Safety device for a raisable curtain door

Details Safety device for a raisable curtain door Safety device for a raisable curtain door

1992-11-03

1993-05-04

Purol, David M.

Flexible or portable closure, partition, or panel

Pleating type

Lazy-tong links pivot about axes parallel to panel

160264, A47H 500

Patent

active

052072568

ABSTRACT:
A goods-handling door of the type comprising a raisable curtain constituted by a flexible curtain having horizontal reinforcing bars disposed at regular intervals, e.g. a roll-up door or a raisable door that folds concertina-like, wherein the lowermost bar is flexible and lighter than the other bars.

REFERENCES:
patent: 1298550 (1919-03-01), Newell
patent: 1482978 (1924-02-01), Edwards
patent: 2687170 (1954-08-01), Johnson
patent: 2746538 (1956-05-01), Johnson et al.
patent: 3577307 (1971-05-01), Baier et al.
patent: 4313485 (1982-02-01), Gidge et al.
patent: 4397347 (1983-08-01), Brabant
patent: 4478268 (1984-10-01), Palmer
patent: 4712598 (1987-12-01), Bonacci et al.
patent: 4934435 (1990-06-01), Regev

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