Patent ID: 9371912
Filing Date: 2016-06-21
CPC Classification: F16J

Claim Text:
1. Sliding parts for allowing opposing sealing faces of an annular stationary ring fixed on a fixed side and an annular rotating ring that rotates along with a rotating shaft to rotate relative to one another, thereby sealing a sealed fluid present on one side in the radial direction of said relatively rotational sealing faces; the sliding parts comprising: a plurality of dynamic pressure-generating grooves for generating dynamic pressure via the relative rotational sliding of the stationary ring and the rotating ring being formed in the circumferential direction on the sealing face of one of the stationary ring and the rotating ring so as to communicate with the sealed fluid-containing space; and pumping areas for generating pumping action via the relative rotational sliding of the stationary ring and the rotating ring being formed within the dynamic pressure-generating grooves, wherein a plurality of groups of the dynamic pressure-generating grooves are constituted by radial grooves and have bottom surfaces having tapered shapes tapering in opposite directions with respect to the circumferential direction so as to decrease in depth as they approach a boundary therebetween, wherein dam parts separating the dynamic pressure-generating grooves are provided at the boundary therebetween, and wherein two adjacent dynamic pressure-generating grooves separated by a dam part are taken as a single group.