Patent US4255900A successfully refreshed from Google Patents.
US4255900A
Expired / Lapsed
US
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Safety device for opening of revolving doors
Assignee: ELETTROMECCANICA MAUSOLI Srl
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Filing: 1979-03-05
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Granted: 1981-03-17
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Expires: 1999-03-05
Abstract
Abstract A safety apparatus is associated with otherwise conventional revolving doors which are rotatable about a vertical axis. A pair of closure components are positioned adjacent to the respective sides of a revolving door and are displaceable in the horizontal direction. The closure components include profiled surfaces which delimit access space of the revolving door. In case of emergency situations, e.g. caused by a fire, the closure components are moved away from one another under the power of two respective jacks, leaving access space around the sides of the door wide enough for the passage of persons.
Inventors
- 👤 Carla Magnani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:18
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/90; E05; E05F; E05F15/00; E05F15/70; E05F15/72; E05F15/50; E05F15/56; E05Y; E05Y2201/00; E05Y2201/40; E05Y2201/404; E05Y2201/422; E05Y2201/43; E05Y2201/448; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
118 words
A safety device for a revolving door positioned in an access space for rotation about a given vertical axis, the device comprising at least one horizontally moveable vertical closure component positioned adjacent said revolving door, said closure component having a vertical profiled surface which defines a horizontal extent of said access space; drive means coupled to said vertical closure component for selectively displacing said closure component linearly in a horizontal direction from a position in which said profiled surface is immediately adjacent said revolving door to a position in which a gap defining a passageway is provided between said profiled surface and said revolving door; and command control means coupled to said drive means for energizing same selectively.
Claim 2
Dependent Claim
118 words
A safety device for a revolving door positioned in an access space for rotation about a given vertical axis, the device comprising at least one horizontally moveable vertical closure component positioned adjacent said revolving door, said closure component having a vertical profiled surface which defines a horizontal extent of said access space; drive means coupled to said vertical closure component for selectively displacing said closure component linearly in a horizontal direction from a position in which said profiled surface is immediately adjacent said revolving door to a position in which a gap defining a passageway is provided between said profiled surface and said revolving door; and command control means coupled to said drive means for energizing same selectively.
Claim 3
Dependent Claim
118 words
A safety device according to claim 1, including an additional horizontally moveable vertical closure component positioned adjacent said revolving door opposite said at least one closure component, said additional closure component having an additional vertical profiled surface which defines an additional horizontal extent of said access space; additional drive means coupled to said additional vertical closure component for selectively displacing said additional closure component linearly in a horizontal direction from a position in which said additional vertical profiled surface is immediately adjacent said revolving door to a position in which a gap defining an additional passageway is provided between said additional profiled surface and said revolving door to allow additional free flow of persons past said revolving door.
Claim 4
Dependent Claim
23 words
A safety device according to claim 2, wherein said command control means is coupled to said additional drive means for energizing same selectively.
Claim 5
Dependent Claim
30 words
A safety device according to claim 2, wherein said drive means and said additional drive means comprises respective hydraulic operating cylinders supplied with fluid under control of a pneumatic accumulator.
Claim 6
Dependent Claim
27 words
A safety device according to claim 1, wherein said drive means comprises at least one hydraulic operating cylinder supplied with fluid under control of a pneumatic accumulator.
Claim 7
Dependent Claim
25 words
A safety device according to claim 1 or claim 2, wherein said command control means comprises at least one sensor responsive to an environmental condition.
Claim 8
Dependent Claim
19 words
A safety device according to claim 6, wherein said at least one sensor comprises at least one temperature sensor.
Claim 9
Dependent Claim
19 words
A safety device according to claim 6, wherein said at least one sensor comprises at least one smoke sensor.
Claim 10
Dependent Claim
19 words
A safety device according to claim 6, wherein said at least one sensor comprises at least one gas sensor.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |