A method of forming tapered channels for scissors jack

Details A method of forming tapered channels for scissors jack A method of forming tapered channels for scissors jack

1993-03-31

1994-05-03

Rosenbaum, Mark

Metal working

Expanded metal making

29559, 29897, 723792, B21D 3104

Patent

active

053075480

ABSTRACT:
A method of forming a tapered channel for a jack which uses less material comprising forming curved openings in the center portion of the channel and then stretching the middle portion of the channel so that it is tapered to produce a tapered channel.

REFERENCES:
patent: 1531290 (1925-03-01), Lochhead et al.
patent: 1901915 (1930-06-01), Loughridge
patent: 2023410 (1935-02-01), Davis et al.
patent: 3740812 (1973-06-01), Ryan
patent: 4017936 (1977-04-01), Schweikert
patent: 4487053 (1984-12-01), Bauer et al.
patent: 4545170 (1985-10-01), Shirey
patent: 5064171 (1991-11-01), Engel

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