Patent ID: 8714825

Claim:
A plain bearing for supporting a crank shaft of an internal combustion engine, the plain bearing comprising: a pair of semicylindrical members constituting the plain bearing, each semicylindrical member including: two crush reliefs, each crush relief arranged in a region adjacent to a circumferential end surface of an inner circumferential surface of the semicylindrical member and gradually reducing in thickness towards the circumferential end surface, and a main cylindrical surface aside from the crush reliefs in the inner circumferential surface of the semicylindrical member; wherein in each semicylindrical member one crush relief at a forward side in a rotation direction of the crank shaft or two crush reliefs at both sides include a radially outwardly convex curved surface at a side closer to the end surface and a radially inwardly convex curved surface at a side farther from the end surface.