Patent US3645042A successfully refreshed from Google Patents.
US3645042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for opening a swing door
Assignee: CARL SIGERIST AND CIE
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Filing: 1970-05-07
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Granted: 1972-02-29
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Expires: 1990-05-07
Abstract
Abstract Apparatus for opening swing doors comprises a power operated driving unit for opening the wings of the door. A vertical shaft is situated above the outside upper corner of a wing and in the plane of the closed door wings. The shaft axis is displaced outwardly with respect to the pivoting axis of the wings. One end of the shaft has fixed thereto a movement transmission arm engaging the top of the wing and the other end of the shaft carrys a transmission arm which is connected by linkage means to said power operated driving unit. Owing to displacement of said vertical shaft axis outside of the pivoting axis of the door wing, an angular movement of 90* of the door wings requires an angular movement of less than 90* of said power unit operated transmission arm on the vertical shaft.
Inventors
- 👤 Hans Peter Bolli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:38
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/50; E05F15/53
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
182 words
Apparatus for opening a swing door having pivotally mounted door wings, each of the door wings mounted to pivot around a vertical pivotal axis immediately adjacent one vertical side of the door wings and along the plane of the wings, comprising: a rotatably mounted vertical shaft, the axis of rotation of the shaft being situated in the plane of the door wings when the wings are in a closed position and displaced outwardly with respect to the vertical pivotal axis of said door wings, a driver arm fixed to said shaft, means on said wings for engaging said driver arm so that said door wings will pivot about the vertical pivotal axis as said shaft and driver arm rotate, a movement transmission arm fixed to said shaft, said transmission arm extending at right angles to said plane of the door wings when the wings are in closed position, a driving unit, and a movement transmission linkage operatively connecting said movement transmission arm with said driving unit so that said transmission arm rotates said shaft in response to operation of said drive unit.
Claim 2
Dependent Claim
182 words
Apparatus for opening a swing door having pivotally mounted door wings, each of the door wings mounted to pivot around a vertical pivotal axis immediately adjacent one vertical side of the door wings and along the plane of the wings, comprising: a rotatably mounted vertical shaft, the axis of rotation of the shaft being situated in the plane of the door wings when the wings are in a closed position and displaced outwardly with respect to the vertical pivotal axis of said door wings, a driver arm fixed to said shaft, means on said wings for engaging said driver arm so that said door wings will pivot about the vertical pivotal axis as said shaft and driver arm rotate, a movement transmission arm fixed to said shaft, said transmission arm extending at right angles to said plane of the door wings when the wings are in closed position, a driving unit, and a movement transmission linkage operatively connecting said movement transmission arm with said driving unit so that said transmission arm rotates said shaft in response to operation of said drive unit.
Claim 3
Dependent Claim
51 words
Apparatus according to claim 1, in which said driving unit comprises a horizontally disposed cylinder having its axis situated in said plane of the closed door wings, and further comprising spring means mounted in said door wings and coacting with fixed cam surfaces for maintaining the door wings in closed position.
Claim 4
Dependent Claim
25 words
Apparatus according to claim 1, in which said driving unit provides two fixed extreme positions and a fixed middle position for said movement transmission linkage.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |