| Patents for F04B 31 - Free-piston pumps specially adapted for elastic fluids; Systems incorporating such pumps (182) | |
|---|---|
| 05/1999 | |
| 05/19/1999 | CN2319605Y Self-lubricating automotive inflating pump |
| 04/1999 | |
| 04/21/1999 | CN2315329Y Mini full automatic inflator |
| 04/14/1999 | CN2314126Y Electric air pump |
| 04/07/1999 | CN2313072Y 电动打气筒 Electric pump |
| 03/1999 | |
| 03/31/1999 | CN2312344Y Electric or fuel driven machine for concentration and pumping |
| 03/17/1999 | CN2310872Y Motor-driven inflating machine |
| 03/03/1999 | CN2309439Y Two-way high-pressure pump |
| 02/1999 | |
| 02/03/1999 | CN2306326Y Reciprocating hand pump |
| 01/1999 | |
| 01/06/1999 | CN1204009A Gas cylinder |
| 10/1998 | |
| 10/21/1998 | CN2295060Y Hand-driven suction pump |
| 09/1998 | |
| 09/15/1998 | US5807083 High pressure gas compressor |
| 09/09/1998 | CN1192506A Free piston vuillermier machine |
| 06/1998 | |
| 06/30/1998 | US5771693 Gas compressor |
| 05/1998 | |
| 05/13/1998 | CN1181463A Hydraulic power vacuum water pump |
| 07/1997 | |
| 07/23/1997 | EP0767865A4 Free piston end position limiter |
| 06/1997 | |
| 06/11/1997 | EP0560956B1 Oscillating piston motor and installation with an oscillating piston motor |
| 06/04/1997 | EP0381709B1 Compact fluid operated apparatus and method |
| 05/1997 | |
| 05/28/1997 | EP0693160B1 Method and apparatus for measuring piston position in a free piston compressor |
| 04/1997 | |
| 04/16/1997 | EP0767865A1 Free piston end position limiter |
| 09/1996 | |
| 09/24/1996 | US5558730 Vehicle wheel including self-inflating tire pump |
| 07/1996 | |
| 07/23/1996 | US5537820 Free piston end position limiter |
| 07/03/1996 | CN1032227C Valve assemble, for use in conbination with straght-cylinder, gas-compression chamber, and in combination there with |
| 03/1996 | |
| 03/05/1996 | US5496153 Method and apparatus for measuring piston position in a free piston compressor |
| 01/1996 | |
| 01/24/1996 | EP0693160A1 Method and apparatus for measuring piston position in a free piston compressor |
| 01/04/1996 | WO1996000342A1 Free piston end position limiter |
| 12/1995 | |
| 12/06/1995 | CN2214543Y Free piston circulating pump with energy recovery |
| 10/1995 | |
| 10/11/1995 | CN1030005C 气体压缩机 Gas compressor |
| 07/1995 | |
| 07/12/1995 | CN1105103A 气体压缩机 Gas compressor |
| 04/1995 | |
| 04/12/1995 | EP0647291A1 A gas compressor |
| 01/1995 | |
| 01/24/1995 | US5383334 Compressor integral with stirling engine |
| 11/1994 | |
| 11/30/1994 | CN1095795A 液体重力真空系统 Liquid gravity vacuum system |
| 10/1994 | |
| 10/13/1994 | WO1994023204A1 Method and apparatus for measuring piston position in a free piston compressor |
| 08/1994 | |
| 08/30/1994 | US5342176 Method and apparatus for measuring piston position in a free piston compressor |
| 03/1994 | |
| 03/30/1994 | CN2160024Y Floating bottom pump |
| 03/17/1994 | WO1993024754A3 A gas compressor |
| 03/02/1994 | CN2157996Y Suction pump capable of simultaneously water uptaking, discharging and dust absoring |
| 01/1994 | |
| 01/04/1994 | US5275542 Free piston-type compressor |
| 12/1993 | |
| 12/23/1993 | DE4320529A1 Compressor working with Stirling engine - has bellows controlled pressure chambers connected by inlet and outlet valves |
| 12/09/1993 | WO1993024754A2 A gas compressor |
| 12/09/1993 | CA2136716A1 A gas compressor |
| 09/1993 | |
| 09/22/1993 | EP0560956A1 Oscillating piston motor and installation with an oscillating piston motor. |
| 08/1993 | |
| 08/24/1993 | US5238372 Cooled spool piston compressor |
| 04/1993 | |
| 04/15/1993 | WO1993007360A1 Oscillating piston motor and installation with an oscillating piston motor |
| 12/1992 | |
| 12/13/1992 | CA2044632A1 Free piston compressor |
| 10/1992 | |
| 10/21/1992 | EP0509660A1 Free piston-type compressor |
| 09/1992 | |
| 09/09/1992 | CN1064342A 气体压缩机 Gas compressor |
| 09/09/1992 | CN1064341A Valve assemble, for use in conbination with straght-cylinder, gas-compression chamber, and in combination there with |
| 04/1992 | |
| 04/14/1992 | CA1298737C Pressure actuated movable head for a resonant reciprocating compressor balance chamber |
| 02/1992 | |
| 02/18/1992 | US5088284 Compressor integral with Stirling engine |
| 08/1991 | |
| 08/14/1991 | DE4102710A1 Illumination device for optical appts. - produces light beam with rectangular cross=section, using patterned disc to break up incident beam AB DE4102507A The illumination device is for an optical appts. The device produces a beam of rectangular cross-section and has a spherical auxiliary mirror (1). There is a first collector disc (3), a refracting disc (4) and a second collecting disc (5). The refracting disc (4) is transparent to the visible spectrum and has a flat surface on the light incident side (8). The light exit side (7) is formed with several flat surfaces (7a,7b,7c) of rectangular shape. The surfaces (7a) are parallel to the surface (8) whilst all the other surfaces are inclined to the surface (7a) at the same angle. The refractory disc (4) is so positioned that its light incident surface (8) is at right angles to the optical axis (9) of the light source (L). USE - Illumination of optical appts. AN 91246752 TI Solenoid-driven pump - has piston-mounted permanent magnets beyond which ends of stator core on rim of coil do not protrude in axial direction |
| 05/1991 | |
| 05/22/1991 | EP0428212A1 Motor-compressor unit |
| 05/15/1991 | EP0378656A4 Pressure actuated movable head for a resonant reciprocating compressor balance chamber |
| 03/1991 | |
| 03/20/1991 | CN2073488U 压缩机 Compressor |
| 07/1990 | |
| 07/25/1990 | EP0378656A1 Pressure actuated movable head for a resonant reciprocating compressor balance chamber |
| 05/1990 | |
| 05/15/1990 | US4924758 Compact fluid operated apparatus and method |
| 02/1990 | |
| 02/22/1990 | WO1990001613A1 Compact fluid operated apparatus and method |
| 12/1989 | |
| 12/28/1989 | WO1989012749A1 Pressure actuated movable head for a resonant reciprocating compressor balance chamber |
| 10/1989 | |
| 10/18/1989 | CN2046156U Human bady gravitational sprinkler |
| 06/1989 | |
| 06/06/1989 | US4836757 Pressure actuated movable head for a resonant reciprocating compressor balance chamber |
| 01/1989 | |
| 01/24/1989 | US4799421 Hydrodynamic spiral-grooved journal bearing for electromagnetically rotated and reciprocated compressor piston |
| 08/1988 | |
| 08/02/1988 | US4761118 Positive displacement hydraulic-drive reciprocating compressor |
| 05/1987 | |
| 05/27/1987 | EP0223288A1 Arrangement comprising a hydrodynamically journalled reciprocable and rotatable piston |
| 01/1987 | |
| 01/24/1987 | CN85101680A 空气压缩机 Air compressor |
| 01/17/1987 | CN85101669A 空气压缩机 Air compressor |
| 09/1986 | |
| 09/23/1986 | US4613285 Piston stroke control device for free piston type oscillating compressors |
| 09/03/1986 | EP0193498A2 Positive displacement hydraulic-drive reciprocating compressor |
| 09/03/1986 | CN86100929A Positive displacement hydraulic-drive reciprocating compressor |
| 11/1985 | |
| 11/21/1985 | EP0161429A1 Piston stroke control device for free piston type oscillating compressors |
| 05/1984 | |
| 05/22/1984 | US4449894 Centrifugal-reciprocating compressor |
| 03/1984 | |
| 03/06/1984 | US4435133 Free piston engine pump with energy rate smoothing |
| 02/1984 | |
| 02/29/1984 | EP0101565A1 Thermocompressor with pressure actuated heating chamber bypass |
| 11/1983 | |
| 11/01/1983 | US4412552 Method of controlling inlet valves of compression reactor and device for effecting same |
| 08/1983 | |
| 08/24/1983 | EP0086725A1 Hydraulic-pressure generator |
| 12/1981 | |
| 12/29/1981 | US4307997 Free piston inertia compressor |
| 11/1981 | |
| 11/12/1981 | WO1981003130A1 Method and device for controlling inlet valves of a compressiontype chemical reactor |
| 09/1981 | |
| 09/29/1981 | CA1109732A1 Free piston engine pump with energy rate smoothing |
| 08/1981 | |
| 08/06/1981 | WO1981002183A1 Slant axis rotary piston mechanism |
| 08/05/1981 | EP0033026A2 Slant axis rotary piston machine |
| 07/1980 | |
| 07/15/1980 | US4212597 Pneumatic installations |
| 06/1980 | |
| 06/03/1980 | US4205638 Fluid power supply system |
| 03/1979 | |
| 03/06/1979 | US4142485 Method and device for ensuring the safety in a free piston machine |
| 10/1976 | |
| 10/19/1976 | US3986796 Direct action compressor fitted with a one-piece piston |
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