Coil spring hooking method and apparatus

Wireworking – Loop forming – Coil springs

Patent

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Details

B21F 3502

Patent

active

047459514

ABSTRACT:
A method and apparatus for forming at least one end of a coil spring blank into a hook, in which the blank is releasably clamped on a carriage at the first of a series of succeeding stations through which the carriage is movable. Where an end loop of the coil is to be formed into a hook that loop is bent into a position transverse to the axis of the coil of the blank at a second station and at a further succeeding station the free end of the loop is severed to a predetermined length. Where a laterally extending leg of the blank is to be formed into a hook the leg is bent into a position transverse to the axis of the coil of the blank at a second station, the leg is bent at a third station to form a hook, and at a fourth station the free end of the leg is severed to a predetermined length.

REFERENCES:
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patent: 1498638 (1924-06-01), Periolat
patent: 2005375 (1935-06-01), Jones et al.
patent: 2650634 (1953-09-01), Young et al.
patent: 2809675 (1957-10-01), Silko
patent: 3195583 (1965-07-01), Jones
patent: 3253622 (1966-05-01), Hammersmith
patent: 3351101 (1967-11-01), Halvorsen et al.
patent: 3405772 (1968-10-01), Guenther
patent: 3672410 (1972-06-01), Scheckel
patent: 3805576 (1974-04-01), Brauer
patent: 3874425 (1975-04-01), Guenther

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