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US 4,065,896 AGranted
Bottomless trench duct
AssigneeBargar Metal Fabricating Company
InventorJohn P. Penczak
Life of this patent
Estimating the term…
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AssigneeBargar Metal Fabricating Company
InventorJohn P. Penczak
Estimating the term…
An underfloor electrical distribution system is comprised of a bottomless trench duct transversely overlying a cellular subfloor deck assembly. The bottomless trench duct has spaced-apart, parallel L-shaped side rails, the vertical legs of which terminate in an inverted U-shaped channel and form the sidewalls of the trench. Preshaped void closure plates, which are attached to the side rails, transversely extend into the troughs of the cellular subfloor deck assembly to prevent the ingress of concrete into the trench duct while the concrete floor is being constructed. The preshaped void closure plates may be held in place within the inverted U-shaped channel by means of rivets fastened to the vertical leg of the side rail. Alternatively, horizontal slots in the inverted U-shaped channel may be cut to receive the void closure plates, which are frictionally held within the U-shaped channel.
In an underfloor electrical distribution system, including a cellular subfloor duct assembly having crests and troughs defining raceway cells, a bottomless trench duct comprising a cover and spaced supporting side rail means fixed to said crests and running generally perpendicular thereto said cover being attached to said supporting side rail means, and individually replaceable void closure means depending from said supporting side rails into said troughs, whereby a closure means may be chosen to conform to the configuration of a particular trough and a series of closure means may conform to the spacing between troughs.
A bottomless trench duct comprising a cover and supporting side rail means adapted to be affixed to a cellular subfloor duct assembly said cover being attached to said supporting side rail means, said subfloor duct assembly having crests and troughs running generally perpendicularly to said duct, a plurality of individually replaceable void closure means depending from said side rail means, said void closure means having a periphery shaped to conform to the configuration of a particular trough.
Dependencies are inferred from the claim text.