Rolling shutter
US3989084A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1975 |
| Grant date | Nov 2, 1976 |
| Priority date | — |
| Expiry date | Mar 31, 1995 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/1588
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rolling shutter includes a plurality of elongated slats arranged vertically in a parallel and partially overlapping relationship, each of the slats having pivot pins at both lower side ends thereof which project outwardly so as to be slidably disposed within upstanding guide rails, either in unison with, or with respect to, each other. Individual actuating members extend between each of the pivot pins of the slats and predetermined points of successively disposed slats positioned relative to the pivot pins of the successive slats so as to define moment actuating arms with respect to the pivot pins axes of the successive slats. The actuating members are laterally movable, relative to the pivot axes of the slats, at the predetermined points, and in this manner, the slats may be sequentially pivotally opened or closed when the slats are moved along the guide rails relative to each other by the actuating members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.