Vandal-resistant and tamper-proof plenum or vacuum chamber secur

Details Vandal-resistant and tamper-proof plenum or vacuum chamber secur Vandal-resistant and tamper-proof plenum or vacuum chamber secur

1983-01-05

1985-03-19

Wayner, William E.

98108, 98 413, F24F 700

Patent

active

045051895

ABSTRACT:
A vandal-resistant and tamper-proof plenum or vacuum chamber security air flow adjustment device installed inside the cabinet of a plumbing fixture. The device has a grille formed in the wall of the cabinet with many spaced openings therein and one surface of the grille is accessible from within a cell or other room and the back surface is inaccessible therefrom. A damper member is slidingly mounted against the inaccessible surface and is adjustable to control the amount of air flowing through the grille. The damper member has many openings which are spaced apart the same distance as the openings in the grille and the damper member is inaccessible from the cell but accessible from a pipe chase positioned on the other side of the cell wall.

REFERENCES:
patent: 2792771 (1957-05-01), Burwen
patent: 3124903 (1964-03-01), Truhan
patent: 4426918 (1984-01-01), Lambert

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