| 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) |
|---|
| 08/22/1978 | CA1036900A1 Hydraulic system for electric lift trucks |
| 08/15/1978 | CA1036459A1 System for operating hydraulic apparatus |
| 08/01/1978 | US4104507 PTC heater for enhancing thermal actuator response |
| 07/04/1978 | US4098597 Glassware forming machine |
| 06/13/1978 | US4094365 Electrohydraulically operated portable power tool |
| 05/23/1978 | US4090532 Timer controlled valve |
| 05/16/1978 | US4089621 Selectively pressurized tank for hydraulic fluid |
| 02/07/1978 | US4072172 Pneumatic timing device |
| 01/31/1978 | US4070859 Thermal fluid displacement actuator |
| 01/10/1978 | US4067195 Fluid-borne noise-suppressor for hydraulic pump |
| 01/03/1978 | US4065922 Load lifting and lowering control system |
| 12/27/1977 | US4064903 Noise enclosure for hydraulic valve |
| 11/22/1977 | US4059042 Hydraulic system for extremely cold environments |
| 11/01/1977 | US4056480 Hydraulic fluids |
| 09/27/1977 | US4051053 Hydraulic fluids comprising orthosilicate esters |
| 08/02/1977 | US4038823 Method of bleeding a hydraulic system and means therefor |
| 07/26/1977 | US4038051 Air cleaner and dryer |
| 07/26/1977 | US4037697 Hydraulic clutch actuating system |
| 07/26/1977 | US4037519 Hydraulic system |
| 07/12/1977 | US4035300 Filter arrangement with allowances for manufacturing tolerances |
| 06/28/1977 | US4031813 Hydraulic actuator controls |
| 06/21/1977 | US4030381 Hydraulic control device for automatic change-speed transmissions |
| 06/07/1977 | US4027595 Hydraulic apparatus |
| 05/31/1977 | US4026110 Device for temperature compensation in a pressure medium circuit |
| 05/10/1977 | US4022021 Constant speed hydraulic motor |
| 04/19/1977 | US4018249 Timing device for pneumatic control |
| 04/12/1977 | US4016903 Pilot operated pressure and vacuum relief valve |
| 04/12/1977 | US4016722 Safety blow-out protection for fluid actuators |
| 03/15/1977 | US4012175 Valve and pump control for a hydraulic system |
| 03/01/1977 | US4009572 Hydrostat systems containing coaxial multidirectional flow control valves |
| 02/22/1977 | US4008571 Hydraulic system for electric lift trucks |
| 01/18/1977 | US4003397 Dual coaxial bidirectional valves and filter assemblies and hydrostat systems containing the same |
| 12/14/1976 | US3996958 Hydraulic valve aspirator |
| 12/07/1976 | US3996137 Filter assemblies containing coaxial bidirectional flow control and relief valves |
| 12/07/1976 | US3995703 Electrohydraulically operated portable power tool |
| 12/07/1976 | US3995530 Shaking machine |
| 10/26/1976 | US3987702 Method and device for electrohydraulic control of a hydraulic actuator |
| 10/12/1976 | US3985652 Dual coaxial bidirectional valves and filter assemblies and hydrostat systems containing the same |
| 08/24/1976 | US3976124 Cooling-controlled tank for hydraulic fluid |
| 08/24/1976 | US3975992 Lift control system for press unloader or the like |
| 07/20/1976 | US3969897 Temperature-control arrangement for a pair of hydraulic motors |
| 06/15/1976 | US3963045 Cushion control accessory for pneumatic or hydraulic cylinders |
| 06/01/1976 | US3960174 Hydraulic circuit with dual tank system and method for using the same |
| 06/01/1976 | US3959968 Steering valve with linear spool dampening |
| 05/25/1976 | US3958420 Air extracting system for hydraulic steering apparatus |
| 05/18/1976 | US3956891 Closed center hydraulic system for lift trucks |
| 04/06/1976 | US3948147 Hydraulic system with air-venting arrangement |
| 03/30/1976 | US3947744 Electric truck having elevated load potential energy recovery with means to adjust rate of carriage descent |
| 03/30/1976 | US3946562 Hydraulic system cavitation suppressor |
| 03/23/1976 | US3945465 Multi-function air treatment unit |
| 03/23/1976 | US3945208 Filtration for integrated tractor hydraulic system |
| 03/23/1976 | US3945207 Hydraulic propulsion system |
| 03/16/1976 | US3943973 Control system |
| 03/16/1976 | US3943972 System for conserving compressed air supply |
| 03/09/1976 | US3942558 Torsional reed reference fluidic oscillator |
| 02/10/1976 | US3937252 Impulse signal producing device of the pneumatic pressure type |
| 01/27/1976 | US3934990 Air cooler and cleaner for compressed air |
| 01/27/1976 | US3934601 Method of and arrangement for feeding pressure fluid in pulses |
| 01/13/1976 | US3931832 Timing device for pneumatic control systems |