| 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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| 09/14/1995 | DE4406669A1 Servo-hydraulic regulator system for vehicle |
| 09/08/1995 | WO1995023958A1 Apparatus and method for detecting leak in hydraulic system |
| 09/08/1995 | WO1995023925A1 Safety arrangement on hydraulic piston-cylinder units |
| 09/08/1995 | CA2184689A1 Apparatus and method for detecting leak in hydraulic system |
| 09/08/1995 | CA2161972A1 Safety arrangement on hydraulic piston-cylinder units |
| 09/07/1995 | DE4407370A1 Control and monitoring of pressure for hydraulic motor used to hold workpiece in machine tool |
| 09/05/1995 | US5447285 Safety device for cylinder valve automatic switching unit |
| 08/29/1995 | US5445773 Method for detecting abnormality in hydraulic system of molding machine and apparatus therefor |
| 08/29/1995 | US5445188 Pilot operated servo valve |
| 08/03/1995 | DE4402633A1 Magnetically controlled pilot control valve |
| 07/04/1995 | US5428959 Pneumatic control circuit |
| 06/29/1995 | DE4446408A1 Betriebssicherer Fahrsimulator Operation Safe Driving Simulator |
| 06/29/1995 | DE4444548A1 Load moment restricting valve connected to hydraulic force |
| 06/28/1995 | EP0659680A1 Relief valve with hydraulic fuse |
| 06/22/1995 | DE4342587A1 Hydraulic appts. with electric motor driven pump and pressure-limiting valve |
| 05/27/1995 | CA2135985A1 Relief valve with hydraulic fuse |
| 05/18/1995 | WO1995013043A1 Hydraulic system for the hydraulic operation of an ambulance lifting platform |
| 05/09/1995 | US5413404 Method for detecting trouble in fluid pressure system and fluid pressure brake system for vehicle |
| 05/04/1995 | DE4436742A1 Hydraulic overload safeguard |
| 04/26/1995 | EP0649988A1 Driving controller of hydraulic machine |
| 04/06/1995 | DE4336306C1 Arrangement for the automatic shut-off of a pneumatically controlled actuator |
| 03/29/1995 | CN2193453Y Heavy-hammer liquid-controlled locking device for buttlerfly bamper |
| 03/28/1995 | CA1334922C Valve system and arrangement for on-line valve replacement |
| 03/23/1995 | DE4335086C1 Valve with a safety device for releasing the valve spool |
| 03/09/1995 | DE4431871A1 Process and apparatus for sensing an anomaly in the hydraulic system of a moulding machine |
| 03/08/1995 | EP0641919A1 Safety valve arrangement |
| 02/23/1995 | DE4328053A1 Safety device of an automatic printing-plate exchanger |
| 02/08/1995 | EP0637564A1 Safety device with pressurized safety valve |
| 02/08/1995 | CN1098484A Pilot-operated servo valve |
| 01/31/1995 | US5385171 Two-stage hydraulic valves |
| 01/26/1995 | DE4423585A1 Electrohydraulic control device |
| 01/17/1995 | US5381822 Relief valve with hydraulic fuse |
| 01/12/1995 | DE4420459A1 Arrangement for controlling a hydraulic drive |
| 12/27/1994 | US5375619 Protective circuit for pressure and return |
| 12/22/1994 | DE4320490A1 Hydraulic arrangement for a safety control system |
| 12/21/1994 | CN2185819Y One-way automatic air supply valve |
| 12/14/1994 | EP0628731A1 Pilot-actuated servovalve |
| 12/14/1994 | EP0628730A1 Hydraulic system, particularly for a power brake |
| 12/01/1994 | DE4417204A1 Pilot-controlled servo valve |
| 12/01/1994 | DE4320748C1 Monitoring arrangement |
| 11/24/1994 | WO1994027052A1 Driving controller of hydraulic machine |
| 11/22/1994 | US5365965 Hydraulic automatic shutdown valve system |
| 11/10/1994 | DE4314801A1 Hydraulic system, in particular for a folding press |
| 10/25/1994 | CA1332692C Hydraulic safety brake valve arrangement |
| 10/20/1994 | DE4408588A1 Method of detecting faults in a fluid-pressure system and fluid-pressure brake system for vehicles |
| 10/20/1994 | DE4312644A1 Sicherheitsschaltung für ein servohydraulisches Regelsystem Safety circuit for a servo-hydraulic control system |
| 10/12/1994 | EP0619449A2 Safety device for cylinder valve automatic switching unit |
| 10/11/1994 | US5353685 Redundant fluidic multiplexer |
| 10/11/1994 | US5353594 Driving mechanism of a circuit breaker |
| 09/20/1994 | CA2082881C Energy saving and monitoring pneumatic control valve system |
| 08/30/1994 | US5341837 Two line pilot valve |
| 08/03/1994 | EP0608650A1 Safety control device for a hydraulic actuator |
| 07/13/1994 | CN2171402Y Filter of special pollution alarm device |
| 06/30/1994 | DE4342747A1 Hydraulic control circuit for railway rolling stock |
| 06/22/1994 | CN2169468Y Precision hydraulic filter |
| 06/07/1994 | US5317870 Pressure source for pressure device |
| 04/20/1994 | CN1085633A Energy saving and monitoring pneumatic control valve system |
| 04/19/1994 | US5303549 In a machine tool |
| 04/12/1994 | US5301505 Fail safe linear actuator system |
| 04/05/1994 | US5299420 Redundant control system for a work vehicle |
| 03/01/1994 | US5289843 Hydraulic safety valve |
| 02/17/1994 | DE4324177A1 Hydraulic controller, for use in e.g. cranes - contains emergency-stop valve pre-controlling pressure to isolating valve of pressure regulating pump. |
| 01/27/1994 | DE4230359C1 Testing hydraulic actuator for steering rear wheels of motor vehicle - controlling operation of two two-way valves dependent upon sensor signal indicating actual adjustment path |
| 01/25/1994 | US5280807 Supply circuit for a two-tube hydraulic system |
| 01/05/1994 | DE4221756A1 Safety circuit for hydraulic press unit - has two main valves with switching accomplished by set of control edges |
| 12/08/1993 | EP0573191A1 Two-stage hydraulic valves |
| 11/25/1993 | DE4216456A1 Safety switching for servo hydraulic hoist control system - has compound two position valve fitted directly to control side of main regulating valve controlled by pilot valve |
| 10/27/1993 | CN2144729Y High sensitivity self-locking hydraulic safety protector |
| 10/26/1993 | US5255517 Control device for hydraulic operating cylinders of a combined lifting platform and a closing wall of a vehicle |
| 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 |
| 09/30/1993 | DE4209736A1 Passive pressure regulator - has membrane failure indication by intermediate chamber between diaphragms that is pressurised to move small piston acting as indicator |
| 09/14/1993 | US5244004 Hydraulic pipeline valve operating system |
| 09/08/1993 | EP0558976A1 Safety valve |
| 09/01/1993 | CN2141481Y Controllable stop valve |
| 06/22/1993 | US5220861 Actuator with neutral position return |
| 06/16/1993 | EP0546694A1 Energy saving and monitoring pneumatic control valve system |
| 06/09/1993 | EP0491750B1 Control device for hydraulic working cylinders of a loading board wall of a vehicle |
| 05/12/1993 | EP0540963A1 Supply circuit for split hydraulic system |
| 05/11/1993 | US5209261 Slide valve |
| 05/06/1993 | DE4136149A1 Zero position monitoring of hydraulically controlled machines - involves operating valve connected to hydraulic switch valve working against spring force and with at least one pressure connection and two work connections |
| 04/13/1993 | US5201176 Hydraulic control circuit and hydraulic control apparatus therefor |
| 03/31/1993 | EP0534834A1 Hydraulic equipment with security control |
| 03/17/1993 | EP0531304A1 Piston-cylinder control device |
| 03/11/1993 | DE4229834A1 Electrical processing of vacuum pressure information for vacuum unit - comparing each value measured before connection to vacuum aperture with previously stored dual level value below maximum measured value |
| 01/26/1993 | US5181380 Hydrostatic operating mode hydraulic actuator preferably for backup operation, and flight control system comprising it |
| 12/29/1992 | US5174189 Fluid control apparatus |
| 11/17/1992 | US5163353 Energy saving and monitoring pneumatic control valve system |
| 11/05/1992 | DE4113202A1 Switch for tunnelling machine hydraulic drive - interrupts pump delivery when ram pressure drops to reduce spillage of hydraulic fluid |
| 08/13/1992 | DE4131821C1 Pressure medium safety circuit for boiler lid handling - has extra safety valve coupled to valve system for switching in dependence on pressure threshold value |
| 08/11/1992 | US5136930 Apparatus for supplying pressure oil to hydraulic cylinders employed in working machines |
| 08/11/1992 | US5136929 Device for the control of a double-acting hydraulic jack |
| 08/05/1992 | EP0497450A1 Dynamic self-monitoring air operating system |
| 07/30/1992 | CA2058492A1 Dynamic self-monitoring air operating system |
| 07/15/1992 | CN1017466B Valve system and arrangement for on-line valve replacement |
| 07/01/1992 | EP0491750A1 Control device for hydraulic working cylinders of a loading board wall of a vehicle. |
| 06/30/1992 | US5125323 Pressurized oil supply/discharge circuit and valve device for use in such circuit |
| 06/02/1992 | US5117868 Pilot-controlled directional valve |
| 05/19/1992 | US5113907 Dynamic self-monitoring air operating system |
| 05/07/1992 | DE4135757A1 Diaphragm type hydraulic overload protection device - has throttle in front of diaphragm to allow oil flow to load at residual pressure |
| 03/25/1992 | EP0477079A1 Hydraulic actuator with a hydrostatic functioning mode, for use in emergencies and flight control system provided with such a device |