Stationary key mounting in fastener tool

Details Stationary key mounting in fastener tool Stationary key mounting in fastener tool

1996-05-20

1998-07-14

Meislin, D. S.

Tools

Wrench, screwdriver, or driver therefor

Machine

81 5714, B25B 2100

Patent

active

057787417

ABSTRACT:
There is disclosed a method for the assembly of an aerospace fastener system of a torque limiting, frangible collar nut and pin in a non-interference fit application wherein the pin develops increased frictional resistance to rotation with increased torque loading applied to the fastener. In the method, the nut is run up on the pin while rotation of the pin is retarded by a key which has a limited rotational movement and which is restrained against rotation by a resilient spring force. The method is practiced with an improved L-head for a rotationally driven tool in which the key holder of the L-head has a limited degree of rotational moveability which is resilient restrained by a spring link which includes a cable which is passed about a stationary drum to provide a dampening of the spring force. The invention greatly extends the useful life of keys as the torsional loads transmitted to the keys are held within safe limits.

REFERENCES:
patent: 4538483 (1985-09-01), Batten
patent: 4721022 (1988-01-01), Batten
patent: 5109735 (1992-05-01), Hart
patent: 5305666 (1994-04-01), LaTorre
patent: 5553519 (1996-09-01), Pettit, Jr.

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