Nippo Corporation

Yugen Kaisha K. R & D

Air Surf Marketing Inc.

Isao Shimazu

Fumito Komatsu

Satoru Washio

Naoya Ishida

The object of the present invention is to provide a fluid rotary machine in which dead spaces can be reduced as much as possible even if the machine is enlarged by arranging rotary valves directly behind cylinder chambers. The fluid rotary machine in which first and second double-headed pistons () intersecting within a case body () move linearly back and forth within cylinders () due to the hypocycloid principle along with rotation of shafts () and in which intake and exhaust cycles are repeated in chambers (), wherein cylinder heads () for closing the cylinder chambers () are each provided with rotary valves () which are rotated by drive transmission from the shafts () and which are provided with intake holes and discharge holes () alternately communicated with the cylinder chambers () via communication channels (), and the rotary valves () intersect longitudinal axis of the opposing pistons () and are capable of rotating parallel with output axil lines.

Fluid rotary machine

A fluid rotary machine with a decreased footprint and a reduction in the number of parts. The fluid rotary machine has four heads wherein double-headed pistons are disposed inside cylinders in a crisscross arrangement. The rotational balance between rotational parts including the double-headed pistons is achieved only by first and second balance weights which are inserted and incorporated into both ends of a crank shaft coupled eccentrically to a shaft. The shaft is rotated for the double-headed pistons to linearly reciprocate in the cylinders. The fluid rotary machine has rotary valves for switching between the suction and discharge operations of the fluid for each cylinder chamber. The rotary valves are incorporated into a case to be coaxial and integrally rotatable with the shaft.

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Inazawa, Japan

Isao Shimazu