Tightening screw

Details Tightening screw Tightening screw

1993-03-15

1996-11-26

Wilson, Neill R.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Torque responsive nut or bolt driving connection

Resilient connection

411402, 411432, F16B 3100, F16B 3708

Patent

active

055778704

ABSTRACT:
The tightening screw of the invention comprises a screw member forming female threads or male threads in a shaft core part, a flange ring fitted to the outer periphery of the screw member to contact with the object to be tightened, an operating ring for feeding a rotational force by fitting oppositely to the flange ring on the outer periphery of the screw member, and a torque transmitting member interposed between the screw member and operating ring for transmitting the rotational force of the operating ring to the screw member, wherein the torque transmitting member comprises a rotation number reduction mechanism for transmitting the rotational force of the operating ring to the screw member by reducing the rotation number and thereby increase the transmitted torque, and a unidirectional torque limiter for cutting off transmission of torque in the tightening direction of the screw member to the object to be tightened at a specific load.

REFERENCES:
patent: 3425314 (1969-02-01), Ohlson
patent: 4159667 (1979-07-01), Nordstrom
patent: 4176582 (1979-12-01), Witte
patent: 4687392 (1987-08-01), Bidwell
patent: 4955744 (1990-09-01), Barth et al.
patent: 5016931 (1991-05-01), Jackson

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