a primary valve chamber between closed and open positions and spring biased to the closed position. A secondary...
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4587988 |
Hydraulic pressure-relief valve
A pressure-relief valve has a housing forming a chamber extending along an axis and a valve seat centered on the axis and subdividing the chamber into an outer high-pressure compartment and an...
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4552168 |
Stabilizer for priority flow divider valve
The present invention is a stabilizer for steering priority flow divider valves. The present invention prevents the variable displacement pump of the steering hydraulic system from destroking to...
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4543976 |
Control valves for vehicle hydraulic systems
A control valve assembly incorporates a piston and a flow control valve which are both biassed in the same direction against pressure in an hydraulic accumulator by first and second respective...
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4503876 |
Control valve for vehicle hydraulic systems
A control valve assembly incorporates a flow control valve, and a piston which are both biassed in the same direction against pressure in an hydraulic accumulator by first and second respective...
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4498494 |
Air control for a lumbar support device
An air controlled valve assembly for a lumbar support device of the type having a plurality of parallel, horizontally disposed air bags located in the seat back of an automobile seat includes a...
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4470428 |
Unloader and check valve
A combined unloading valve and check valve (10) for use with a motor driven air compressor. The unloading valve (16) includes a spool (30) axially movable within a tubular body (12). In the...
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4470464 |
Valve means
A valve means to be installed in a string of drill pipe above a bottom hole positive displacement motor comprises a hollow housing (1) having an inlet and an outlet for the passage of a drilling...
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4434110 |
Carburetor, control apparatus and method for internal combustion engines
A carburetor and associated control apparatus for an internal combustion engine. The carburetor includes a carburetor head having a fuel inlet conduit and an air inlet conduit communicating with a...
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4428393 |
Quick vent response valve
A quick vent response valve (12) is fluidically series connected between a vacuum regulator valve (14) and an exhaust gas recirculation valve (16) which comprises a fluid pressure control system...
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4418709 |
Unloading valve for hi-lo-hydraulic system
An unloading valve for satisfying the requirements of a hydraulic system while minimizing transient pressure fluctuations. When the hydraulic system requires full fluid flow, fluid under pressure...
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4388047 |
Solenoid-operated pump
A solenoid-operated pump for discharging fluid from a tank through a fluid discharge passage in a pump body has a directional control valve disposed in the fluid discharge passage. The directional...
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4370102 |
Fluid pumping device
A device for pumping fluid includes a main pump device and an auxiliary device integrally fixed thereto. The auxiliary device can function as a damper, cut-off valve, check valve and relief valve....
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4321940 |
Unloader/check valve
An unloader/check valve for use with an air compressor comprising a one-piece valve body, a valve member slidable in the body between open and closed positions, biased toward its closed position,...
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4317471 |
Attachments for flexible or rigid tubing
An attachment for flexible or rigid tubing including a male connector for extending into frictional engagement with either flexible or rigid tubing. The male connector includes a sealing member and...
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4316504 |
Check/relief valve for an inflatable packer system
A check/relief valve intended for use in an inflatable packer system. The valve comprises a hollow cylindrical longitudinally extending inner member surrounded by a spring loaded relief piston and...
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4302937 |
Pressure limiter-regulator
A pressure limiter-regulator for a hydraulic control circuit. In a single body, a single spring acts both on a central spindle, which provides the pressure regulating function, and on a ball which...
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4285198 |
Accumulator charging valve
The charging valve comprises a pressure port connected with a pressurized fluid source, a first user port which is connectible to a first user component, a second user port which is connectible to...
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4282757 |
Device for detecting rate of change in pressure
Apparatus for detecting a rate of pressure rise in a pipeline higher than an acceptable level, comprising a monitor conduit which is connected between the pipeline and a monitor chamber of uniform...
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4270562 |
Fluid sequence bypass apparatus
PCT No. PCT/US79/00799 Sec. 371 Date Sept. 28, 1979 Sec. 102(e) Date Sept. 28, 1979 PCT Filed Sept. 28, 1979 PCT Pub No. WO81/00881 PCT Pub. Date Apr. 2, 1981 In some piston engines a pressurized...
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