Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7992587 | Microfluidic autoregulator devices and arrays for operation with newtonian fluids By use of the vias a microfluidic autoregulator is fabricated comprising an origin of a fluid, a sink for the fluid, a main flow channel coupling the origin and the sink, a valve communicated to the main flow channel to selectively control flow of fluid therethrough... | 08/09/2011 |
| 7617841 | Pressure-dependent check valve and hydraulic system equipped therewith The inventive sliding valve (8) comprises a slide (18), which is mounted in a manner that enables it to move transversal to the passage channel (11). This valve is provided with an asymmetrical design whereby enabling the pressure prevailing in ... | 11/17/2009 |
| 7398793 | Rapidly opening pressure regulating valve, fire extinguishing apparatus using the same, high-pressure gas cylinder apparatus and apparatus for rapidly supplying fluid A rapid opening pressure regulating valve reduced in size and having improved flow rate characteristics, a fire extinguishing apparatus using the same, a high-pressure gas cylinder apparatus, and an apparatus rapidly supplying a fluid. When the rapid opening pressur... | 07/15/2008 |
| 7341074 | Multi-stage pressure regulator A pressure regulator that has particular application for an anode input side of a fuel cell system to provide the desired large turn-down ratio. The pressure regulator includes at least two valves positioned in parallel where the first valve is smaller than the seco... | 03/11/2008 |
| 7294278 | Method for oxygenating wastewater A method and apparatus creates gas-enriched fluid that is used to treat wastewater. In one embodiment, the wastewater is withdrawn from a supply of wastewater to be treated, and the wastewater is delivered in an atomized manner to a vessel pressurized with gas to fo... | 11/13/2007 |
| 7284471 | Pressure control valve having intrinsic mechanical feedback system A method and system for controlling the dynamics of an actuatable load functioning or operable within a servo or servo-type system, wherein the dynamics of the load are controlled by way of a unique pressure control valve configured to provide intrinsic pressure reg... | 10/23/2007 |
| 7255127 | Vacuum regulator and intermittent flow device A vacuum regulator and intermittent flow device are disclosed. Vacuum regulation is achieved via spring forces acting on a movable piston-tube assembly disposed within a regulator body having a cylindrical hollow interior. Vacuum is supplied to an input port and reg... | 08/14/2007 |
| 7255126 | Sanitary liquid pressure regulator A liquid pressure reducing regulator having a pressure receiving means in liquid communication with the liquid inlet passage, upon which a liquid in the liquid inlet passage can exert a balancing force, and a means for communicating the balancing force to the diaphr... | 08/14/2007 |
| 7182857 | Pressure limiting and/or flow regulating valve for use with POU/POE filter system An apparatus comprising a pressure limiting valve for preventing transmission of elevated pressure to components downstream of the apparatus. Preferably, the pressure limiting valve is used in combination with a flow regulating device that maintains a substantially ... | 02/27/2007 |
| 7178335 | Pressure regulator A pressure regulator includes a housing, a metering spool, a first pressure chamber at a reference pressure to which one end of the metering spool is exposed, a spring within the first pressure chamber acting against the one end of the metering spool, a second press... | 02/20/2007 |
| 7118358 | Scroll compressor having a back-pressure chamber control valve There is provided a scroll compressor having high overall adiabatic efficiency and reliability in a wide pressure operating range. A backside excess-suction-pressure region is provided such that pressure higher than suction pressure by a constant value is applied to... | 10/10/2006 |
| 7013916 | Sub-atmospheric gas delivery method and apparatus An apparatus for containing and delivering hazardous gases at sub-atmospheric pressure from a pressurized container is provided which includes a valve body in sealed communication with an outlet orifice of the pressurized container. The outlet orifice of the pressur... | 03/21/2006 |
| 7008535 | Apparatus for oxygenating wastewater A method and apparatus creates gas-enriched fluid that is used to treat wastewater. In one embodiment, the wastewater is withdrawn from a supply of wastewater to be treated, and the wastewater is delivered in an atomized manner to a vessel pressurized with gas to fo... | 03/07/2006 |
| 6994113 | Closing device for use in a valve device for a pressurized gas cylinder A device for closing a gas inlet in a valve device for a pressurized gas cylinder has a freedom of translation between an extreme gas inlet closing position and an open position at an extreme stop position or an intermediate position determined by the position of a ... | 02/07/2006 |
| 6973857 | Hand tool adjuster An adjusting device for a tool includes a body with two ends and a fluid filled passageway, which extends between the ends, one end of the body cooperates with a work piece. An actuating member is movably connected to one end of the body, communicates with the fluid... | 12/13/2005 |
| 6962318 | Pulsed input shutoff valve Methods and devices for shutting off flow in fluid lines by an automated remote sensor signal, when leakage is detected, are disclosed. A shutoff valve has an inlet for connection to the upstream end of the pressurized fluid line, an outlet for connection to the dow... | 11/08/2005 |
| 6934976 | Toilet flusher with novel valves and controls A tank-type flusher includes an intake valve, i.e., a fill valve, a diaphragm-operated flush valve, and a pressure control mechanism. The intake valve is connected to an external water source and is constructed to close water flow to a water storage tank at about a ... | 08/30/2005 |
| 6929026 | Sanitary liquid pressure regulator A pressure building regulator having a pressure receiving means in liquid communication with the liquid outlet passage, upon which a liquid in the liquid outlet passage can exert a balancing force, and a means for communicating the balancing force to the diaphragm o... | 08/16/2005 |
| 6840269 | Pressure reducer for a fluid sampling device The present invention generally relates to a pressure reducer that can regulate a fluid sample flow and decrease pressure automatically without adding any extra media. More particularly the pressure reducer has a casing having a sample inlet for receiving the fluid ... | 01/11/2005 |
| 6722388 | Multiple pressure regulator A pressure regulator having a valve cartridge adapted to be removably held within its housing, said cartridge having a frame carrying and positioning a valve seat, a valve member, a valve stem, and a spring. The valve cartridge ensures correct spacing between the va... | 04/20/2004 |
| 6357838 | Mechanical oil pressure control apparatus for antilock brake system A mechanical oil pressure control apparatus for an antilock brake system including a recessed first body having an oil inlet passage communicating with a master cylinder and an oil outlet passage communicating with a wheel cylinder, a hollow second body t... | 03/19/2002 |
| 6321772 | Vacuum pressure-adjusting apparatus The air (atmospheric air) is introduced from an atmospheric port, and it is throttled to give a minute amount by means of a bleed hole. The air is introduced into a vacuum chamber via a bleed passage, and it is introduced into a pressure regulator port vi... | 11/27/2001 |
| 6276392 | Liquid pressure regulator A pressure regulator is provided that can produce a relatively constant outlet pressure over a range of flow rates. A spring backed diaphragm reacts against the inlet pressure to produce this desired outlet pressure. To provide a range of outlet pressures... | 08/21/2001 |
| 6240951 | Inflation system and valve for use therein A valve for use in an inflation system wherein the valve has a spring regulated piston which regulates the flow rate through the valve into the inflatable member, such that if the flow rate gets too high, the regulating piston will divert some or all of t... | 06/05/2001 |
| 6227238 | Valve providing pressure differential proportional to downstream pressure An apparatus for providing a hydraulic pressure differential proportional to a downstream pressure. The apparatus includes a first chamber having a first cross section area, a main chamber portion, a first end, and a second end; a first spool portion loca... | 05/08/2001 |
| 6209578 | Constant flow valve A regulating valve is disclosed for controlling the flow of fluid from a variable pressure fluid supply. The valve includes a diaphragm which is resiliently biased into a normally closed position, and which shifts to an open position when exposed to a flu... | 04/03/2001 |
| 6050973 | Pressure limiting device An apparatus for limiting the pressure of inflation fluid injected into one or more balloon of a catheter device comprising a reservoir chamber having an inlet port coupled in fluid communication with an inflation/deflation device and a plurality of outle... | 04/18/2000 |
| 6026850 | Pressure regulating valve A pressure regulating valve adapted to be interposed between a pressurized liquid supply whose pressure varies and a spray nozzle or other liquid applicator from which the liquid is discharged. The valve, actuated only when the pressure of the incoming li... | 02/22/2000 |
| 5975128 | Shut-off or throttle valve with pivotal flap A shut-off or throttle valve comprises a housing (12) defining a flow passage and a valve flap (18) to be pivoted about an axis of rotation (20) extending across the flow cross-section of the valve. The valve flap (18) in its closed position is located in... | 11/02/1999 |
| 5950671 | Over-pressure protection of a fluid sensor Apparatus for protecting a fluid sensor against excess fluid pressure that includes a manifold having an internal fluid passage and a fluid inlet for connecting the passage to a fluid system. A piston is disposed within the passage adjacent to one end of ... | 09/14/1999 |
| 5860448 | Oil pressure supply valve for a traction control system An oil pressure supply valve for a traction control system, the structure of which is simple and small in size, that improves the function of the traction control system by securing enough flowing volume of the brake oil. The oil pressure supply valve inc... | 01/19/1999 |
| 5799688 | Automatic flow control valve A pressure valve having a fluid inlet, a first chamber, a throughbore, a second chamber, a fluid outlet and a valve stem. The valve stem is mounted within a valve body and has several different diameters. A pressure condition within one or more of the cha... | 09/01/1998 |
| 5746245 | Meters The meter 2, e.g. a gas meter includes an inlet boss 4 providing an unregulated supply of gas via a valve means 8 which regulates the flow of gas as it passes into a chamber 6. The valve means 8 forms part of a governor which is formed integral with the g... | 05/05/1998 |
| 5738136 | Pulsator device and method A fluid pulsator includes a housing containing a fluid reservoir, an inlet port, an outlet port, and a valve assembly biassed to an open position by a predetermined biassing force, the valve assembly includes a surface exposed to the inlet pressure to clo... | 04/14/1998 |
| 5722454 | Fluid flow fuse A fluid flow device has a body which includes an inlet and an outlet with a valve seat therebetween. A valve stem having a valve member thereon is mounted in the body, and the valve member is operably connected to a diaphragm which separates a region with... | 03/03/1998 |
| 5694977 | High pressure enabled, low pressure activated automatic fluid control valve A simple and highly reliable automatic valve is disclosed which is enabled y being subjected to a predetermined pressure and actuated as pressure is reduced from that pressure. A pressure differential of several orders of magnitude between enablement press... | 12/09/1997 |
| 5660200 | Double-valved variable pressure device for hydrocephaly The present invention relates to a double-valved variable pressure device for hydrocephaly having a vertical capsule with sloped ends ending in upper and lower coupling sectors appropriate for connection to a proximal catheter and a distal catheter that c... | 08/26/1997 |
| 5630935 | Pressure relief valve with sample removal port A water pressure relief device includes a sample removal port to permit samples of water to be removed from the device. The device has an insert placed in a central chamber disposed generally above the sample removal port. The user inserts an implement su... | 05/20/1997 |
| 5620023 | Exhaust-control valve for an electromagnetic pump An exhaust control valve for an electromagnetic pump is disclosed. By the exhaust control valve, pressure and quantity of exhausted oil is maintained constant, noise is reduced, an incomplete combustion of oil is prevented and energy efficiency is improve... | 04/15/1997 |
| 5597012 | Valve with a threshold with retractable push rod A valve assembly having a body with a bore. The housing has an inlet for communicating pressurized fluid to the bore and an outlet for delivery of the fluid to a system. A piston located in the bore carries a valve element connected to a push rod. The pus... | 01/28/1997 |
