Famous Patents
British merchant Peter Durand invented the tin can in 1810.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7293576 | Single-piece manifold with reduced pressure arrangement A single-piece manifold comprising a body having an inlet in communication with a water supply and an outlet that communicates with a sprinkler system having a main conduit adapted for fluid flow between the inlet and the outlet is disclosed. The body includes a mai... | 11/13/2007 |
| 7063100 | Flow regulator with pressure relief combination valve A flow regulator with pressure relief combination valve is disclosed which can include a housing and a valve assembly. The housing can have a chamber and four ports. A cage, having a plurality of cross holes, is supported by the housing. A hollow spool is slidably d... | 06/20/2006 |
| 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 the inlet opening and the outlet opening. A shuttle valve is dispose... | 02/22/2005 |
| 6739853 | Compact control mechanism for axial motion control valves in helical screw compressors An axial slide valve is provided with an axially extending fluid chamber at each end with one chamber receiving a spring and being acted on by suction pressure and the other chamber coacting with a fixed piston and being acted upon by discharge pressure or the like ... | 05/25/2004 |
| 6415809 | Fluidic valve assemblies having improved fluidic valve mechanisms, and devices operable therewith A fluidic valve assembly having a fluidic valve mechanism similar to the mechanisms in U.S. Pat. Nos. 5,003,780 and 5,348,040 provided with improved valve positioning devices which provide improvements in providing the force to move the valve members, and... | 07/09/2002 |
| 6334458 | By-pass valve in particular for pressure-washing machines The invention relates to the sector of pressure-washing machines, in the form of a valve with by-pass function when the gun is closed, and allows reduction of the pressure inside the delivery duct during operation in by-pass mode. In particular this valve... | 01/01/2002 |
| 6328535 | Flow control valve capable of adjusting fluid flow characteristics in accordance with a position of a valve element in a bore A flow control valve has body (20) containing a "bucket" shaped valve element (1) that moves in a bore (2). The valve element (1) has a discharge orifice (8) through which a needle valve (9) projects. Movement of the valve element (1) within the bore (2) ... | 12/11/2001 |
| 6116217 | Full authority rail pressure-reduction valve A hydro-mechanical device and methods therefor, for receiving fuel from a variable displacement fuel pump of a fuel-supply system and delivering the fuel to a common rail of the fuel-supply system, regulates the fuel-pressure in the fuel-supply system, at... | 09/12/2000 |
| 6089248 | Load sense pressure controller DANA 90 A load sense pressure controller used with a hydraulic control valve such as a hydraulic direction control valve includes a body in the form of a barrel having a threaded first end and a threaded second end. An externally threaded first plug is th... | 07/18/2000 |
| 6026840 | Hydraulic control system A hydraulic control system for connecting elements, which is particularly applicable for an externally engaged clutch on an engine, comprises a pump for producing an oil stream, a distributing valve for determining the flow path of the oil stream, a throt... | 02/22/2000 |
| 5860797 | Flow rate control device for a pump A flow rate control device for a pump includes a housing, a choke tubular passageway connected between a pump pressure chamber and an output chamber, a spool valve which is slidably provided in the housing, and which has both ends exposed in the pump pres... | 01/19/1999 |
| 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 provides an "easy-start" feature and has a valving chamber... | 02/17/1998 |
| 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 torque for starting when the air compressor is loaded with... | 10/28/1997 |
| 5669405 | Apparatus and method for automatically disabling pressure relief valve of backflow preventer An apparatus and method for automatic disablement of a pressure relief valve used in connection with a backflow preventer in a fire line. A normally open solenoid valve is included in a pressure sampling line, extending from an inlet, or upstream chamber ... | 09/23/1997 |
| 5564458 | Timing valve for the discontinuous metering of a volume flow In a constant timing valve for the discontinuous metering of a volume flow, in particular the flow of cooling water flowing through a heat exchanger of a motor vehicle heater, the volume flow flowing through the valve outlet (17) is maintained constant re... | 10/15/1996 |
| 5513672 | Valve assembly A valve assembly for controlling volume flow from a discharge device to an actuator and including a discharge throttle, and a flow control valve for controlling flow through the throttle and having a piston, and end portion of which overlaps a channel for... | 05/07/1996 |
| 5501245 | Coaxial pressurized fluid flow regulator A pressurized fluid flow regulator for controlling fluid in a fluid circuit is disclosed having a high pressure feed chamber in fluid communication with a source of pressurized fluid and with an exhaust chamber which, in turn, has a fluid outlet connected... | 03/26/1996 |
| 5385329 | Method and apparatus for enhancing stability in hydraulic flow control A flow control valve having a piston and valve element connected together by a portion of a spring also connected to a pressure relief mechanism. Also disclosed is an alternative embodiment featuring a passage delivering metered flow from an input passage... | 01/31/1995 |
| 5322217 | Vehicle heating system and bypass therefor A heater circuit in a vehicle engine cooling and passenger compartment heating system comprises a control valve (26), and a supply line (22) and a return line (24) both of which are separate from the radiator circuit of the system. A bypass passageway (48... | 06/21/1994 |
| 5311905 | Remote dump and safety valve A remote pressure sensitive dump valve which includes a housing having first, second and third fluid ports, the first fluid port adapted for connection to a source of very high pressurized fluid, the second fluid port being adapted for connection to a rem... | 05/17/1994 |
| 5172716 | Recirculation valve A recirculation valve for cooling a centrifugal pump. The invention comprises a valve casing having a first chamber for connection to a centrifugal pump and a second chamber for connection to a fluid outlet, a recirculation port for redirecting fluid from... | 12/22/1992 |
| 4967783 | Recirculation valve with pilot valve A recirculation valve with pilot valve. The claimed invention comprises a housing containing an inlet chamber for receiving liquid from a pump, an outlet chamber for transporting liquid downstream of said valve and a recirculation port for recirculating l... | 11/06/1990 |
| 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 first port for introducing fluids into said first chamber,... | 07/17/1990 |
| 4917138 | Priority flow control valve for hydraulic power circuits A priority flow control valve for power circuits in hydraulic equipment, which is conventional in basic design, but makes use of an additional piston to impinge on the movable seat of a bias spring housed in a cylindrical chamber that connects with the co... | 04/17/1990 |
| 4895180 | Anti-backflow valve An anti-backflow valve to prevent back-flow of water within a water supply line comprises a cross-shaped housing arranged symmetrically with respect to a vertical center axis. A diaphragm is clamped between the housing and a cover and acts via a valve ste... | 01/23/1990 |
| 4865068 | Bleed control apparatus for a fluid conveying system A self contained mechanical bleed control apparatus for a fluid conveying system, such as a central vacuum system or a pressurized air system, includes a slide member housing which slidably supports an orifice plate having an air foil on one end disposed ... | 09/12/1989 |
| 4779639 | Automatic recirculation valve An automatic recirculation valve is disclosed which utilizes three valve elements to accomplish particularly smooth and nondisruptive switching of fluid flow between main fluid flow and recirculation fluid flow. A unique back pressure control valve provid... | 10/25/1988 |
| 4663936 | Load sensing priority system with bypass control A load sensing priority flow control system is disclosed of the type including an engine-driven pump (11), a load sensing priority flow control valve (15), a priority load circuit (steering control valve (17) and steering cylinder (21)), and an auxiliary ... | 05/12/1987 |
| 4638831 | Valve arrangement for unloading liquid flow at a non-return valve A minimum flow valve device includes a housing providing a liquid passageway therethrough having an inlet end and an outlet end; a guide element mounted in the liquid passageway which provides an internal chamber that is open towards the inlet end of the ... | 01/27/1987 |
| 4527580 | Volume control device A volume control device for a sealed reservoir for storing oil under pressure and which supplies oil to a power circuit. The volume control device has an expansible bellows assembly which contracts upon a predetermined increase of volume of oil in the res... | 07/09/1985 |
| 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 fluid therethrough, the wall of the housing having through h... | 09/11/1984 |
| 4430846 | Electrohydraulic drive and control The present invention provides an electrohydraulic control, which includes both an electrohydraulic valve (36) and an electronic control (382). The electronic control includes an offsetting circuit (622) and is effective to produce an effective driving vo... | 02/14/1984 |
| 4243064 | Bypass valve for pumps, heating systems and the like A bypass valve with a tubular housing having an inlet at one end, a main outlet at the other end and a bypass outlet between the ends. A larger-diameter valving element controls the flow of fluid from the inlet to the main outlet, and a smaller-diameter v... | 01/06/1981 |
| 4240457 | Variable flow control valve for steering systems of articulated vehicles The steering system comprises at least one double-acting fluid cylinder, a directional control valve connected to the cylinder for alternately extending and retracting the cylinder and a hand metering unit for communicating a fluid steering signal to the ... | 12/23/1980 |
| 4231386 | Differential pressure relief valve A differential pressure relief valve formed of a housing having first and second chambers sealed from the atmosphere and separated by an annular diaphragm with the chambers and the annulus of the diaphragm traversed by a moveable sleeve. The first chamber... | 11/04/1980 |
| 4185772 | Condition response differential vacuum regulator and method of making the same A differential vacuum regulator having an input chamber and an output chamber and a control arrangement for providing an output signal in the output chamber that has a constant differential value from the value of an input signal in the input chamber, the... | 01/29/1980 |
| 4121610 | Electrically operated proportional flow control hydraulic valve and manually operable remote control device therefor A proportional fluid flow control hydraulic valve including a valve body in which a by-pass flow passage leads from an inlet port to a by-pass outlet port. A valve chamber is arranged between the inlet port and a regulated flow outlet port and the by-pass... | 10/24/1978 |
| 4085767 | Reverse flow valve for pneumatic systems A reversible valve for selectively delivering a pressurized gaseous mixture to and exhausting it from a reversible air motor or other pressure operated device. The valve has a perforate piston actuated by introducing the pressurized gas to a through flow ... | 04/25/1978 |
| 4068678 | Valve for hydraulic systems A valve device having a pressure operable valve piston, particularly for booster steering systems, to selectively control pressure flow to a consumer device such as a hydraulic servomotor in order to permit use of a reserve pump in event of failure of a m... | 01/17/1978 |
| 4016895 | Flow control valve A flow control valve for controlling the output at first and second delivery ports in response to the output of a single pump connected to the inlet port of the valve, is disclosed. The valve includes a stepped bore the reduced portion of which is adjacen... | 04/12/1977 |
