Rolling steel door

Details Rolling steel door Rolling steel door

1986-09-15

1988-04-19

Britts, Ramon S.

Flexible or portable closure, partition, or panel

Plural strip, slat, or panel type

Roll type

160315, E06B 914

Patent

active

047382961

ABSTRACT:
An improved rolling steel door of the type having interlocking steel slats, each slat being hinged to the slat above and below it. An improved method of holding the slats in vertical alignment with one another utilizes a pin affixed to the lower end of each slat. The pin has an enlarged head which abuts the edge of the adjacent slat. A spring module is readily removable from the rolling steel door assembly to facilitate the replacement of a broken or inoperative spring.

REFERENCES:
patent: 1408605 (1922-03-01), Kehres
patent: 2307095 (1943-01-01), Zaferakis
patent: 2350287 (1944-05-01), Michelman
patent: 2520618 (1950-08-01), Winter
patent: 2696250 (1954-12-01), Michelman
patent: 3172461 (1965-03-01), Langer
patent: 3640332 (1972-02-01), Luby et al.
patent: 3734161 (1973-05-01), Pierce
patent: 3842892 (1974-10-01), Stieler
patent: 3989084 (1976-11-01), Inamura et al.
patent: 4037639 (1977-07-01), Jones

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