Electrical knock-out method and tool

Details Electrical knock-out method and tool Electrical knock-out method and tool

1990-09-25

1991-10-22

Crane, Daniel C.

Metal deforming

Process

Deforming sheet metal

72387, 72409, 29764, 29268, 81426, 220266, B21D 5300, B21D 500

Patent

active

050584146

ABSTRACT:
A method of removing electrical box knock-outs which includes utilizing a hand tool which has elongated jaws, one with a ring and the other with a punch directed toward the center of the ring. By positioning the jaws on opposite sides of a box wall and closing the jaws, the punch and ring close on the knock-out and the punch deflects the knock-out through the ring so that the knock-out can then be twisted and removed by needle nose pliers, for example.

REFERENCES:
patent: 895441 (1908-08-01), Dorff
patent: 1154718 (1915-09-01), Neff
patent: 1316409 (1919-09-01), Bahre
patent: 1435150 (1922-11-01), Carpenter
patent: 1678313 (1928-07-01), Atkinson
patent: 1746016 (1930-02-01), Shiffman
patent: 2301079 (1942-11-01), Phipps
patent: 4787139 (1988-11-01), Sweet
patent: 4825339 (1989-04-01), Boudon

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