US 4,077,434 AGranted

Sealed lay-in conduit duct

AssigneeFederal Cartridge Company

InventorsEdgar W. Sieckert, Robert D. Frayseth, John R. Breckenridge

Life of this patent

Estimating the term…

Loading patent…

Abstract

A sealed lay-in electrical conduit duct which is oil-tight and is comprised of U-shaped sealing collars which telescope into adjacent ends of aligned open ended sheet metal duct sections which are troughs generally U-shaped in cross-section and have their open sides unobstructed throughout their length and closable by a movable sealing trough cover. The sealing collars and duct sections have telescoping bottom and side wall portions, each of which carries elongated cooperating interengaging rib and groove elements which are aligned and extend normally to the longitudinal axis of the duct sections. Each collar member carries a sealing element extending throughout substantially its entire length which covers and seals the line of juncture of the adjacent ends of trough sections held in rigid aligned relation by the collar member. A closure member carrying sealing elements covers the open area between the ends of the side walls of each collar member and cooperates with the sealing trough covers to complete the seal of the duct in the areas adjacent the joined ends of the duct sections.

Claims20

Dependent claims

A sealed conduit system for electrical conductors including a plurality of duplicate open end sheet metal duct sections, each of said sections having a substantially U-shaped, imperforate trough body member with adjacent open end portions having abutting ends defining a line of juncture therebetween and a movable sealing trough cover, the open side of the U of each of said sections being unobstructed throughout the length of the section, connecting sealing collar members extending into and joining the adjacent end portions of said duct sections, said collar members having at least side and bottom walls, said side walls having free upper ends defining an opening therebetween, cooperative interengaging rib and groove elements carried by said walls of said collar members and the adjacent ends of said duct sections within which the said collar member extends and is disposed entirely, said elements cooperatively securing said duct sections together in rigid, fixed, aligned relation and extending transversely of the longitudinal axis of said sections, those of said elements which are carried by said trough body members defining an imperforate trough therewith an oil impervious seal member carried by each of said collar members and disposed between said side and bottom walls and the adjacent end portions of the said duct sections into which said collar member extends and extending along both sides of and over the entire line of juncture of the adjacent ends of said duct sections and sealing the same, and a cooperative sealing closure member positioned across the opening between the ends of said side wall of each of said collar members and cooperatively sealing off the adjacent ends of the covers of said adjacent duct sections to effectively and cooperatively seal each of the sections throughout their length and to each other.

In a sealed lay-in duct for conduit having end-abutting open end sheet metal duct sections, each of said sections having a substantially U-shaped, imperforate trough body with adjacent open end portions and a movable sealing trough cover, with the open side of the U unobstructed throughout the length of the section,

a. a resiliently deformable connecting sealing collar member joining the adjacent ends of duct section in sealed relation;
b. said connecting sealing collar member being also of sheet metal material and substantially U-shaped and having bight portions and resilient opposed side wall portions carried by said bight portions and flexing inwardly toward each other and relative to said bight portions when urged toward each other and extending in telescoping relation entirely within the adjacent end portions of adjacent trough sections;
c. each of said telescoping trough end portions and bight and side wall collar portions having cooperative interengaging rib and groove elements arranged longitudinally of said collar member, said side wall portions being flexibly deformed inwardly toward each other under compression and said elements cooperatively rigidly securing said trough sections together in fixed aligned relation, those of said elements which are carried by said trough body members defining an imperforate trough therewith;
d. an oil impervious seal member disposed between medial portions of said side wall and bight portions of said collar member, and said telescoping end portions of said sections opposite the abutting ends thereof and covering and sealing the same,
e. and a cooperative oil impervious sealing closure member extending across the opening between the ends of said collar side wall portions and cooperatively sealing off the adjacent ends of the covers of said sections to effectively seal each of the sections throughout their length and to each other.

2 more elements

Dependencies are inferred from the claim text.