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| Number | Title | Issue Date |
| 7267669 | Two site infusion apparatus An apparatus for use in delivering pain medication to separate locations from a single source of pressurized medication includes a valve housing, a cap, and a flexible diaphragm. The valve housing includes a first end and a second end and an inlet passage. The first... | 09/11/2007 |
| 6758234 | Pressure reducing valve A combined fluid pressure reducing and relief valve having aligned inlet and outlet connections, a pair of abutting rotary disc valve sets each having an inboard stationary and an outboard rotary ceramic disc which are relatively rotatable against each other to expo... | 07/06/2004 |
| 6629411 | Dual displacement motor control A hydraulically operated fan for a cooling system in an automotive vehicle. Two hydraulic motors drive a common fan shaft. A control system provides means to bypass flow in parallel with both motors or direct flow to both or one of the motors dependent on... | 10/07/2003 |
| 6382235 | Device for over-pressure protection for a storage tank A device for over-pressure protection of a tank has a main body defining a main passage with an inlet and an outlet. The main body also defines a release passage branched from the main passage. A shut-off mechanism is movably disposed within the main pass... | 05/07/2002 |
| 5732730 | Combined check valve and metering valve assembly A pressure-actuated valve of the type used in the fuel systems of gas turbine engines and the like combines the functions of check valve and metering valve in a housing forming a single assembly. A movable valve actuator is slidably movable along a centra... | 03/31/1998 |
| 5323799 | Fully mechanical pressure relief system A mechanical pressure relief system for a pressurized operating system which is suitable for high purity applications. The pressure relief system utilizes a mechanical logic switch, operable at a set point pressure, in conjunction with a pressurized actua... | 06/28/1994 |
| 5209255 | Accumulator loading valve An accumulator loading valve is provided which is adapted for elevated pressures, which requires but little space, and which has a pump connection (1), a reservoir connection (20), a priority valve (7) between the consumer connection and the accumulator c... | 05/11/1993 |
| 5058618 | Relief valve for hydraulic fluid The relief valve issued for controlling the pressure of a hydraulic fluid within a first duct 30 opening into a bore 14,16 provided in a body 10, a communication between the first duct 30 and a second duct 34 connecting a primary hydraulic circuit under p... | 10/22/1991 |
| 4921547 | Proportional priority flow regulator A proportional priority flow regulator valve structure comprising a cartridge-type modulated orifice valve element (MOS) in a composite multiple element valve assembly. The MOS valve operates in an hydraulic circuit to receive pressurized fluid from a sou... | 05/01/1990 |
| 4890636 | Fluid pressure control for use in transmission A fluid pressure control for a transmission having a fluid pressure operated clutch includes a pressure regulating piston communicating with a pressurized fluid source for affording fluid pressure to the clutch; a load piston disposed in a common bore wit... | 01/02/1990 |
| 4690620 | Variable radial piston pump A hydraulic arrangement has a housing which includes a first space of a definite first pressure and a second space with a lower second pressure. A primary pump supplies fluid under the first pressure into the first space to open the entrance ports into cy... | 09/01/1987 |
| 4620560 | Modulating relief valve with dual functioning load piston Fluid systems having modulating pressure relief valves ar normally needed in systems having clutches that require smooth engagement. It is also necessary in many systems to keep the sizes of components small to fit all of the necessary elements into a sma... | 11/04/1986 |
| 4570661 | Hydraulic fluid supply systems A pump 1 supplies hydraulic fluid from a reservoir 2 to hydraulically operated equipment 4 through a main flow line 3, the fluid being returned to the reservoir 2 through a return supply line 5. If the pump 1 should fail the equipment 4 may be supplied fr... | 02/18/1986 |
| 4498494 | Air control for a lumbar support device An air controlled valve assembly for a lumbar support device of the type having a plurality of parallel, horizontally disposed air bags located in the seat back of an automobile seat includes a hollow housing having a main air distribution chamber therein... | 02/12/1985 |
| 4410000 | Pressure control apparatus for at least two pressure vessels Every pressure vessel is connected by the agency of a connection channel to a control chamber. In both connection channels a shut-off valve is provided. The control chamber comprises a spring bellows whereby a spring counteracts a pressure force acting on... | 10/18/1983 |
| 4378816 | Hydraulic priority valve A hydraulic priority switch for preferential feeding of a low consumption primary loop in fluid communication with a hydraulic reservoir which is chargeable from a pressure medium source via a flow control means, against a non-preferential secondary loop ... | 04/05/1983 |
| 4291612 | Power brake system differential air pressure control valve assembly A power brake system has a brake booster operable by differential air pressure provided by a source of vacuum and a source of compressed air pressure. The differential air pressure control valve assembly of the invention maintains a substantially constant... | 09/29/1981 |
| 4276960 | Oil distributing means The invention comprises a novel oil distributing arrangement, employing a valve which has a plurality of responses, for use in a gas compressing system or the like. The valve has a plurality of ports for admitting oil thereinto from an oil pump via a cool... | 07/07/1981 |
| 4249558 | Bypass valve A bypass valve includes a valve body containing a spring loaded valve member. The valve body includes first and second interconnected bores respectively connected to the outlet and inlet of a fluid pump feeding a fluid function. A valve member slidably di... | 02/10/1981 |
| 4228818 | Crossover relief valve A crossover relief valve for use in a hydraulic circuit connected to two single acting cylinders such as used to provide rearward force against opposite ends of a plow blade wherein excessive pressure against one end of the blade will allow fluid to flow ... | 10/21/1980 |
| 4171004 | Safety regulator for fluid pressure This safety device has a delivery outlet and a pressure-relief valve for venting gas from a source of gas when the gas pressure rises above a predetermined maximum. A delivery line supplies gas from the source to a place of use, and there is a delivery li... | 10/16/1979 |
| 4040439 | Cushion valve arrangement A cushion valve arrangement for reducing the rate of pressure build up and relieving pressure rebounds in a fluid conduit. The valve housing defines first and second fluid ports, a fluid passage communicating therebetween, and a cushion passage communicat... | 08/09/1977 |
| 3983894 | Fluid valves There is disclosed a family of check and/or pressure relief fluid valves utilizing a spring biased annular diaphragm element for valving. In a single-function form there is disclosed a simple check valve. In a dual-function form there is disclosed a check... | 10/05/1976 |
