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 |
| 7209806 | Self-contained electronic pressure monitoring and shutdown device The invention is a self-contained process shutdown device that detects abnormal pressures and initiates shutdown by removing the pneumatic or hydraulic pressure needed for a given process or flow to continue. The process' pressure is detected by means of a switch-ga... | 04/24/2007 |
| 7044431 | Electromagnetically actuated valve system and valve device The invention relates to a valve system comprising a housing, an actuator, a main valve disposed between an inlet chamber and an outlet chamber, and a pilot chamber. Said pilot chamber is linked with the outlet chamber via a main valve, comprising at least one pilot... | 05/16/2006 |
| 6722258 | Dual cylinder circuit having a joystick with intuitive control A joystick controller is provided in a hydraulic circuit having a pair of hydraulic actuators and oriented with respect to the operator so that movement of a control lever of the joystick controller relative to a reference axis oriented perpendicular to the operator... | 04/20/2004 |
| 6595104 | Pilot control for a hoist and balancing apparatus An actuator assembly has a first and second pilot valve. Each valve has inlets in communication with a fluid supply source and outlets in communication with the control valve. An in-line actuator housing disposed between the fluid powered device and a low... | 07/22/2003 |
| 6546957 | Dual cylinder circuit having a joystick with intuitive control A joystick controller is provided in a hydraulic circuit having a pair of hydraulic actuators and oriented with respect to the operator so that movement of a control lever of the joystick controller relative to a reference axis oriented perpendicular to t... | 04/15/2003 |
| 6497246 | Pneumatic snap pilot A snap pilot used to pneumatically energize and de-energize a control device, such as a valve. The pilot has two valves--one to admit pilot pressure, and one to exhaust pressure. The pilot incorporates valves having an elastomeric seal but maintaining the... | 12/24/2002 |
| 6408876 | Control valve It is an object of the present invention to provide a control valve which can reduce the number of external lines connected to a hydraulic remote control valve. A control valve 1 for controlling hydraulic cylinders 2,2' is provided, in one 26 of spool cov... | 06/25/2002 |
| 6308753 | System for loading and unloading fluid tanks containing hazardous fluids A system for transferring a hazardous fluid product from a transport tank (10) of a roadway vehicle (12) to a fixed storage tank (14). A flexible transfer hose assembly (30) has end couplings (34, 36) which are detachably connected between the transport t... | 10/30/2001 |
| 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 |
| 6192936 | Hydraulic control means A hydraulic remote control (HRC) valve including a main spool valve and a pilot pressure control valve. A lever is operatively connected to the pilot valve whereby to provide "finger tip" control of the main spool valve. The HRC has an inverting output, w... | 02/27/2001 |
| 6102362 | Gas motor actuator A gas motor actuator is provided for opening or closing an actuated valve, such as a pipeline valve, using power gas, which is a gas under pressure. The gas motor actuator includes a gas turbine motor, a high-volume shuttle valve coupled to the gas turbin... | 08/15/2000 |
| 6062260 | Dual piston pilot valve A dual piston pilot valve includes a housing forming first and second cylinders. A first spool is moveable in the first cylinder for engaging the a piston to effect movement of the first piston and a second spool is moveable in the second cylinder for eng... | 05/16/2000 |
| 5918631 | Ball-poppet pneumatic control valve A pneumatic fluid control valve includes a valve body having a fluid inlet connectable to an external source of pressurized pneumatic working fluid, one or more load outlets, one or more corresponding exhaust ports, and a movable valve mechanism. The mova... | 07/06/1999 |
| 5865419 | Pneumatic actuator having an end mounted control device This invention features a device for controlling the operation of a pneumatic actuator and a pneumatic actuator having such a control device. More particularly, the actuator control device of the instant invention includes a housing mounted to an actuator... | 02/02/1999 |
| 5645263 | Pilot valve for a flow amplyifying poppet valve A flow amplifying poppet valve has a main poppet for controlling fluid flow from an inlet port to an outlet port of a main fluid passage. The position of the main poppet is controlled by controlling the pressure in a first control chamber adjacent the mai... | 07/08/1997 |
| 5613519 | Operating valve assembly with pressure compensation valve An operating valve assembly with a pressure compensation valve, comprises a spool for selectively establishing and blocking communication between a pump port, an output port and a main tank port, being disposed within a spool bore of a valve body, and a p... | 03/25/1997 |
| 5409038 | Hydraulic circuit including pressure compensating valve A hydraulic circuit including a pressure compensating valve, which aims at preventing the delay in operation of the valve due to the time required for the inflow of fluid in amount corresponding to stroke volume thereof, thereby improving the response of ... | 04/25/1995 |
| 5213133 | Pressure responsive pilot control valve A pressure responsive pilot control valve has a spool which is movable by a metal diaphragm sensing the pressure in a flowline. The spool includes two poppet seal rings mounted thereon, the poppet seal rings having concentric axes and which are used for o... | 05/25/1993 |
| 5207059 | Hydraulic control system having poppet and spool type valves Hydraulic control systems are useful for controlling actuation of hydraulic motors. Some such systems use spool type valves while other systems use poppet type valves, both of which have their advantages and disadvantages. The present hydraulic control sy... | 05/04/1993 |
| 5137254 | Pressure compensated flow amplifying poppet valve Flow amplifying poppet valves are useful in hydraulic circuits requiring low leakage when the circuit is in a load holding condition. Pressure compensation of the known flow amplifying poppet valves has not been totally successful and thus, the output flo... | 08/11/1992 |
| 5107753 | Automatic pressure control device for hydraulic actuator driving circuit An automatic pressure control device built in a hydraulic actuator driving circuit for driving a plurality of actuators of a construction machine or the like by a single hydraulic pump through respective pilot changeover valves is provided for automatical... | 04/28/1992 |
| 5083430 | Hydraulic driving apparatus A hydraulic driving apparatus has at least one hydraulic pump, a plurality of hydraulic actuators driven by hydraulic fluid discharged from the hydraulic pump, a tank to which return fluid from the plurality of hydraulic actuators is discharged, and a flo... | 01/28/1992 |
| 5067519 | Safety valve for fluid systems An improved safety valve includes piston-actuated provisions for gradually pressurizing a fluid-actuated motor during start-up of the system, preferably by way of a changeable flow restriction. In addition such improved safety valve preferably includes a ... | 11/26/1991 |
| 5044256 | Exhaust pressurizing control for a fluid system Fluid systems having fluid motors which control aiding type loads many times have problems with cavitation in one end of the fluid type motor during lowering thereof. It is desirable to eliminate all cavitation in the fluid motor during operation. In orde... | 09/03/1991 |
| 5024248 | Two-position and three-way valve The present invention provides a two-position and three-way valve system having a fluid supply port, a fluid inlet port and a fluid outlet port, the valve system being characterized by a first section connecting the fluid supply port with the fluid inlet ... | 06/18/1991 |
| 4945723 | Flow control valves for hydraulic motor system A hydraulic drive system has first and second flow control valves. Each of the control valves has a main valve of the seat valve type with a valve body for controlling communication between an inlet port and an outlet port which are both connected to a ma... | 08/07/1990 |
| 4938022 | Flow control system for hydraulic motors In a hydraulic drive system, first and second flow control valves means comprise each: a main valve having a valve body for controlling communication between an inlet port and an outlet port both connected to a main circuit, a variable restrictor capable ... | 07/03/1990 |
| 4875500 | Diaphragm type of pilot operated directional control valve A pilot operated directional control valve having a diaphragm held between a passage block which has a feeding port, at least one loading port and at least one discharge port, and an opposed control block which has pilot pressure passages. The ports of th... | 10/24/1989 |
| 4844127 | Actuating mechanism for a transmission control system An actuating mechanism for a hydraulic control system including a valve body having one or more valves slidably arranged therein. Each valve is movable along a linear path in a manner regulating fluid flow through the valve body as a function of the linea... | 07/04/1989 |
| 4838308 | Multipurpose control valve A three-port multipurpose pilot-operated vapor (air) or liquid (hydraulic) control valve with two semi-independent poppet segments which can be used for most basic control functions, including: two position (on-off), relief, pressure reducing and pressure... | 06/13/1989 |
| 4823834 | Diaphragm type of pilot operated directional control valve A pilot operated directional control valve having a diaphragm held between a passage block which has a feeding port, at least one loading port and at least one discharge port, and an opposed control block which has pilot pressure passages. The ports of th... | 04/25/1989 |
| 4799420 | Load responsive control system adapted to use of negative load pressure in operation of system controls A load responsive control system using on a selective basis the energy derived from a negative type load for operation of system controllers, which may be of various types, including electro-hydraulic multi-stage controls, for use in positioning of the ma... | 01/24/1989 |
| 4763691 | Hydraulic control valve A hydraulic control valve is disclosed which is adapted to independently control the flow of hydraulic fluid to several consumer lines. The control valve includes a housing having a central bore, a pair of axially spaced apart consumer lines comunicating ... | 08/16/1988 |
| 4748896 | Safety valve assembly A safety valve assembly for regulating the flow of a fluid under pressure to a fluid operated system e.g. a double acting cylinder element includes a housing with an inlet port, outlet ports and working ports and accommodating a pair of parallel valve spi... | 06/07/1988 |
| 4744388 | Diaphragm type of pilot operated directional control valve A pilot operated directional control valve having a diaphragm held between a passage block which has a feeding port, at least one loading port and at least one discharge port, and an opposed control block which has pilot pressure passages. The ports of th... | 05/17/1988 |
| 4729408 | Control system for independent control of fluid actuated devices Control systems are required to selectively control fluid actuated devices, such as clutches, in a transmission. In order to reduce shock loads on the internal elements of the transmission, it is necessary to ensure that only one clutch can be engaged at ... | 03/08/1988 |
| 4722362 | Pilot operated 3/2 poppet valve A 3/2 directional poppet valve is provided having a pilot poppet valve and a main valve. Said main valve comprises a housing having a longitudinal bore within which two 2/2 cartridge or logic valves are arranged in an axially opposite manner. A spool is p... | 02/02/1988 |
| 4671168 | Single actuator tandem brake pressure control valve Hydraulic assistance device, comprising a body (10) comprising a bore (12) in which a first piston mechanism and a second piston mechanism (18, 20) are slideably mounted, the first piston mechanism (18) being movable under the effect of the actuation of a... | 06/09/1987 |
| 4667572 | Valve arrangement A valve arrangement for a compressed-air operated nailing apparatus with valve pistons operating without intersection in such a manner that the one valve piston cooperates with the working cylinder and is guided by the other working piston which is contro... | 05/26/1987 |
| 4640311 | Modular system of distribution The invention relates to a system of distribution of a fluid under pressure for a driving device. The system comprises a main distributor D3 mounted on a base plate E3, and at least one auxiliary unit such as a progressive starter U | 02/03/1987 |
