| 摘要 |
933,000. Friction clutches. FICHTEL & SACHS A.G. May 5, 1961 [June 30, 1960], No. 16458/61. Class 80 (2). [Also in Group XXXII] To render helical pressure springs in a friction clutch more resistant to the buckling effects of centrifugal force, the intermediate coils are of a smaller diameter than the end coils and may be formed either to one diameter, to stepped diameters or (Fig. 3, not shown) a hyperbolic curve. |
