Replacement roof drain insert coupling

Details Replacement roof drain insert coupling Replacement roof drain insert coupling

1991-06-04

1992-08-25

Hruskoci, Peter

Liquid purification or separation

Structural installation

Grated inlet surface drain

285 42, 285338, 285346, 210232, 210460, B01D 3502

Patent

active

051416336

ABSTRACT:
A drain insert having an insert pipe of smaller diameter than the standing drainpipe into which the insert fits, and an elastomeric, tubular sleeve surrounding and seal-bonded to the outside of one end of the insert pipe so that a portion of the sleeve extends axially beyond that end of the insert pipe. A rigid, conical frustum is provided, the smaller end of which frustum is of lesser diameter than the internal diameter of the sleeve, the larger end of which has a diameter greater than the internal diameter of the sleeve but less than the internal diameter of the drainpipe. Coupled to the frustum and extending axially therefrom are a pair of elongated rods adapted to be inserted axially along the insert pipe. The rods are long enough so that when the frustum is adjacent the sleeve, the other ends of the rods, which are threaded, extend outside of the inlet end of the insert pipe and through holes in a bridge to tabs extending across the pipe inlet end. Nuts are threaded onto the threaded ends of the rods, and when turned will bear against the bridge or tabs so as to draw the frustum against the sleeve and expand the latter radially to effect a seal.

REFERENCES:
patent: 377776 (1888-02-01), Putnam
patent: 993661 (1911-05-01), Dudley
patent: 4035297 (1977-07-01), Aldridge et al.
patent: 4114654 (1978-09-01), Richardson
patent: 4505499 (1985-03-01), Uglow et al.
patent: 4546789 (1985-10-01), Taylor
patent: 4652321 (1987-03-01), Greko
patent: 4799713 (1989-01-01), Uglow

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