| Patents for F01L 25 - Drive, or adjustment during operation, of distribution or expansion valves by non-mechanical means (555) |
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| 05/31/1983 | CA1147205A1 Tandem long stroke reciprocating mud pump assembly |
| 05/18/1983 | EP0016074B1 Pneumatically operated control valve for pneumatic control at low pressure and working pressure |
| 05/17/1983 | CA1146443A1 Impactor |
| 03/15/1983 | CA1142792A1 Dual pump assembly clamped together by inlet and outlet manifolds |
| 02/16/1983 | EP0072363A2 Steam-powered engine |
| 02/16/1983 | EP0071655A1 Pneumatically powered hydraulic pump |
| 02/15/1983 | US4373865 Reciprocating controls of a hydraulically driven piston gas compressor |
| 02/09/1983 | EP0070866A1 Fluid-pressure operated motors |
| 02/08/1983 | CA1140836A1 Pneumohydraulic pumping station |
| 01/11/1983 | US4368008 Reciprocating controls of a gas compressor using free floating hydraulically driven piston |
| 12/21/1982 | CA1137812A1 Hydraulic operated displacement pump |
| 12/15/1982 | EP0067048A2 A pump |
| 12/14/1982 | US4363451 Device for breaking a hard material |
| 12/14/1982 | US4363258 Hydraulic impactor |
| 12/07/1982 | CA1136936A1 Actuator valve |
| 11/02/1982 | US4356842 Control valve set for a completely pneumatical low- and operation pressure control |
| 10/06/1982 | EP0061706A1 Air-pressure actuated double-diaphragm pump |
| 09/07/1982 | US4348161 Pressure converting apparatus |
| 08/19/1982 | WO1982002743A1 Fluid-pessure operated motors |
| 08/17/1982 | US4344353 Hammer |
| 08/10/1982 | US4343597 Reciprocating fluid pump having a hall switch |
| 07/20/1982 | US4339985 Air driven reciprocating device |
| 07/13/1982 | CA1127402A1 Refrigerant motor |
| 02/09/1982 | US4314447 Refrigerant motor |
| 12/08/1981 | US4304527 System for pumping an abrasive or corrosive fluid |
| 12/01/1981 | US4303002 Hand-operated pneumatic impact machine |
| 11/12/1981 | WO1981003130A1 Method and device for controlling inlet valves of a compressiontype chemical reactor |
| 10/28/1981 | EP0038618A1 Actuator valve |
| 10/27/1981 | US4296672 Reciprocating piston-cylinder combination and valving control therefor |
| 10/20/1981 | US4295801 Fluid-powered submersible sampling pump |
| 10/20/1981 | US4295411 Impactor |
| 10/06/1981 | US4292804 Method and apparatus for operating an engine on compressed gas |
| 10/01/1981 | WO1981002769A1 Pneumohydropumping installation |
| 09/03/1981 | WO1981002448A1 Hydro-pneumatic installation |
| 08/06/1981 | WO1981002183A1 Slant axis rotary piston mechanism |
| 08/05/1981 | EP0033026A2 Slant axis rotary piston machine |
| 07/08/1981 | EP0031617A1 Reciprocating positive displacement machine |
| 06/30/1981 | US4276001 Fluid pump assembly |
| 06/09/1981 | US4271989 Micro-metering system |
| 05/12/1981 | CA1100813A1 Positive displacement constant flow pump |
| 04/29/1981 | EP0027784A1 A device for breaking a hard material |
| 04/21/1981 | US4262695 Flow rate control valve |
| 01/27/1981 | US4247264 Air driven diaphragm pump |
| 01/07/1981 | EP0020436A1 Pumping apparatus for pumping liquids such as slurrys |
| 01/06/1981 | US4242941 Actuator valve |
| 01/06/1981 | US4242940 Fluid operated control device |
| 12/30/1980 | US4242057 Tandem long stroke reciprocating mud pump assembly |
| 12/30/1980 | US4241641 Pilot assembly for hydraulic pumps |
| 12/23/1980 | US4240328 Valve mechanism for a hydraulic expansible chamber motor |
| 12/11/1980 | WO1980002722A1 Pneumatic engine with piston slide |
| 10/29/1980 | EP0018143A1 Air driven diaphragm pump |
| 10/28/1980 | US4230019 Fluid arrangement |
| 10/01/1980 | EP0016074A1 Pneumatically operated control valve for pneumatic control at low pressure and working pressure. |
| 09/23/1980 | US4224013 Automobile vacuum system for inflating tires |
| 08/26/1980 | CA1084288A1 Liquid dosing apparatus |
| 06/17/1980 | US4207801 Hydraulic oscillatory devices |
| 05/01/1980 | WO1980000867A1 Pumping apparatus for pumping liquids such as slurrys |
| 04/08/1980 | CA1075079A1 Pump for fluent, and especially heavy and abrasive materials |
| 04/01/1980 | US4195752 Apparatus for the essentially uniform feed of a fluent medium by means of reciprocating feed pistons |
| 03/11/1980 | US4192219 Hydraulic actuator |
| 02/21/1980 | WO1980000269A1 Assembly of control valves for pneumatic control at low pressure and working pressure |
| 02/20/1980 | EP0007945A1 Diaphragm pumps |
| 01/01/1980 | US4181066 Expansible chamber motor |
| 12/04/1979 | US4176586 Piston and cylinder device |
| 10/09/1979 | USRE30109 Hydroacoustic apparatus and valving mechanisms for use therein |
| 10/09/1979 | CA1063871A1 Fluid operated hydraulic pump including an improved hydraulic fluid pressure release assembly |
| 09/18/1979 | CA1062585A1 Hydraulic oscillatory devices |
| 09/04/1979 | CA1061642A1 Fluid operated hydraulic pump including noise reduction means |
| 07/17/1979 | US4161308 Switching valve assembly for fluid motor-driven injector pump |
| 07/17/1979 | US4161134 Fluid pressure circuit for periodic operation of fluid pressure operable drive means |
| 06/12/1979 | CA1056208A1 Double-action proportioning pump |
| 05/22/1979 | US4155287 Hydraulically operated impact devices |
| 04/19/1979 | WO1979000197A1 Diaphragm pumps |
| 03/06/1979 | US4142447 Hydraulic actuator |
| 02/27/1979 | US4141467 Fluid driven liquid dosing apparatus |
| 02/27/1979 | CA1049271A1 Starting method and system for a gas turbine machine |
| 02/13/1979 | CA1048372A1 Device for damping the recoil of a work tool connected to a percussion tool |
| 02/06/1979 | CA1047883A1 Hydraulically driven striking device |
| 01/30/1979 | CA1047366A1 Paint pump for airless spray guns |
| 01/30/1979 | CA1047311A1 Fluid operated hydraulic pump |
| 12/12/1978 | US4129147 Control valve |
| 10/31/1978 | US4123204 Double-acting, fluid-operated pump having pilot valve control of distributor motor |
| 10/24/1978 | US4121499 Switching mechanism |
| 10/10/1978 | US4119113 Double-action proportioning pump |
| 09/26/1978 | US4116364 Dispensing system for low stability fluids |
| 09/19/1978 | US4114515 Adjustable self-reciprocating operator |
| 09/19/1978 | CA1038725A1 Hydraulic percussion device |
| 08/29/1978 | CA1037352A1 Impact tool |
| 08/08/1978 | US4105373 Fluid distributor device for controlling an apparatus for pumping wet concrete and the like |
| 08/01/1978 | US4104008 Pump having fluid-actuated motor controlled by fluid-actuated distributor |
| 07/25/1978 | US4102609 Valve control system for air powered vacuum pump |
| 07/18/1978 | US4100977 Drop hammers |
| 06/06/1978 | US4093406 Fluid operated hydraulic pump including noise reduction means |
| 05/16/1978 | US4089380 Hammer having fluid biased work member |
| 05/02/1978 | US4087210 Hydraulic pumping device with pneumatic actuation |
| 04/25/1978 | US4085655 Control for reciprocating pumps or the like |
| 04/18/1978 | US4084923 Double-acting, downhole pump assembly |
| 04/18/1978 | US4084486 Hydraulically driven striking device |
| 04/04/1978 | US4082032 Control of hydraulically powered equipment |
| 03/21/1978 | US4080111 High volume, double acting downhole pump |