Hydraulic engine

Hydraulic motion conversion device for engines

Hydraulic switching valve, and a free piston engine provided the

Internal combustion driven pumping system and variable torque tr

Internal combustion engine

Internal combustion engine and output motion transducer

Internal combustion engine with fluid drive output

Internal combustion hydraulic engine

Internal combustion hydraulic motor and method of operation

Internal combustion turbine engine

Linear engine/hydraulic pump

Method of controlling a free piston external combustion engine

Multiple-phase combustion engine embodying hydraulic drive

Power plant having a free piston combustion member

Single free-piston external combustion engine with hydraulic pis

Supercharged diesel type apparatus for the generation of power

System for efficiently converting hydrocarbons into power

Thermal cycle for operation of a combustion engine