Two point punch

Details Two point punch Two point punch

1990-08-08

1991-07-09

Phan, Hien H.

Cutlery

Perforating or indenting implements

With portion positioned in work aperture

30361, 83689, B26F 100

Patent

active

050293923

ABSTRACT:
This is concerned with a punch sometimes referred to as a draw punch which is constructed and arranged for enlarging holes in a large variety of materials, such as sheet metal, for example in junction boxes and the like where large tools cannot be used. More specifically this is concerned with a punch of the above type which is constructed and arranged to cut the metal or slug into two pieces so that they may be removed from the die without the assistance of a prying tool.

REFERENCES:
patent: 267751 (1882-11-01), Kennedy
patent: 1721007 (1929-07-01), Doherty et al.
patent: 1754568 (1930-04-01), Nisehan
patent: 1817223 (1931-08-01), Abramson
patent: 2214701 (1940-09-01), Scull
patent: 2221904 (1940-11-01), Abramson
patent: 2237069 (1941-04-01), Christenson
patent: 3728927 (1973-04-01), Pfleiderer
patent: 4543722 (1985-10-01), Adleman
patent: 4553164 (1985-10-01), Linquist et al.
patent: 4905557 (1990-03-01), Adleman
patent: 5269011 (1966-08-01), Herstrum

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