Movable or removable closures – Plural wings radiate from common pivot; i.e. – revolving
Patent
1995-05-11
1998-01-27
Redman, Jerry
Movable or removable closures
Plural wings radiate from common pivot; i.e., revolving
49 44, E05D 1502
Patent
active
057111111
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention:
The present invention relates to a revolving door lock having outer walls laterally defining a passage space.
2. Description of the Prior Art:
In the present times of energy saving it is important to seal off entrances of buildings as good as possible so that no heating power disappears from the building. The inner space of the building should also be kept free of draught, which is particularly important in restaurants or hotels, shops and main entrances of commercial properties, hospitals and the like. Until now, this object has been obtained by so-called revolving cross doors, in which three or four door wings define three or four cylinder segments having an angle at the center of 120.degree. or 90.degree. respectively. With these revolving cross doors, in particular with the four winged revolving door, the passage space is very narrow so that it is for example not possible to enter the building entrance with a trolley or a wheel chair, and the passage with suitcases is difficult. A further disadvantage of these prior art doors is that all persons passing through the revolving cross doors should go equally fast so that old or handicapped people could become pinched due to a faster person which is also in the area of the revolving cross door, or due to a motorized revolving cross door being driven too fast. Motorized revolving cross doors having a lower rotational speed have a reduced capacity, however, and prevent a quick passage through the revolving door lock.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a revolving door lock which does not have said disadvantages of the prior art revolving cross doors.
For obtaining said object, the revolving door lock according to the invention is characterized by at least two revolving doors moving relatively synchronized and having two wings rotatable about respective vertical rotating axes, said wings of the different revolving doors have such relative angular position that the passage space is always closed at least on one side.
The revolving door lock according to the invention effects that, as a result, in each position of the revolving doors the inner space of the building is sealed to the outside so that no heat energy is lost for nothing and hardly no draught appears. On the other hand, there is no need for three or four wings at the individual revolving doors so that with each revolving door more space is available for the passage with trolleys, wheel chairs, luggage and the like. Furthermore, the revolving door lock can be passed quickly, in that at each revolving door a free passage is possible since only one of the doors should effect a seal at a time, while the other one can be fully open. As a result, several persons may pass through the revolving door lock in their own speed without interfering with each other.
A maximum passage space at the revolving doors is created if each revolving door comprises two aligned wings on both sides of the respective rotating axis. Then, a proper seal through the revolving door lock is always effected when two revolving doors are provided of which the angles to their own line symmetry in longitudinal direction have a relative angular off-set of 90.degree..
A favorable embodiment of the revolving door lock according to the invention is characterized in that the rotating axes of the revolving doors are positioned at a distance which is greater than the sum of the radius of both revolving doors, and preferably greater than 2.25 times the radius.
Due to this feature it is possible to create an intermediate space between the revolving doors offering persons passing through the revolving door lock the opportunity to stop between the revolving doors. This is of great importance to the safety as people could panic at the transfer between the revolving doors because they do not know how to walk and could then be hit by the door wings. According to the invention the people are able to reorientate in the intermediate space and only then conti
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Official Gazette, Jun. 25, 1901, p. 2656, U.S. Patent 677,294 -to Theophilus Van Kannel, "Revolving Door".
Huber Erik Jan
Huber Jacob Robert Alfred
Nyffenegger Jurg
Boon Edam E.V.
Redman Jerry
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