Metal working – Bias cutting of tubular stock
Patent
1989-06-29
1992-07-21
Eley, Timothy V.
Metal working
Bias cutting of tubular stock
29 122, B21K 2106
Patent
active
051311232
ABSTRACT:
A bullet is manufactured by providing a slug of metal having an end face and applying an axial force against the end face of sufficient magnitude to form an axially outwardly opening first cavity. Thereafter a second force is applied against the first cavity to reform the first cavity into a second cavity having a peripheral edge of a generally scalloped configuration and an interior surface defining tears of alternating triangular flat faces set-off by edges converging toward a blind end of the cavity. The end portion is then contoured into a generally convex curvature which constricts the scalloped peripheral edge and transforms the triangular faces into radially inwardly directed ribs and alternating lines of weakness which, upon bullet impact, control radial expansion and axial tearing of petals formed during impact which creates maximum hydraulic shock in the absence of fragmentation which in turn ensures humane killing of game.
REFERENCES:
patent: 2573634 (1951-10-01), Whipple
patent: 3165809 (1965-01-01), Burns, Jr. et al.
patent: 3311962 (1967-04-01), Burns, Jr.
patent: 4610061 (1986-09-01), Halverson
Barnes Bullets, Inc.
Eley Timothy V.
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