Mitsubishi Heavy Industries Limited

Kabushiki Kaisha Riken

Yuichi Kihara

Kimihiko Mitsuda

Motoshi Harada

Kenji Nakamichi

Hideaki Asai

Jun Fukada

Daisuke Hirayama

Provided is a piston ring including: a low-pressure side ring; and a high-pressure side ring, the low-pressure side ring and the high-pressure side ring are arranged stacked in a direction along the axis so that the high-pressure side ring is closer to a fluid to be compressed, a low-pressure side rotation restriction part configured to restrict rotation in the circumferential direction relative to the piston is formed to the low-pressure side ring, a high-pressure side rotation restriction part configured to restrict rotation in the circumferential direction relative to the piston and a low-pressure side protrusion protruding toward the low-pressure side ring and inserted in the low-pressure side abutment are formed to the high-pressure side ring, and the low-pressure side protrusion is inserted in a low-pressure side abutment with clearances being provided in both sides in the circumferential direction between the low-pressure side ring and the low-pressure side protrusion.

Piston ring and booster pump

Growing community of inventors

Tokyo, Japan

Yuichi Kihara