| Patents for F15B 11 - Servomotor systems without provision for follow-up action (16,384) |
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| 06/28/1989 | EP0321573A1 Reciprocation switching structure for pumps |
| 06/28/1989 | EP0321475A1 Load responsive system having synchronizing systems between positive and negative load compensation. |
| 06/27/1989 | US4842019 Pressure compensator device for proportional type hydraulic distributor and hydraulic distributor incorporating same |
| 06/20/1989 | US4840236 Hydraulic-pneumatic actuator for impact cutter |
| 06/13/1989 | US4838756 Hydraulic system for an industrial machine |
| 06/13/1989 | CA1255776A1 Apparatus for controlling actuators operative under negative pressure |
| 06/13/1989 | CA1255552A1 Pneumatic control assembly for a pneumatic cylinder |
| 06/07/1989 | EP0319089A2 Safety device for hydraulic closed circuit |
| 06/07/1989 | EP0318671A2 Pneumatic shock absorber |
| 06/06/1989 | US4836245 Control valve |
| 06/06/1989 | US4836088 Directional control valve and regeneration valve |
| 06/06/1989 | US4836087 Hydraulic control apparatus for vehicle |
| 06/06/1989 | US4835968 Hydraulic circuit in an industrial vehicle |
| 05/30/1989 | US4833884 Fluid actuator for driving article-processing apparatus |
| 05/24/1989 | EP0316500A1 Control device for a piston located in a cylinder |
| 05/23/1989 | US4832082 Hydraulic pilot operated directional control valve |
| 05/23/1989 | US4831915 Dual diaphragm three position actuator |
| 05/16/1989 | US4830131 Variable assist power steering system |
| 05/16/1989 | US4830050 Fluid control valve |
| 05/10/1989 | WO1989009343A1 Hydraulic driving unit |
| 05/10/1989 | EP0314704A1 Load responsive system using load responsive pump control of a bypass type |
| 05/09/1989 | US4827831 Reciprocating device and switching mechanism therefor |
| 05/03/1989 | EP0314660A1 A hydraulic lifting arrangement |
| 05/02/1989 | US4825748 Hydraulic actuator synchronization apparatus and system |
| 05/02/1989 | US4825745 Electrohydraulic control system |
| 04/26/1989 | EP0313415A1 Control apparatus for hydraulic continuously variable speed transmission |
| 04/25/1989 | US4823588 Hand tools including a hydraulic jack for the control of working members |
| 04/25/1989 | US4823550 Rotary valve with jet pump aspirator |
| 04/20/1989 | WO1989003484A1 Hydraulique drive system |
| 04/18/1989 | US4821625 Valve device for controlling the delivery of pressurized liquid to two separate hydrostatic motors |
| 04/18/1989 | US4821622 Extension and retraction sequencing circuit |
| 04/18/1989 | CA1252690A1 Power hydraulic gear |
| 04/12/1989 | EP0311267A1 Pneumatic actuator |
| 04/11/1989 | US4820831 Process for preparing 4,4'-dihydroxydiphenyl sulfone having high purity |
| 04/11/1989 | US4819430 Fluid circuit system |
| 04/11/1989 | US4819429 Hydraulical drive system |
| 04/05/1989 | EP0310454A2 Compensated individual segment flow regulator |
| 04/05/1989 | EP0309987A1 Fluid pressure control system |
| 04/05/1989 | EP0309729A2 Dual-pressure supply system in a motor vehicle |
| 04/05/1989 | EP0179112B1 Improvements to handtools comprising a hydraulic jack for the control of working members |
| 03/29/1989 | EP0308509A1 Hydraulic clutch pressure control apparatus |
| 03/29/1989 | CN2035014U Hydraulic control system for gripping mechanism |
| 03/29/1989 | CN2034936U In-situ steering device for motor vehicle |
| 03/28/1989 | US4815695 Pipe propelling device |
| 03/21/1989 | US4813518 Brake release mechanism |
| 03/21/1989 | US4813339 Pulse-width-modulation control of parallel three-way valves to supply single-acting quick-response actuator |
| 03/21/1989 | US4813335 Hydraulic actuator for automobiles |
| 03/21/1989 | US4813235 Hydraulic gain reduction circuit |
| 03/21/1989 | CA1251376A1 Sectional valve having dual pressure relief |
| 03/14/1989 | US4812109 Apparatus for driving piston by fluid pressure |
| 03/14/1989 | US4811650 Power transmission |
| 03/14/1989 | US4811649 Hydraulic control apparatus |
| 03/09/1989 | WO1989002033A1 Load responsive control system adapted to use of negative load pressure in operation of system controls |
| 03/09/1989 | WO1989002010A1 Pressure responsive hydraulic control circuit |
| 03/09/1989 | DE3728994A1 Arrangement for supplying a main consumer with hydraulic pressure medium |
| 03/08/1989 | EP0306368A1 Pressure compensator valve for a hydraulic proportional directional valve, and hydraulic directional valve comprising it |
| 03/08/1989 | EP0305761A2 Secondarily controlled hydrostatic transmission with an open circuit |
| 03/07/1989 | CA1250795A1 Hydraulic control block |
| 03/01/1989 | EP0304911A2 Hydraulic control system |
| 02/08/1989 | CN1030971A Valve manifold stacking base |
| 02/07/1989 | US4802537 Control circuit for positioning and tilting an earthmoving blade |
| 02/07/1989 | US4802401 Pneumatically movable device with a safety lock means |
| 02/07/1989 | US4802267 Method and apparatus for controlling retracting speeds of injection molding machines |
| 02/01/1989 | EP0301896A2 Hydraulic control device for a continuously variable transmission for motor vehicles |
| 02/01/1989 | EP0301096A1 Operation controller |
| 02/01/1989 | CN2031859U Hydraulic system eliminated hydraulic impaction |
| 01/31/1989 | US4800990 Three speed valve control for high performance hydraulic elevator |
| 01/31/1989 | US4800797 Hydraulic percussion device and method of controlling same |
| 01/31/1989 | CA1249498A1 Fluid system with selective differential pressure control |
| 01/25/1989 | EP0300929A1 Hydraulic distributing device for percussion apparatus |
| 01/24/1989 | US4799420 Load responsive control system adapted to use of negative load pressure in operation of system controls |
| 01/24/1989 | CA1249202A1 Load sensing circuit of load responsive direction control valve |
| 01/17/1989 | US4798527 Control system for injection molding machine |
| 01/17/1989 | US4798126 Load responsive system using load responsive pump control of a bypass type |
| 01/12/1989 | WO1989000248A1 Load sensing circuit of load responsive direction control valve |
| 01/11/1989 | EP0298083A1 Load compensated valve |
| 01/10/1989 | US4796652 Pressure regulator for hydraulically controlled machine tools |
| 01/10/1989 | CA1248410A1 Power transmission |
| 01/09/1989 | US4891942 Hydraulically powered actuator for maintaining a member under preload |
| 01/05/1989 | DE3820876A1 Hydrostatic steering system |
| 01/04/1989 | EP0297401A2 Hydraulic control device |
| 01/04/1989 | EP0297277A2 Power assistance valve system |
| 01/04/1989 | EP0297106A1 Load sensing circuit and electrohydraulic control for load compensated directional control valve. |
| 01/03/1989 | US4794846 Proportional action valve with a biased spring unproportionately variable to the load pressure |
| 12/29/1988 | WO1988010342A1 Constant pressure regulation of grader blades |
| 12/29/1988 | WO1988010206A1 Hydrostatic steering device |
| 12/28/1988 | EP0296526A2 Valve for hydraulic cylinders and the like |
| 12/27/1988 | US4793238 Control signal blocking direction control valve in load-sensing circuit |
| 12/22/1988 | DE3719814A1 Hydropneumatic linear drive |
| 12/13/1988 | CA1246497A1 Method for feeding hydraulic fluid, both continuously and by means of controlled impulses, to activate a hydraulic lift working normally in a continuous mode, and apparatus forthe implementation of said method |
| 12/13/1988 | CA1246425A1 Post-pressure-compensated unitary hydraulic valve |
| 12/07/1988 | EP0294072A2 Control device for regulating flow of pressurized gas between two pressurized gas devices |
| 12/06/1988 | CA1245911A1 Steering assistance pump |
| 12/01/1988 | WO1988009442A1 Electrohydraulic guide system |
| 12/01/1988 | WO1988009440A1 Reciprocation switching structure for pumps |
| 11/30/1988 | EP0293321A2 Apparatus for controlling a fluid-pressure differential cylinder actuator |
| 11/30/1988 | EP0292473A1 Method for reducing the piston speed, especially in the piston and cylinder assemblies of an excavating machine, and device for carrying out the method. |
| 11/29/1988 | US4787294 Sectional flow control and load check assembly |
| 11/29/1988 | US4787293 Hydraulic system for working vehicles |
| 11/29/1988 | US4787206 Hydraulic pressure transducer |