Patent ID: 6367599
Filing Date: 2002-04-09
Classification: F16D

Abstract:
A ventilated disc comprising:a ring-like inner disc portion; a ring-like outer disc portion; and connecting ribs for connecting surfaces of said inner and outer disc portions, said connecting ribs including: first connecting ribs provided between inner-diameter-side portions of said inner and outer disc portions and long in radial directions of said inner and outer disc portions; second and third connecting ribs provided alternately circumferentially between outer-diameter-side portions of said inner and outer disc portions and inclined reversely to each other with respect to radial directions of said inner and outer disc portions, fourth connecting ribs provided at a circumferentially central portion of a largest distance between adjacent ones of said second and third connecting ribs and between said outer-diameter-side portions of said inner and outer disc portions, wherein said inner and outer disc portions are opposed to each other and are parallel, and coaxial, and are at a predetermined distance therebetween.