Eccentric knockouts

Details Eccentric knockouts Eccentric knockouts

1991-01-23

1993-03-02

Picard, Leo P.

Electricity: conductors and insulators

Conduits, cables or conductors

Single duct conduits

220 32, 220268, B65D 4132

Patent

active

051911710

ABSTRACT:
A circular inner knockout and a non-circular outer knockout formed in a wall are individually connected to the wall by frangible webs located opposite from one another. The frangible web connecting the inner knockout to the wall is stronger than the frangible web connecting the outer knockout to the wall. The periphery of the outer knockout includes by a plurality of interconnected discrete circular curved portions, and does not completely surround the inner knockout.

REFERENCES:
patent: 1805003 (1931-05-01), Newman
patent: 1850165 (1932-03-01), Barnett
patent: 2154310 (1939-04-01), Kinnard
patent: 2240187 (1941-04-01), Kingdon et al.
patent: 2663454 (1953-12-01), Olson
patent: 2850916 (1958-09-01), Kingdon
patent: 2927149 (1960-01-01), Kern, Jr.
patent: 3333501 (1967-08-01), Pitcher
patent: 3587906 (1971-06-01), Pepe
patent: 3877601 (1975-04-01), Evans et al.
patent: 4640433 (1987-03-01), Jorgensen et al.
patent: 4758180 (1988-07-01), Wills et al.
Square D Company, "Safety Socket Boxes", Jun. 1984. One Sheet.

Affiliated with

Also associated with

Rating

Eccentric knockouts does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Eccentric knockouts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Eccentric knockouts will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-128172