One-way clutch
AssigneeKoyo Seiko Co., Ltd.
InventorHideki Fujiwara
Life of this patent
Estimating the term…
Abstract
An inner ring is shaped in its contour by a cold-shaping treatment and is hardened on its surface by a nitrosulphurizing treatment or a soft-nitriding treatment. As a result, the hardness of the surface of the inner ring is enhanced by the cold-shaping treatment and further by the subsequent hardening treatment. As a result, the inner ring is improved in its wear resistance and its seizure resistance. Moreover, the hardening treatment is effected by the nitrosulphurizing treatment or the soft-nitriding treatment so that it can be suppressed from straining in that treating procedure.
Claims5
A one-way clutch comprising:
- an inner annulus;
- and an outer annulus arranged concentrically with said inner annulus, said two annuli being interchanged between a locked state for synchronous rotations and a free state for relative rotations in accordance with the positions of rollers arranged between said two annuli,
- wherein said inner annulus has a contour shaped by a cold-shaping treatment and a hardened layer nitrosulphurized on the surface of said contour.
A one-way clutch comprising:
- an inner annulus;
- and an outer annulus arranged concentrically with said inner annulus, said two annuli being interchanged between a locked state for synchronous rotations and a free state for relative rotations in accordance with the positions of rollers arranged between said two annuli,
- wherein said inner annulus has a contour shaped by a cold-shaping treatment and a hardened layer soft-nitrided on the surface of said contour.
A one-way clutch comprising:
- an inner annulus;
- and an outer annulus arranged concentrically with said inner annulus, said two annuli being interchanged between a locked state for synchronous rotations and a free state for relative rotations in accordance with the positions of rollers arranged between said two annuli,
- wherein said inner annulus has a contour shaped by a cold-shaping treatment and a hardened layer, as carburized and quenched in a salt bath, on the surface of said contour.
Dependencies are inferred from the claim text.