Flexible or portable closure – partition – or panel – Plural strip – slat – or panel type – Roll type
Patent
1994-06-01
1995-12-19
Johnson, Blair M.
Flexible or portable closure, partition, or panel
Plural strip, slat, or panel type
Roll type
160201, 160DIG15, E06B 908
Patent
active
054761301
ABSTRACT:
An improved steel rolling door is equipped with a a number of pivot plates which are engaged with each other side by side and pivotally associated with one side of the topmost collapsible door plate, and a plurality of pulling wires which are engaged with the opposite side thereof so as to permit the collapsible door plates to be adjusted from a horizontal position to a vertical position, i.e., from an opening position to a closing position, or vice versa. Moreover, the door plates are consecutively connected to each other one by one by way of a plurality of linking pieces and length variable linkage assembly units each including a pair of pivot parts and a connector so that the door plates can be easily and smoothly collapsed and rolled up along a rolling shaft without getting stuck in operation.
REFERENCES:
patent: 2723715 (1955-11-01), Kauffmann
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