Box with knock-outs for build-in equipment, in particular electr

Details Box with knock-outs for build-in equipment, in particular electr Box with knock-outs for build-in equipment, in particular electr

1991-05-28

1992-06-30

Marcus, Stephen

Receptacles

Closures

With closure opening arrangements for means

220270, 220276, 220 32, 220 38, 174 65R, B65D 5122, H02G 308

Patent

active

051255278

ABSTRACT:
A box for equipment to be built into a wall or the like comprises at least one inlet provisionally closed by a knock-out. The knock-out is delimited by a line of reduced strength. A pull member is fastened to it to facilitate the application of a traction force to it.

REFERENCES:
patent: 1646622 (1927-10-01), Mason
patent: 1962317 (1934-06-01), Mangin
patent: 1980831 (1934-11-01), Rosenfield
patent: 2068988 (1937-01-01), Knell
patent: 2357754 (1944-09-01), Moll
patent: 2574382 (1951-11-01), Falson
patent: 3333501 (1967-08-01), Pitcher
patent: 3773209 (1973-11-01), Schane
patent: 4087018 (1978-05-01), Tebbutt
patent: 4103101 (1978-07-01), Maier
patent: 4149028 (1979-04-01), Gressitt et al.
patent: 4389535 (1983-06-01), Slater et al.
patent: 4649230 (1987-03-01), Nielson
patent: 4819819 (1989-04-01), Robertson
patent: 4948441 (1990-08-01), Peck

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