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| Number | Title | Issue Date |
| 7327045 | Fuel delivery system and method providing regulated electrical output In a mobile fuel delivery vehicle, providing bulk aircraft fuel from a pressurized fuel reservoir to an aircraft, a method of regulating electrical output of an electrical power source, includes the steps of: (a) receiving, in a fluid path, the bulk aircraft fuel fr... | 02/05/2008 |
| 7204266 | Pilot-operated pressure shut-off valve A pilot-operated pressure shut-off valve having a main control piston which, when an upper system limit pressure in the hydraulic system is reached, connects an inlet, via which pressure medium can be fed to a hydraulic system, to an outlet by taking up a first swit... | 04/17/2007 |
| 7069674 | Hydraulic circuit for backhoe A hydraulic circuit for use with a backhoe includes first, second and third pumps; left and right traveling unit valve sections-receiving pressure oil from the first and second pumps independently of each other; a front implement valve section receiving combined pre... | 07/04/2006 |
| 6966365 | Outflow prevention device To provide an outflow prevention device which is capable of preventing refrigerant from flowing out into a vehicle compartment even when an evaporator has ruptured. The outflow prevention device comprises a shut valve arranged in a passage via which refrigera... | 11/22/2005 |
| 6925916 | Two stage punch press actuator with output drive shaft position sensing A press for forming a workpiece with a tooling set includes an actuator assembly carrying a movable half or punch of the tooling set and having a two phase operation. In the first phase the actuator provides relatively low force in moving the punch to an intermediat... | 08/09/2005 |
| 6289919 | Pressure regulating valve with integral damping A valve (20B) is provided is provided for regulating the pressure differential between a high pressure side (16) and a low pressure side (18) of a fluid system component (14). The valve (20B) utilizes a damping washer (60) to restrict the flow of fluid fr... | 09/18/2001 |
| 6178998 | Reverse flow prevention apparatus A reverse flow prevention apparatus is provided so as to drastically decrease pressure loss without installing an independent pressure regulator mechanism therein. With the reverse flow prevention apparatus, a flow path running along a straight line is pr... | 01/30/2001 |
| 6079436 | Energy supply device for a compressed air brake system for commercial vehicles The energy supply device has a compressor for supplying at least one compressed air consumer. On the outlet end, the compressor communicates with a pneumatically controllable outlet valve. Furthermore, two pressure regulating valves are provided, with whi... | 06/27/2000 |
| 6053195 | Pressure control valve The present invention relates to a pressure control valve for regulating the oil pressure in an oil supply system preferably of an internal combustion engine, with a first working chamber which is in connection with an oil line, with a second working cham... | 04/25/2000 |
| 5957148 | Valve system having a deadman controlled actuating member in a vented chamber A main valve receives fluid at an inlet and transmits the fluid to an outlet. The main valve has a rear face. A surge control servo valve responds to a load sense signal and moves between a closed position and an open position in which the fluid is transm... | 09/28/1999 |
| 5850844 | Pressure reduction valve A pressure reduction valve for reducing the pressure in double-acting, closed hydraulic systems when they are not attended. The valve comprises a valve housing (1) with a boring (6), whose ends communicate with the respective circuits, and wherein there a... | 12/22/1998 |
| 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 |
| 4844114 | Pressure-drop sensor valve There is disclosed a pressure-drop sensor valve system for controlling the movement of a fluid operated, ram-type device, such as that used to drive a panel punch. The valve-like device includes a main passage having an inlet for pressurized fluid and an ... | 07/04/1989 |
| 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 |
| 4827966 | Pressure equilibrator for gases A pressure equilibrator has a slider received slidably in a pressure accumulation chamber and partitioning the chamber into two opposing sections, and a relief port formed in the inner side surface of the chamber. The slider is inserted into the pressure ... | 05/09/1989 |
| 4825751 | Controlled bypass and flow-control valve unit for hydraulic power steering system The device comprises a pilot slide (27) controlled by a pressure differential (P-P') determined by an electromagnetic pilot valve element (43) located in a return circuit to a tank (7) which is common to both the hydraulic installation and a branch pipe (... | 05/02/1989 |
| 4742841 | Water shut-off valve A coolant system and control valve used in a circuit for cooling spot welding tips. The control valve normally passes coolant to and from the tips. Should a break in the coolant flow occur because of a breakdown of one or more of the tips, the control val... | 05/10/1988 |
| 4625749 | Pressure supply device for a hydraulic system The invention relates to apparatus for supplying a pressurized fluid to a hydraulic system. The apparatus has a diverting path in parallel with the main supply line which is designed and is operable to minimize the inherent losses associated with such a d... | 12/02/1986 |
| 4559965 | Multiple compensating unloading valve circuit A multiple compensating unloading valve circuit including multiple fixed displacement pumps and corresponding compensator unloading valves which are phased so that one pump supplies the fluid demand for the circuit until the demand exceeds that pump's cap... | 12/24/1985 |
| 4552169 | Device for regulating the pressure of a fluid supplied to a feeding circuit from a fluid source This device comprises a pressure controller connected to a fluid source through a first calibrated aperture. The pressure controller controls a valve located in a by-pass circuit connected in parallel with a utilization circuit, and is provided with a sec... | 11/12/1985 |
| 4481968 | Regulator-unloader for high pressure spraying equipment A regulator-unloader for fluid systems comprising, in a housing; an inlet passageway; an outlet passageway connected to said inlet passageway; a piston movable within said outlet passageway; an outlet valve connected to said inlet passageway and to said o... | 11/13/1984 |
| 4420010 | In-line back flow preventer A device for preventing the back flow of water from a point of use into a water supply line. The device includes a unitary casing having an inlet, a central chamber, an outlet, a removal port and a drain vent opening. The inlet, the central chamber and th... | 12/13/1983 |
| 4418535 | Device for regulating the pressure of a fluid supplied to a feeding circuit from a fluid source This device comprises a manometric gauge connected to a fluid source through a first calibrated aperture. The manometric gauge controls a valve located in a by-pass circuit connected in parallel with a utilization circuit, and is provided with a second ca... | 12/06/1983 |
| 4403627 | Buffer valve A buffer valve or compensator for use in a margarine mold system to permit continuous operation of a positive discharge pump in the system, such valve including a valve housing connected to a conduit section for a flow line on the discharge side of the pu... | 09/13/1983 |
| 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 |
| 4237918 | Unloader and check valve A combined unloader and check valve for use with a motor driven air compressor (70) in which pressure trapped in the compressor head when the compressor is shut down is unloaded by means of an unloaded valve element (44) which opens a port (26) to unload ... | 12/09/1980 |
| 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 |
| 4178953 | Fail safe bypass valve A diaphragm operated valve includes a valve body having inlet, outlet and bypass ports in it. A diaphragm assembly includes a flexible diaphragm and a valve stem. The valve stem has a main valve member attached to it which is movable with the diaphragm as... | 12/18/1979 |
| 4139015 | Hydraulic pressure control device for use in automatic transmission A hydraulic pressure control device for use, for example, in an automatic transmission, in which a line pressure to be supplied from a hydraulic pressure source to a hydraulic pressure servo-device is controlled in three stages by means of a main spool wh... | 02/13/1979 |
| 4114637 | Variable differential pressure unloading valve apparatus Variable differential pressure control apparatus is used in a hydraulic system including a pump, an accumulator for receiving hydraulic fluid under pressure from the pump and for discharging hydraulic fluid to a work device, and an unloading valve in the ... | 09/19/1978 |
| 4062374 | Hydraulic valves and hydraulic systems A combined compensator and off-loading valve comprising a system pressure gallery connected to a tank or low pressure gallery by a plunger valve, the plunger having a greater area than the valve seating, this differential area being exposed in operation t... | 12/13/1977 |
| 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 |
| 4016898 | Means for suppressing cavitation in a high pressure relief valve The suppression of bubble formation and cavitation in the fluid passing through a high pressure relief valve is achieved by a back pressure valve in the relief valve discharge line. The back pressure valve has differential area pistons which maintain a ba... | 04/12/1977 |
| 4007756 | Air control apparatus for an engine exhaust gas purification system An exhaust gas purifying apparatus for an engine, such as a thermal reactor or catalytic converter, is supplied secondary air through a secondary air control valve which is controlled by a combination of a first and a second differential pressure respondi... | 02/15/1977 |
