| Patents for F15B 21 - Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass (10,959) |
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| 08/18/1994 | WO1994018459A1 Hydraulic unit |
| 08/16/1994 | CA2038112C Charge flow priority circuit |
| 08/11/1994 | DE4303694A1 Liquids filter with overflow valve |
| 08/11/1994 | DE4303243A1 Verfahren zum Abgleich der Kennlinien von stufenlos verstellbaren Getrieben eines Fahrzeugs mit beidseitigem Fahrantrieb Method for comparing the characteristics of continuously variable transmissions of a vehicle with two-sided drive system |
| 08/11/1994 | DE4303240A1 Method for regulating pressure in hydrostatic drive systems |
| 08/03/1994 | EP0608245A1 Electro-pneumatic control device. |
| 08/03/1994 | CN2173320Y Return oil damping type oil suction filter |
| 07/26/1994 | US5331884 Fluid cylinder with cooling passages |
| 07/13/1994 | CN2171402Y Filter of special pollution alarm device |
| 07/05/1994 | CA1330555C Damping arrangement for damping the oscillations of valves controlled by pressure fluid |
| 06/30/1994 | DE4342747A1 Hydraulic control circuit for railway rolling stock |
| 06/28/1994 | US5323799 Fully mechanical pressure relief system |
| 06/28/1994 | US5323687 For a backhoe loader |
| 06/23/1994 | WO1994013524A1 Controlled proportional valve |
| 06/22/1994 | EP0602062A1 Process for separating gaseous components from pourable media and device and installation therefor. |
| 06/22/1994 | CN2169468Y Precision hydraulic filter |
| 06/14/1994 | US5319932 Power sensing regenerator |
| 06/08/1994 | CN2167766Y Through-type oil filter |
| 06/07/1994 | US5317876 Sound wave operated energy corverter for producing different forms of movement |
| 06/07/1994 | US5317872 Device for improvement of running condition in hydraulic system |
| 06/07/1994 | US5317871 Circuit capable of varying pump discharge volume in closed center-load sensing system |
| 05/31/1994 | US5316038 Fluid distribution device |
| 05/26/1994 | WO1994011640A1 Magnetorheological valve and devices incorporating magnetorheological elements |
| 05/26/1994 | DE4238998A1 Hydrostatic drive for car auxiliaries - has parallel hydromotor circuits for fan and generator with electronic control of pressurised fluid supply from pump |
| 05/25/1994 | CN2166272Y Oil pressure return regulating apparatus for oil pressure cylinder |
| 05/24/1994 | US5314305 Compressed air vibrator with turbine drive |
| 05/24/1994 | US5313983 Remote hydraulic control systems |
| 05/18/1994 | EP0597109A1 Hydraulically driving system |
| 05/18/1994 | EP0399044B1 Hydraulic servo valve |
| 05/18/1994 | CN2165278Y Centrifugal portable hydraulic oil filter |
| 05/17/1994 | US5311808 Cylinder apparatus |
| 05/10/1994 | US5309936 Poppet configuration for counterbalance valve |
| 05/05/1994 | DE4236554A1 Relaxation surges in hydraulic system - are prevented by valve system with damping chamber formed by control piston and housing |
| 04/28/1994 | DE4335495A1 Gritter or sander vehicle hydraulic appts. control device - measures pressure and revs. rate of hydromotor and controls valve to provide correct pressure of fluid |
| 04/28/1994 | DE4236206A1 Elastomer energy accumulator with safety valve and pump - has piston connected with construction via link and pressing against fluid compressible elastomer |
| 04/26/1994 | US5305731 Apparatus for generating acoustic wave having a liquid lens with an adjustable focal length |
| 04/26/1994 | US5305681 Hydraulic control apparatus |
| 04/20/1994 | EP0592424A1 High force thermochemical actuator. |
| 04/05/1994 | US5299422 Energy converter |
| 03/29/1994 | US5297381 Hydraulic system |
| 03/23/1994 | EP0587902A1 Hydraulically driving system |
| 03/22/1994 | CA1328002C Power transmission |
| 03/17/1994 | WO1994005583A1 Multiple ram assembly and recuperative drive system for hydraulic lift |
| 03/17/1994 | DE4230414A1 Electro-pneumatic control device using electrically operated valves - has each valve drive coupled via bus line to central electronic control device |
| 03/15/1994 | US5293745 Fluid power regenerator |
| 03/09/1994 | EP0471044B1 Extensible hose for reducing pressure pulses |
| 03/03/1994 | WO1994004831A1 Electro-pneumatic control device |
| 03/03/1994 | WO1994004828A1 Hydraulic drive unit of hydraulic working machine |
| 03/03/1994 | DE4228308A1 Double-cylinder hydraulic drive control system e.g. for machine tool - compensates change in volume of pressure spaces of cylinder by piezoelectrically-actuated pistons located at ends of cylinder, with piezoelectric actuators closed off from pressure spaces |
| 03/02/1994 | EP0301096B1 Operation controller |
| 03/01/1994 | USH1292 Electro-rheological fluid damped actuator |
| 02/22/1994 | US5289388 Electrohydraulic control of a die casting machine |
| 02/15/1994 | US5285642 Load sensing control system for hydraulic machine |
| 02/09/1994 | EP0582099A2 Hydraulic system with load sensing |
| 01/27/1994 | DE4232542C1 Hydraulic-excavator oil-cooling circuit - has buffer-stores hot oil separately before pumping through cooled into storage tank |
| 01/19/1994 | CN2153668Y Oil pipe pad for oil pressure cylinder |
| 12/29/1993 | CN2151297Y Washer for hydraulic apparatus |
| 12/29/1993 | CN2151296Y Oil pipe pad of hydraulic cylinder |
| 12/29/1993 | CN2151295Y Hydraulic cylinder structure without segment adjustment |
| 12/28/1993 | US5274557 Teaching and playback method for work machine |
| 12/16/1993 | DE4219462A1 Hydraulic set with pump driven by electric motor - has oil container designed in elongated cylindrical shape with rigid frame having at least three corner posts standing in corners of polygon and cross connections between posts |
| 12/15/1993 | EP0573734A1 Method for controlling hydraulic pump driven by engine |
| 12/15/1993 | EP0573733A1 Method and apparatus for controlling hydraulic pump |
| 12/15/1993 | EP0286683B1 Hydraulic pilot type direction control valve |
| 12/08/1993 | CN2148587Y Bi-directional adjustable oil pressure cylinder pressure ment regulation structure |
| 12/07/1993 | US5268082 Actuator element |
| 11/30/1993 | US5266010 Method and apparatus for controlling hydraulic pump |
| 11/25/1993 | WO1993019313A3 Flow control valve, in particular for hydraulic pressure media |
| 11/24/1993 | EP0366815B1 Hydraulic drive unit for construction machinery |
| 11/24/1993 | CN2147384Y Sound damping oil filter |
| 11/24/1993 | CN1022855C Power transmission |
| 11/16/1993 | US5261234 Hydraulic control apparatus |
| 11/10/1993 | CN2145627Y Pressure structure of oil pressure cylinder |
| 11/09/1993 | US5259293 Hydraulic control device |
| 10/27/1993 | EP0567038A1 Thermal urger |
| 10/27/1993 | CN1077781A Thermal urger |
| 10/21/1993 | CA2082080A1 Thermal urger |
| 10/14/1993 | DE4212184A1 Hydraulic control unit for double acting working cylinder esp. in vehicle steering unit - controls both working volumes by one 4/3-way valve with hydraulic shut off valve connected between each working vol. and 4/3-way valve |
| 10/12/1993 | US5251442 Fluid power regenerator |
| 10/12/1993 | US5251440 Control apparatus and method for automatically controlling a hydraulic system for heavy construction equipment |
| 10/07/1993 | DE4307827A1 Hydraulic power supply system - with variable delivery provided by variable displacement pump that is adjusted to meet demands determined by commands to load devices |
| 10/05/1993 | US5249421 Hydraulic control apparatus with mode selection |
| 09/30/1993 | WO1993019313A2 Flow control valve, in particular for hydraulic pressure media |
| 09/29/1993 | EP0379595B1 Hydraulic driving apparatus |
| 09/28/1993 | US5247965 Linear solenoid valve apparatus |
| 09/21/1993 | US5245910 Rodless cylinder |
| 09/21/1993 | US5245827 Supply valve arrangement for closed center hydraulic system |
| 09/16/1993 | WO1993018445A1 Control system for glassware forming machine |
| 09/16/1993 | WO1993018308A1 Hydraulically driving system |
| 09/16/1993 | CA2123708A1 Control system for glassware forming machine |
| 09/15/1993 | EP0559792A1 Exhaust pressurizing circuit including flow amplification |
| 08/25/1993 | EP0556588A2 Pull actuator |
| 08/19/1993 | WO1993016288A1 Pressure transformer |
| 08/19/1993 | WO1993016285A1 Hydraulically driving system |
| 08/17/1993 | CA1321357C Apparatus for reducing noise resulting from hydraulic pressure surges |
| 08/04/1993 | CN2139639Y Heat pipe wind cooling hydraulic installation |
| 07/28/1993 | EP0552841A2 Method and device for detecting undissolved gas in a hydraulic control system |
| 07/28/1993 | EP0552161A1 Modularly assemblable compressed air preparation system for a pneumatic mechanism |
| 07/22/1993 | WO1993014322A1 Hydraulic control system having poppet and spool type valves |
| 07/22/1993 | DE4201114A1 Electro-hydraulic control circuit for load compensated operation of ram - has venting line with proportional control valve with electronic control for venting rate |