| Patents for F15B 21 - Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass (10,959) |
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| 10/28/1981 | EP0038329A1 Pneumatic diaphragm valve pulsator |
| 10/13/1981 | US4294328 Device for emitting acoustic waves in a liquid medium by implosion |
| 10/06/1981 | US4292886 Hydraulic actuator cushioning device improvement |
| 09/02/1981 | EP0034900A1 Civil engineering and construction machinery with hydraulic drive system |
| 08/27/1981 | EP0025053A4 Fluidic oscillator device. |
| 08/20/1981 | WO1981002335A1 A fluid device |
| 08/18/1981 | CA1107174A1 Hydraulic system with unloading valve assembly |
| 08/04/1981 | USRE30698 Hydraulic fluids comprising orthosilicate esters |
| 08/04/1981 | US4281588 Reciprocating piston fluid powered motor |
| 06/30/1981 | CA1104033A1 Pressure and flow compensated control system with constant torque and viscosity sensing over-ride |
| 06/02/1981 | CA1102136A1 Rotary snubber for linear actuator |
| 05/27/1981 | EP0029223A2 Hydraulic service system for a pulsating press |
| 05/05/1981 | CA1163524B Automatic bleeder valve |
| 05/05/1981 | CA1100386A1 Automatic bleeder valve |
| 04/29/1981 | EP0027784A1 A device for breaking a hard material |
| 04/22/1981 | EP0027436A1 Safety device at remote control of hydraulic or pneumatic machine tools |
| 04/22/1981 | EP0027435A1 Device for remote control of hydraulic or pneumatic machine tools |
| 04/07/1981 | CA1098779A1 Fluid pressure cylinder convertible for use with or without internal bumpers |
| 04/01/1981 | EP0025910A1 Process and apparatus for the degasification of compressed fluid in a hydraulic system |
| 03/18/1981 | EP0025053A1 Fluidic oscillator device. |
| 03/11/1981 | EP0024748A2 Construction and/or application in relation to the generation or the use of pressures, forces, flows and movements in and by means of hydraulic or hydro-pneumatic systems |
| 03/03/1981 | CA1096750A1 Hydraulic system with unloading valve assembly |
| 02/10/1981 | US4249558 Bypass valve |
| 01/22/1981 | WO1981000064A1 Pneumatic diaphragm valve pulsator |
| 01/20/1981 | US4245673 Pneumatic logic circuit |
| 01/20/1981 | US4245665 Fluid heater for pneumatic control mechanisms |
| 01/14/1981 | EP0022394A1 Method and device for controlling the degassing of a hydraulic circuit |
| 01/07/1981 | EP0022104A2 Control system for limiting the power output of a hydraulic servomotor assembly |
| 01/07/1981 | EP0020563A1 Motor-valve apparatus for hydraulic fan drive system. |
| 01/06/1981 | US4242946 Fluid pressure cylinder convertible for use with or without internal bumpers |
| 01/06/1981 | CA1092945A1 Arrangement for driving the hose-carrying drum of a device for sprinkling large areas with fluid |
| 01/06/1981 | CA1092942A1 Delaying control for hydraulic motors |
| 12/23/1980 | US4240326 Hydraulic vibration exciter and method of cooling thereof |
| 12/09/1980 | US4237932 Control arrangement for a damper |
| 11/28/1980 | EP0020563A4 Motor-valve apparatus for hydraulic fan drive system. |
| 11/25/1980 | US4235155 Delaying control for hydraulic motors |
| 11/25/1980 | CA1090233A1 Hydraulic control |
| 11/25/1980 | CA1090230A2 Controls for hydraulic percussion drill |
| 11/18/1980 | US4233885 Apparatus for improved motion control |
| 11/04/1980 | US4231519 Fluidic oscillator with resonant inertance and dynamic compliance circuit |
| 10/15/1980 | EP0016862A1 Control device for a hydraulic system |
| 09/18/1980 | WO1980001884A1 Fluidic oscillator with resonant inertance and dynamic compliance circuit |
| 09/17/1980 | EP0015296A1 Device for remote control of hydraulic cranes |
| 09/02/1980 | US4220173 Time delay fluid valve |
| 09/02/1980 | US4220015 Hydraulic fluid cooling system |
| 08/26/1980 | US4218886 Hydraulic power packs |
| 08/26/1980 | US4218885 Hydraulic power packs |
| 08/26/1980 | CA1084361A1 Timing device for a fluid signal and fluid actuator therefor |
| 08/26/1980 | CA1084360A1 Press unloader with defrost and water drain valve |
| 07/29/1980 | US4214506 Hydraulic control arrangement with at least one multiple position valve |
| 07/08/1980 | US4211080 Hydraulic power packs |
| 07/08/1980 | CA1081277A1 Reinforced radiator mounting for heavy vehicles |
| 07/01/1980 | US4209984 Hydraulic system with unloading valve assembly |
| 06/12/1980 | WO1980001191A1 Motor-valve apparatus for hydraulic fan drive system |
| 06/03/1980 | US4205592 Hydraulic control system |
| 05/27/1980 | US4204458 Pulsator for hydraulic systems controlling actuating mechanisms |
| 05/20/1980 | US4203287 Power steering hydraulic system with a low pressure expansible reservoir |
| 05/14/1980 | EP0010860A1 Load sensing control for hydraulic system |
| 05/13/1980 | CA1077407A1 Filter arrangement with allowances for manufacturing tolerances |
| 04/29/1980 | US4199942 Load sensing control for hydraulic system |
| 04/22/1980 | CA1076000A1 Hydraulic apparatus |
| 04/15/1980 | CA1075796A1 Hydraulic steering limitation system |
| 04/08/1980 | US4197097 Apparatus for venting gas from afluid system |
| 02/26/1980 | US4189919 Motor-valve apparatus for hydraulic fan drive system |
| 02/21/1980 | WO1980000268A1 Device for remote control of hydraulic cranes |
| 02/05/1980 | US4186771 Hydraulic control apparatus |
| 01/29/1980 | CA1070819A1 Implosion acoustic impulse generator |
| 12/25/1979 | US4179888 Hydraulic fan drive system |
| 12/13/1979 | WO1979001084A1 Hydraulic fan drive system |
| 12/11/1979 | CA1067887A1 Hydrocarbon/silicone oil lubricating compositions for low temperature use |
| 12/04/1979 | US4176522 Torque monitor |
| 12/04/1979 | CA1067606A1 Method and apparatus for controlling an hydraulic cylinder |
| 12/04/1979 | CA1067478A1 Control arrangement for a damper |
| 11/06/1979 | CA1065700A1 Pressure control device for equipment having rolls |
| 10/09/1979 | US4170113 Hydraulic system with unloading valve assembly |
| 09/11/1979 | US4167199 Timing device for pneumatic signals |
| 08/28/1979 | US4165674 Contact free device for limiting the relative movement of hydraulically actuated members |
| 08/14/1979 | CA1060310A1 Hydraulic vibration exciter and method of cooling thereof |
| 07/03/1979 | CA1057624A2 Control system for wheeled vehicles |
| 07/03/1979 | CA1057623A2 Control system for wheeled vehicles |
| 07/03/1979 | CA1057622A2 Control system for wheeled vehicles |
| 06/28/1979 | WO1979000361A1 Improved fluidic oscillator and spray-forming output chamber |
| 05/15/1979 | US4154160 Pressure control device for a processing machine with rolls |
| 05/15/1979 | US4154147 Press unloader with defrost and water drain valve |
| 04/24/1979 | US4150686 Electrohydraulic control module |
| 03/27/1979 | CA1051488A1 Control device for air brakes of railway vehicles |
| 03/27/1979 | CA1051268A1 Track tamper and vibratory drive mechanism |
| 02/06/1979 | US4137982 Reinforced radiator mounting for heavy vehicles |
| 02/06/1979 | CA1047934A1 Noise enclosure for hydraulic valve |
| 02/06/1979 | CA1047886A1 Valve and pump control for a hydraulic system |
| 01/30/1979 | US4136600 Arrangement for controlling the speed of a hydraulic motor |
| 01/09/1979 | CA1045945A1 Hydraulic system for extremely cold environments |
| 01/02/1979 | CA1045512A1 Suspension and control linkage for a grader blade support frame |
| 11/28/1978 | US4126993 Hydraulic system for an earth-moving machine and a temperature-controlled valve for a hydraulic system |
| 11/14/1978 | CA1042489A1 Method of bleeding a hydraulic system, and means therefor |
| 10/17/1978 | US4120321 Timing device for a fluid signal and fluid actuator therefor |
| 10/17/1978 | US4120233 Hydraulic control system for at least two consumers |
| 10/03/1978 | CA1039622A1 Hydraulic system |
| 09/12/1978 | US4113621 Hydraulic apparatus |
| 09/12/1978 | US4112823 Methods and apparatus for controlling an hydraulic cylinder |