| 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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| 06/09/1998 | US5762792 For surface filtration of hydraulic oils without causing large pressure loss |
| 06/03/1998 | EP0845398A2 Pressure regulator for installation of compressed air production for vehicles |
| 06/02/1998 | US5758499 Hydraulic control system |
| 05/28/1998 | DE19647994A1 Load-sensitive hydraulic control for e.g. waste disposal vehicles |
| 05/27/1998 | EP0789816B1 Energy recovery device |
| 05/22/1998 | WO1998021488A1 Servicing apparatus for treating compressed air |
| 05/22/1998 | WO1998021486A1 Check valve |
| 05/22/1998 | WO1998021484A1 Valve system and manufacture of same |
| 05/22/1998 | CA2271017A1 Valve system and manufacture of same |
| 05/22/1998 | CA2269645A1 Check valve assembly |
| 05/21/1998 | CA2221655A1 Method and apparatus for adjusting force to change or modify the amount of energy required to move an actuator |
| 05/20/1998 | EP0785861B1 Hydraulic press drive |
| 05/14/1998 | DE19745810A1 Free-piston IC engine for compact city vehicle |
| 05/14/1998 | DE19734479A1 Rückschlagventilanordnung Check valve assembly |
| 05/14/1998 | DE19707722A1 Ventilanordnung und Verfahren zur Ansteuerung einer derartigen Ventilanordnung Valve assembly and method for controlling such a valve arrangement |
| 05/14/1998 | DE19646443A1 Check valve for farm tractor lifting gear |
| 05/13/1998 | EP0841506A2 Hydrostatic transmission |
| 05/12/1998 | US5749391 Condensate drainage system for pneumatic tanks |
| 05/07/1998 | WO1998019074A1 Removal of air from hydraulic system |
| 05/06/1998 | EP0840020A2 Hydraulic jack |
| 04/30/1998 | WO1998017514A1 Hydraulic unit |
| 04/30/1998 | DE19747620A1 Tandem pump device for preventing cavitation |
| 04/29/1998 | EP0837991A1 A method in a pneumatic oscillating device to observe an obstacle and to continue oscillating and corresponding oscillating device |
| 04/29/1998 | EP0728263B1 Method of cooling the hydraulic fluid in the working circuit of a construction machine, in particular a hydraulic excavator |
| 04/28/1998 | US5744034 Hydraulic circuit |
| 04/28/1998 | US5743292 Pressure actuated check valve |
| 04/23/1998 | DE19746230A1 Energy conversion system |
| 04/23/1998 | DE19643289A1 Hydraulikaggregat Hydraulic unit |
| 04/16/1998 | WO1998015437A2 Method for flushing heavy equipment hydraulic systems |
| 04/14/1998 | US5737920 Means for improving the prevention of icing in air motors |
| 04/09/1998 | DE19615741A1 Open/closed loop control of several functional blocks e.g. of air-conditioning or central locking unit |
| 04/08/1998 | CN2278108Y 液压自动接头 Hydraulic automatic fittings |
| 04/02/1998 | WO1998013603A1 Hydraulic oil recovery/reutilization system |
| 04/02/1998 | DE19647073C1 Wartungsgerät zur Druckluftaufbereitung Maintenance equipment for compressed air preparation |
| 04/01/1998 | EP0764241B1 Hydraulic power cylinder |
| 03/31/1998 | US5732740 In a hydraulic fluid line |
| 03/19/1998 | WO1998011358A1 Electrohydraulic system and apparatus with bidirectional electric-motor hydraulic-pump unit |
| 03/18/1998 | EP0829648A1 Method and device for determining the amount of undissolved gas in a hydraulic system |
| 03/18/1998 | EP0829445A1 Energy recovery drive and control device for the down ride phase of electrohydraulic working lifts |
| 03/18/1998 | EP0828946A1 Hdyraulic actuating unit |
| 03/18/1998 | EP0828944A1 Compressed air maintenance device |
| 03/18/1998 | EP0657018B1 Contactless inner coating measuring device and method for cast iron pipes |
| 03/18/1998 | EP0615583B1 Energy recovering device |
| 03/17/1998 | US5727390 Re-circulating hydraulic system |
| 03/12/1998 | WO1997049924A3 Improvements in, or relating to, high speed actuators and vibrators based on electro-rheological fluids |
| 03/11/1998 | CN2276091Y Portable hand pressure vacuum signal generator |
| 03/11/1998 | CN1175988A Electrohydraulic proportional control valve assemblies |
| 03/10/1998 | US5725618 Back washing and regenerating apparatus for diesel particulate filter |
| 03/10/1998 | US5725361 Hydraulic unit |
| 03/04/1998 | CN2275657Y Pressure compensated hydraulic cylinder sealing device |
| 03/03/1998 | US5722456 Hydraulic unit |
| 02/26/1998 | WO1998007992A2 Hydraulic actuator |
| 02/11/1998 | EP0706615A4 Power sensing regenerator |
| 02/05/1998 | DE19649498C1 Compressed air preparation device for road vehicle compressed air user |
| 02/04/1998 | EP0821766A1 Electrofluidic standard module and custom circuit board assembly |
| 01/29/1998 | WO1998003901A1 Current control apparatus |
| 01/22/1998 | WO1998002664A1 Process and device for determining working positions of a working device |
| 01/22/1998 | DE19730780A1 Electronic control system e.g. of hydraulic fluidic flow power valves system used for machine tools |
| 01/20/1998 | US5709085 Method of cooling the hydraulic fluid in the working circuit of a construction machine, in particular a hydraulic excavator |
| 01/20/1998 | US5709009 Door closer for the non-fire side of a fire-door safety installation |
| 01/14/1998 | EP0818629A1 Hydraulic actuator and process for venting a hydraulic actuator |
| 01/14/1998 | EP0817919A1 Hydraulic circuit |
| 01/08/1998 | DE19727358A1 Frequency modulated valve control apparatus |
| 01/07/1998 | EP0816576A1 Construction machine |
| 01/07/1998 | EP0814891A1 Air de-oiling element |
| 12/31/1997 | WO1997049924A2 Improvements in, or relating to, high speed actuators and vibrators based on electro-rheological fluids |
| 12/30/1997 | US5703345 Hydrostatic drive with data carrier control |
| 12/30/1997 | US5701618 Hydraulic system for hydraulically actuating an ambulance lifting table |
| 12/29/1997 | EP0680565B1 Hydraulic system with pump and load |
| 12/23/1997 | US5699830 Solenoid valve controller |
| 12/18/1997 | WO1997047510A1 Process for venting a hydraulic assisted steering system |
| 12/18/1997 | DE19622267C1 Vehicle IC engine control and regulation system for reversible hydraulic displacement pumps with maximum pressure limiting |
| 12/16/1997 | US5697287 Hydraulic power cylinder |
| 12/11/1997 | WO1997046760A1 Motor vehicle speed deterrent |
| 12/11/1997 | DE19653714C1 Control signals transmission device for controlled valves |
| 12/10/1997 | CN2270136Y Positive pressure isolating unit |
| 12/04/1997 | WO1997045252A1 Control device for hydraulically driven tool |
| 12/03/1997 | EP0809737A1 Electrohydraulic proportional control valve assemblies |
| 11/26/1997 | EP0809033A2 Pressure fluid cylinder having a ventilating element with axial elastomeric joint |
| 11/26/1997 | EP0727977B1 Hydraulic system for the hydraulic operation of an ambulance lifting platform |
| 11/26/1997 | EP0663046B1 Hydraulic system with pump and load |
| 11/26/1997 | CN1166192A Control device for construction machine |
| 11/25/1997 | US5691894 Cylinder positioning control apparatus |
| 11/19/1997 | EP0807221A1 Pressure reduction valve |
| 11/19/1997 | EP0807212A2 Device for actuating a hydrostatic drive |
| 11/18/1997 | US5687566 Arrangement and method for removal of air from a hydraulic system |
| 11/13/1997 | WO1997042417A1 Device for saving energy |
| 11/13/1997 | DE19719667A1 Hydraulic tensioner for IC-engine valve drive chain |
| 11/13/1997 | DE19617950A1 Kolbenspeicher mit Gasvorspannung Piston accumulators with gas pre |
| 11/04/1997 | US5683071 Pilot hydraulic system controller apparatus |
| 11/04/1997 | US5682743 During cold weather |
| 10/29/1997 | EP0803653A1 Pneumatic commandassembly |
| 10/29/1997 | CN2266050Y Hydraulic moment changing device |
| 10/28/1997 | US5682312 Self-adapting excavation control system and method |
| 10/28/1997 | US5681024 Microvalve |
| 10/28/1997 | US5680761 For driving a hydraulic pump |
| 10/28/1997 | US5680760 For a construction machine |
| 10/26/1997 | CA2203580A1 Pneumatic control system |
| 10/23/1997 | DE19614226A1 Unused mechanical energy recovery device for continuously variable transmission (CVT) and motor automatic transmission |
| 10/22/1997 | EP0802330A1 Spring clamping cylinder |