Protective entranceway

Details Protective entranceway Protective entranceway

1981-06-22

1984-10-23

Downey, Kenneth

Movable or removable closures

Convertible

49 68, 49 70, 135 93, 135 95, 296162, E06B 700

Patent

active

044780010

ABSTRACT:
The present invention relates to a protective entranceway contained in the outer door of a van, trailer or other shelter means. In one mode our device takes the form of a door operable about a vertical hinge line, and although thicker than an ordinary door, it serves in the manner of an ordinary door to provide closure for the shelter means at such time as no contamination is present. A platform is contained on the outer portion of our door, which is enabled to swing downwardly at the time of a contamination alert. A canopy that had been contained in the door in a folded condition is caused by downward movement of the platform to deploy and form a closed entranceway serving in a second mode of use to prevent contaminated air from entering the shelter means.

REFERENCES:
patent: 1675953 (1928-07-01), Nichol
patent: 2483478 (1949-10-01), Smelker
patent: 3766844 (1973-10-01), Donnelly et al.

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