Movable or removable closures – Plural wings radiate from common pivot; i.e. – revolving
Patent
1998-08-18
2000-05-16
Redman, Jerry
Movable or removable closures
Plural wings radiate from common pivot; i.e., revolving
E05D 1502
Patent
active
060619600
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates generally to a revolving door assembly.
BACKGROUND OF THE INVENTION
The revolving door is generally located at an entrance of building structures to prevent the direct flow of air through a passage space when a user passes through the entrance. The revolving door is also used as a security door which restricts access into a room to authorized personnel.
Referring now to FIG. 1, there is shown a perspective view of a conventional revolving door assembly. The conventional revolving door assembly comprises a cylindrical vestibule including opposed curved side walls defining a passage space and passage openings, a central axis, and a plurality of door wings extending outwardly from the central axis. The door wings are partially enclosed between the opposed curved side walls and revolve together about the common central axis within the passage space.
According to the conventional revolving door assembly having the cylindrical vestibule, since the side walls are comprised of curved or arcuate members, the conventional revolving door assembly has several disadvantages. For example, the curved or arcuate wall is relatively difficult to manufacture so that materials to be used for the side walls are limited because of technical and/or economical reasons. According to the conventional revolving door assembly, the two spaced cylindrical walls are disposed to partially enclose the cylindrical passage space to define two diametrically opposed passage openings which are relatively narrow. To widen the width of the passage opening, larger side walls and larger door wings should be used and the revolving door assembly becomes bulky. Otherwise, the number of door wings should be increased to correspond with a wider passage opening but a compartment defined by adjacent door wings becomes too small. In addition, because of the cylindrical configuration, it is difficult to mount a shutter assembly which is used for a robbery prevention purpose at the revolving door assembly.
An object of the present invention is to provide a revolving door in which the opposed curved side walls are replaced by opposed vertical side walls having opposed substantially flat or plane surfaces.
BRIEF DESCRIPTION OF THE INVENTION
According to the present invention, there is provided a revolving door having opposed vertical side walls defining a passage space and opposed passage openings, and a door assembly comprising a vertical central axis and a plurality of door wings extending outwardly from the central axis in which the side walls comprise opposed substantially flat surfaces, and the door assembly eccentrically revolves within the passage space such that an outer extremity of at least one door wing is always in close sealing proximity with each of said opposed surfaces. Preferably, the side walls are comprised of opposed vertical substantially flat members.
The door assembly which eccentrically revolves within the passage space enables to replace the curved side walls by the side walls having the opposed substantially flat or plane surfaces.
With the side walls having the opposed substantially flat surfaces, wider passage openings can be obtained. Since the side walls can be comprised of flat members which is simple to manufacture, a range of selection of materials to be used for the side wall is broaden. Since the passage openings define a vertical plane, the shutter assembly can easily be mounted at the revolving door assembly.
Other advantages of adopting flat side walls will be readily apparent from the drawings, discussion and description which follow.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of a conventional revolving door assembly;
FIG. 2 is a perspective view of a revolving door in accord with the present invention in which means for revolving a door assembly is not shown;
FIG. 3 is a plan view of the revolving door according to FIG. 2;
FIG. 4 is a plan view of another embodiment of the revolving door;
FIG. 5 is a plan view of a revolving door assembly of ano
REFERENCES:
patent: 596029 (1897-12-01), Ife
patent: 1007025 (1911-10-01), Ely
patent: 1417372 (1922-05-01), Friedland
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