Patent ID: 6145636
Filing Date: 2000-11-14
Classification: F16D

Abstract:
A ventilated rotor, comprising:a first slide board;a second slide board which faces said first slide board; anda total of N-numbered ribs, where N is a natural number not less than 2, provided between said first slide board and said second slide board, wherein the N-numbered ribs are radially elongated, spaces between said N-numbered ribs forming ventilation holes,wherein said first slide board and said second slide board have a common central axis, and N reference providing positions spaced at an equal angular interval in a circumferential direction around said common central axis, wherein among said N-numbered ribs is a first set of N/n-numbered ribs, n is a natural number not less than 2, and N/n is a natural number, provided at an interval of n-numbered ribs in said circumferential direction and respectively shifted from a corresponding one of said reference providing positions by a prescribed angle in one direction of said circumferential direction, and a second set of ribs, which are all of the ribs other than ribs in the first set, provided in said reference providing positions.