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| Number | Title | Issue Date |
| 7328854 | Fluid control valve and droplet ejection device Exemplary embodiments can provide a fluid control valve, which reduces or prevents any bubble from being built up in the valve itself so as to protect other hydraulic equipment placed in a downstream side from having any malfunction due to such a bubble, and a dropl... | 02/12/2008 |
| 7237573 | High pressure, low flow rate fluid flow control An adjustable high pressure, low flow metering valve provides a sleeve extending about a restrictor shaft, the sleeve having a narrow helical groove formed in the inside diameter. A restrictor shaft within the sleeve encloses the groove and forms a sealed helical fl... | 07/03/2007 |
| 5857478 | Demand responsive flow control valve A demand responsive flow control valve including a housing in a fluid conduit between a pump and a motor vehicle power steering gear, a flow control orifice in the fluid conduit, and a valve pintle supported on the housing for linear translation. An inboa... | 01/12/1999 |
| 5832949 | Control valve The invention provides a control valve wherein a restrictor can be formed simply in an oil passage for introducing pressure oil on the downstream side of an orifice into a pressure chamber. The control valve is generally constructed such that pressure oil... | 11/10/1998 |
| 5785075 | Fluid-flow control valve A fluid-flow control valve device comprises a control orifice being fluidly disposed upstream of the outlet passage for variably restricting a flow of working fluid from the inlet passage to the outlet passage, a valve spool slidably accommodated in the s... | 07/28/1998 |
| 5775360 | Pressure control valve The invention provides a pressure control valve which can be made of aluminum as much as possible and has a comparatively light weight and wherein a seat member made of steel can be force fitted into a spool of aluminum at a room temperature. The pressure... | 07/07/1998 |
| 5706849 | Flow control valve In a flow control valve, a valve spool is movable for variably controlling an opening area of a port portion of a drain passage so that a necessary flow rate of fluid is conducted from a first pressure chamber to an outlet passage through a control orific... | 01/13/1998 |
| 5337778 | Pressure control valve A pressure control valve of the type having pump, tank and load-sensing connections used in conjunction with one or more proportional type valves. In this type of system a load-sensing signal is tapped off from the output side of the proportional valves a... | 08/16/1994 |
| 5220939 | Flow control apparatus A flow control apparatus is disclosed which includes a housing, a cylinder disposed in the housing and a spool disposed in the cylinder while being urged in one direction along the axial direction of the cylinder. The spool slides along the axial directio... | 06/22/1993 |
| 5137046 | Fluid metering apparatus A fuel control apparatus for supplying metered fluid at a variable pressure to a turbine engine in response to an electrical signal. A solenoid responds to the electrical signal to vary the flow rate of the fluid to an outlet and to regulate the pressure ... | 08/11/1992 |
| 5078173 | Droop compensated bypass valve A droop compensated bypass valve for use with a metering system having a high pressure fluid supply line, a metering valve connected to the high pressure supply line, and a low pressure supply line connected to the metering valve. The bypass valve include... | 01/07/1992 |
| 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 |
| 4840244 | Automatic regulator valve assembly for vehicle power steering An automatic regulator valve assembly is provided to vary fluid flow to a power steering gear in response to steering gear hydraulic pressure in order to provide optimum road feel, as well as optimum power assist throughout the range of vehicle operating ... | 06/20/1989 |
| 4768540 | Flow control apparatus A flow control valve comprising a housing formed with an intake passage, a drain passage and a discharge passage; a main spool and an auxiliary spool which are slideably housed within the housing; a first orifice disposed between the intake passage and th... | 09/06/1988 |
| 4753264 | Flow control valve A flow control valve which exhibits a so-called drooping response is provided which causes the flow rate supplied to a hydraulic instrument to be reduced as a discharge flow from a pump increases. A union is inserted into and fixedly connected to a bore w... | 06/28/1988 |
| 4708156 | Fuel burner pump assembly The invention relates to a fuel burner pump assembly of the type having a main regulating valve for controlling a supply of fuel to a burner nozzle and a flow responsive bypass valve for bypassing fluid from the main valve until a predetermined flow rate ... | 11/24/1987 |
| 4625747 | Pressure responsive flow divider valve for servo-powered steering devices A pressure responsive flow divider valve for servo-powered steering devices comprises a flow control valve having three ports to divide the fluid flow delivered by a pump between a pair of partial volumes, one flowing to the steering valve and the other f... | 12/02/1986 |
| 4585169 | Constant volume flow burner fuel control system A pair of positive displacement pumps are connected in series between a liquid fuel supply tank and a burner nozzle. Mechanically linked, identical variable orifices are interposed within the supply line between the pumps and the nozzle. A first pressure ... | 04/29/1986 |
| 4570667 | Demand responsive flow regulator valve A demand responsive flow regulator valve for use with a power steering pump and steering mechanism has a valve spool slidably disposed in a housing and responsive to a pressure differential across an orifice for the purpose of bypassing excess pump flow. ... | 02/18/1986 |
| 4570662 | Demand responsive flow control valve A demand responsive flow control valve mechanism has a valve member which receives fluid flow from a power steering pump and delivers a predetermined amount of fluid to an operating system such as the power steering gear. The excess fluid delivered by the... | 02/18/1986 |
| 4458713 | Bypass-type differential pressure regulator The pressure regulator includes a valve member which is supported to slide back and forth in a valve housing having a high pressure port, a low pressure port and a bypass port. Pressure fluid from the high pressure port is bypassed through the valve membe... | 07/10/1984 |
| 4442857 | Flow control valve A flow-control valve exhibits a flow-drooping characteristic such that the liquid supply into an oil pressure mechanism is decreased in response to an increase of the amount of liquid discharge from a pump. The pump outlet passage forms branches into a fl... | 04/17/1984 |
| 4418710 | Pilot control valve for load sensing hydraulic system A pilot control valve (35) is provided for use in a load sensing system including a priority flow control valve (21). The pilot valve includes a flow orifice (47) through which passes flow from the priority outlet port (23) to the motor (13). The pilot va... | 12/06/1983 |
| 4396033 | Flow volume control device for a power assisted steering device A flow volume control device for a power assisted steering device having a main control valve device, whose main valve spool is movable to establish the communication of an inlet passage with a bypass passage when the flow rate of pressurized fluid suppli... | 08/02/1983 |
| 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 |
| 4117857 | Fuel control system for a prime mover The flow rate of fuel to a gas turbine engine is controlled by a pivoted flapper valve which lacks the ability to shut off all flow of fuel to the engine. A secondary valve comensates for the inability of the flapper valve and shuts off the fuel flow when... | 10/03/1978 |
| 4098285 | Device for regulating the differential pressure between two different pressure points of a fluid circuit The device comprises a case in which there are provided an inlet orifice connected to the first point of pressure, a fluid return orifice and a passage of variable section interposed between these orifices. A slide valve member is movably mounted in the c... | 07/04/1978 |
| 4039637 | Fuel supply systems for heat generators A fuel supply system for a heat generator comprises means for spraying fuel into an air inlet tube, which means are branched off a fuel supply line supplied by a pump having a fuel delivery greater than the fuel comsumption rate of the generator. The fuel... | 08/02/1977 |
| 4033371 | Proportioning valve for volumetric proportioning of flow A proportioning valve is provided for volumetric proportioning of flow in an influent fluid line of the valve between two effluent fluid lines of the valve, particularly adapted for use in sensing main flow and adjusting purge flow in proportion to main f... | 07/05/1977 |
| 3980095 | Power transmission A combined unloading, relief, and load compensating valve has a poppet controlling flow between an inlet and an outlet and is spring biased to closed position. The poppet has a piston slidable in a cylindrical chamber in which the hydraulic pressure may b... | 09/14/1976 |
| 3965921 | Controlled opening pressure compensated flow control valve A flow control valve for use in a hydraulic system including a variable orifice for creating a pressure drop to control the rate of fluid flow to a fluid pressure operated device. A pressure compensating device incorporated in the valve is responsive to d... | 06/29/1976 |
