Electrical box with coupling members

Details Electrical box with coupling members Electrical box with coupling members

1989-02-15

1990-09-04

Picard, Leo P.

Electricity: conductors and insulators

Boxes and housings

With electrical device

H02G 308

Patent

active

049546678

ABSTRACT:
An electrical wall or ceiling box adapted to rapidly and securely couple an electrical wiring device thereto. The electrical box includes a pair of wedge-shaped inserts positioned within a pair of openings in the end walls of the electrical box. The inserts have a threaded, curved face portion for gripping a mounting screw and an oppositely facing sloping face portion for interacting with the sloping wall portions of the openings in the electrical box. The inserts also have a shoulder extending outwardly on three sides for engaging a three-sided ledge within the openings for retaining the inserts therein. This structure results in a significantly higher retention force than in prior devices, tending to resist disengagement of the inserts with the box upon insertion of a mounting screw therein.

REFERENCES:
patent: 3955463 (1976-05-01), Hoehn
patent: 4315100 (1982-02-01), Haslbeck et al.
patent: 4424405 (1984-01-01), Nattel

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