Silencer for fume extracting hoods

Details Silencer for fume extracting hoods Silencer for fume extracting hoods

2004-04-05

2008-03-25

Boles, Derek S. (Department: 3749)

Ventilation

Workstation ventilator

Covered workbench chamber

C454S049000, C454S063000

Reexamination Certificate

active

07347773

ABSTRACT:
The silencer for fume extracting hoods is comprised of a panel (1) consisting of a lower tray (4), an insulating intermediary sheet (5), and an upper or porous filling foamed material (6) acting as a sound absorbing and limiting or damping material. The panel is hinged to the fume extracting hood (7) by articulation means (2).

REFERENCES:
patent: 2176319 (1939-10-01), Anderson
patent: 3455378 (1969-07-01), Honnold, Jr.
patent: 3978919 (1976-09-01), Fachbach et al.
patent: 5196040 (1993-03-01), Malloy et al.
patent: 5299634 (1994-04-01), Toyoda et al.
patent: 5512073 (1996-04-01), Mirza et al.
patent: 6428408 (2002-08-01), Bell et al.

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