US5354242 1992年10月8日 1994年10月11日 St John Richard C Automatic belt tensioner with an enclosed flat wire power spring and improved zeroing and damping meansUS5354242 Oct 8, 1992 Oct 11, 1994 St John Richard C Automatic belt tensioner with an enclosed flat wire power spring and improved...
In one form of the invention, the spring itself is fixed at one end to the prime mover and the other end to a tensioner arm so as to operate on the idler pulley and maintain the belt tension and provide the damping. The hysteresis of the spring responding to pulley movement thus assist...