| Patents for F01L 25 - Drive, or adjustment during operation, of distribution or expansion valves by non-mechanical means (555) |
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| 01/01/1991 | US4981068 Expansible chamber device having variably restrained valve systems |
| 11/28/1990 | EP0398977A1 Apparatus for removing fluid from the ground and method for same |
| 11/21/1990 | CN1047133A Lift valve in rotary screw machine |
| 10/31/1990 | EP0394356A1 Improved fluid-driven pump |
| 08/14/1990 | US4947731 Multicyclinder self-starting uniflow engine |
| 08/09/1990 | WO1990008904A1 Fluid-powered precision oscillator |
| 08/07/1990 | WO1990008896A1 Self-reversing reciprocating piston pump with hydraulic transmission of the inversion signal |
| 08/07/1990 | US4945815 Pneumatic type of reciprocating movement device |
| 08/07/1990 | CA2026986A1 Autoreversing alternating piston pump having hydraulically transmitted reversing signal |
| 08/01/1990 | EP0379882A2 Cleaning system for pipelines |
| 07/12/1990 | WO1990007630A1 Multicylinder self-starting uniflow engine |
| 07/03/1990 | US4938117 Multicylinder self-starting uniflow engine |
| 05/17/1990 | DE3838639A1 Hydraulic striking mechanism |
| 03/08/1990 | WO1990002263A1 Mechanical shift, pneumatic assist pilot valve for diaphragm pump |
| 01/16/1990 | US4893655 Double valve mechanism for an acoustic modulator |
| 12/26/1989 | USRE33135 Pump apparatus |
| 11/02/1989 | WO1989010485A1 Pneumatic valve, particularly for control of compressed-air-operated membrane pumps |
| 10/03/1989 | US4871302 Apparatus for removing fluid from the ground and method for same |
| 10/03/1989 | US4870891 Pneumatically controlled air motor |
| 09/19/1989 | US4867654 Fluid-driven pump |
| 09/19/1989 | US4867653 Diaphragm pump |
| 08/10/1989 | WO1989007201A1 Apparatus for removing fluid from the ground and method for same |
| 08/08/1989 | US4854832 Mechanical shift, pneumatic assist pilot valve for diaphragm pump |
| 07/13/1989 | WO1989006316A1 Improved fluid-driven pump |
| 07/11/1989 | US4846045 Expansible chamber motor |
| 06/13/1989 | CA1255552A1 Pneumatic control assembly for a pneumatic cylinder |
| 05/24/1989 | EP0316638A1 Pneumatically or hydraulically driven piston pump |
| 04/04/1989 | US4818191 Double-acting diaphragm pump system |
| 03/14/1989 | US4812109 Apparatus for driving piston by fluid pressure |
| 02/22/1989 | EP0304210A2 Double diaphragm pumps |
| 01/12/1989 | DE3720674A1 Control valve arrangement for a pneumatic axial motor |
| 12/13/1988 | CA1246388A1 Double-diaphragm pumps |
| 12/06/1988 | US4789131 Pilot valve |
| 10/25/1988 | US4780065 Cylinder pump having an air sensor activated reversing valve |
| 10/25/1988 | US4780064 Pump assembly and its method of operation |
| 10/11/1988 | CA1242977A1 Reverse osmosis hand pump |
| 08/23/1988 | US4765509 Pumping system |
| 05/25/1988 | EP0268458A2 Apparatus for driving piston by fluid pressure |
| 04/05/1988 | US4735051 Double admitting pressure intensifier |
| 04/05/1988 | CA1234720A1 Dual diaphragm pump |
| 02/16/1988 | US4724801 Hydraulic valve-operating system for internal combustion engines |
| 11/24/1987 | US4708601 Dual diaphragm pump |
| 11/24/1987 | US4708165 High pressure stepped clearance seal valve in a cryogenic refrigeration system |
| 11/24/1987 | US4708053 Reciprocating piston fluid powered motor |
| 10/27/1987 | US4702147 Engine with pneumatic valve actuation |
| 10/20/1987 | US4701112 Pumping system |
| 09/24/1987 | DE3609533A1 Hydraulic oscillating valve |
| 09/23/1987 | EP0237677A1 Diaphragm pump |
| 09/02/1987 | EP0234798A2 Pump |
| 08/26/1987 | CN87100647A Pump assembly and its method of operation |
| 07/14/1987 | US4679490 Oscillator reciprocation control system for piston motor |
| 04/21/1987 | US4659294 Hydrualic pressure amplifier |
| 03/24/1987 | US4651625 Pneumatic control assembly for a pneumatic cylinder |
| 03/04/1987 | EP0212369A2 Pneumatically operated lubrication pump |
| 12/30/1986 | US4632013 Reciprocating piston fluid powered motor |
| 11/25/1986 | US4624628 Double-diaphragm pumps |
| 08/27/1986 | EP0192580A1 Intensifier of liquid pressure |
| 06/10/1986 | US4593712 Pilot control valve |
| 05/21/1986 | EP0181756A1 Improvements relating to double-diaphragm pumps |
| 05/07/1986 | EP0103596B1 Fluid actuator for cryogenic valve |
| 04/08/1986 | US4580590 Automatic air valve assembly |
| 02/26/1986 | EP0172367A2 Dual diaphragm pump |
| 02/12/1986 | EP0171371A2 Pump apparatus |
| 01/28/1986 | US4566867 Dual diaphragm pump |
| 12/18/1985 | EP0164935A1 A pneumatic control assembly for a pneumatic cylinder |
| 08/13/1985 | US4534713 For filtering a liquid |
| 04/30/1985 | US4513653 Automatic hydraulic reversing valve for a double-action working cylinder |
| 04/10/1985 | EP0136366A1 Free piston pump |
| 04/09/1985 | US4509402 For use with a fluid pressure actuated motor |
| 03/20/1985 | EP0134779A1 Control device for a pressurized-fluid operated motor |
| 02/13/1985 | EP0132923A2 Valve for automatically directing a flow of fluid |
| 01/08/1985 | US4492147 Reciprocatory air motor with cushioning pistons |
| 01/01/1985 | US4491055 Control of continuous reciprocation of a fluid power cylinder |
| 12/27/1984 | CA1179920A Control of continuous reciprocation of a fluid power cylinder |
| 12/11/1984 | US4487107 Method of controlling revolution of drive shaft external combustion engine and Russin external combustion engine |
| 11/27/1984 | US4484638 Liquid inertia tool |
| 08/21/1984 | US4466251 Fluid actuator for cryogenic valve |
| 07/03/1984 | US4457331 Pulse hydraulic monitor |
| 05/15/1984 | US4448110 Hydraulic pump |
| 05/08/1984 | US4446773 Compressed air distributor for a reciprocating concrete breaking type machine |
| 04/24/1984 | CA1166075A1 Fluid-powered submersible sampling pump |
| 03/28/1984 | EP0103596A1 Fluid actuator for cryogenic valve. |
| 03/27/1984 | US4439112 Method and apparatus for pumping viscous and/or abrasive fluids |
| 03/20/1984 | CA1163860A1 Double diaphragm operated reversing valve pump |
| 01/31/1984 | CA1161334A1 Actuator valve |
| 01/17/1984 | US4425835 Fluid actuator |
| 01/03/1984 | US4424012 In-line fluid pump and shuttle valve therefor |
| 12/21/1983 | EP0029826B1 Pneumatic engine with piston slide |
| 11/01/1983 | US4412552 Method of controlling inlet valves of compression reactor and device for effecting same |
| 10/04/1983 | US4407643 Power fluid system embodying two-fluid pump |
| 09/27/1983 | US4406596 Compressed air driven double diaphragm pump |
| 09/01/1983 | WO1983002994A1 Fluid actuator for cryogenic valve |
| 08/30/1983 | US4401010 Variable-torque-accommodating machine |
| 08/16/1983 | CA1151978A1 Pneumohydraulic pumping station |
| 08/09/1983 | US4397614 Unbalanced spool |
| 08/09/1983 | CA1151679A1 Device for breaking a hard material |
| 08/02/1983 | CA1151004A1 Reciprocating fluid pump having a hall switch |
| 07/05/1983 | US4391571 Pumping apparatus for pumping liquids such as slurrys |
| 06/14/1983 | US4388049 Fluid supply system using one fluid medium to move a second fluid medium |
| 06/07/1983 | US4386888 Double diaphragm operated reversing valve pump |