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Document Title |
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8113233 |
Hydraulic circuit of option device for excavator
A hydraulic circuit of an option device for an excavator is disclosed, which can constantly supply hydraulic fluid to an option device, such as a breaker and so on, selectively mounted on the...
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7946358 |
Sequence valve and a downhole tractor
The invention relates to a sequence valve for use in a hydraulic plant, which sequence valve has a pressure-controlled slide valve (5) with a spring return and in a starting position defines a...
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7819130 |
Metering orifice arrangement for a hydraulic current divider and current adding device
There is disclosed a variable metering orifice arrangement for a current divider and current adding device, the metering orifice arrangement including one or more working terminals by each of which...
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7665579 |
Flow control valve having pressure compensating valve
A flow control valve includes a pressure compensating valve and a first switching valve. The pressure compensating valve is configured to enlarge an opening area of a variable orifice between a...
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7565915 |
Feed pressure valve
What is disclosed is a pilot-controlled pressure feed valve comprising a main stage and a pilot control stage, wherein the main stage comprises a piston that is biased into a closed position. The...
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7467642 |
Soft ventable relief valve
A pilot operated pressure valve which limits the rate of pressure rise and substantially eliminates excessive system and tank pressure spikes. Because the pilot ball downstream of the damping...
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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 can...
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7201183 |
Valve arrangement in a hydraulic circuit, use of the same and arrangement for controlling a hydraulic vehicle drive
A valve arrangement in a hydraulic circuit comprises a longitudinal duct 3 and a transverse duct 2. A throttle slide 10 can be displaced in the direction of the longitudinal duct 3. Arranged in the...
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7159610 |
Relief valve
Disclosed is a relief valve, in which a flow rate of hydraulic fluid is not greatly changed even when temperature is changed, and thus providing smooth operation and preventing foreign materials...
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7134447 |
Gas pressure regulator
A gas pressure regulator has an inlet for connection to an upstream gas line for flow of gas into the regulator under pressure and an outlet for connection to a downstream gas line for flow of gas...
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7077157 |
Spring-loaded pressure relief valve, particularly for containers of pressurized fluids
A spring-loaded pressure relief valve, particularly for containers of pressurized fluids, comprising a valve body that is associable with a container and forms a discharge port that is controlled...
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7069945 |
Cartridge relief valve with improved stability
A cartridge relief valve uses a piston design. The piston replaces a tube used in prior art relief valves. The piston makes the inventive relief valve easier to manufacture and more stable than...
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6986362 |
Pilot operated relief valve
Disclosed is a pilot operated relief valve, in which a balance system is provided to offset a tank pressure exerted on a piston, so that a setting pressure of a pilot poppet is not changed even...
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6957663 |
Solenoid control valve
The object of the present invention is to provide a solenoid control valve simple in construction and low in cost, realized by reducing the number of component parts, eliminating screw-joined...
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6915787 |
Fuel supply apparatus and fuel pressure regulator
A fuel supply apparatus having a fuel pressure regulator (60) for regulating the pressure of fuel discharged from a fuel pump (4) to a predetermined pressure, the fuel pressure regulator (60)...
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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...
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6802339 |
Assembly having a spring-loaded tandem control valve
The fitting, in particular a safety valve, operates according to the relief principle or according to the loading principle. The fitting is opened and closed by a plurality of control parts. The...
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6786231 |
Fluid flow regulator with restrictor pin
A fluid flow regulator having a chamber comprising a port opening and a tapered pin disposed within the opening, for controllably restricting the cross-sectional flow area through the port. The...
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6772785 |
Demand valve for breathing apparatus
There is described a demand valve for a breathing apparatus wherein a pilot jet of the demand valve is controlled by a pivoting lever resiliently held against a planar face in which the pilot jet...
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6745792 |
Hydraulic relief valve
In a hydraulic relief valve having a main poppet draining into a pressure-oil tank hydraulic fluid flowing into a sleeve from a hydraulic pump and a pilot poppet draining into the oil tank the...
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6648010 |
Check valve plate with anti-pressure surge device
An ant-pressure surge device mounted in or on a closure member (1) of a check valve to eliminate overpressure and reduce shock waves in a pipeline when the check valve closes. The anti-pressure...
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6644346 |
Spring-loaded tandem control valve
The fitting, in particular a safety valve, operates according to the relief principle or according to the loading principle. The fitting is opened and closed by a plurality of pilot parts. The...
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6640830 |
Pilot operated pressure valve
A pilot operated pressure valve which limits the rate of start-up pressure rise (“soft start-up”) and substantially eliminates excessive system pressure spikes. The valve includes an inlet, a hol...
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6318406 |
Pilot operated relief valve
A pilot operated safety relief valve (14) having a main piston valve member (26). A dome chamber (42) is provided in the valve body (18) over piston valve member (26) and a cap (44) forms a closure...
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6263909 |
Valve assembly
A valve assembly for a hydraulic discharge device and including a piston displaceable in a bore of a housing of the discharge device against a biasing force and having an outer surface, which...
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6263908 |
Slow opening gas valve
An improved slow opening gas valve providing for continuous gradual and smooth opening of the gas valve includes an expansible auxiliary chamber connected to an expansible control chamber by a...
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6119722 |
Pilot operated pressure valve
A pilot operated pressure valve which limits the rate of pressure rise and substantially eliminates excessive system pressure spikes, the valve including an inlet, a hollow cylindrical main body...
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5992450 |
Cartridge valve having solenoid bypass and integral relief valve
A pump assembly (33) including a cartridge valve assembly (39) having a poppet member (69) biased toward a closed position (FIG. 4) when a pilot portion (51) is closed, under the influence of an...
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5954138 |
Fire extinguisher valve and fire-extinguishing equipment
The fire-extinguishing device proposed includes a container, holding a gas under pressure, and a fusible hollow element designed to actuate the device. The fusible hollow element is connected to...
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5771921 |
Pressure regulator
A pressure regulator for supplying water to an associated watering system for poultry or the like includes a top works structure and a bottom works structure which are formed of few parts, which...
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5730182 |
Pressure compensation valve
A pressure compensation valve is constructed with a valve establishing and blocking a communication between an inlet port and an outlet port, a pressure receiving chamber, a piston driven by a load...
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5546980 |
Floating cage cartridge valve and knob
A cartridge valve for installation in a manifold having a receiving cavity which includes an inlet port and an outlet port. The cartridge valve includes a cavity adaptor for engaging the cartridge...
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5460198 |
Pressure-activated flow-control valve
A valve assembly used in combination with a pressurized-fluid source having a high-pressure side and a low-pressure side and a load has a pressure-actuated flow regulating valve having a housing...
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5400817 |
High-capacity pressure limiting valve
A pressure limiting valve with rates of flow of more than 8,000 l/min exhibits a valve casing comprising a control piston and valve piston. These valve casings are arranged inside the casing so as...
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5396924 |
Pressure limiting valve with replacement control valve
A pressure limiting valve with high flow rates, but in particular with a good adaptability to the respective conditions, is constructed so that the control piston and the valve piston are...
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5301920 |
High-speed solenoid valve apparatus
A high-speed solenoid valve apparatus has a body, and a high-speed solenoid valve section and a logic valve section disposed in the body. The high-speed solenoid valve section includes a solenoid...
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5295663 |
Pressure control valve
A pressure control valve is provided comprising an inlet bore, an annular channel and a control spool. So as to obtain a low control deviation and good stability an annular channel is provided at...
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5195556 |
Pressure relief valve
A pressure relief valve (1) has a relief piston (5) for a large stream of oil and a precontrol piston (11) for a small stream of oil for influencing the point of actuation of the reliefing piston....
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5174328 |
Pressure control valve
In a pressure control valve having a valve body (1), a pilot poppet (7) is so mounted in the body (1) as to permit/prevent communication between a low-pressure relief port (12) and a back-pressure...
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5136845 |
Hydrostatic transmission and relief valve therefor
A hydrostatic transmission is provided of the type including a pump (15), a motor (17), and a pintle assembly (35) defining high (61) and low (63) pressure fluid conduits. In communication with the...
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5097746 |
Metering valve
A metering valve adapted to operate a seat on a side of an actuator port by means of a poppet section of a main poppet arranged in a valve casing to selectively communicate the actuator port to a...
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5080129 |
Pilot operated pressure reducing valve
The present invention provides a pilot operated pressure reducing valve in which the pilot liquid (generally the pilot fluid) is taken from the low pressure side, wherein two pilot liguid...
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5072752 |
Bidirectional cartridge valve
A bidirectional cartridge valve comprises a generally cylindrical valve housing including an end port and a side port each opening into an axial, cylindrical bore defining a valve chamber. A flow...
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4896694 |
Pressure-limiting valve
To reduce the noise on response of a pressure-limiting valve, downstream of the valve seat an annular space, an annular gap and a further annular space are provided. This flow-off system gives a...
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4873817 |
Electrically controlled pressure relief valve system and method
An electrically controlled, proportional, pressure relief valve (100/200) used to control the maximum allowable pressure in a hydraulic line (3), whose pressure is used to control, for example, the...
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4850345 |
Pilot operated valves
There is disclosed a pilot operated valve which includes a valve body, a main valve having a main valve member controlling fluid communication between an inlet port and an outlet port, a pilot...
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4821767 |
Pressure regulator
A pressure regulator comprises a housing (1) defining first and second chambers separated by a movable partition (4,5), the first chamber being provided with an inlet port (2) facing towards and...
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4776243 |
Hydraulic safety interlock system
A power tong assembly wherein a safety latch mechanism includes a power part equipped with two outlet side connections, one of which is connected to a control part for controlling the opening cross...
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4771806 |
Pilot-controlled pressure-limiting valve
A compact pressure-limiting valve is provided for optional attachment to a water-conducting device which for this purpose comprises a flange which matches the connecting flange of the...
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4766931 |
Submerged valve
A valve for periodically opening and closing a flow path 11 leading to a suction source for predetermined periods is disclosed. The valve comprises a body 12 defining a first flow passage 13 and a...
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