| Patents for F01B 7 - Machines or engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders (730) |
|---|
| 08/05/1980 | US4215660 Internal combustion engine |
| 07/29/1980 | CA1082603A1 Reciprocating rotary engine |
| 07/15/1980 | US4212228 Power plant |
| 06/03/1980 | US4205594 Fluid operated apparatus |
| 05/20/1980 | US4203351 Fluid motor actuator for rotating a shaft back and forth |
| 05/13/1980 | US4202251 Generator for flow rate of pressurized fluid |
| 12/25/1979 | US4180028 Fluid operated device |
| 11/13/1979 | US4174195 Rotary compressor and process of compressing compressible fluids |
| 11/06/1979 | US4173439 Apparatus having expanding and contracting chamber |
| 06/12/1979 | CA1056263A1 Variable delivery hydraulic equipment |
| 05/29/1979 | CA1055362A Hydraulic cylinder with integral feedback cylinder |
| 03/13/1979 | US4143584 Electrohydraulic servo actuator with centering control |
| 02/13/1979 | US4139336 Expansible chamber apparatus with pairs of cylindrical rollers |
| 01/23/1979 | US4135864 Rotary compressor and process of compressing compressible fluids |
| 09/19/1978 | US4115037 Opposed piston internal combustion engine-driven pump |
| 06/13/1978 | US4094227 Fluid motor |
| 06/06/1978 | US4092957 Compression ignition internal combustion engine |
| 06/06/1978 | US4092829 Balanced compressor |
| 05/02/1978 | US4086845 Variable delivery hydraulic equipment |
| 01/31/1978 | US4071000 Double crankshaft valved two cycle engine |
| 11/15/1977 | US4058088 Oscillating piston engine |
| 11/08/1977 | US4057040 Internal combustion engine system |
| 07/26/1977 | US4037572 Paired piston engine with rotary valves |
| 06/21/1977 | US4030471 Opposed piston engine |
| 03/08/1977 | US4010675 Two stroke mechanism with rotary piston and cylinder-piston movement |
| 03/08/1977 | US4010611 Compression-expansion power device |
| 01/18/1977 | US4003351 Rotary engine |
| 09/07/1976 | US3978672 Gas operated engine |
| 08/17/1976 | US3974801 Oscillating piston internal combustion engine |
| 07/06/1976 | US3967535 Uniflow steam engine |