One-way clutch 18 has a spring the elastic modulus of which is limited up to a predetermined value, seal rings 36a, 36b have a sliding resistance with respect to the inner rings 22 which is limited up to a predetermined value, and support bearings 17a, 17b have a rotation resistance which is limited...http://www.google.de/patents/US6394250?utm_source=gb-gplus-sharePatent US6394250 - Alternator pulley unit with a built-in one-way clutch
