| Patents for F01B 9 - Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to groups (2,571) |
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| 06/30/1981 | CA1103960A1 Variable throw eccentric |
| 06/23/1981 | US4274367 Reciprocating piston beam engine |
| 06/23/1981 | US4274329 Rotary actuator apparatus |
| 06/02/1981 | US4270495 Variable displacement piston engine |
| 06/02/1981 | US4270395 Motion translating mechanism |
| 06/02/1981 | US4270352 Cycle-controlled sliding-valve in a heating-chamber combustion engine |
| 05/26/1981 | US4270054 Power plant |
| 05/26/1981 | CA1101693A1 Crank-type transmission arrangements |
| 05/19/1981 | US4267765 Reciprocating engine with improved feed and exhaust valve means |
| 04/08/1981 | EP0026633A1 Opposed piston machinery |
| 03/25/1981 | EP0025503A1 Reciprocating piston engine |
| 03/18/1981 | EP0025071A1 Reciprocating-piston engine |
| 02/10/1981 | US4249454 Fluid pressure driven reciprocating engine |
| 02/10/1981 | US4249424 Variable throw eccentric |
| 12/30/1980 | US4241640 Reciprocating engine with improved main bearing |
| 12/09/1980 | US4237741 Mechanical transmission arrangement |
| 12/02/1980 | US4236416 Power transmission |
| 11/26/1980 | EP0019557A1 Internal combustion engine with swash plate, without crankshaft-connecting rod |
| 11/04/1980 | CA1088868A1 Free piston engine with opposed cylinders |
| 08/20/1980 | EP0014551A1 Opposed piston internal-combustion engine with special scavenging means |
| 08/07/1980 | WO1980001588A1 Opposed piston internal combustion engine with special scavenging means |
| 07/29/1980 | CA1082603A1 Reciprocating rotary engine |
| 07/22/1980 | US4213427 Rotary engine |
| 07/22/1980 | US4213377 Reciprocating engine with improved power output means |
| 07/08/1980 | US4211190 Groove guided piston linkage for an internal combustion engine |
| 07/01/1980 | CA1080628A1 Internal-combustion engine |
| 06/17/1980 | US4207774 Drive mechanism for piston engines |
| 04/29/1980 | CA1076487A1 Variable displacement reciprocating piston machine |
| 03/25/1980 | US4194404 Crank assembly for reciprocating piston machines |
| 03/11/1980 | US4192261 Multi-cylinder reciprocating piston internal combustion engine |
| 03/04/1980 | US4191019 Double-acting hot gas engine assemblage |
| 01/29/1980 | US4185508 Motion change transmission |
| 01/22/1980 | US4184463 Internal-combustion engine |
| 12/18/1979 | US4178885 Rotary piston/cylinder engines |
| 12/11/1979 | US4177771 Rotary engines with free reciprocating-rotating pistons and jet thrust drive |
| 11/06/1979 | US4173151 Motion translating mechanism |
| 05/29/1979 | US4156410 Internal combustion reciprocating engine |
| 05/08/1979 | US4152955 Engine compound crankshaft |
| 03/20/1979 | US4144851 Variable compression ratio engine |
| 02/13/1979 | US4138972 Fuel injection means for internal combustion engines |
| 02/13/1979 | US4138930 Piston and cylinder machines |
| 01/02/1979 | US4132118 Piston power generating and working machine |
| 01/02/1979 | US4132078 Piston machine |
| 09/12/1978 | US4112826 Variable displacement reciprocating piston machine |
| 09/05/1978 | CA1037871A1 Piston and cylinder machines |
| 07/25/1978 | US4102249 Pneumatically driven devices |
| 06/13/1978 | US4094278 Two-stroke combustion engines |
| 05/09/1978 | US4088033 Piston power generating machine |
| 04/25/1978 | US4085710 Hydraulic engine piston |
| 03/14/1978 | US4078526 Rotary piston engine |
| 03/14/1978 | US4078389 Lost-motion refrigeration drive system |
| 03/07/1978 | US4077267 Fluid transducer |
| 10/18/1977 | US4054115 Miniature internal combustion engine |
| 08/30/1977 | US4044618 Machine drive mechanism |
| 08/09/1977 | US4040398 Four-cycle rotary engine and method of operation therefor |
| 08/02/1977 | US4038949 Rotary-radial internal combustion engine |
| 07/26/1977 | US4037572 Paired piston engine with rotary valves |
| 07/19/1977 | US4036027 Lost-motion refrigeration drive system |
| 05/31/1977 | US4026252 Engine construction |
| 03/22/1977 | US4013048 Bourke type engine |
| 12/21/1976 | US3998200 Reciprocating engine |
| 12/14/1976 | US3996903 Internal combustion engine |
| 11/16/1976 | US3991736 Ratchet driving internal combustion engine |
| 10/12/1976 | USRE29000 Hydraulic actuator |
| 10/12/1976 | US3985475 Expansible chamber device |
| 09/21/1976 | US3981280 Two-stroke combustion engines |
| 07/27/1976 | US3971296 Pneumatic actuators |
| 07/27/1976 | US3971259 Fluid transducer |
| 06/22/1976 | US3964450 Rotary cam internal combustion radial engine |
| 04/06/1976 | US3948230 Rotary engine provided with first and secondary rotatably mounted rotors |
| 03/16/1976 | US3943894 Internal combustion engine with clutch transmission |