Patent US3989084A successfully refreshed from Google Patents.
US3989084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rolling shutter
Assignee: Bunka Shutter Co Ltd
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Filing: 1975-03-31
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Granted: 1976-11-02
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Expires: 1995-03-31
Abstract
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.
Inventors
- 👤 Kosuke Inamura
- 👤 Ikira Takasaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:52
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/24; E06B9/26; E06B9/28; E06B9/34; E06B9/02; E06B9/08; E06B9/11; E06B9/15; E06B2009/1533; E06B2009/1572; E06B2009/1577; E06B2009/1588
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
169 words
A rolling shutter comprising: a shutter case; at least two upstanding guide rails; a door slidable along said guide rails, said door including a plurality of elongated slats arranged vertically in a parallel and partially overlapping relationship, each of said slats having pivot pins at both lower side ends thereof projecting outwardly so as to be slidably disposed within said guide rails in unison with, and also with respect to, each other; and individual actuating means extending between each one of said pivot pins of each one of said slats and predetermined points on successively disposed slats positioned relative to the pivot pins of said successive slats so as to define moment actuating arms with respect to the pivot pin axes of said successive seats, said actuating means being laterally movable, relative to the pivot axes of said slats, said predetermined points, whereby each of said slats may be sequentially pivotally moved when said slats are moved along said guide rails relative to each other by said actuating means.
Claim 2
Dependent Claim
169 words
A rolling shutter comprising: a shutter case; at least two upstanding guide rails; a door slidable along said guide rails, said door including a plurality of elongated slats arranged vertically in a parallel and partially overlapping relationship, each of said slats having pivot pins at both lower side ends thereof projecting outwardly so as to be slidably disposed within said guide rails in unison with, and also with respect to, each other; and individual actuating means extending between each one of said pivot pins of each one of said slats and predetermined points on successively disposed slats positioned relative to the pivot pins of said successive slats so as to define moment actuating arms with respect to the pivot pin axes of said successive seats, said actuating means being laterally movable, relative to the pivot axes of said slats, said predetermined points, whereby each of said slats may be sequentially pivotally moved when said slats are moved along said guide rails relative to each other by said actuating means.
Claim 3
Dependent Claim
30 words
A rolling shutter according to claim 1, wherein each of said slats includes a curved inner surface at the upper longitudinal side thereof to which a damper strip is affixed.
Claim 4
Dependent Claim
32 words
A rolling shutter according to claim 1, wherein each of said slats includes hook shaped lower longitudinal edges having openings at both side ends thereof in which said pivot pins are disposed.
Claim 5
Dependent Claim
15 words
A rolling shutter as set forth in claim 1, wherein: said actuating means comprise links.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |