Daikin Industries, Ltd.

Takahiro Doi

Hiroyuki Taniwa

A pistonhas a generally cylindrical-shaped roller and a blade that is integrally formed with the roller. The pistonperforms a swing motion while orbitally revolving within a cylinder chamber of a cylinder. A light-load side portion of an inner circumferential sliding surface of the roller is provided as a small-width portion which is smaller in width than a heavy-load side large-width portion. The small-width portion is formed over a range from a point A resulting from a 30&#xb0; displacement to a point B resulting from a 180&#xb0; displacement in a rotational direction of the drive shaft from a base point which is given by a joining point O of the roller with the blade. The pistonorbitally revolves within the horizontal plane, and the small-width portion of the roller serves as an oil sump in such a manner that upper side portion of the inner circumferential sliding surface is cut out.

Growing community of inventors

Kusatsu, Japan

Takahiro Doi