Vandal-resistant and tamper-proof plenum or vacuum chamber security air flow adjustment device
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United States of America Patent
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-
Mar 19, 1985
Grant Date -
N/A
app pub date -
Jan 5, 1983
filing date -
Jan 5, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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