Method of forming a clevis link

Details Method of forming a clevis link Method of forming a clevis link

1995-07-25

1996-07-09

Jones, David

Chain, staple, and horseshoe making

Chain making

Sheet metal

59 351, 59 91, 403 79, 180 684, B21L 1100, B60K 1100

Patent

active

055333281

ABSTRACT:
A link is formed by forming a bubble between the longitudinal side edges of the link extending from the forward end of the link to a location spaced from the rearward end of the link so as to form laterally spaced upwardly extending side walls proximate the forward end of the piece spaced inboard from the respective longitudinal side edges of the link, forming the rearward end of the link into a curl to form a first bearing surface defining the rearward pivot axis, bending the longitudinal side edges of the piece upwardly to form an edge flange positioned proximate the forward end of the link outboard of each side wall, removing the bubble proximate the forward end of the link while leaving the side walls intact so as to form the clevis configuration at the forward end of the link, and forming aligned holes in each edge flange and its associated side wall to form a second bearing surface defining the forward pivot axis.

REFERENCES:
patent: 1107808 (1914-08-01), Locke
patent: 1448663 (1923-03-01), Hoya
patent: 3312117 (1967-04-01), Gritt
patent: 3359814 (1967-12-01), Krummer et al.
patent: 4579184 (1986-04-01), Hiramoto
patent: 5435661 (1995-07-01), Zmyslowski et al.

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