Electromagnetic only vane coordination of a cat and mouse engine

Method for expanding a gas flow and device thereby applied

HYDRAULIC GEAR MOTOR, GEAR PUMP AND GEARBOX WITH CONTINUOUSLY VARIABLE PARAMETERS

Variable speed control of fluid driven tools

Variable speed control of fluid driven motors

Gas driven rotation motor, a tool provided with a gas driven rotation motor and a method for regulating speed of a gas driven rotation motor

Transmission between rotary devices

Pneumatic tool

Heat cycle

System utilizing waste heat of internal combustion engine