Torque limiting coupling device

Details Torque limiting coupling device Torque limiting coupling device

2005-06-21

2005-06-21

Binda, Greg (Department: 3679)

Rotary shafts, gudgeons, housings, and flexible couplings for ro

Having lubricating means

For overload release coupling

C464S031000

Reexamination Certificate

active

06908393

ABSTRACT:
A torque-limiting coupling device including a cylindrical sleeve and a cylindrical shaft in radially tensioned frictional engagement for transferring torque up to a torque limit that corresponds to the radial tension and at which the sleeve begins to rotate relative to the shaft. The device also includes at least one pump mechanism which is adapted to be driven to pump liquid to the interface between co-acting surfaces of the sleeve and shaft upon relative rotation between the sleeve and the shaft. The shaft includes a surface layer that defines one of the co-acting surfaces and that is made of a material, e.g. tombak, whose plasticizing limit is lower than the plasticizing limit of the material in the co-acting surface of the sleeve. The surface layer may include cavities which enable the surface layer to take a smaller radial thickness after plasticization thereof.

REFERENCES:
patent: 2447384 (1948-08-01), Wolff
patent: 3193068 (1965-07-01), Greve et al.
patent: 3751941 (1973-08-01), Stiff
patent: 4132300 (1979-01-01), Grandia
patent: 4341484 (1982-07-01), Peterson et al.
patent: 5069320 (1991-12-01), Falk
patent: 2 268 569 (1994-01-01), None
patent: 1673763 (1991-08-01), None
patent: 90/00231 (1990-01-01), None
Machinery's Handbook, 25thed., New York, International Press, 1996. pp. 2473 & 2474. TJ151.M3 1996.

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