| 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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| 10/19/1988 | EP0286683A1 Hydraulic pilot type direction control valve |
| 10/13/1988 | DE3710235A1 Hydraulic system part for a hydraulic-oil utiliser |
| 10/12/1988 | EP0286391A2 Bleed valve |
| 10/06/1988 | WO1988007633A1 Hydraulic drive |
| 10/06/1988 | DE3709211A1 Device for controlling the piston of a working cylinder |
| 10/05/1988 | EP0128149B1 Volumetric control device for fluids |
| 10/04/1988 | CA1242781A1 Power transmission |
| 09/28/1988 | CN87208604U High-pressure topping-up unit |
| 09/13/1988 | US4770083 Independently actuated pressure relief system |
| 09/06/1988 | US4768339 Hydraulic drive system |
| 09/06/1988 | CA1241680A1 Coupling device for pneumatic apparatus |
| 08/24/1988 | CN87101425A 三合一滤器 Triple filter |
| 08/23/1988 | US4765366 Temperature compensated control valve for automatic transmissions |
| 08/23/1988 | EP0276253A4 Pulse jet fabric filter. |
| 08/11/1988 | WO1988005937A1 Operation controller |
| 08/11/1988 | DE3702904A1 Hydraulic supply unit |
| 08/10/1988 | EP0277602A2 Hydraulic system for power actuator control in vehicles |
| 08/09/1988 | US4761954 Fork-lift system |
| 08/09/1988 | US4761953 Hydraulic elevator mechanism |
| 08/03/1988 | EP0276253A1 Pulse jet fabric filter. |
| 07/27/1988 | EP0275969A2 Control device for a hydrostatic transmission for at least two users |
| 07/27/1988 | EP0275968A2 Control device for a hydrostatic transmission for at least two users |
| 07/27/1988 | CN87216191U Pulsation eliminater of liquid pressure |
| 07/26/1988 | US4759183 Control arrangement for at least two hydraulic loads fed by at least one pump |
| 07/20/1988 | CN86108889A 液压脉冲发生器 Hydraulic pulse generator |
| 07/19/1988 | US4757747 Power transmission |
| 07/14/1988 | DE3644737A1 Control arrangement for at least two hydraulic consumers fed by at least one pump |
| 07/12/1988 | US4756233 Air filter system for a vacuum actuator |
| 06/30/1988 | WO1988004734A1 Load sensing circuit and electrohydraulic control for load compensated directional control valve |
| 06/29/1988 | CN87214188U Single channel rotary hydraulic impulsator |
| 06/07/1988 | CA1237635A1 Process and apparatus for vibratory operation of a working piston |
| 06/01/1988 | EP0269091A2 Hydraulic cylinder actuator |
| 05/31/1988 | US4747335 Load sensing circuit of load compensated direction control valve |
| 05/25/1988 | CN87208725U Trapezium wave gas pulse generator |
| 05/24/1988 | US4745745 Energy storage device |
| 05/17/1988 | US4744218 Power transmission |
| 05/05/1988 | WO1988003123A1 Arrangement for a hydraulically driven truck |
| 05/05/1988 | WO1988003098A1 Arrangement for a hydraulically operated lifting arrangement |
| 05/03/1988 | US4742189 Visco-elastic delayed actuator |
| 04/26/1988 | US4739617 Control arrangement for at least two hydraulic consumers fed by at least one pump |
| 04/13/1988 | EP0263252A2 Temperature-compensated accumulator valve, particularly for the hydraulic control of motor vehicle transmissions |
| 04/13/1988 | CN87106021A Direction controling valve with hydraulic pilot valve |
| 03/31/1988 | DE3709474C1 Solenoid valve |
| 03/30/1988 | EP0262098A1 A flow recovery system for hydraulic circuits with pumps and pressure compensated distributor valves for working members of earth-moving machines |
| 03/30/1988 | EP0261711A2 Improved modular assembly of treatment and control elements for compressed air distribution systems |
| 03/10/1988 | WO1988001706A1 Hydraulic pilot type direction control valve |
| 03/08/1988 | US4729730 Pressure transmitting apparatus with superplastic alloy as the pressure transmitting medium |
| 03/08/1988 | US4729224 Installation, apparatus and method for actuating doors, gates and the like under extreme environmental conditions |
| 03/01/1988 | US4727875 Generator of high power elastic pulses focused in a liquid and obtained by impact |
| 02/23/1988 | US4726186 Control system of hydraulic construction machinery |
| 02/11/1988 | DE3626077A1 Hydraulic valve |
| 02/02/1988 | US4723107 Hydraulic lifting mechanism |
| 01/28/1988 | DE3624328A1 Method and device for the synchronous control of servovalves for servo actuating cylinders, especially in hydraulic ram machines |
| 01/27/1988 | CN87104663A Pulse jet fabric filter |
| 01/14/1988 | DE3621526A1 Electro-pneumatic or electro-hydraulic control device for a pneumatically or hydraulically actuated actuator |
| 01/12/1988 | US4718329 Control system for hydraulic circuit |
| 01/07/1988 | EP0153332B1 Method and device for the vibratory operation of a working piston, particularly for working tools |
| 12/29/1987 | US4715265 Process and apparatus for vibratory operation of a working piston, in particular for active working tools |
| 12/29/1987 | US4715180 Hydraulic lift mechanism |
| 12/03/1987 | DE3618324A1 Electro-pneumatic movement device |
| 12/02/1987 | EP0247335A2 Electrohydrolic system with distributed control |
| 11/25/1987 | CN87101995A Hydraulic silencer |
| 11/19/1987 | EP0246203A2 An actuator for producing a displacement movement on a set temperature being reached |
| 11/05/1987 | WO1987006657A1 Electro-hydraulic converter |
| 11/05/1987 | DE3614484A1 Elektrohydraulischer wandler Electro-hydraulic converter |
| 10/27/1987 | US4702148 Control of the actuation of hydraulic consumers |
| 10/27/1987 | US4702076 Hydraulically operated clam-shell device |
| 10/21/1987 | CN86102585A Intelligent hydraulic motor |
| 10/15/1987 | DE3611794A1 Pressure generator for a hydraulic system |
| 10/14/1987 | EP0240965A1 Electrohydraulic system with distributed control |
| 09/30/1987 | EP0238942A1 Sensor-controlled hydraulic system using electroviscous fluids |
| 09/29/1987 | US4696684 Method and apparatus for eliminating cavitation in hydraulic systems |
| 09/16/1987 | CN87100435A Hydaulic device for engineering mechanism |
| 09/16/1987 | CN86108701A Control system of hydraulic constructional mechanism |
| 09/15/1987 | US4693080 Hydraulic circuit with accumulator |
| 09/10/1987 | DE3606953A1 Modular preparation apparatus for compressed air and other media |
| 09/09/1987 | EP0235545A2 Hydraulic drive system |
| 09/09/1987 | EP0163688B1 A pilot oil supply arrangement |
| 09/08/1987 | US4691516 Thermally-activated device for creating considerable power |
| 09/01/1987 | US4690035 Emergency draining device for stopping pneumatic cylinders |
| 08/18/1987 | US4686828 Hydraulically operated clamshell device |
| 08/13/1987 | WO1987004762A1 Hydraulic actuator circuit with chamber bypass controlled by negative load pressure directing valve |
| 08/12/1987 | EP0232014A2 Energy-conserving servomechanisms |
| 08/11/1987 | US4686658 For transmitting signals through a fluid |
| 08/11/1987 | US4685294 Viscosity-temperature compensator for hydraulic systems |
| 08/11/1987 | US4685293 Air bleeding system for hydraulic closed circuits |
| 08/05/1987 | EP0230884A2 Hydraulic lifting device |
| 07/21/1987 | US4680928 Warm-up promotion device for automatic transmission |
| 07/15/1987 | EP0228707A1 Control system of hydraulic construction machinery |
| 06/17/1987 | CN86201639U Pump sucking hole device with heater |
| 05/19/1987 | US4665698 Hydraulic system with proportional control |
| 05/19/1987 | US4665696 Hydraulically operated hoist for containerized freight or the like |
| 05/13/1987 | EP0221527A2 Hydraulic filter system for excavation equipment |
| 05/06/1987 | EP0220512A1 Method of running a hydraulic system with a fluid made on the basis of glycols |
| 05/05/1987 | US4663034 Hydraulic filter system for excavation equipment |
| 04/28/1987 | CA1221152A1 Hydraulic system with proportional control |
| 04/22/1987 | CN86105270A 动力传送 Power transmission |
| 04/21/1987 | USRE32404 Elevator with power recovery |
| 04/21/1987 | US4658856 Microleaks intercepting apparatus for avoiding and/or signalling oil leakages in hydraulic plants and for equivalent uses |
| 04/15/1987 | EP0218050A2 Fluid servo system |