Patent ID: 7997397
Filing Date: 2011-08-16
Classification: F16D

Abstract:
1. A one-way roller clutch comprising: an outer ring; an inner ring mounted inside said outer ring and having an outer cylindrical surface, said outer ring having an inner periphery with a plurality of cam surfaces thereon, each of said cam surfaces defining a wedge-shaped space in cooperation with the outer cylindrical surface of said inner ring; rollers each mounted between said outer cylindrical surface and one of said cam surfaces, and each of said rollers having a diameter; and coil springs each biasing one of said rollers toward a narrow portion of a corresponding one of said wedge-shaped spaces; wherein each of said coil springs has a first end facing the roller and a second end remote from the roller; wherein each of said coil springs has, at said first end thereof, a radially outwardly extending spiral roller abutment portion; wherein each of said coil springs has a main portion extending from said second end thereof to said radially outwardly extending spiral roller abutment portion; wherein, for each of said coil springs, said radially outwardly extending spiral roller abutment portion has an outer diameter larger than a largest outer diameter of said main portion; wherein, for each of said coil springs, the outer diameter of the radially outwardly extending spiral roller abutment portion is configured with respect to a respective one of the wedge shaped spaces between the inner ring and the outer ring and the diameter of a respective one of the rollers such that there is insufficient radial space for the first end of the coil spring to separate from the respective roller by slipping along a surface of the respective roller.