Patent ID: 9435327
Filing Date: 2016-09-06
CPC Classification: F04B

Claim Text:
1. A shoe comprising: a spherical portion having a spherical surface that slides in a hemispherical concave portion of a first movable member, with neither a groove nor a concave portion being formed on the spherical surface; an end surface portion having a sliding surface that slides on a flat surface of a second movable member; a cylindrical portion formed between the spherical portion and the end surface portion, the cylindrical portion being unitary with the spherical portion and the end surface portion; and a plurality of grooves formed on an outer peripheral surface of the cylindrical portion for holding a lubricant oil, the grooves having a constant depth, a rectangular sectional shape and extending continuously from the spherical portion to the end surface portion, wherein the cylindrical portion does not slide in either the hemispherical concave portion of the first movable member or on the flat surface of the second movable member.