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"That the automobile has practically reached the limit of its development is suggested by the fact that during the past year no improvements of a radical nature have been introduced."
Scientific American ; Jan. 2 edition, 1909
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| Number | Title | Issue Date |
| 8156962 | Microvalve device A microvalve device for controlling fluid flow includes a body defining a chamber having first and second ends. The first end is in communication with a source of command pressure. The second end in communication with a source of load pressure. A micromachined spool... | 04/17/2012 |
| 8011387 | Pressure control device for heavy equipment A pressure control valve for heavy equipment. The pressure control valve can smoothly operate a working device having a high load pressure by limiting a supply of hydraulic fluid to a working device having a low load pressure in the case of simultaneously operating ... | 09/06/2011 |
| 7909060 | Pressure control valve A pressure control valve includes a sleeve on which an input port, an output port, and drain ports are formed; and a linear solenoid portion for generating thrust. The pressure control valve further includes a first spool, which advances and retreats within the slee... | 03/22/2011 |
| 7237470 | Fluid power unit having closed circuit A fluid power unit has a cylinder in a housing, a piston slidable in the cylinder and dividing the cylinder into a retract side and an extend side, and a two-position control valve. The control valve has a spool and first and second pilots. The position of the spool... | 07/03/2007 |
| 7108012 | Fluid control valve A fluid control valve for the mixing of hot and cold water and delivery at a selected flow rate is described wherein an upper housing and lower housing are clamped together by a snap-fit connection thereby enclosing other fluid control valve component parts. A ball ... | 09/19/2006 |
| 7104282 | Two stage solenoid control valve A two stage solenoid control valve is described. The control valve opens and closes using a single source of pressurized fluid. This source of pressurized fluid may be transmitted through the solenoid control valve and on to a downstream valve such as a bleed valve ... | 09/12/2006 |
| 7051995 | Device for generating a reciprocating movement, valve arrangement therefore and pheumatic tool A pressure-fluid driven device for generating a reciprocating movement includes a first (5) and a second relatively movable part (3), wherein a working chamber (7) is intended to be alternatively pressurised and depressurised so as to drive the ... | 05/30/2006 |
| 7032272 | Friction hinge A motion control device for controlling the movement of an operational member about a first axis and about a second axis includes a spindle having a socket and a control arm wherein the socket defines a first axis opening. The device includes a cylindrical pivot mem... | 04/25/2006 |
| 6983623 | Valve block assembly for I.S. glassware machine and modular pilot valve operated poppet valve assembly A valve block assembly includes a cartridge block and a plurality of modular pilot valve operated poppet valve assemblies. The cartridge block has a plurality of bores therein dimensioned and configured for receiving respective modular pilot valve operated poppet va... | 01/10/2006 |
| 6957664 | Pilot control valve The present invention relates to a pilot control valve, especially for use in mining hydraulics. The valve has a valve insert constructed as a valve cartridge, whose single or multipart valve housing has an input entry 17 for pressure fluid P, a connection op... | 10/25/2005 |
| 6920899 | Fluid control valve A fluid control valve for controlling the delivery of water includes a control lever that is movable in two directions by rotation of the lever about two independent axes. The fluid control valve includes a valve body assembly with flow passageways and a housing ass... | 07/26/2005 |
| 6766828 | Interlock valve An interlock valve is formed by incorporating a main valve portion having a valve member into a first casing, incorporating a driving-side operating portion 2 having a driving piston for driving the valve member into a first end plate, incorporating a return-... | 07/27/2004 |
| 6755761 | Microvalve for electronically controlled transmission A microvalve device for controlling fluid flow in a fluid circuit. The microvalve device comprises a body having a cavity formed therein. An electronically controlled automatic transmission, comprising of an input shaft; an output shaft; a plurality of gears providi... | 06/29/2004 |
| 6494804 | Microvalve for electronically controlled transmission A microvalve device for controlling fluid flow in a fluid circuit. The microvalve device comprises a body having a cavity formed therein. An electronically controlled automatic transmission, comprising of an input shaft; an output shaft; a plurality of ge... | 12/17/2002 |
| 6422254 | Hydraulic control cold start neutral valve A hydraulic neutral cold start control valve for a variable displacement hydraulic unit includes a housing with a spool bore and an intersecting signal pressure passage therein. A spool is disposed in the bore and is mechanically biased to a closed or neu... | 07/23/2002 |
| 6305419 | Variable pilot pressure control for pilot valves A hydraulically operated industrial machine has hydraulic work components such as a boom, bucket or the like, and also uses hydraulic motors for propelling the machine. The motors and cylinders are controlled by pilot pressure valves to provide pressure t... | 10/23/2001 |
| 6241487 | Fluid powered diaphragm pump A fluid powered diaphragm pump is provided which includes three means for supplementing the pilot valve signal to the main fluid valve spool. The means include a cross porting of the main fluid valve spool, or engineered orifices that communicate pressuri... | 06/05/2001 |
| 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 |
| 6186045 | Latching valve and a multiplexed hydraulic control system utilizing same A latching valve, useable in a multiplexed fluid control system, is switchable between two positions to control working output fluid flow to a corresponding actuator. The valve is latched by deriving a holding force from the working output flow. The latch... | 02/13/2001 |
| 6038957 | Control valves A hydraulic control valve (10; 110) which acts as a hydraulic flow amplifier. An obturator (34; 134) is slidable towards and away from a valve seat (36; 136) to controllably vary throughflow from an inlet (S; P) to an outlet (T; S). The obturator (34; 134... | 03/21/2000 |
| 5996627 | Adjustable fluid valve for diaphragm pumps A fluid diaphragm pump is provided with a means for controlling the flowrate of fluid to the main fluid valve. Specifically, in the main fluid valve, a sleeve accommodates a sliding spool. The sleeve may include control orifices disposed at either end of ... | 12/07/1999 |
| 5975139 | Servo control valve for a hydraulically-actuated device A servo control valve includes a valve body that defines a high pressure passage, a low pressure passage and a flow passage. A valve member has a first pressure surface in opposition to a control pressure surface. The valve member is positioned in the val... | 11/02/1999 |
| 5743297 | Detent arrangement for holding hydraulic valve member stroked A hydraulic pilot valve has a joystick which is normally maintained in a neutral position by coil springs acting on plungers which engage corresponding first cam surfaces of a cam fixed to the joystick. The plungers are each connected to respective valve ... | 04/28/1998 |
| 5683071 | Apparatus for controlling selectively engageable detents in a pilot controller A pilot hydraulic system controller including a pilot controller valve for controlling the flow of hydraulic fluid to actuate a primary hydraulic system valve, a pilot controller lockout valve, and a detent control circuit for selectively energizing a det... | 11/04/1997 |
| 5638866 | Detent arrangement for holding hydraulic valve members stroked A hydraulic pilot valve has a joystick which is normally maintained in a neutral position by coil springs acting on plungers which engage corresponding first cam surfaces of a cam fixed to the joystick. The plungers are each connected to respective valve ... | 06/17/1997 |
| 5494075 | Hydraulic time delay valve A hydraulic time delay valve includes a hydraulic timer valve having a valve pressure port, a valve return port, a valve cylinder port and a porting device for porting hydraulic fluid from the valve pressure port to the valve cylinder port. A cylinder is ... | 02/27/1996 |
| 5353686 | Hydraulic circuit for four-position closed-center selector valve controlled by pressure proportional control valve A hydraulic circuit, having a four-position closed-center valve (6) controlled by a proportional control valve (22), can facilitate the vertical position control and operating speed control of a blade with a simple structure, while providing that the floa... | 10/11/1994 |
| 5313983 | Remote hydraulic control systems Response times for a remote hydraulic control system having control lines from a remote controller to a main control valve of 50 feet or more are reduced by providing actuator pistons which are operated at a second pilot hydraulic pressure less than a fir... | 05/24/1994 |
| 5279121 | Flow control valve with pilot operation and pressure compensation A pilot-actuated, pressure-compensated flow and directional control valve assembly (11) is provided in which a main valve spool (95) is positioned in response to a pressure differential between a pilot chamber (119) and a reaction chamber (117). Flow of f... | 01/18/1994 |
| 5253808 | Power assisted dump valve A power assisted dump valve for a high pressure nozzle system. The dump valve is formed from a unitary housing or valve body. A valve chamber in the valve body includes a slidable piston which, in a first position, closes an atmospheric channel and allows... | 10/19/1993 |
| 5172726 | Pressure regulator The pressure regulator comprises a valve with a slide member (5) whose displacements are controlled by the pressure prevailing in the control chamber (7). This pressure is adjusted by an obturator (11) of tubular shape which, in its upper position, places... | 12/22/1992 |
| 5136898 | Hydraulic system for controlling engagement of frictional coupling in automatic transmission In order to improve only a pressure variation characteristic of hydraulic fluid supplied to a hydraulically actuable frictional coupling, but also a pressure variation characteristic thereof discharged from the coupling, a pressure regulator valve is prov... | 08/11/1992 |
| 5129500 | Control valve for timed clutch engagement A control valve assembly has a multi-land spool valve slidably disposed in a stepped valve bore. One end of the spool valve has disposed adjacent thereto a control chamber in which a control signal pressure is selectively applied while the other end has a... | 07/14/1992 |
| 5117868 | Pilot-controlled directional valve Pilot-controlled directional valve having two positions, an admitting position and a closing position for a hydraulic user device, such closing position can be obtained independently from the presence of a supplied hydraulic pressure.... | 06/02/1992 |
| 5095806 | Device in a hydraulic power system connected to a load driving hydraulic motor Device in a hydraulic power system connected to load driving hydraulic motor (18; 32), comprising a pilot controlled flow regulating directional valve (1; 29) for alternative connection of the service ports of the motor (18; 32) to a pressure medium sourc... | 03/17/1992 |
| 5081905 | Hydraulic pilot operation circuit and valve for quickly discharging oil A hydraulic control valve is controlled and changed over by a hydraulic pressure output from a remote control valve. A change-over valve is provided between an output port of the remote control valve and a pilot port of the hydraulic control valve. The ch... | 01/21/1992 |
| 5056561 | Remote controlled, individually pressure compensated valve A remote controlled individually pressure compensated hydraulic valve assembly includes a directional valve having an inlet, a load holding check valve, an outlet passage, at least one outlet or cylinder port, and a tank or drain port. The valve defines a... | 10/15/1991 |
| 5038825 | Multiport valve In a hydraulically operated multiport valve having a floating position for connecting the cylinder chambers of a hydraulic piston-cylinder drive, a valve slide and a restraining piston associated with it are provided. By means of a respective dimensioning... | 08/13/1991 |
| 5022359 | Actuator with energy recovery return An electronically controlled actuator which compresses a fluid thereby storing potential energy as it transitions from a first to a second position is disclosed. The compressed fluid exerts a high force on the actuator and the potential energy is recovere... | 06/11/1991 |
| 4966196 | Balanced servo-operated multiway valve A servo-operated multiway valve is disclosed which can be optionally used as both a pressurization valve and a ventilation valve for use with a fluid consuming device. The valve utilizes a valve body to allow fluid communication alternatively between two ... | 10/30/1990 |
