| Patents for F16D 31 - Fluid couplings or clutches with pumping sets of the volumetric type, i.e. in the case of liquid passing a predetermined volume per revolution (2,451) |
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| 02/04/1993 | WO1993002298A1 Device for hydrostatically regulating the rotation of an output shaft |
| 01/19/1993 | US5179889 Radial piston engine |
| 01/13/1993 | EP0224478B1 Load sensing circuit of load responsive direction control valve |
| 01/12/1993 | US5177966 Fluid pump arrangement with flow regulation feature |
| 11/10/1992 | US5162024 Rotational speed differential responsive type control coupling |
| 11/09/1992 | WO1992019881A1 Hydraulic slider coupling |
| 10/13/1992 | US5154252 Power transmission apparatus for vehicle |
| 09/30/1992 | EP0506015A1 Torque transmission device of a four-wheel drive vehicle |
| 09/15/1992 | CA1307409C Hydrostatic torque converter |
| 09/08/1992 | US5145043 Hydraulic clutch |
| 08/11/1992 | US5137130 Controlled type rotation speed difference sensitive coupling |
| 08/11/1992 | US5137129 Variable speed transmission |
| 06/30/1992 | CA1304272C Fluid powered motor-generator apparatus |
| 06/24/1992 | EP0491060A1 Hydraulic clutch |
| 06/09/1992 | US5120200 Hydraulic drive assembly |
| 06/02/1992 | US5117956 Hydraulic transmission coupling apparatus |
| 05/21/1992 | DE4138074A1 Torque distribution controller for rear-wheel-drive vehicle - operates on clutches transmitting torque to respective wheels with suitable differential rotational speed for curve negotiation |
| 04/28/1992 | US5107973 Non-stage transmission |
| 04/14/1992 | US5103642 Rotary shaft coupler with rotary valve plate position dependent on direction of shaft rotation |
| 03/11/1992 | EP0272319B1 A fluid powered motor-generator apparatus |
| 01/29/1992 | EP0468493A1 Hydrostatic device for transmission of rotation |
| 12/24/1991 | US5074825 Hydraulic transmission coupling apparatus |
| 12/11/1991 | EP0460400A1 Power transmission apparatus for vehicle |
| 11/27/1991 | EP0458218A1 Non-stage transmission |
| 09/26/1991 | DE4009063A1 Engine cooling fan driven by gear tooth motor - has speed controlled by pressure disc |
| 08/27/1991 | US5042630 Constant speed drive gear motor differential |
| 08/22/1991 | DE4004932A1 Radial fluid pressure motor - has cam and roller operated pistons with piston ring at piston base carrying turning moment |
| 08/06/1991 | US5037353 Hydraulic power transmission joint which is used in vehicles |
| 07/09/1991 | CA1285887C Mechanical power regeneration system |
| 06/18/1991 | US5024309 Rotational speed differential responsive type control coupling |
| 05/28/1991 | US5018351 Hydromechanical drive |
| 05/14/1991 | US5014837 Impulse torque converter |
| 02/26/1991 | US4995491 Power transmission apparatus |
| 01/01/1991 | US4981201 Variable drive apparatus |
| 12/25/1990 | US4980521 Power transmission apparatus |
| 12/12/1990 | EP0401774A1 Hydraulic transmission coupling apparatus |
| 11/22/1990 | EP0398124A1 Controlled type rotation speed difference sensitive coupling |
| 09/26/1990 | EP0388876A2 Hydraulic transmission coupling apparatus |
| 09/25/1990 | US4958711 Torque transmitting assembly |
| 09/18/1990 | CA1274105A1 Power control for hydrostatic transmission |
| 08/28/1990 | US4951790 Hydraulic power transmission device |
| 07/19/1990 | DE4001070A1 Hydraulic power-transmission clutch |
| 07/05/1990 | DE3839766A1 Hydrostatic transmission |
| 06/12/1990 | US4932510 Vehicle speed responsive variable torque transmitting assembly |
| 05/02/1990 | EP0365824A1 Rotational speed differential responsive type control coupling |
| 05/01/1990 | US4921085 Rotational speed differential responsive type joint |
| 04/24/1990 | US4919248 Drive coupling unit |
| 03/06/1990 | US4905807 Rotary vibration damper |
| 01/31/1990 | CN1039292A Bearing for converting motions |
| 01/08/1990 | EP0224478A4 Load sensing circuit of load responsive direction control valve. |
| 12/26/1989 | US4888949 Propulsion system for a small vehicle |
| 12/12/1989 | US4885956 Power transmission |
| 12/05/1989 | US4884995 Hydraulic torque impulse generator |
| 11/21/1989 | US4881626 Power transmission apparatus for vehicle of four-wheel drive type |
| 08/08/1989 | US4854916 Hydraulic torque impulse generator with bypass mechanism |
| 07/25/1989 | US4850447 Power transmission apparatus for a vehicle |
| 06/21/1989 | EP0320857A2 Hydromechanical drive system, such as a coupling, transmission or the like |
| 04/12/1989 | EP0310962A2 Rotational speed differential responsive type joint |
| 02/22/1989 | EP0304380A2 Borescope or endoscope with fluid dynamic muscle |
| 02/15/1989 | EP0303239A2 Device for modifying the delivery of a damping fluid for a rotational vibration damper |
| 01/24/1989 | CA1249202A1 Load sensing circuit of load responsive direction control valve |
| 01/03/1989 | US4795014 Power transmission apparatus |
| 01/03/1989 | US4794912 Borescope or endoscope with fluid dynamic muscle |
| 12/06/1988 | US4788820 Hydraulic circuit for large crane |
| 11/09/1988 | EP0290411A2 Hydraulic torque impulse generator |
| 10/26/1988 | EP0287801A2 Hydraulic turbine system |
| 09/29/1988 | DE3709262A1 Hydraulic coupling |
| 09/28/1988 | EP0284393A2 Hydraulic transmission |
| 09/28/1988 | EP0272319A4 A fluid powered motor-generator apparatus. |
| 09/13/1988 | US4770651 Hydraulically controlled shaft coupling |
| 08/31/1988 | EP0279891A1 Power transmission apparatus for vehicle |
| 08/30/1988 | US4767379 Hydraulic torque impulse generator |
| 06/29/1988 | EP0272319A1 A fluid powered motor-generator apparatus. |
| 06/07/1988 | US4748808 Fluid powered motor-generator apparatus |
| 06/07/1988 | CA1237674A1 Hydraulic turbine system |
| 05/31/1988 | US4747266 Hydromotor |
| 05/24/1988 | US4745746 Power control for a hydrostatic transmission |
| 05/11/1988 | EP0267169A2 Hydraulic torque impulse generator |
| 03/23/1988 | EP0260496A2 Power transmission apparatus for vehicle of four-wheel drive type |
| 01/19/1988 | CA1231621A1 Hydrostatic transmission with fixed fluid capacity ratio between pump and motor |
| 01/12/1988 | US4718378 For the cooling fan of an internal combustion engine |
| 10/28/1987 | EP0243334A1 Hydraulic torque impulse generator with bypass means |
| 09/29/1987 | US4696148 Hydraulic power transmission system |
| 09/02/1987 | EP0234631A1 Hydromotor |
| 08/06/1987 | DE3602326A1 Hydraulic slip limitation |
| 07/22/1987 | EP0229436A1 Friction-less hydraulic clutch device |
| 07/14/1987 | US4679396 Engine control systems |
| 06/23/1987 | US4674615 Hydraulic clutch #III |
| 06/10/1987 | EP0224478A1 Load sensing circuit of load responsive direction control valve. |
| 06/09/1987 | US4671137 Drive device of variable transmission ratio, particularly for operating an internal combustion engine supercharger |
| 06/02/1987 | US4669267 Hydrostatic hydraulic transmission |
| 04/01/1987 | EP0216540A1 Rotary power transmission apparatus |
| 02/25/1987 | EP0211597A1 Transmission coupling |
| 12/09/1986 | US4627237 Hydrostatic transmission with fixed fluid capacity ratio between pump and motor |
| 11/18/1986 | CA1214088A1 Engine control systems |
| 09/12/1986 | WO1986005245A1 Load sensing circuit of load responsive direction control valve |
| 09/09/1986 | US4610194 Load sensing circuit of load responsive direction control valve |
| 07/01/1986 | US4597483 Hydrostatic clutch |
| 04/15/1986 | US4581896 Infinitely variable hydraulic transmission |
| 04/01/1986 | US4578948 Reversible flow vane pump with improved porting |