| Patents for F01L 23 - Valves controlled by impact of piston, e.g. in free-piston machines (250) |
|---|
| 10/06/1993 | CN1077009A Air valve actuator for reciprocable machine |
| 09/14/1993 | US5243897 Magnetically actuated fluid motor |
| 08/31/1993 | US5240390 Air valve actuator for reciprocable machine |
| 08/04/1993 | EP0321573B1 Reciprocation switching structure for pumps |
| 06/23/1993 | EP0547152A1 Heat pump system |
| 02/24/1993 | EP0528718A1 Reciprocating hydraulic motor |
| 10/21/1992 | EP0509616A2 Switching device for reciprocating pumps |
| 10/14/1992 | EP0508555A2 Switching device for reciprocating pumps |
| 09/29/1992 | US5150643 Reciprocating actuator |
| 08/11/1992 | US5137436 Device for the generation of auxiliary pressure |
| 07/14/1992 | US5129414 Expansible chamber device having variably restrained valve systems |
| 07/14/1992 | US5129236 Heat pump system |
| 06/17/1992 | DE4039439A1 Twin chamber hydraulic or pneumatic motor - makes use of permanent magnet to stabilise the valves |
| 06/10/1992 | EP0489005A1 Multicylinder self-starting uniflow engine |
| 06/09/1992 | US5120202 Switching device for reciprocating pumps |
| 05/12/1992 | US5111843 Expansible chamber device having variably restrained valve systems |
| 03/19/1992 | WO1992004584A1 Heat pump system |
| 03/19/1992 | CA2090467A1 Heat pump system |
| 01/28/1992 | US5083906 Fluid pump |
| 01/21/1992 | US5081840 Spool valve and piston power plant |
| 10/23/1991 | EP0489005A4 Multicylinder self-starting uniflow engine. |
| 10/09/1991 | EP0450257A1 Hydraulic machine capable of releasing the pressure of one liquid and simultaneously pumping another liquid |
| 07/16/1991 | US5031402 Pneumatic pump actuator for oil wells |
| 05/22/1991 | EP0428406A1 Reciprocating actuator |
| 05/16/1991 | WO1991006761A1 Piston pump |
| 04/16/1991 | US5007812 Hydraulic pump with pulsating high and low pressure outputs |
| 03/26/1991 | US5002469 Switching device for reciprocating pumps |
| 03/26/1991 | US5002468 Switching device for reciprocating pumps |
| 02/27/1991 | EP0414268A1 Compressed air motor with automatic control, in particular for paint spayers, grase guns or the like |
| 01/01/1991 | US4981068 Expansible chamber device having variably restrained valve systems |
| 09/12/1990 | EP0281794B1 Liquid piston pump driven by a compressed-air piston engine |
| 08/14/1990 | US4947731 Multicyclinder self-starting uniflow engine |
| 07/12/1990 | WO1990007630A1 Multicylinder self-starting uniflow engine |
| 07/03/1990 | US4938117 Multicylinder self-starting uniflow engine |
| 02/13/1990 | US4899638 Automatically-reversing piston-and-cylinder unit |
| 01/23/1990 | US4895497 Double acting pneumatic driven pump with regulating valve |
| 01/17/1990 | CN1006492B Fluid pressure intensifier |
| 01/11/1990 | WO1990000221A1 Automatically-reversing piston-and-cylinder unit |
| 12/12/1989 | US4885978 Fluid-operated miniature engine |
| 10/03/1989 | US4870890 Automatic reversing valve |
| 07/05/1989 | EP0323216A2 Reciprocating device and switching mechanism therefor |
| 06/28/1989 | EP0321573A1 Reciprocation switching structure for pumps |
| 05/16/1989 | US4830583 Fluid motor-pumping apparatus and system |
| 05/09/1989 | US4827831 Reciprocating device and switching mechanism therefor |
| 04/20/1989 | DE3733596A1 Reciprocating forcing pump |
| 02/09/1989 | WO1989001087A1 Actuating device for a flap-valve distributor for a driving or receiving volumetric engine |
| 12/20/1988 | US4792291 Viscous damped valve for hydraulic pump |
| 12/01/1988 | WO1988009440A1 Reciprocation switching structure for pumps |
| 11/22/1988 | US4785713 Driving device, in particular for a proportioning pump of the piston-flowmeter type |
| 11/09/1988 | EP0289806A1 Fluid-operated miniature engine |
| 10/25/1988 | US4780064 Pump assembly and its method of operation |
| 09/14/1988 | EP0281794A1 Liquid piston pump driven by a compressed-air piston engine |
| 08/30/1988 | US4767282 Fluid pressure booster |
| 08/30/1988 | US4766802 Small-sized engine operated by fluid |
| 06/07/1988 | CA1237702A1 Valve mechanism for operating a piston within a cylinder |
| 03/29/1988 | US4733599 Apparatus for controlling the flow of a pressure fluid in a motor |
| 03/29/1988 | CA1234509A1 Fluid pressure operated piston engine assembly |
| 12/15/1987 | US4712374 Hydraulic pump jack |
| 11/10/1987 | US4705458 Fluid operated pump |
| 10/07/1987 | EP0239684A1 Small-sized engine operated by fluid |
| 09/02/1987 | EP0234798A2 Pump |
| 08/26/1987 | CN87100647A Pump assembly and its method of operation |
| 08/04/1987 | US4684332 Ratio pump and method |
| 08/04/1987 | CA1224970A1 Air-operated diaphragm pump and a valve arrangement therefor |
| 07/28/1987 | US4682937 Double-acting diaphragm pump and reversing mechanism therefor |
| 06/30/1987 | US4676139 Valve mechanism for operating a piston within a cylinder |
| 06/23/1987 | US4674958 Fluid pressure booster |
| 05/27/1987 | EP0223568A2 Ratio pump |
| 05/20/1987 | EP0222007A1 Fluid pressure intensifier |
| 04/08/1987 | EP0217699A1 Motor device of the piston liquid meter type, especially for a dosing pump |
| 03/18/1987 | CN86105995A Driving device of metering pump specially for piston flowmeter |
| 02/11/1987 | CN86104193A Fluid pressure intensifier |
| 01/06/1987 | US4634350 Double acting diaphragm pump and reversing mechanism therefor |
| 12/09/1986 | US4627794 Fluid pressure intensifier |
| 12/04/1986 | WO1986007118A1 Fluid pressure intensifier |
| 07/22/1986 | CA1208074A1 Fluid-operated reciprocating pump |
| 05/07/1986 | EP0180170A2 Fluid pressure operated piston engine assembly |
| 05/06/1986 | US4586426 Multi-cylinder piston engine and method of operation thereof |
| 02/26/1986 | EP0172780A2 Fluid operated pump |
| 11/26/1985 | US4555222 Air-operated diaphragm pump and a valve arrangement therefor |
| 11/05/1985 | US4550642 Fluid pressure operated piston engine assembly |
| 11/05/1985 | US4550624 Reversing mechanism module for a double acting reciprocating pump and method for repairing the pump |
| 07/10/1985 | EP0147889A1 Air operated diaphragm pump and a valve arrangement therefore |
| 06/18/1985 | US4523895 Fluid intensifier |
| 06/06/1985 | WO1985002444A1 Pneumatic rotor for paint spraying apparatus, grease pumps and the like |
| 06/05/1985 | EP0143428A2 Air motor for paint spraying devices, lubricant pumps and the like |
| 04/16/1985 | CA1185481A1 Self contained pump and reversing mechanism therefor |
| 01/02/1985 | EP0129600A1 A fluid intensifier |
| 11/06/1984 | US4480969 Fluid operated double acting diaphragm pump housing and method |
| 10/23/1984 | US4478560 Fluid-operated reciprocating pump |
| 07/05/1984 | WO1984002557A1 A fluid intensifier |
| 04/04/1984 | EP0104847A1 A fluid-operated pump |
| 04/03/1984 | CA1164769A1 Hydraulic cylinder and piston with automatic reciprocation valve |
| 03/13/1984 | US4436493 Self contained pump and reversing mechanism therefor |
| 03/07/1984 | EP0102311A2 Fluid motor |
| 12/21/1983 | EP0029826B1 Pneumatic engine with piston slide |
| 11/23/1983 | EP0094862A1 Pneumatic driving device for a windscreen wiper and combined wiper-washer installation for headlights using such a device |
| 10/25/1983 | CA1155711A1 Reciprocating pump and reversing mechanism therefor |
| 05/17/1983 | US4383475 Hydraulic cylinder and piston with automatic reciprocation valve |
| 04/12/1983 | US4379680 Ambient air timing device |