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| Number | Title | Issue Date |
| 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 excavator, irrespective of the size of a load occurring when the option de... | 02/14/2012 |
| 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 a consumer can be supplied with pressure fluid. The metering orifice... | 10/26/2010 |
| 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 piston is provided with a piston bore through which an input port may ... | 07/28/2009 |
| 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 orifice is held off the pilot seat in the normal starting condition by a p... | 12/23/2008 |
| 7431099 | Automotive onboard fire suppression system reservoir with discharge port controlled by piloted spool valve An automotive vehicle includes a vehicle body and at least one reservoir containing a fire suppressant agent. A distribution system receives the fire suppression agent from the reservoir and conducts the agent to at least one location about the vehicle's body in res... | 10/07/2008 |
| 7357151 | Fluid control devices Improved fluid control devices are provided for metering pressure effectively in environments that may contain solid particles and in which the ambient pressure is subject to change. Such a valve comprises a valve body containing a plunger assembly contacting a firs... | 04/15/2008 |
| 7311005 | Method and device for continuous measuring of dynamic fluid consumption, including pressure regulator In a method for continuous measuring of dynamic fluid consumption, particularly fuel, the pressure beyond the flow sensor is adjusted to a constant value by means of a pressure regulator by using a continuously-operating flow sensor with variable pressure drop, pref... | 12/25/2007 |
| 7218009 | Devices, systems and methods for generating electricity from gases stored in containers under pressure A breathing system includes a container to store a gas under pressure, wherein the gas includes air or oxygen. The container includes an outlet through which the gas exits the container. The breathing system further includes a generator system including a generator ... | 05/15/2007 |
| 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 be fed to a hydraulic system, to an outlet by taking up a first swit... | 04/17/2007 |
| 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 throttle slide 10 is a valve pist... | 04/10/2007 |
| 7198060 | Pressure relieving coupler manifold with internal velocity fuse A decompression valve assembly is normally open thereby allowing thermal pressure build-up in an auxiliary circuit to be dissipated via a bleed path. During operation, the bleed path is sealed by a check valve, whereby high pressure flow can be fully directed to the... | 04/03/2007 |
| 7175155 | Control valve apparatus and pressure circuit The control valve apparatus holds a seat valve member in a position seated on a valve seat to thereby prevent a backward flow even if the pressure in the inlet chamber side becomes lower than the pressure in the outlet chamber side. With a pilot control valve member... | 02/13/2007 |
| 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 contained in the hydraulic fluid from being introduced into the relief ... | 01/09/2007 |
| 7159613 | Pressure limiting valve in a hydraulic machine having a pressure limiting valve In the housing 1 of a hydraulic machine, the pressure Pi acts in the chamber 2. For this purpose, a passage opening 4 is provided, which is formed as a valve seat 5. A valve body 6 can be displaced longitudinally in the housing ... | 01/09/2007 |
| 7137305 | Stability-enhancing admixture and improved base stabilization process for use in roadway construction and reconstruction The present invention provides a process for stabilizing the base course of a roadway through steps including admixing an asphalt emulsion and Portland cement with granulated base materials. The base course formed through this process is stronger and less permeable ... | 11/21/2006 |
| 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 out of the regulator at a reduced pressure. A pilot mechanism deliver... | 11/14/2006 |
| 7111625 | Demand valves for breathing apparatus There is described a demand valve for a breathing apparatus with a “first breath” mechanism, wherein a demand valve is held closed by resiliently latching an operating diaphragm of the valve in a position wherein the valve is closed. The diaphragm is resiliently... | 09/26/2006 |
| 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 by a main piston; an auxiliary valve is further provided, which contro... | 07/18/2006 |
| 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 prior art relief valves. This is due to the fact that, for a given size ... | 07/04/2006 |
| 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 when the tank pressure is changed, and thus a function of the relief val... | 01/17/2006 |
| 6959726 | Valve assembly for attenuating bounce of hydraulically driven members of a machine A member that is driven by a hydraulic actuator tends oscillate when fluid flow to the hydraulic actuator is terminated. A pressure relief device reduces that oscillation by connecting first and second first relief valves to the hydraulic actuator. The first relief ... | 11/01/2005 |
| 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 portions, and minimizing the use of rubber O rings. A valve hole of a pilo... | 10/25/2005 |
| 6957660 | Pressure relief valve with bidirectional damping A pressure relief valve has a valve element that is biased by a spring into a closed position. A pressure being controlled is applied to the valve element to counter the force of the spring. When the pressure applied to the valve element exceeds the force of the spr... | 10/25/2005 |
| 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) including: a first chamber (62), formed in a c... | 07/12/2005 |
| 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 which in turn is connected to the pilot valve bore. Each of the pilot ... | 11/23/2004 |
| 6805155 | 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 prior art relief valves. This is due to the fact that, for a given size ... | 10/19/2004 |
| 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 control parts are connected in series in the control line of the fittin... | 10/12/2004 |
| 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 tapered pin moves relative to the bore of the port that it is disposed i... | 09/07/2004 |
| 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 is formed. The pilot jet is preferably formed in a land surface surrou... | 08/10/2004 |
| 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 hydraulic fluid upon the occurrence of a high pressure over a pressure va... | 06/08/2004 |
| 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 surge device comprises a fast acting flow relieving valve hav... | 11/18/2003 |
| 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 pilot parts are connected in series in the control line of the... | 11/11/2003 |
| 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 hollow cylindrical main body sealingly connected at one end the... | 11/04/2003 |
| 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 for dome chamber (42). A pilot valve (46) is mounted on t... | 11/20/2001 |
| 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 sealingly engages an inner wall of the housing bore and blocks ... | 07/24/2001 |
| 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 metering orifice. The expansible auxiliary chamber slows expan... | 07/24/2001 |
| 6161570 | Pilot-operated relief valve A pilot operator and a relief valve are provided in the same housing. The pilot-operating mechanism is contained partially within the main closure element of the valve and partially within the valve cap. Inlet pressure to the valve is communicated to the ... | 12/19/2000 |
| 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 sealingly connected at one end thereof to the inlet, a pilot... | 09/19/2000 |
| 6105608 | Gas purge valve A gas purge valve comprising a valve housing that has a valve inlet and major and minor valve outlets, a valve partition mounted in the housing divides the housing into a first chamber communicating with the valve inlet and a second chamber that communica... | 08/22/2000 |
| 6039070 | 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 sealingly connected at one end thereof to the inlet, a pilot... | 03/21/2000 |
