| Patents for F01B 7 - Machines or engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders (730) |
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| 09/25/2003 | WO2003078810A1 Engine with power generating capability |
| 09/25/2003 | WO2003078809A2 Internal combustion engine |
| 09/04/2003 | DE20206361U1 Implosion steam engine with double-action piston has spray device at each end of cylinder |
| 06/03/2003 | US6573330 Process for preparing water-absorbent resin |
| 05/02/2003 | EP1306539A2 Two cycle hot gas engine |
| 05/01/2003 | US20030079715 Integral air compressor for boost air in barrel engine |
| 04/24/2003 | US20030074882 Two-cycle hot-gas engine |
| 04/17/2003 | WO2003031784A1 Integral air compressor for boost air in barrel engine |
| 03/19/2003 | EP0807646B1 Water-absorbent resin and process for its preparation |
| 02/27/2003 | WO2003016701A1 Combined piston engine |
| 01/02/2003 | EP1268978A1 Piston motion modifiable internal combustion engine |
| 11/26/2002 | US6484682 Rocker arm assembly |
| 10/02/2002 | DE10116077A1 Two-stroke opposed piston engine has pistons coupled via diverting mechanism |
| 07/17/2002 | CN1087808C Air cooled power machine |
| 07/03/2002 | EP1218626A1 Double explosion piston lcv r1 |
| 06/20/2002 | DE10016707C2 Heißgasmotor mit einem Arbeitskolben, der sich innerhalb eines Verdränger-Freikolbens bewegt Stirling engine with a piston that moves within a displacer piston-free |
| 05/29/2002 | EP0910729B1 Power machine lubrication |
| 04/11/2002 | US20020040639 Analytical database system that models data to speed up and simplify data analysis |
| 04/03/2002 | CN1082139C Dual piston IC engine |
| 03/06/2002 | EP0910726B1 Air cooled power machine |
| 02/14/2002 | US20020017253 Rocker arm assembly |
| 11/20/2001 | US6318309 Opposed piston engine with reserve power capacity |
| 11/13/2001 | US6314862 Combination cylinder and pistons |
| 10/18/2001 | WO2001077494A1 Piston motion modifiable internal combustion engine |
| 10/18/2001 | DE10016707A1 Hot-gas engine for machine, vehicle or generator; has outer piston forming cylinder of inner piston, where stroke area of inner piston is arranged centrally with respect to stroke area of outer piston |
| 09/27/2001 | WO2001071159A1 Engine, especially internal combustion engine |
| 08/28/2001 | US6279550 Internal combustion engine |
| 08/28/2001 | US6279520 Adiabatic, two-stroke cycle engine having novel scavenge compressor arrangement |
| 06/26/2001 | US6250263 Dual piston cylinder configuration for internal combustion engine |
| 04/05/2001 | WO2001023723A1 Double explosion piston lcv r1 |
| 02/22/2001 | WO2001012970A1 Hot-gas engine with pistons that work inside one another |
| 02/20/2001 | CA2058659C Cyclic hydraulic actuator |
| 11/02/2000 | WO2000065208A1 Dual piston cylinder configuration for internal combustion engine |
| 08/24/2000 | DE19938023C2 Heißgasmotor mit einem Arbeitskolben, der sich innerhalb eines Verdrängerkolbens bewegt Stirling engine with a piston that moves within a displacer |
| 07/18/2000 | US6089195 Adiabatic, two-stroke cycle engine having novel combustion chamber |
| 07/04/2000 | US6082313 Power machine lubrication |
| 06/29/2000 | DE19857734A1 Opposed piston engine has Hall sensor arrangement for changing induction valve between two, four stroke modes, holding magnet controlling valve during compression, control electronics |
| 04/27/2000 | DE19938023A1 Stirling motor has working piston moving in displacement piston inside outer rigid displacement cylinder, and short-term heat store to utilize residual heat |
| 01/11/2000 | US6012280 Reciprocating engine |
| 11/16/1999 | US5983636 Power converter according to the principle of the hot-air engine |
| 09/09/1999 | DE19813398C1 Compression ratio and timing setting device for i.c engine e.g. 2-stroke engine |
| 08/04/1999 | CN1225149A Air cooled power machine |
| 08/03/1999 | CA2115573C Internal combustion engine having opposed pistons |
| 06/23/1999 | CN1043805C Sleeve piston pump |
| 05/25/1999 | CA2122424C Four-stroke internal combustion engine |
| 04/28/1999 | EP0910729A1 Power machine lubrication |
| 04/28/1999 | EP0910726A1 Air cooled power machine |
| 04/27/1999 | CA2074754C Power transmission mechanism |
| 02/23/1999 | US5873339 Bidirectionally reciprocating piston engine |
| 02/17/1999 | CN2307910Y Double-piston pneumatic actuating mechanism |
| 01/20/1999 | EP0892162A2 Dual compression and dual expansion internal combustion engine |
| 11/03/1998 | US5829339 Crimped sealed adapter bushing assembly for a double diaphragm spring brake actuator |
| 10/13/1998 | US5819635 Hydraulic-pneumatic motor |
| 10/13/1998 | US5819533 Hydraulic-pneumatic motor |
| 09/22/1998 | US5809864 Opposed piston engines |
| 09/16/1998 | EP0843776A4 Brake actuator with centering dome in service chamber |
| 09/01/1998 | US5799629 Adiabatic, two-stroke cycle engine having external piston rod alignment |
| 08/06/1998 | WO1998034012A1 Internal combustion engine |
| 07/28/1998 | US5785506 Liquid feeding pump |
| 07/14/1998 | US5778760 End cap for intermediate use in cylinder assembly and method |
| 06/18/1998 | WO1998026166A1 An internal combustion engine |
| 05/28/1998 | WO1998022730A1 Rotary to reciprocating motion conversion linkage |
| 05/27/1998 | EP0843776A1 Brake actuator with centering dome in service chamber |
| 03/11/1998 | CN1175962A Process for preparing water-absorbent resin |
| 02/11/1998 | EP0680546B1 Internal combustion rotary piston engine |
| 02/03/1998 | US5713314 Dual piston internal combustion engine |
| 01/29/1998 | WO1998003774A1 Reversible machine |
| 01/22/1998 | WO1998002653A1 Improved internal combustion engine and working cycle |
| 01/22/1998 | WO1998002647A1 Power machine lubrication |
| 01/22/1998 | WO1998002639A1 Air cooled power machine |
| 01/22/1998 | CA2260141A1 Air cooled power machine |
| 12/23/1997 | US5699715 Piston for a reciprocating piston machine |
| 12/03/1997 | EP0810356A1 Reciprocating engine |
| 11/26/1997 | EP0787252A4 A dual piston internal combustion engine |
| 11/19/1997 | EP0807646A1 Process for preparing water-absorbent resin |
| 10/23/1997 | WO1997039233A1 An internal combustion engine |
| 10/07/1997 | US5673665 Engine with rack gear-type piston rod |
| 09/24/1997 | CN1160435A Dual Piston IC engine |
| 09/10/1997 | EP0793766A1 Construction of a 3-chamber-cylinder with enlarged piston area and with two forward motion chambers and one reverse motion chamber or inverse |
| 08/28/1997 | DE19607063A1 Internal combustion engine with alternating compression ratios |
| 08/28/1997 | DE19607054A1 Internal combustion engine with two pistons in one cylinder |
| 08/27/1997 | EP0680551B1 Method of operating an internal combustion engine |
| 08/21/1997 | WO1997030270A1 Hydraulic engine |
| 08/14/1997 | DE19605166A1 Multi-fuel internal combustion engine |
| 08/06/1997 | EP0787252A1 A dual piston internal combustion engine |
| 06/05/1997 | WO1997019968A1 Process for preparing water-absorbent resin |
| 04/23/1997 | EP0746679A4 Dwelling scotch yoke engine |
| 03/06/1997 | DE19533520A1 Passenger vehicle internal combustion engine with oppositely acting pistons |
| 03/05/1997 | EP0704027B1 Twin piston power cylinder |
| 02/20/1997 | WO1997006349A1 Brake actuator with centering dome in service chamber |
| 02/20/1997 | CA2228508A1 Brake actuator with centering dome in service chamber |
| 01/29/1997 | EP0756067A2 Dual compression and dual expansion internal combustion engine |
| 12/31/1996 | US5588348 Brake actuator with centering dome in service chamber |
| 12/19/1996 | DE19521378A1 Two=stroke diesel boxer engine with reduced performance loss |
| 12/18/1996 | CN1033600C Reciprocatory machines |
| 12/11/1996 | EP0746679A1 Dwelling scotch yoke engine |
| 12/04/1996 | EP0745754A1 Engine with a 3 chamber cylinder |
| 11/07/1996 | WO1996035042A1 Construction of a 3-chamber-cylinder with enlarged piston area and with two forward motion chambers and one reverse motion chamber or inverse |
| 11/06/1996 | EP0741232A1 3 chamber cylinder |
| 09/18/1996 | EP0607154B1 Energy converter on the hot-air engine principle |