Gas-permeable, liquid-impermeable vent cover

Details Gas-permeable, liquid-impermeable vent cover Gas-permeable, liquid-impermeable vent cover

1994-11-17

1996-06-04

Joyce, Harold

Ventilation

Having inlet airway

Sleeved vent for ceiling, wall, or floor

96 6, 454274, B01D 1900

Patent

active

055227694

ABSTRACT:
A flexible, insertable vent cover is formed from a flexible, resilient material. The cover has a through passageway; a gas-permeable, liquid-impermeable membrane traversing the passageway; a diaphragm valve covering the membrane; and an annular securing ring that maintains the valve in a protective position with respect to the membrane in order to protect the membrane from immersion in or impingement by liquid.

REFERENCES:
patent: 3159090 (1964-12-01), Schutt
patent: 4237526 (1980-12-01), Wood
patent: 4238207 (1980-12-01), Ruschke
patent: 4825905 (1989-05-01), Whitley, II
patent: 4921124 (1990-05-01), Stammler et al.
patent: 4974745 (1990-12-01), Jocham
patent: 5080001 (1992-01-01), Ishibashi et al.
patent: 5125428 (1992-06-01), Rauter
patent: 5215312 (1993-06-01), Knappe et al.
patent: 5348570 (1994-09-01), Ruppert, Jr. et al.
Patent Abstract of Japan--vol. 10, No. 273, M-518, abstract of JP, A, 61-96274 (Sumitomo Electric Ind., Ltd.) 14 May 1986 (14.May.1986).

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