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8596993 Dual-pump supply system with bypass-controlled flow regulator  
A dual-supply fluid distribution system includes a first pump having an inlet and an outlet. The first pump is configured to supply a first fluid flow. A second pump has an inlet and an outlet,...
8439069 Air release valve  
A valve assembly is provided that is suitable for use as an air release valve. The valve mechanism is actuated by liquid forced through an orifice by a diaphragm under pressure from the main...
8408233 Flow control system and method for controlling two positive displacement pumps  
A fuel flow system for a gas turbine engine includes a first pump, a second pump, a bypass loop, an integrating bypass valve and a pilot valve. The first pump connects to an actuator and a...
7513269 Hydraulic control system for automatic transmission  
In a hydraulic control system for an automatic transmission, a valve element of an accumulator closes communication between a pressure switch circuit and a detection circuit when a hydraulic...
7204266 Pilot-operated pressure shut-off valve  
A pilot-operated pressure shut-off valve having a main control piston which, when an upper system limit pressure in the hydraulic system is reached, connects an inlet, via which pressure medium...
7178545 Modulating bypass control system and method  
A control system for a bypass duct includes a pneumatic damper control assembly, a sensor and a pneumatic switch. The damper control assembly includes a damper vane mountable in the bypass duct...
7017605 Valve assembly  
A valve assembly (112) includes a first member (120) having a cavity (136). A poppet (142) is located in the cavity (136) in the first member (120). The poppet (142) is axially movable relative to...
6820641 Internally piloted dome loaded regulator  
The internally piloted dome loaded pressure reducing regulator includes a regulator body with a main valve portion and a pilot valve portion. The inlet is fluidly connected to the main valve bore...
6601602 Pressure-control valve  
A pressure-control valve (1) comprises a first control piston (1), which is disposed between a first pressure chamber (6), which adjoins the first control piston (1) and is connected to at least...
6176251 Valve assembly in particular for a pressure washer  
A pressure washing machine has a valve assembly with an inlet opening and an outlet opening for a pressurized fluid, and a fluid interception element which is movable under the thrust of the fluid...
6170508 Fluid flow regulating valve and method  
A valve for regulating the rate of flow and/or the pressure of oil flowing to a transmission or another consumer in the power train of a motor vehicle has a piston which defines with the valve...
6095177 Precontrolled 3-way pressure control valve  
PCT No. PCT/EP97/01380 Sec. 371 Date Oct. 2, 1998 Sec. 102(e) Date Oct. 2, 1998 PCT Filed Mar. 19, 1997 PCT Pub. No. WO97/40436 PCT Pub. Date Oct. 30, 1997A precontrolled 3-way pressure control...
6041808 Compressed air control device for a source of compressed air on motor vehicles  
A compressed air control device for a source of compressed air on motor vehicles, forming a unit of an electro-pneumatic unloader, an integrated electro-pneumatic multi-circuit control valve and...
5957148 Valve system having a deadman controlled actuating member in a vented chamber  
A main valve receives fluid at an inlet and transmits the fluid to an outlet. The main valve has a rear face. A surge control servo valve responds to a load sense signal and moves between a closed...
5857479 Precontrolled three-way pressure reduction valve  
A precontrolled three-way pressure reduction valve having essentially vibration-free operation is encased in a cartridge and has a hollow control piston wherein a working fluid space is formed as...
5758683 On/off circuit for a hydraulic system  
An on/off, protective circuit has a pressure line with an inlet for connection to a pressure source and an outlet for connection to the pressure port of a hydraulic system, such as a reciprocating...
5735305 Unloading system for hydraulic circuit  
An unloading system including an unload valve draining a part of supplied pressurized fluid to a tank and a switching valve for draining a pressurized fluid for biasing the unload valve in a...
5375619 Protective circuit for pressure and return  
A protective circuit (40) for pressure and return connections of a hydraulic system. The protective circuit includes a four-way, two-position on/off valve (65) having a first (66), second (68),...
5323799 Fully mechanical pressure relief system  
A mechanical pressure relief system for a pressurized operating system which is suitable for high purity applications. The pressure relief system utilizes a mechanical logic switch, operable at a...
5209255 Accumulator loading valve  
An accumulator loading valve is provided which is adapted for elevated pressures, which requires but little space, and which has a pump connection (1), a reservoir connection (20), a priority...
5172624 Hydraulic device  
A hydraulic device is furnished for an automatic connection of the pressure means source, either preferably to the primary user or to the secondary user depending on the pressure in the circuit of...
4997459 Gas pressure relief system  
The gas distribution system has a main gas line in gas flow connection with several components including a gas pressure safety structure. A pressure regulator is located on a front or forward...
4700748 Pressure-referenced programmed flow control in a hydraulic valve  
The point at which pump out pressure exceeds load is sensed to provide a point for scheduling flow to an actuator in a hydraulic system. Flow is controlled by a stepper motor (28) that moves a...
4611621 Pressure control valve and oil supply device using said valve  
A pressure control valve for maintaining a control pressure constant even if the flow rate of pressurized oil varies, and an oil supply apparatus adapted for a turbo machine using this pressure...
4592378 Low pressure pool cleaner system  
An improved water jet pool cleaner system includes a pool cleaner with a buoyant housing powered about the pool by forward and reverse driving nozzles so dirt and other debris is gathered at the...
4591317 Dual pump controls  
Controls for a dual element pump having first and second pumps with separate outputs wherein a modulating valve is positionable to control the amount of fuel delivered by a first pump to a fuel...
4559965 Multiple compensating unloading valve circuit  
A multiple compensating unloading valve circuit including multiple fixed displacement pumps and corresponding compensator unloading valves which are phased so that one pump supplies the fluid...
4344451 Pressure responsive distributing valve device  
The disclosed valve device includes first, second and third user ports. A pressure accumulator connects with the first user port. With the accumulator fully charged, a pressure port connected to a...
4240255 Integrated control device for a fluid circuit and applications thereof  
The device comprises in a body a pressure limiting stage, a second stage constituting a fluid check and retarding valve and piloting means between these two stages. The second stage comprises...
4163412 Fluid cylinder control with precision stop action  
A control system for a fluid pressure-actuated cylinder or the like includes a pump supplying fluid from a reservoir to a control valve which may be selectively operated to cause cylinder...
4099378 Blocking valve for power steering for lift trucks  
An improved valving arrangement and actuator is provided for a power steering unit for a lift truck, and in particular for a battery powered lift truck. To the conventional implement valve is...
4084604 Pressure responsive distributing valve  
A pressure responsive valve for distributing the fluid under pressure delivered by a fluid pressure source to two user components, one of which is connected to an accumulator. The device includes...
4062374 Hydraulic valves and hydraulic systems  
A combined compensator and off-loading valve comprising a system pressure gallery connected to a tank or low pressure gallery by a plunger valve, the plunger having a greater area than the valve...
4020862 Apparatus for controlling the volume and pressure of a pressure medium in a die-casting machine  
Apparatus for controlling the volume and pressure of a pressure medium in a die-casting machine has an inlet, to which high pressure, high volume flow fluid can be supplied, and an outlet to a...
4016898 Means for suppressing cavitation in a high pressure relief valve  
The suppression of bubble formation and cavitation in the fluid passing through a high pressure relief valve is achieved by a back pressure valve in the relief valve discharge line. The back...
4011887 Fluid power control apparatus  
A fluid power control apparatus which comprises the unique combination of a control housing including a cylindrically shaped core member mounted in a sealed relationship within a receptacle...
4007756 Air control apparatus for an engine exhaust gas purification system  
An exhaust gas purifying apparatus for an engine, such as a thermal reactor or catalytic converter, is supplied secondary air through a secondary air control valve which is controlled by a...
3965920 Installations for monitoring oil content  
An apparatus for detecting the presence in a liquid of material that emits fluorescent radiation when stimulated by ultraviolet radiation. A chamber having an inlet and an outlet for passing a...
3911941 Pipeline pressure surge relief system  
The disclosure is of a pipeline surge relief system including a valve opened by upstream pressure against a pilot pressure which is normally maintained at the pressure of the pipeline augmented by...
3878864 Bypass valve  
A differential pressure actuated bypass valve for use in a load-responsive hydraulic system for controlling a fluid actuated device including at least one manual control valve wherein said bypass...
3834383 RESPIRATION APPARATUS WITH FLOW RESPONSIVE CONTROL VALVE  
Intermittent positive pressure breathing apparatus having a combined flow-responsive and control valve which is opened to initiate the inspiration phase of a breathing cycle by a triggering valve,...
3827453 DIRECTIONAL CONTROL VALVE  
A pressure compensated spool type directional control valve characterized in that it has a compensating piston which senses the pressure drop across a metering orifice whose flow area is...
3800670 HIGH PRESSURE IMPLEMENT HYDRAULIC CIRCUIT  
A relatively low pressure hydraulic control system for a high pressure work output system in which a control valve is selectively actuated to position a variable displacement axial piston pump to...
3726301 PILOT VALVE  
A pilot valve in which the control port is connected alternatively to a pressure port and a vent port, including two valve seats and interconnected valve elements cooperating with the seats. The...
3476017 POWER-LIMITING DEVICE FOR A MACHINE PROVIDED WITH TWO OR MORE WORKING COMPONENTS  
3452775 PRESSURE RATIO DEVICE  
3433242 FLUID BYPASS AND PRESSURE RELIEF VALVE ASSEMBLY  
3276468 Fluid pumping system with auxiliary shut-off control responsive to overpressure  
3023997 Accumulator charging valve  
2995139 Automatic custody transfer system  

Matches 1 - 50 out of 56 1 2 >