| 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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| 03/26/1987 | DE3532809A1 Circuit arrangement for activating a valve for a lifting cylinder |
| 03/24/1987 | US4651621 Control system for an air motor |
| 03/17/1987 | US4649705 Composite hydraulic system |
| 03/11/1987 | CN86104688A Starting method of hydraulic device in underground dislodging |
| 03/05/1987 | DE3530800A1 Pressure-cylinder system for admission of pressure medium to the piston on both sides, with a damping device for external, preferably vibration-like disturbance forces of high frequency |
| 03/05/1987 | DE3530787A1 Method and device for producing hydraulic or pneumatic pressure flows of constant characteristic at variable frequency |
| 02/26/1987 | DE3530408A1 Hydraulic safety control system for an actuating sequence of two hydraulic drive devices |
| 02/18/1987 | CN85203710U Three function gas source processing unit for water knockout, regulating pressure and oil mist |
| 02/04/1987 | EP0210170A1 Digital electro-hydraulic valve arrangement |
| 02/03/1987 | US4640732 Apparatus for fusion joining of thermoplastic pipes |
| 02/03/1987 | US4640095 Digital electro-hydraulic valve arrangement |
| 01/31/1987 | CN85102392A Fluid vibration apparatus |
| 01/29/1987 | DE3525313A1 Degassing valve for a container seal |
| 01/28/1987 | EP0209553A1 Hydraulic pulse generator. |
| 01/28/1987 | CN85104763A Method and device to remove gas cells in a hydraulic system |
| 01/27/1987 | CA1217258A1 Electro-hydraulic actuating apparatus for a continuously adjustable valve |
| 01/21/1987 | EP0209416A1 Generator of focussed high-power elastic pulses in a fluid, and generated by percussion |
| 01/20/1987 | US4637495 Pressure/viscosity compensated up travel for a hydraulic elevator |
| 01/14/1987 | CN85105194A Route valve with hydraulic actuation |
| 01/13/1987 | US4635439 Fluid operated system control |
| 01/07/1987 | CN86104494A Generator of high power elastic pulses focused in a liquid and obtained by impact |
| 01/06/1987 | US4633903 Distributing control valve with hydraulic control |
| 12/30/1986 | EP0206119A1 Method and apparatus for eliminating cavitation in hydraulic systems |
| 12/30/1986 | EP0205925A2 Control device for hydraulic power equipment |
| 12/23/1986 | US4630523 Electrohydraulic regulating drive |
| 12/02/1986 | US4625622 Power transmission |
| 11/25/1986 | US4624290 Prefilled hydraulic control apparatus for motor vehicle |
| 11/05/1986 | CN85103780A Hydraulic delay two-stage brake hydraulic station |
| 10/28/1986 | CA1213189A1 Automatic reservoir bleed valve |
| 10/23/1986 | WO1986006142A1 Fluid operated system control |
| 10/21/1986 | US4617796 Sleeve valve for a pulsed gas generator |
| 10/14/1986 | US4616476 Cylinder driving apparatus |
| 10/08/1986 | EP0196795A2 Apparatus for fusion joining of thermoplastic pipes |
| 10/01/1986 | EP0195913A2 Sleeve valve for a pulsed gas generator |
| 09/02/1986 | US4609011 Flow control valve |
| 09/02/1986 | US4608910 Compressed fluid saving device |
| 09/02/1986 | CA1210667A1 Power transmission |
| 08/13/1986 | EP0190703A1 Control system for hydraulic circuit |
| 08/12/1986 | US4605042 Pilot oil supply arrangement |
| 07/31/1986 | WO1986004431A1 Digital electro-hydraulic valve arrangement |
| 07/17/1986 | WO1986004120A1 Hydraulic pulse generator |
| 07/16/1986 | CN85202372U Installation for erasing air cell in hydraulic system |
| 07/02/1986 | EP0185894A1 Hydraulic system |
| 07/01/1986 | US4597405 Process and apparatus for controlling a controllable magnitude and use of the process |
| 06/17/1986 | CA1206065A1 Hydrostatic or pneumatic drive and method of operating same |
| 05/27/1986 | US4590763 Method of supplying a normally continuous operating hydraulic actuator with hydraulic fluid, continuously and by controlled pulse, and a device for implementing said method |
| 05/13/1986 | US4587808 Control system for hydraulic circuit means |
| 05/07/1986 | EP0180127A2 Paving stone or brick splitting device |
| 05/06/1986 | US4586330 Control system for hydraulic circuit apparatus |
| 04/29/1986 | CA1203736A1 Pressure operated pulsatile fluid flow device |
| 04/23/1986 | EP0045785B1 A fluid device |
| 04/02/1986 | EP0176156A1 Hydraulic circuit with accumulator |
| 03/25/1986 | US4577893 Connecting clamp for pneumatic apparatus |
| 02/18/1986 | US4570675 Pneumatic signal multiplexer |
| 02/12/1986 | EP0171363A1 Microleaks intercepting apparatus for avoiding and/or signalling oil leakages in hydraulic plants and for equivalent uses |
| 01/21/1986 | US4565259 Connection block |
| 01/14/1986 | US4563939 Operating a pressure fluid drive device for accelerating/decelerating |
| 12/31/1985 | US4561249 Control system for hydraulic circuit apparatus |
| 12/18/1985 | EP0164561A2 Flow control valve |
| 12/11/1985 | EP0163688A1 A pilot oil supply arrangement. |
| 12/03/1985 | US4556174 Separation of solids from liquids |
| 11/27/1985 | EP0162765A1 Force multiplier device, in particular for machine tool controls |
| 11/13/1985 | EP0161237A1 Hydraulically-operated directional-control valve |
| 11/05/1985 | CA1196253A1 Digital drive control of compensated valves |
| 10/22/1985 | US4548296 Hydraulic elevator |
| 10/22/1985 | US4548231 Pilot-operated pressure-limiting valve with a feeding function |
| 10/22/1985 | CA1195566A1 Pneumatic interface apparatus for control of process systems |
| 09/17/1985 | US4541241 Hydraulic driving arrangement for reciprocable masses or the like |
| 08/27/1985 | US4537029 Power transmission |
| 08/20/1985 | US4535812 Time controlled gas flows |
| 08/06/1985 | US4533020 Three-unit assembly for pneumatic circuit |
| 08/06/1985 | US4532853 Fluid-powered actuators |
| 07/30/1985 | US4531706 Pressure operated control installation |
| 07/30/1985 | CA1191131A1 Process and apparatus for treating dispersions and the like with non-sinusoidal vibration |
| 07/24/1985 | EP0149386A1 Urgent-venting device for pneumatic actuators |
| 07/16/1985 | US4529512 For construction machinery |
| 07/16/1985 | US4529004 Pneumatic timing valves |
| 07/03/1985 | EP0147256A1 Continuous and intermittent feed of hydraulic fluid to a ram |
| 06/25/1985 | US4524793 Automatic reservoir bleed valve |
| 06/18/1985 | US4523886 Container handler with programmed electro-hydraulic control circuit |
| 05/23/1985 | WO1985002233A1 A pilot oil supply arrangement |
| 05/14/1985 | US4516469 Electric hydraulic controll device for a construction vehicle |
| 04/30/1985 | US4513782 Electrohydraulic servovalve device |
| 04/25/1985 | WO1985001787A1 Automatic reservoir bleed valve |
| 04/24/1985 | EP0025053B1 Fluidic oscillator device |
| 04/16/1985 | CA1185686A1 Container handler with programmed electro-hydraulic control circuit |
| 04/16/1985 | CA1185679A1 Electrohydraulic servovalve device |
| 04/09/1985 | US4509407 Hydraulic control valve with maintenance-facilitating feature |
| 03/19/1985 | US4505111 Hydraulic control system for industrial vehicle |
| 03/19/1985 | CA1184124A1 Fluidic oscillator with resonant inertance and dynamic compliance circuit |
| 02/28/1985 | WO1985000762A1 Method and device for the vibratory operation of a working piston, particularly for working tools |
| 02/19/1985 | US4499920 In a fluid exhaust line |
| 01/29/1985 | US4495799 Determining the level of contaminants in a hydraulic system |
| 01/08/1985 | CA1180638A1 Hydraulic elevator |
| 01/02/1985 | EP0129645A1 Air-operated oil cooler |
| 12/27/1984 | CA1179920A Control of continuous reciprocation of a fluid power cylinder |
| 12/25/1984 | US4489812 Power recovery system and method for elevator apparatus |
| 12/25/1984 | US4489750 Pressure operated pulsatile fluid flow device |
| 10/24/1984 | EP0122807A1 Hydraulic system with proportional control |
| 10/16/1984 | US4476679 Civil engineering and construction machinery with hydraulic drive system |