US Patent No. 10,989,249

SLIDING COMPONENT


Patent No. 10,989,249
Issue Date April 27, 2021
Title Sliding Component
Inventorship Yuta Negishi, Tokyo (JP)
Hideyuki Inoue, Tokyo (JP)
Takeshi Hosoe, Tokyo (JP)
Yuichiro Tokunaga, Tokyo (JP)
Assignee EAGLE INDUSTRY CO., LTD.

Claim of US Patent No. 10,989,249

1. A sliding component comprising:a pair of sliding parts of annular shapes, the sliding parts having respective sliding faces sliding relatively to each other, at least one of the sliding faces being provided with a positive pressure generation mechanism with a positive pressure generation groove, a negative pressure generation mechanism with a negative pressure generation groove, a land, and a deep groove,
wherein the land separates the positive pressure generation groove and the negative pressure generation groove from an opposite-to-sealed-fluid side,
wherein the deep groove is deeper than a groove depth of the positive pressure generation groove and the negative pressure generation groove, and includes a radius-direction groove and a circumferential groove,
wherein the radius-direction groove has an inlet portion communicating with a sealed fluid side, the circumferential groove has communicating portions communicating with the radius-direction groove at each end, and
wherein the positive pressure generation groove or the negative pressure generation groove is radially spaced in a plurality of rows, and the circumferential grooves are arranged on the opposite-to-sealed-fluid side of each of the positive pressure generating groove and the negative pressure generating groove, and in a radial direction space between the positive pressure generation groove and the negative pressure generation groove.