Closure for roof drain

Details Closure for roof drain Closure for roof drain

1975-11-13

1977-07-12

Nozick, Bernard

Liquid purification or separation

Structural installation

Grated inlet surface drain

137362, 251339, E03F 506

Patent

active

040352978

ABSTRACT:
This disclosure relates to a closure device for a roof drain comprising a generally inverted cup-shaped cap having an apex portion and a peripheral skirt terminating in a peripheral edge carrying peripheral sealing means for engaging an area outboard of a roof drain, and a threaded rod passing through the apex portion for rotationally connecting the closure device to a roof drain closure whereby upon rotation of the threaded rod the peripheral sealing means will be brought into contact with a peripheral area outboard of a roof drain to form a seal for retaining a predetermined quantity of water upon a roof for fire prevention purposes.

REFERENCES:
patent: 965999 (1910-08-01), Faget
patent: 1487161 (1924-03-01), Holt
patent: 3884809 (1975-05-01), Logsdon

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