Roof drain pressure ring combination

Details Roof drain pressure ring combination Roof drain pressure ring combination

1987-10-19

1988-10-25

Arola, Dave W.

Pipe joints or couplings

With assembly means or feature

With holding means functioning only during transportation...

285 42, 285250, 285321, 52 98, F16L 5512

Patent

active

047798998

ABSTRACT:
A pressure ring combination for sealing the inverted stack of a membrane roof to a waste pipe or other drainage member. The pressure ring combination includes a ring member that is movable between a contracted position and an expanded position, and a keeper member for keeping the ring member in the contracted position until it is desired to expand the ring member. The pressure ring combination can be easily inserted into the interior of the drainage member with a portion of the inverted stack positioned between the pressure ring combination and the interior of the waste pipe or other drainage member while the ring member is in the contracted position. The keeper member can then be removed from the ring member to allow the ring member to expand and to securely seal the portion of the inverted stack to the interior of the waste pipe or other drainage member.

REFERENCES:
patent: 2250286 (1941-07-01), White
patent: 2902298 (1959-09-01), Kolthoff
patent: 3323846 (1967-06-01), Buddy
patent: 3540224 (1970-11-01), Poyonowski
patent: 3958313 (1976-05-01), Rossborough
patent: 4082321 (1978-04-01), Nakajima
patent: 4469467 (1984-09-01), Odill
patent: 4685704 (1987-08-01), Kolar
Buyline 2998, Duro-Lost Roofing, Inc., brochure 07500/Dar.
U-Flow Announces Retro Drain Bulletin No. UF4.

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