| Patents for F02B 53 - Internal-combustion aspects of rotary-piston or oscillating-piston engines (4,415) |
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| 07/10/1990 | WO1990007632A1 Power conversion machine with pistons rotating in pairs relative to each other in a spherical housing |
| 07/10/1990 | US4940400 Lubrication system for a rotary-piston internal combustion engine |
| 07/04/1990 | EP0376642A1 Rotary engine |
| 06/28/1990 | DE3843053A1 Internal combustion engine |
| 06/24/1990 | CA2006457A1 Rotary engine |
| 06/21/1990 | DE3841937A1 Rotary engine |
| 06/19/1990 | US4934325 Rotary internal combustion engine |
| 06/12/1990 | US4932850 Rotary drive having inner and outer interengaging rotors |
| 06/12/1990 | US4932214 Processing system for liquid hydrogen |
| 06/07/1990 | DE3912216A1 Two=stroke IC rotary engine - incorporates crankshaft and rotating engine assembly |
| 05/23/1990 | DE4002506A1 Sliding vane IC engine - has heat exchanger and condenser to utilise heat in exhaust gases |
| 05/23/1990 | DE3725388A1 Turboengine |
| 05/22/1990 | US4926816 Rotary piston engine |
| 05/17/1990 | DE3922574C1 Toroidal piston IC engine - incorporates separate chamber for preparation of fuel-air mixture |
| 05/02/1990 | CN1041813A Multifunctional semi-rotor internal combustion engine |
| 05/02/1990 | CN1041812A Internal combustion engine with cavity rotary piston and making use of multiple kinds of fuel |
| 04/10/1990 | US4915071 Orbit internal combustion engine |
| 04/10/1990 | CA1267608A1 Rotary engine |
| 04/03/1990 | US4912924 Rotary internal combustion engine and power plant |
| 03/27/1990 | US4911623 Method and apparatus for lubricating a rotary engine |
| 03/27/1990 | US4911122 Tuned intake air inlet for a rotary engine |
| 03/21/1990 | CN1040655A Engine with internal and external rotors revolving concentrically in same direction |
| 03/20/1990 | US4909208 Rotary internal combustion motor |
| 03/08/1990 | WO1990002259A1 Rotary piston engine |
| 03/07/1990 | CN1040249A Ic engine capable of utilizing energy twice |
| 02/20/1990 | US4901694 Rotary engine |
| 02/08/1990 | DE3824539A1 Engine, especially internal combustion engine |
| 02/01/1990 | DE3825372A1 Rotary engine |
| 02/01/1990 | DE3825365A1 Rotary engine |
| 02/01/1990 | DE3825354A1 Rotary engine |
| 01/23/1990 | US4895117 Internal combustion engine |
| 01/16/1990 | US4893996 Interengaging rotor device with lubrication means |
| 01/10/1990 | CN2050881U Rotating board engine |
| 01/03/1990 | CN1006319B Rotary piston engine with ring cylinder |
| 01/02/1990 | US4890591 Rotary internal combustion engine and method of starting the engine |
| 12/26/1989 | US4889091 Rotary valve for natural gas rotary engine |
| 12/20/1989 | CN1006170B Pendulum type piston ic engine without connecting rod |
| 12/20/1989 | CN1006166B Double-eccentric center internal axle revolving piston machinery |
| 12/13/1989 | EP0345745A2 Rotary piston engine |
| 12/13/1989 | EP0333883A4 Internal-combustion rotary-piston engine. |
| 12/13/1989 | CN1037947A Piston internal combustion engine |
| 12/05/1989 | US4884537 Rotary internal combustion engine |
| 12/05/1989 | US4884532 Swinging-piston internal-combustion engine |
| 11/01/1989 | CN1036815A Automatical temperature-retaining hot-surface igniter and method |
| 10/31/1989 | US4876988 Engine concurrently utilizes both high hydrogen content fuels such as methanol, ethanol, liquid gas and high carbon fuels such as diesel fuel |
| 10/26/1989 | DE3811532A1 Rotary engine for drive and compressor |
| 10/19/1989 | WO1989009874A1 Compound rotary internal combustion engine |
| 10/19/1989 | WO1989009871A1 Two-stroke rotating piston internal combustion engine |
| 10/12/1989 | DE3918566A1 Tangential rotary piston system |
| 10/12/1989 | DE3810708A1 Spring-cell turbine motor |
| 10/11/1989 | EP0336617A2 Rotating cylinder block piston-cylinder engine |
| 10/03/1989 | US4870869 Rotor composite engine |
| 09/27/1989 | EP0333883A1 Internal-combustion rotary-piston engine |
| 09/26/1989 | CA1261762A1 Rotary fluid-handling mechanism |
| 09/26/1989 | CA1260402A1 Rotary engine |
| 09/21/1989 | DE3808342A1 Two-stroke internal combustion engine with self-ignition and secondary expansion |
| 09/19/1989 | US4867107 Rotary vee engine |
| 09/06/1989 | CN1035344A Wave ring-type rotary piston engine |
| 08/09/1989 | EP0327352A2 Rotary vee engine |
| 08/08/1989 | US4854279 Three chamber continuous combustion engine |
| 07/18/1989 | US4848296 Rotary internal combustion engine |
| 07/18/1989 | US4848295 Axial flow rotary engine |
| 07/05/1989 | CN1033674A Rotary internal combustion engine |
| 07/04/1989 | US4843821 Multicylinder compound engine |
| 06/20/1989 | US4840550 Internal axis rotary piston engine with protrusions having two sealing corners |
| 06/07/1989 | EP0318904A2 System for preparing liquid hydrogen |
| 06/06/1989 | US4836149 Rotating cylinder block piston-cylinder engine |
| 05/16/1989 | US4830591 Lubrication system for a rotary-piston internal combustion engine |
| 05/03/1989 | CN1032693A Blade-wheel type rotating piston engine |
| 05/02/1989 | US4825827 Shaft power generator |
| 04/27/1989 | DE3734135A1 Rotary piston with output device for planetary rotation engines |
| 04/25/1989 | US4823743 Oscillating vane machine |
| 04/20/1989 | DE3826533A1 Rotary internal combustion engine |
| 04/20/1989 | DE3733830A1 Impulse combustion turbine engine |
| 04/18/1989 | US4822260 Device for controlling fluid supply to a rotary piston machine |
| 04/18/1989 | US4822253 Machine installation for a heat pumping plant |
| 04/11/1989 | US4819594 Reversible rotary internal combustion engine |
| 04/04/1989 | US4817567 Rotary piston engine |
| 03/28/1989 | US4815432 Variable cavity fluid power device |
| 03/23/1989 | WO1989002517A1 Internal-combustion rotary-piston engine |
| 03/22/1989 | EP0307417A1 Rotating piston machine. |
| 03/21/1989 | US4813388 Rotary engine |
| 01/24/1989 | US4799868 Compressor/pump |
| 01/19/1989 | DE3721860A1 Rotary piston machine |
| 01/11/1989 | CN1030278A Double oscillating piston engine |
| 01/04/1989 | EP0187839B1 Rotary positive displacement machine |
| 01/03/1989 | CA1248029A1 Rotary internal combustion engine |
| 01/03/1989 | CA1248028A1 Reciprocating rotary piston thermal engine with a spherical chamber |
| 12/29/1988 | WO1988010357A1 Circular wing fitted with piston- and mass-type propulsion units |
| 12/15/1988 | DE3718310A1 Rotary multiple-piston flywheel engine |
| 12/14/1988 | CN88102501A E-shaped rotary polygonal piston engine |
| 12/14/1988 | CN87103715A 转子发动机 Rotary engine |
| 12/06/1988 | US4788952 Rotary piston internal combustion engine |
| 11/30/1988 | EP0292933A2 Lubrication system for the excentric bearing of a rotary-piston internal combustion engine |
| 11/22/1988 | EP0190135A4 Rotary apparatus. |
| 11/17/1988 | WO1988008921A1 Piston internal combustion engine |
| 11/16/1988 | CN87103795A By-pass compression rotating piston engine |
| 11/08/1988 | US4782656 Rotary valve assembly for engine |
| 11/03/1988 | DE3712849A1 Rotary engine |
| 10/13/1988 | DE3710611A1 Rotary piston-type internal combustion engine of trochoidal design |