Contamination reducing airlock and entry system

Details Contamination reducing airlock and entry system Contamination reducing airlock and entry system

1984-03-14

1986-04-15

Joyce, Harold

49 41, 52 2, 98 31, 98 331, F24F 700

Patent

active

045819866

ABSTRACT:
An airlock (purge chamber) which functions as an intermediate area between a contaminated area and a clean area where contaminated air may be purged before a person enters the clean area. The airlock (10) is a double-walled circular structure having an outside wall (20) with a single air intake (31) at its top and multiple air discharge ducts (37) spaced around the full 360 degree circumference of its base. The airlock (10) has an inner wall (24) with multiple air intake openings (perforations) (38) across its inner ceiling (26) and around its sides (24), providing a primary purge air flow (34) into the ceiling (26) of the inner wall (24) and down through the airlock (10) and a secondary air flow (32) into the side air intake openings (perforations) (38) and down through the airlock (10). Outgoing purge air (36) flows down through the floor (28) of the inner wall (24) and out the discharge ducts (37) at the base (27) of the outer wall (20) of the airlock (10).

REFERENCES:
patent: 1621356 (1927-03-01), Dickey
patent: 2360343 (1944-10-01), Hill
patent: 3097587 (1963-07-01), Kurek
patent: 3294480 (1966-12-01), Potapehko
patent: 3302547 (1967-02-01), Wasserman
patent: 3363532 (1968-01-01), Horneff
patent: 3367257 (1968-02-01), Raider et al.
patent: 3687053 (1972-08-01), Henson et al.
patent: 3766844 (1973-10-01), Donnelly et al.
patent: 3875927 (1975-04-01), Trexler

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