Door structure

Details Door structure Door structure

1983-04-01

1984-10-23

Caun, Peter M.

Flexible or portable closure, partition, or panel

Roll type

With rotating means

160272, E06B 920

Patent

active

044782683

ABSTRACT:
A door for closing vehicular traffic passages is provided in which the door is a curtain fabricated from a hard flexible material. The curtain runs in opposing channels, is mounted on a counterbalanced wind-up drum and under impact changes weight, moves out of the channels and is wound up to open the vehicular passage.

REFERENCES:
patent: 537642 (1895-04-01), Johnston
patent: 608436 (1898-08-01), Bowman
patent: 608506 (1898-08-01), Bowman
patent: 2641031 (1953-06-01), Ehnet
patent: 2839135 (1958-06-01), Anderson
patent: 3331425 (1967-07-01), Graves
patent: 3460602 (1969-08-01), Hugus
patent: 3690602 (1972-09-01), Johnson
patent: 3848653 (1972-11-01), Youngs
patent: 3878879 (1975-04-01), Manns
patent: 4126174 (1978-11-01), Manianetz et al.

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