Electricity: conductors and insulators – Conduits – cables or conductors – Single duct conduits
Patent
1993-11-29
1995-08-22
Picard, Leo P.
Electricity: conductors and insulators
Conduits, cables or conductors
Single duct conduits
220 32, 220266, 361641, H02G 308
Patent
active
054441838
ABSTRACT:
A polymeric electrical enclosure has an electrical access knockout having a plurality of concentric grooves integrally molded into a wall section of reduced thickness. A plurality of angularly spaced, frangible flow leaders all bridge the outermost groove, with a lesser number bridging the remaining concentric grooves to facilitate the flow of material during molding to the knockout segments defined by the grooves. The concentric grooves are progressively deeper from the outermost to the innermost to aid in selective removal of inner segments without fracture of the outer segments. A flow leader which bridges all the grooves becomes narrower at the inner grooves, as less material need flow through that section of the flow leader, and the narrower section fractures sooner, thus aiding in selective removal of the inner segments of the knockout.
REFERENCES:
patent: 3278807 (1966-10-01), Galante et al.
patent: 3587906 (1971-06-01), Pepe
patent: 3801875 (1974-04-01), Morby et al.
patent: 3852514 (1974-12-01), Lauben
patent: 4118754 (1978-10-01), Duggan
patent: 4675782 (1987-06-01), Hibbert et al.
patent: 4688146 (1987-08-01), Newmark et al.
patent: 4698727 (1987-10-01), Hibbert et al.
patent: 4717987 (1988-01-01), Newmark et al.
patent: 4916574 (1990-04-01), Hancock et al.
patent: 4931898 (1990-06-01), Cole
patent: 4931902 (1990-06-01), Cole
patent: 4962443 (1990-10-01), Cole
patent: 5013870 (1991-05-01), Navazo
patent: 5043536 (1991-08-01), De Bartolo, Jr.
patent: 5057026 (1991-10-01), Sawal et al.
patent: 5067905 (1991-11-01), Matsumoto et al.
patent: 5068495 (1991-11-01), Dahl-Bettermann-Winand
patent: 5072071 (1991-12-01), Cassity et al.
patent: 5134543 (1992-07-01), Sharp et al.
patent: 5148348 (1992-09-01), White
patent: 5191171 (1993-03-01), Bordwell
patent: 5300731 (1994-04-01), DeBartolo, Jr. et al.
Gehrs Donald F.
White Percy A.
Eaton Corporation
Moran Martin J.
Picard Leo P.
Tone David
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