MIXED-PHASE MOTOR

摘要

Motor apparatus which converts hydraulic energy and change of state expansion energy to mechanical energy. The motor (10) includes a main chamber (32) divided by a piston (34) into a charging chamber (36) and an exhaust chamber (38) during a first half cycle. Both sides of the main chamber (32) are in fluid communication during a second half cycle to form a motor chamber. During the first half cycle a valve (44) places the charging chamber (36) in fluid communication with a source of pressurized, saturated liquid and the exhaust chamber (38) in fluid communication with a drain port. A switch (70) senses the end of the charging/exhaust stroke and causes the valve (44) to move to a second position wherein the charging and motor chambers are placed in fluid communication with one another through the valve (44) to form the motor chamber throughout the extent of the power stroke. In certain circumstances, the piston (34) will move in a charging/exhaust stroke without any external force when the valve (44) is in the first position. Other embodiments, however, use a dual chamber operating in symmetry 180 degrees out of phase or an external force like a spring to move the piston (34).