| Patents for F01L 21 - Use of working pistons or piston-rods as fluid-distributing valves or as valve-supporting elements, e.g. in free-piston machines (198) | |
|---|---|
| 08/1995 | |
| 08/31/1995 | DE19506184A1 Reciprocating piston engine powered by compressed air or other medium |
| 04/1995 | |
| 04/25/1995 | US5409355 Diaphragm pump |
| 10/1994 | |
| 10/18/1994 | US5355769 Sequentially operated cylinders with load holding valve integrated system |
| 09/1994 | |
| 09/29/1994 | WO1994021915A1 Pressure medium driven device performing linear motion |
| 08/1994 | |
| 08/04/1994 | WO1994017295A1 Method for absorbing the vibration of a free-piston engine and vibration-absorbed fre-piston engine |
| 05/1994 | |
| 05/18/1994 | EP0596977A1 Diaphragm pump. |
| 01/1994 | |
| 01/25/1994 | US5281108 Diaphragm pumps |
| 11/1993 | |
| 11/16/1993 | US5261311 Reciprocating hydraulic motor with a differential piston |
| 09/1993 | |
| 09/22/1993 | EP0560956A1 Oscillating piston motor and installation with an oscillating piston motor. |
| 08/1993 | |
| 08/10/1993 | US5233949 Two-stroke cycle engine having linear gear drive |
| 08/04/1993 | EP0321573B1 Reciprocation switching structure for pumps |
| 05/1993 | |
| 05/19/1993 | EP0541644A1 Reciprocating drive apparatus |
| 05/11/1993 | US5209152 Airfoil changeover device |
| 04/1993 | |
| 04/20/1993 | US5203251 Motor with spring elements formed on valve assembly |
| 04/15/1993 | WO1993007360A1 Oscillating piston motor and installation with an oscillating piston motor |
| 02/1993 | |
| 02/23/1993 | US5188518 Pumping device driven by a fluid driven reciprocating actuator |
| 02/18/1993 | WO1993003280A1 Diaphragm pump |
| 02/18/1993 | CA2114004A1 Diaphragm pump |
| 01/1993 | |
| 01/20/1993 | EP0524104A1 Hydraulic motor with reciprocating differential piston |
| 10/1992 | |
| 10/27/1992 | US5158046 Two-stroke cycle engine having linear gear drive |
| 10/21/1992 | EP0509616A2 Switching device for reciprocating pumps |
| 10/14/1992 | EP0508555A2 Switching device for reciprocating pumps |
| 10/07/1992 | EP0507071A1 Compression spring fluid motor |
| 09/1992 | |
| 09/30/1992 | EP0505667A1 A pneumatic drive means for a cleaning brush |
| 08/1992 | |
| 08/20/1992 | WO1992014041A1 Reciprocating air motor |
| 08/11/1992 | US5137435 Compression spring fluid motor |
| 06/1992 | |
| 06/10/1992 | EP0489005A1 Multicylinder self-starting uniflow engine |
| 06/09/1992 | US5120202 Switching device for reciprocating pumps |
| 06/03/1992 | EP0488781A1 Pumping device and containers fitted therewith |
| 05/1992 | |
| 05/06/1992 | EP0484307A1 A valve assembly |
| 02/1992 | |
| 02/20/1992 | WO1992002713A1 Reciprocating drive apparatus |
| 10/1991 | |
| 10/23/1991 | EP0489005A4 Multicylinder self-starting uniflow engine. |
| 09/1991 | |
| 09/03/1991 | US5044254 Reciprocating air motor |
| 03/1991 | |
| 03/26/1991 | US5002469 Switching device for reciprocating pumps |
| 03/26/1991 | US5002468 Switching device for reciprocating pumps |
| 01/1991 | |
| 01/10/1991 | WO1991000417A1 Diaphragm pumps |
| 08/1990 | |
| 08/14/1990 | US4947731 Multicyclinder self-starting uniflow engine |
| 08/07/1990 | US4945815 Pneumatic type of reciprocating movement device |
| 07/1990 | |
| 07/12/1990 | WO1990007630A1 Multicylinder self-starting uniflow engine |
| 07/03/1990 | US4938117 Multicylinder self-starting uniflow engine |
| 06/1990 | |
| 06/21/1990 | DE3842802A1 Double-piston assembly, especially internal combustion engine |
| 12/1989 | |
| 12/12/1989 | US4885978 Fluid-operated miniature engine |
| 11/1989 | |
| 11/14/1989 | US4879943 Expansible chamber motor with snap-acting valve |
| 06/1989 | |
| 06/28/1989 | EP0321573A1 Reciprocation switching structure for pumps |
| 12/1988 | |
| 12/01/1988 | WO1988009440A1 Reciprocation switching structure for pumps |
| 11/1988 | |
| 11/09/1988 | EP0289806A1 Fluid-operated miniature engine |
| 03/1987 | |
| 03/25/1987 | EP0215752A2 Piston pump, particularly for inflating tyres, mattresses, sports equipment and the like |
| 04/1986 | |
| 04/02/1986 | EP0176467A2 Fluid-driven reciprocating motor |
| 10/1985 | |
| 10/23/1985 | EP0158839A1 Fluid pump |
| 07/1985 | |
| 07/30/1985 | US4531896 Fluid pump |
| 04/1985 | |
| 04/30/1985 | US4513653 Automatic hydraulic reversing valve for a double-action working cylinder |
| 04/10/1985 | EP0136316A1 Vibrationless percussion tool |
| 03/1985 | |
| 03/26/1985 | US4506742 Vibrationless percussion tool |
| 08/1984 | |
| 08/16/1984 | WO1984003122A1 Vibrationless percussion tool |
| 11/1983 | |
| 11/23/1983 | EP0094862A1 Pneumatic driving device for a windscreen wiper and combined wiper-washer installation for headlights using such a device |
| 02/1983 | |
| 02/15/1983 | US4373425 Hydraulic engine |
| 12/1982 | |
| 12/21/1982 | US4364346 Exhaust timing control device for a two-cycle engine |
| 12/07/1982 | CA1136957A1 Hydraulic engine |
| 08/1982 | |
| 08/24/1982 | US4345926 Expansion engine |
| 05/1982 | |
| 05/18/1982 | US4329806 Fluid engine |
| 05/11/1982 | CA1123283A1 Reciprocating drive means |
| 12/1981 | |
| 12/08/1981 | US4304527 System for pumping an abrasive or corrosive fluid |
| 12/01/1981 | US4303002 Hand-operated pneumatic impact machine |
| 09/1981 | |
| 09/22/1981 | US4290489 Vibrationless pneumatic tools |
| 09/08/1981 | CA1108488A1 Fluid engine |
| 09/01/1981 | US4286929 Dual pressure gas motor, and method of operation |
| 08/1981 | |
| 08/18/1981 | US4284038 Reciprocating drive means |
| 04/1981 | |
| 04/22/1981 | EP0027182A2 Expansion engine |
| 02/1981 | |
| 02/25/1981 | EP0024158A1 A heat engine |
| 01/1981 | |
| 01/07/1981 | EP0022021A1 A hydraulic motor having a reciprocating piston |
| 06/1980 | |
| 06/17/1980 | US4207801 Hydraulic oscillatory devices |
| 04/1980 | |
| 04/16/1980 | EP0009919A1 Reciprocating drive means |
| 03/1980 | |
| 03/04/1980 | US4191093 Concrete strike-off vibrator |
| 10/1979 | |
| 10/16/1979 | CA1064339A1 Pneumatically operated oscillator |
| 10/02/1979 | US4169404 Fluid pressure actuator |
| 09/1979 | |
| 09/18/1979 | CA1062585A1 Hydraulic oscillatory devices |
| 07/1979 | |
| 07/24/1979 | US4161989 Reciprocating hydraulic motors |
| 02/1979 | |
| 02/27/1979 | US4141215 Windmill mechanism |
| 01/1979 | |
| 01/23/1979 | US4135479 Piston and cylinder for two-cycle engines |
| 09/1978 | |
| 09/05/1978 | US4111607 Linear hydraulic motor |
| 05/1978 | |
| 05/02/1978 | US4087206 Subsurface pumping unit incorporating heavy duty reversing valve and method of operating |
| 04/1978 | |
| 04/04/1978 | US4082032 Control of hydraulically powered equipment |
| 01/1978 | |
| 01/31/1978 | US4070949 Hydraulic striking apparatus |
| 01/31/1978 | US4070948 Pneumatic impact devices |
| 07/1977 | |
| 07/26/1977 | US4037520 Fluid motor apparatus |
| 07/12/1977 | US4034648 Reciprocating cylinder assembly for self-propelled sprinkler systems |
| 06/1977 | |
| 06/28/1977 | US4031812 Hydraulic vibrator for actuator drive |
| 06/14/1977 | US4028995 Hydraulic striking apparatus |
| 05/1977 | |
| 05/31/1977 | US4026193 Hydraulically driven hammer system |
| 05/03/1977 | US4020744 Control of hydraulically powered equipment |
| 03/1977 | |
| 03/29/1977 | US4014249 Pneumatically actuated sanding tool |
| 03/15/1977 | US4011795 Impact tool |
| 02/1977 | |
| 02/22/1977 | US4008984 Pump apparatus |
| 02/08/1977 | US4006665 Percussion tool |
| 01/1977 | |
| 01/11/1977 | US4002184 Water flow actuated air charging device |
| 11/1976 | |
| 11/16/1976 | US3991655 Hydroacoustic apparatus and valving mechanisms for use therein |
| 07/1976 | |
| 07/20/1976 | US3969987 Hydroacoustic apparatus and valving mechanisms for use therein |
| 07/20/1976 | US3969984 Hydroacoustic apparatus and valving mechanisms for use therein |
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