Trench duct connecting device with vertical adjustment means

Claim 1

A unitary connecting device for use in installing trenchduct on cellular, concrete and blended floors, the device being made from metal and being formed so as to have: a pair of flat, rectangular-shaped, spaced-apart mounting plates to be disposed on the top of cells of cellular floor and welded thereto or alternatively to be disposed over the surface of a concrete floor and leveled with respect thereto, each plate having an inner edge, an outer edge and a side edge extending therebetween with the inner edges facing one another; a pair of welding flanges respectively connected to said side edges and extending normally upwardly from said mounting plates, the flanges being for use in welding the device to the side of a trench; a bridge connected to said inner edges and extending over the space between the plates with the top of the bridge being spaced above said mounting plates, the top having an aperture for use in retaining a nut to accept a leveling screw for use when the device is over a concrete floor; and a pair of coupling flanges respectively connected to said outer edges and extending normally, upwardly, from said mounting plates, each coupling flange having aperture means for accepting coupling bolts when the device is used for coupling adjacent trenches together;