Class 251/39 - Controls inlet to choke chamber

Subclass of Class 251 - Valves and valve actuation
Definition: Subject matter in which the pilot valve admits the higher
No. of patents: 22
Last issue date: 02/05/2008

Number	Title	Issue Date
7325781	Automatic bathroom flushers with modular design A bathroom flusher includes a flusher body, a valve assembly, an electronic control system, and a flusher cover. The flusher body includes an inlet and an outlet, and is designed to accommodate the valve assembly that controls water flow between the inlet and the ou...	02/05/2008
7325627	Air tool A center portion of a handle housing portion 3 is arranged with a pressure reducing valve mechanism portion 50 for reducing a pressure of high pressure compressed air to be surrounded by an exhaust chamber 40, in a state of making a trigger 3...	02/05/2008
7188822	Enclosures for automatic bathroom flushers A bathroom flusher includes a flusher body, a valve assembly, an electronic control system, and a flusher cover. The flusher body includes an inlet and an outlet, and is designed to accommodate the valve assembly that controls water flow between the inlet and the ou...	03/13/2007
7156363	Bathroom flushers with novel sensors and controllers A bathroom flusher (10) includes a body having an inlet (12) in communication with a supply line and an outlet (16) in communication with a flush conduit, a valve assembly in the body positioned to close water flow between the inlet and the outl...	01/02/2007
7134451	Metering faucet assembly including temperature control A metering faucet assembly includes a metering cartridge valve assembly and a separate mixing control valve having a mixing valve stem that is offset relative to a valve actuator for the cartridge valve assembly and coupled to the valve actuator by a coupling mechan...	11/14/2006
7121522	Device for the regulation of flow applied to flow valves working under pressure differential A device for regulating flow comprises a main valve operating under differential pressure wherein the main valve has a main flow inlet and a main flow outlet. The main flow inlet is equipped with a valve seat over which a main shutter is adjusted in a perpendicular ...	10/17/2006
7069941	Electronic faucets for long-term operation An electronic faucet (10) mounted on a countertop (12) includes a housing, at least one fluid inlet line (24a, 24b) extending into the housing, a fluid outlet (46) from the housing, a solenoid (142, 143) for op...	07/04/2006
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
6425145	Push button for metered flow By depressing a push button (13), a user deforms a flexible diaphragm (30) and thereby causes an incompressible fluid to flow from a first actuation-chamber segment (42) through openings (48) in a divider wall (46) and into a second chamber segment (44). ...	07/30/2002
5704587	Electromagnetic valve device An electromagnetic valve device includes a valve body having a first fluid chamber, and inlet and outlet passages fluidly communicating with the first fluid chamber. In a first fluid chamber, a first movable member is slidably received within a stationary...	01/06/1998
5427351	Autoclosing flow-control valve An autoclosing flow-control valve assembly has a housing forming an inlet chamber normally filled with a fluid under pressure, an outlet chamber, and a main valve seat between the chambers. A piston defining in the housing a control chamber carries a valv...	06/27/1995
5295654	Metering valve A metering valve for controlling fluid flow is provided which includes a piston assembly disposed between a fluid inlet and a fluid outlet and mounted for relative movement within a tubular unit between a first open mode, a second open mode connecting the...	03/22/1994
5294089	Proportional flow valve A proportional flow valve wherein inlet fluid pressure urges the valve member toward the valve seat. A pressure member, which may be a piston, has an effective area substantially larger than that of the valve member, and is also selectively subjected to i...	03/15/1994
4991819	Metering valve A metering valve is provided having a piston assembly mounted for movement between open and close modes. The piston assembly is biased to assume a close mode. The piston assembly assumes an open mode only when a predetermined external force is applied to ...	02/12/1991
4921208	Proportional flow valve A proportional flow valve wherein inlet fluid pressure urges the valve member toward the valve set. A pressure member, which may be a rolling diaphragm, has an effective area about equal to that of the valve orifice and is also subjected to inlet fluid pr...	05/01/1990
4899778	Metering valve A metering valve is provided having a piston assembly mounted for movement between open and close modes. The piston assembly is biased to assume a close mode. The piston assembly assumes an open mode only when a predetermined external force is applied to ...	02/13/1990
4832310	Flush control valve A flush control valve (10) for metering a predetermined amount of flush fluid, or other liquid, to a facility, such as a urinal, to be flushed. The flush control valve (10) has a push button cap (166) that is actuated to cause the primary valve assembly (...	05/23/1989
4776561	Trigger control for air tool handle A trigger for a fluid operated tool has a control with a pilot valve which when open pressurizes a chamber to cause a throttle valve to open. When closed, the pilot valve restricts fluid flow and reduces fluid pressure in the chamber, permitting the throt...	10/11/1988
4708316	Variable rate EGR valve with step motor control and method therefor A variable flow rate valve (10) comprising; a housing (12) defining a vacuum chamber (35) and a flexible diaphragm (50) secured to said housing (12). The diaphragm defines one extreme of the pressure chamber (35) and is movable in one direction in respons...	11/24/1987
4586692	Flushometer valve integrable with a structure A flushometer valve integrable with a structure to which it is mounted....	05/06/1986
4361168	Flush valve construction A flush valve construction for water closets, urinals, showers and the like including a cylindrical jacket and associated piston assembly. A stop is adapted to be seated in the fluid supply line which will achieve flow adjustment and also render the valve...	11/30/1982
4272052	Flush valves A flush valve for releasing a predetermined volume of liquid upon actuation thereof includes a valve housing having an inlet, an outlet, a valve seating surface circumventing the inlet and a piston housing portion adjacent to the outlet. The piston is mov...	06/09/1981

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Class 251/39 - Controls inlet to choke chamber