Automatic chain lock

Details Automatic chain lock Automatic chain lock

1997-01-24

1998-06-30

Larson, Lowell A.

Metal deforming

With means to drive tool

With means to permit tool positioning

72705, B21D 112

Patent

active

057717397

ABSTRACT:
An automatic chain lock allows successive pulls on a vehicle on a straightening apparatus without manipulation of the chain lock between actuations of the fluid cylinder. A pair of gates provides a ratchet arrangement for the chain, the lower gate holding the chain while the lower gate is moved down to pull the chain and cause the chain to ratchet through the upper gate; and, when the movement reaches its end, the upper gate secures the chain while the chain ratchets through the lower gate. The procedure is then repeated, the lower gate again moving down to make another pull on the vehicle. Each gate has a pair of flanges that pivot down, but are held against pivoting up. The two gates are arranged with respect to each other so that each will engage a link of the chain at the appropriate time in the cycle.

REFERENCES:
patent: 4386517 (1983-06-01), Harmon
patent: 5146775 (1992-09-01), Ballard et al.
patent: 5257526 (1993-11-01), Teixeria
patent: 5415023 (1995-05-01), Hinson
patent: 5640878 (1997-06-01), Hinson

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