| Patents for F15B 20 - Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems (2,348) |
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| 03/18/1992 | EP0352263B1 Fail-fixed servovalve with controlled hard-over leakage |
| 02/23/1992 | CA2046766A1 Redundant fluidic multiplexer |
| 01/28/1992 | US5083494 Electro-hydraulic actuator with mechanical memory |
| 01/15/1992 | EP0466582A1 Pressure oil supply/discharge circuit and valve device for use in said circuit |
| 12/12/1991 | WO1991019108A1 Piston-cylinder control device |
| 12/04/1991 | EP0459840A1 Control device for a double acting hydraulic actuator |
| 12/04/1991 | CN1014972B Oil hydraulic lift |
| 10/16/1991 | CN2086819U Rupture-type safety valve for quick oil drain |
| 07/27/1991 | CA2034609A1 Electro-hydraulic actuator with mechanical memory |
| 06/04/1991 | US5020322 Accumulator blow-back hydraulic circuit |
| 03/14/1991 | WO1991004169A1 Control device for hydraulic working cylinders of a loading board wall of a vehicle |
| 03/14/1991 | CA2066727A1 Control device for hydraulic working cylinders of a loading board wall of a vehicle |
| 02/19/1991 | US4993781 Aircraft |
| 02/19/1991 | CA1280392C Rotary shredding apparatus |
| 01/02/1991 | EP0404956A1 Oil pressure feeder of work machine cylinder |
| 11/28/1990 | CN1047261A Oil hydraulic lift |
| 11/27/1990 | US4972761 Hydraulic safety brake valve arrangement for load lowering |
| 08/28/1990 | CA1273266A1 Cross line relief valve mechanism |
| 06/26/1990 | US4936196 Device for resetting servo actuator to neutral position |
| 06/26/1990 | US4936032 Safety valve for hydraulic receiver and hydraulic circuit comprising same |
| 06/05/1990 | US4930401 Valve system and arrangement for on-line valve replacement |
| 06/05/1990 | US4930311 Exhaust and inlet line brake valves for hydrostatic motor |
| 05/30/1990 | EP0370131A1 Three way pilot operated valve |
| 05/16/1990 | CN1042221A Valve system and arrangement for on-line valve replacement |
| 05/02/1990 | EP0366281A1 Valve system and arrangement for on-line valve replacement |
| 03/08/1990 | WO1990002267A1 Oil pressure feeder of work machine cylinder |
| 03/06/1990 | US4905933 Control apparatus of control surface of aircraft |
| 02/27/1990 | US4903729 Safety valve |
| 02/27/1990 | US4903728 Safety valve |
| 02/27/1990 | US4903727 Safety valve |
| 02/20/1990 | US4902176 Processing apparatus which may be selectively set in two positions in accordance with fluid pressure |
| 02/20/1990 | CA1265977A1 Motor seal protector valve |
| 01/31/1990 | EP0352263A1 Fail-fixed servovalve with controlled hard-over leakage. |
| 12/27/1989 | EP0347562A2 Safety valve |
| 12/05/1989 | US4884401 Three position dual failure shut-off valve system |
| 11/23/1989 | EP0342410A2 Safety valve |
| 11/23/1989 | EP0342409A2 Safety valve |
| 11/23/1989 | DE3816987C1 Safety valve |
| 10/31/1989 | US4876906 Non-jamming actuator system |
| 10/26/1989 | DE3812116A1 Electrohydraulic directional control valve |
| 10/19/1989 | DE3811312A1 Double-acting working cylinder |
| 10/12/1989 | EP0352263A4 Fail-fixed servovalve with controlled hard-over leakage. |
| 09/05/1989 | US4864210 Servo valve |
| 08/30/1989 | EP0330575A1 Hydraulic circuit comprising a safety valve for a hydraulic actuator |
| 07/04/1989 | US4844125 Electrically-operable fluid control valve |
| 06/13/1989 | US4838161 Arrangement for reversing pressure of cylinders and rollers in printing machines |
| 05/09/1989 | US4827981 Fail-fixed servovalve with controlled hard-over leakage |
| 02/28/1989 | US4807517 Electro-hydraulic proportional actuator |
| 02/21/1989 | US4805515 Fail-safe servovalve system |
| 12/14/1988 | EP0294967A2 Electrically-operable fluid control valve |
| 11/29/1988 | US4788483 Parallel redundant actuator systems |
| 10/27/1988 | DE3712481A1 Valve arrangement with safety function |
| 10/20/1988 | DE3807525A1 Hydraulic control system |
| 08/24/1988 | EP0146614B1 Electro-fluidic relai |
| 08/09/1988 | CA1240236A1 Jam compensating control valve |
| 06/16/1988 | WO1988004367A1 Fail-fixed servovalve with controlled hard-over leakage |
| 06/07/1988 | US4748896 For regulating the flow of a pressure fluid |
| 05/10/1988 | CA1236344A1 Nitrogen die cylinder |
| 05/03/1988 | US4742194 Device for producing an electric signal indicative of pressure in a fluid system |
| 03/29/1988 | US4733691 Solenoid valve |
| 01/26/1988 | US4721257 Rotary shredding apparatus |
| 01/26/1988 | US4721027 Double acting linear actuator |
| 01/07/1988 | EP0251535A2 Parallel redundant actuator systems |
| 01/07/1988 | DE3622219A1 Control device for at least the pump of a hydrostatic transmission |
| 12/22/1987 | US4713936 Motor seal protector valve |
| 12/15/1987 | US4712375 Safety device for priority hydraulic consumer |
| 11/19/1987 | EP0120006B1 Two-fluid nonflammable hydraulic system |
| 11/17/1987 | US4706548 Two-hand safety control mechanism |
| 10/20/1987 | CA1228280A1 Pilot valves for two-stage hydraulic devices |
| 10/13/1987 | CA1227990A1 Monitor for double safety valves |
| 09/22/1987 | CA1227175A1 Thermal servo-motor, particularly for valves |
| 09/01/1987 | US4690035 Emergency draining device for stopping pneumatic cylinders |
| 08/25/1987 | US4688469 Fault detector for a triplexed mechanical or hydromechanical system |
| 06/10/1987 | EP0224623A1 Servovalve with integrated failure monitoring |
| 06/03/1987 | EP0224156A2 Hydraulic system with a hydraulic motor and a pressure-operated valve |
| 05/27/1987 | CN86107785A Motor seal protector valve |
| 05/14/1987 | DE3638037A1 Safety arrangement for hydraulic systems |
| 04/23/1987 | WO1987002427A1 Fault detector for a triplexed mechanical or hydromechanical system |
| 04/21/1987 | US4658856 Microleaks intercepting apparatus for avoiding and/or signalling oil leakages in hydraulic plants and for equivalent uses |
| 02/26/1987 | DE3530408A1 Hydraulic safety control system for an actuating sequence of two hydraulic drive devices |
| 02/17/1987 | US4644180 Actuator emergency operation |
| 01/20/1987 | US4637294 Device for controlling the supply of fluid under pressure to a hydrauic circuit as a function of the state of locking of unlocking of two mechanical members |
| 10/07/1986 | US4615358 Pilot valves for two-stage hydraulic devices |
| 09/24/1986 | EP0195463A2 Hydraulic master-slave cylinder clutch with safety system to assure positive clutch actuation |
| 09/23/1986 | US4612846 High pressure hydraulic distributor having a mechanically controlled discharge valve |
| 09/23/1986 | US4612844 Fail-passive actuator control |
| 09/16/1986 | US4611620 Hydraulic circuit breaker |
| 09/09/1986 | CA1211011A1 Rotation speed control apparatus for internal combustion engines |
| 08/13/1986 | EP0190467A2 Fail-passive actuator control |
| 07/23/1986 | EP0072793B1 Control for dead engine lower |
| 07/01/1986 | US4597410 Cross line relief valve mechanism |
| 06/24/1986 | US4596177 Actuator system |
| 06/04/1986 | CN85203129U Manual hydraulic pump |
| 05/28/1986 | EP0182408A1 Actuator and pressure adjusting unit therefore |
| 05/21/1986 | EP0181763A2 Actuator emergency operation |
| 05/06/1986 | CA1204193A1 Power transmission |
| 03/18/1986 | US4576198 Servovalve with integrated failure monitoring |
| 02/25/1986 | US4572489 Nitrogen die cylinder |
| 02/18/1986 | US4570661 Hydraulic fluid supply systems |
| 02/12/1986 | EP0171363A1 Microleaks intercepting apparatus for avoiding and/or signalling oil leakages in hydraulic plants and for equivalent uses |