Knockout extracting tool

Details Knockout extracting tool Knockout extracting tool

1978-04-27

1979-09-11

Spruill, Robert Louis

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

81 346R, 225103, B23P 1904

Patent

active

041670566

ABSTRACT:
A hand tool for quickly, easily, and cleanly removing concentric knockout rings from electrical sheet metal enclosures. The tool is an elongated member fabricated of flat metal stock. Notches in opposite edges at one end of the tool are adapted to engage opposite inner edges of a knockout ring having a central opening. The tool is rocked back and forth pivoting the two halves of the knockout ring about the tabs retaining it in the sheet metal of the enclosure until the tabs fracture completely severing the knockout ring from the enclosure and providing an opening in the enclosure wall for accommodating cable or conduit.

REFERENCES:
patent: 2133752 (1938-10-01), Myer et al.
patent: 3579797 (1971-05-01), Pepe
patent: 3713200 (1973-01-01), Burns
patent: 3736643 (1973-06-01), Pepe
patent: 3770873 (1973-11-01), Brown
patent: 4034595 (1977-07-01), Smith

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