Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 7415989 | Spool activated lock-out valve for a hydraulic actuator load check valve A check valve system controls the flow of fluid between a spool valve and a hydraulic actuator and includes a pilot operated check valve that is controlled by a lock-out valve. The check valve has a poppet that engages and disengages a first valve seat in response t... | 08/26/2008 |
| 7278447 | Co-axial solenoid actuator An actuator assembly comprised of: a first coil and a second coil, each with a bore and a producing a magnetic flux when subject to an electric signal; a tube extending through the bores such that coils are coaxial; a magnetic pole piece within the tube and generall... | 10/09/2007 |
| 7246787 | Solenoid valve assembly A valve assembly comprised of a solenoid coil, having a coil bore, and being operative to produce a magnetic field when subject to an electric signal, a fixed magnetic pole piece within the coil bore, a generally cylindrically and axially translatable armature with ... | 07/24/2007 |
| 7131453 | Hydraulic valve device and method for assembling the same An option valve for controlling the operation of an option actuator added as an option is installed into each of first and second main valve blocks in each of which plural control valves, a pressure oil supply line connected to a pump and a tank line connected to a ... | 11/07/2006 |
| 7104283 | Normally open hydraulic control valve A normally open hydraulic control valve includes: a linear solenoid unit; a spool driven by an output force of the linear solenoid unit to move forward; a valve body in which the spool is fitted; and a return spring for biasing the spool in a retreating direction. T... | 09/12/2006 |
| 7089957 | Redundant valve system The redundant valve system 10 of the preferred embodiment includes a first valve unit 12 and a second valve unit 14. The redundant valve system 10 is preferably used to connect a source 16 to a destination 18 and to connect ... | 08/15/2006 |
| 7055317 | Hydraulic module The invention relates to a new type of hydraulic module for actuating at least one hydraulic control element with a hydraulic pump in a housing, with an electric motor fastened to a first housing side for driving the pump, with a tank located on a second housing sid... | 06/06/2006 |
| 6964281 | Multiple hydraulic spool valve assembly with a monolithic body An assembly of a plurality of hydraulic control valves is housed in a single-piece body. For each control valve, a spool bore and an aperture for a pressure compensation valve are provided in the monolithic body. Each spool bore is connected to several return passag... | 11/15/2005 |
| 6694859 | Variable pressure relief valve A single stage, electrically controlled variable pressure relief valve assembly is provided that uses a valving element assembly slideably disposed within a housing having first and second inlet and outlet ports, the valving element assembly has a differe... | 02/24/2004 |
| 6502600 | Hydraulic line connection The invention concerns a hydraulic line connection with a supply connection (2) having a pressure line and a return line, each ending at a connection valve (4,5), and with a safety valve (8) in a line between the pressure line and a consumer (1), said saf... | 01/07/2003 |
| 6470912 | Dual-spool hydraulic directional valve A dual-spool hydraulic directional valve for controlling the motion of a hydraulic cylinder or similar device. The dual-spool hydraulic directional valve of the present invention is less costly to manufacture, may be more easily repaired, and is more resi... | 10/29/2002 |
| 6394130 | Control valve device A control valve device controls the movement of at least one hydraulic user. Relative movement of a control spool valve of a control valve with respect to a housing controls the connection of at least one hydraulic connection that is in communication with... | 05/28/2002 |
| 6311947 | Valve assembly An on/off valve (O/OV) and directional valves (DV1, DV2) are packaged with a switching valve system (10) in a housing assembly (156, 157, 158, 160). The on/off valve (O/OV) is operated by a control handle (154) that is located at one end of the housing as... | 11/06/2001 |
| 6209580 | Multifunction valve assembly An on/off valve (O/OV) and directional valves (DV1, DV2) are packaged with a switching valve system (10) in a housing assembly (156, 157, 158, 160). The on/off valve (O/OV) is operated by a control handle (154) that is located at one end of the housing as... | 04/03/2001 |
| 6119727 | Pneumatic seat valve having a rapid exhaust mode A pneumatic valve (10) for use in a pneumatic seat (12) of a vehicle is disclosed. The pneumatic valve includes an upper housing (32) and a lower housing (38). The lower housing is slidably received within the upper housing. The lower housing has an upper... | 09/19/2000 |
| 5755260 | Mono-block control valve with regeneration conduit A mono-block control valve having a regeneration conduit is disclosed. The regeneration conduit does not enlarge the valve body. The control valve has a bypass conduit formed in either side of the valve body. The bypass conduit is opened to return the pre... | 05/26/1998 |
| 5701933 | Hydraulic control system having a bypass valve A hydraulic control system has a closed center control valve disposed to control flow of pressurized fluid from a pump to an actuator and a bypass valve disposed to control fluid flow through a bypass line connecting the pump to a reservoir. A controller ... | 12/30/1997 |
| 5664477 | Control system for a hydraulic circuit A control system is provided for use in a hydraulic system to provide a simple arrangement with a limited number of elements that bypasses the system flow in the event of an electrical malfunction in the system and further allows other hydraulic circuits ... | 09/09/1997 |
| 5606901 | Hydraulic circuit for turning purposes A turning-purpose hydraulic circuit characterized in that a discharge passage (20a) of a hydraulic pump (20) is connected to a variable relief valve (21) and a pump port of a directional switching valve (22); a first actuator port and a second actuator po... | 03/04/1997 |
| 5515879 | Load sensed multi-purpose pressure control valve A pressure control valve having a housing with a main inlet passage and a bypass outlet passage. A combined control is located in the housing to control the flow of fluid from the main inlet passage to the bypass outlet passage. The combined control inclu... | 05/14/1996 |
| 5333454 | Flow control valve unit A connector 5 having an outlet 4 for delivering a pressure oil to a power steering apparatus PS is secured in an opening of a valve receiving bore 2 in which a flow controlling spool valve 3 is received. The connector 5 includes an axial bore 5a which con... | 08/02/1994 |
| 5090726 | Suspension control system A suspension control system for controlling the attitude of a vehicle has a hydraulic fluid supply source mechanism connected to a suspension unit of the vehicle through a hydraulic fluid supplying and discharging device for controlling the supply and dis... | 02/25/1992 |
| 5069301 | Vehicle power assisted steering system A vehicle power assisted steering system comprises a hydraulic pump 24 having a constant volume output communicating with an open center power assistance valve 40 which is adjustable from a neutral condition in response to a steering input torque during a... | 12/03/1991 |
| 5065784 | Valve assemblies and means An hydraulic valve assembly controls the supply of hydraulic fluid to an hydraulic strut of a vehicle suspension and is formed in a valve block having an hydraulic delivery line between a pump delivery port and the strut via a check valve which allows flo... | 11/19/1991 |
| 5020570 | Combined valve modular control panel A valve modular control panel having a gas supply module at one end of a row of valve modules and a bleed module at the other end. Each valve module is individually controlled by its own valve mechanism. Gas under pressure is suppled to all of the valve m... | 06/04/1991 |
| 4982803 | Modulator and power-assisted steering circuit comprising such a modulator The modulator is intended, under the control of a solenoid valve, for diverting a flow of fluid under high pressure from the fluid supply circuit of a hydraulic motor. The solenoid valve is a progressively acting solenoid valve, the shutter (70) of which ... | 01/08/1991 |
| 4964433 | Rotary valve The improved rotary valve includes a body and a valving block having a valve interface with at least two work ports. A rotatable valve plate is received in the body and has a working face with a land which is in sliding contact with the valve interface. A... | 10/23/1990 |
| 4909279 | Fluid control valve In a fluid control valve, a check valve is provided between the pump port and the first fluid chamber and allows the fluid to pass therethrough only in a direction from the pump port to the first fluid chamber, a down control valve is provided between the... | 03/20/1990 |
| 4895182 | Hydraulic control unit A hydraulic control unit, particularly for switching-over a boat reversing gear comprises a pump unit (2) fed by a tank (5), a switchable rotary slide valve combination (8) connecting two control junctions (A, B) either to the working pressure system or t... | 01/23/1990 |
| 4879944 | Hydraulic control valve A hydraulic valve is adapted to be connected between a pressurized supply line and first and second lines feeding respective first and second circuits with different functions, such as the steering and braking functions of an automobile vehicle. It compri... | 11/14/1989 |
| 4865079 | High pressure hydraulic flow control valve A high pressure hydraulic flow control valve is formed with a spool which is capable of operating as a conventional spool to control the flow of fluid from an input port to an output port or to a return port. The spool also provides overload protection wh... | 09/12/1989 |
| 4860635 | Steering control valve for variable power assist steering system A steering control valve for a power steering system for a vehicle includes a valve structure which defines a plurality of variable flow orifices as steering input torque is applied thereby creating pressure differential acting on fluid motor. A solenoid ... | 08/29/1989 |
| 4858651 | Control valve for construction equipment A control valve for construction equipment adapted to operate a control mechanism in which a central by-pass passage is provided with a pilot pressure generating mechanism such as an orifice or the like and which is adapted to generate a pilot pressure du... | 08/22/1989 |
| 4852462 | Operating noise-free fluid flow distributor circuit for variable assist power steering system A power assist steering system comprises a control valve which defines a fluid flow distributor circuit which includes two parallel first and second fluid flow paths connected between the hydraulic fluid source and the fluid reservoir. Inflow control vari... | 08/01/1989 |
| 4825909 | High pressure hydraulic flow control valve A high pressure hydraulic flow control valve is formed with a spool which is capable of operating as a conventional spool to control the flow of fluid from an input port to an output port or to a return port. The spool also provides overload protection wh... | 05/02/1989 |
| 4738278 | Hydraulic control device A hydraulic control device consists of a housing, a control slide valve displaceable in a bore of the housing, and a control ring. Axial displacement of the control slide valve makes it possible to connect together or to disconnect various connecting line... | 04/19/1988 |
| 4730543 | Closed center hydraulic valve control system for aerial lift Apparatus for controlling operation of an aerial lift having a boom. A hydraulic fluid pump is connected to a hydraulic cylinder, and the control arrangement controls the supply of hydraulic fluid from the hydraulic fluid pump to the cylinder and controls... | 03/15/1988 |
| 4708601 | Dual diaphragm pump A pneumatically operated reciprocating three-way valve having particular application to a double diaphragm pump. The valve is operative without a lubricating oil mist or the inefficiency resulting from air leakage between the valve piston and cylinder. St... | 11/24/1987 |
| 4691618 | Hydraulic control valve A hydraulic control valve having a valve housing including a cylindrical valve bore, the valve bore being in communication with a supply port, a discharge port and first and second delivery ports each with first and second openings to the valve bore. A va... | 09/08/1987 |
| 4672885 | Servo device for controlling flow in a hydraulic installation, particularly for the assisted steering of a vehicle The servo device for controlling flow (10) situated in a branch hydraulic line (6), incorporates in a body (11) an inlet passage (12) and an outlet passage (9) connected by an intermediate passage (13) forming a seat (14) for a valve component (15) which ... | 06/16/1987 |
