| Patents for F02B 71 - Free-piston engines; Engines without rotary main shaft (1,404) |
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| 11/20/1984 | US4484082 Power plant and process utilizing gravitational force |
| 11/13/1984 | US4481772 Gas turbine power production unit including a free piston gas generator |
| 11/13/1984 | CA1177655A1 Opposed piston type free piston engine pump unit |
| 11/07/1984 | EP0123808A2 Method and apparatus for starting diesel type hammers |
| 10/16/1984 | US4476681 Balance free-piston hydraulic pump |
| 10/09/1984 | US4475335 Free piston heat engines |
| 09/25/1984 | US4473123 Diesel hammer capable of delivering uplift blows and method of using same |
| 08/22/1984 | EP0116490A1 Piston for internal combustion engine |
| 08/21/1984 | CA1172964A1 Two-stroke internal combustion engine |
| 07/03/1984 | CA1170310A1 Power plant and process utilizing gravitational force |
| 05/22/1984 | US4450060 Separating hydrogen and oxygen from water |
| 03/06/1984 | US4435133 Free piston engine pump with energy rate smoothing |
| 02/16/1984 | WO1984000571A1 Diesel hammer capable of delivering uplift blows and method of using same |
| 12/22/1983 | WO1983004426A1 Free piston compression engine |
| 12/13/1983 | CA1158719A1 Power plant |
| 11/16/1983 | EP0093732A1 Device in a pressure system. |
| 11/15/1983 | US4415313 Hydraulic generator with free-piston engine |
| 11/15/1983 | US4414927 Two stroke oscillating piston engine |
| 11/02/1983 | EP0093028A1 Free piston internal-combustion generator |
| 11/01/1983 | US4412476 Tandem machine with opposed free pistons |
| 10/04/1983 | US4407240 Opposed piston internal combustion engine with special scavenging means |
| 09/13/1983 | US4403577 Free piston internal combustion engines |
| 09/06/1983 | US4403153 Free-piston electric current generator |
| 08/31/1983 | EP0087242A1 Power plant |
| 08/24/1983 | EP0086622A1 Free piston hot gas engine |
| 08/23/1983 | US4399654 Power plant having a free piston combustion member |
| 08/16/1983 | US4399368 Power plant and process utilizing gravitational force |
| 08/16/1983 | CA1152004A1 Internal combustion engine |
| 05/31/1983 | US4385597 Two-stroke internal combustion engine |
| 05/26/1983 | WO1983001816A1 Oil pump with oscillating piston |
| 05/11/1983 | EP0078561A2 Free piston internal-combustion engine with an independently driven cam |
| 04/26/1983 | CA1145264A1 Thermal impulse generator |
| 03/29/1983 | US4377991 Internal combustion apparatus |
| 02/15/1983 | US4373256 Method of making rotor coil of coreless motor |
| 02/09/1983 | EP0062664A4 Power plant and process utilizing solar energy. |
| 02/08/1983 | US4372256 Char burning free piston gas generator |
| 01/18/1983 | US4369021 Free-piston engine pump |
| 01/12/1983 | EP0028224B1 Tandem machine with opposite free pistons |
| 12/22/1982 | EP0031344B1 Machine with multi tandem free pistons |
| 12/21/1982 | US4364336 Self starting of internal combustion engines based on reactor |
| 10/27/1982 | EP0063514A1 Medium power free-piston electric generator |
| 10/20/1982 | EP0062664A1 Power plant and process utilizing solar energy |
| 09/28/1982 | CA1132458A1 Multi-tandem free sliding piston machine |
| 09/28/1982 | CA1132457A1 Tandem machine with free sliding opposed pistons |
| 08/11/1982 | EP0057300A1 Internal combustion engine arrangement |
| 08/03/1982 | US4342920 Power plant and process utilizing gravitational force |
| 06/01/1982 | US4332219 Electrocombustion engine |
| 04/29/1982 | WO1982001395A1 Power plant and process utilizing gravitational force |
| 04/27/1982 | US4326380 Hydraulic engine |
| 03/31/1982 | EP0048697A1 Plant to convert gas-expansion energy into another form of energy by means of the reciprocating movement of at least one mobile piece |
| 03/30/1982 | US4321904 Internal combustion engine with auxiliary combustion chamber |
| 03/16/1982 | US4319546 Hydraulic combustion engine |
| 03/04/1982 | WO1982000685A1 Two stroke oscillating piston engine |
| 02/10/1982 | EP0045472A1 Hydraulic power generator driven by a free piston engine |
| 01/20/1982 | EP0044252A1 Method and system for the propulsion of a wheeled vehicle, comprising a hydraulic transmission |
| 01/05/1982 | US4308720 Linear engine/hydraulic pump |
| 11/04/1981 | EP0039164A2 Power plant |
| 09/29/1981 | CA1109732A1 Free piston engine pump with energy rate smoothing |
| 07/08/1981 | EP0031344A1 Machine with multi tandem free pistons. |
| 05/26/1981 | US4270054 Power plant |
| 05/13/1981 | EP0028224A1 Tandem machine with opposite free pistons. |
| 01/13/1981 | US4244331 Free piston gas generator assemblies |
| 01/08/1981 | WO1981000019A1 Machine with multi tandem free pistons |
| 01/07/1981 | EP0020492A1 Free piston gas generator assemblies |
| 12/02/1980 | US4236295 Method of making rotor coil of coreless motor |
| 11/13/1980 | WO1980002442A1 Tandem machine with opposite free pistons |
| 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 |
| 07/22/1980 | CA1082107A1 Internal ballistic engine |
| 07/08/1980 | US4211082 Internal combustion engine with free floating auxiliary piston |
| 07/08/1980 | CA1081269A1 Hydraulic inertia filled spring |
| 06/03/1980 | US4205638 Fluid power supply system |
| 06/03/1980 | US4205528 Compression ignition controlled free piston-turbine engine |
| 05/06/1980 | CA1077166A1 Marine gas exploder |
| 04/17/1980 | WO1980000730A1 Free piston gas generator assemblies |
| 02/06/1980 | EP0007874A1 Installation for producing energy with a free-piston generator |
| 11/27/1979 | US4175733 Hydraulic inertia filled spring |
| 10/02/1979 | US4169433 Rotational machine |
| 09/18/1979 | US4167922 Internal ballistic engine |
| 05/15/1979 | US4154200 Non-polluting heat machine with internal combustion |
| 04/24/1979 | CA1053072A1 Matrix printer incorporating intermittent ink ribbon transport |
| 03/06/1979 | US4142485 Method and device for ensuring the safety in a free piston machine |
| 12/05/1978 | US4128083 Gas cushioned free piston type engine |
| 10/10/1978 | CA1040103A1 Diesel pile hammer with vent for starting |
| 09/12/1978 | US4112683 Controlled pulse turbine engine |
| 05/02/1978 | US4087205 Free-piston engine-pump unit |
| 04/25/1978 | US4085711 Free piston engine with opposed cylinders |
| 04/25/1978 | US4085710 Hydraulic engine piston |
| 09/20/1977 | US4048970 Fuel injector |
| 09/06/1977 | US4046115 Free piston engine fuel feeding apparatus |
| 06/28/1977 | US4031920 Pressurized hydraulic sump system |
| 05/03/1977 | US4020804 Diesel pile hammer with vent for starting |
| 04/12/1977 | US4016952 Marine gas exploder |
| 04/12/1977 | US4016719 Hydrostatic transmission system |
| 02/15/1977 | US4007804 Apparatus for removal of condensation from a marine gas exploder device |
| 12/21/1976 | US3998049 Steam generating apparatus |
| 12/07/1976 | US3995427 Multiple-phase combustion engine embodying hydraulic drive |
| 11/23/1976 | US3993181 Matrix printer incorporating intermittent ink ribbon transport |
| 10/19/1976 | US3986796 Direct action compressor fitted with a one-piece piston |
| 09/07/1976 | US3978827 Piston engine employing oxygen |