Flexible or portable closure – partition – or panel – Plural strip – slat – or panel type – Roll type
Patent
1994-03-02
1995-07-25
Purol, David M.
Flexible or portable closure, partition, or panel
Plural strip, slat, or panel type
Roll type
160174, E06B 908
Patent
active
054353718
ABSTRACT:
An iron rolling door including a rolling door board structure and guide rails. The rolling door board structure is composed of multiple support rods, metal plates, connecting plates and stopper plates. Two ends of each metal plate is wound to define two circular holes through which the support rods extend. Each two adjacent metal plates are pivotally connected by the connecting plate, whereby the metal plates are able to rotate through a certain angle into an opened Or closed state. The stopper plates are fitted with the support rods for preventing the metal plates from slipping away from the support rods. Each guide rail has a guiding wall defining a guiding groove for receiving a slide plate. Two link members are disposed between the slide plate and the guiding wall and an extension spring is disposed between the link member and guiding wall. The slide plate, link member and guiding wall together form a four-link structure, whereby the rolling door board structure is slidably disposed in the guiding grooves of the guide rails to be restricted by the slide plates, and the rolling door board structure is able to rotate through a certain angle into an opened or closed state.
REFERENCES:
patent: 1756496 (1930-04-01), Warnick
patent: 2645282 (1953-07-01), Grau
patent: 2812021 (1957-11-01), Bechtler
patent: 3027937 (1962-04-01), Wilson
patent: 3237682 (1966-03-01), Davis
patent: 3331158 (1967-07-01), Frakes
patent: 4715421 (1987-12-01), Erber
patent: 5188161 (1993-02-01), Erber
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