Movable or removable closures – Plural wings radiate from common pivot; i.e. – revolving – Wings fold for through passage
Patent
1999-05-06
2000-06-20
Redman, Jerry
Movable or removable closures
Plural wings radiate from common pivot; i.e., revolving
Wings fold for through passage
E05D 1502
Patent
active
060763027
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a revolving door provided with a central rotation shaft and with door wings attached to the rotation shaft which door wings can be swivelled aside, and having locking means for locking the door wings in their radial position in relation to the rotation shaft, wherein each door wing is provided with a movable cam which moves when the door wing is swivelled aside and that a locking element is provided, having a movable position and a fixed position, and that the locking element abuts to the cam such that movement of the cam displaces the locking element and that the fixed position of the locking element corresponds at least to the radial position of the door wing.
BACKGROUND OF THE INVENTION
Such a revolving door is known in many kinds of embodiments. The lock used with such revolving doors serves to allow the door wings, after the lock is placed in the unlocked position, to be swivelled aside to provide a spacious escape route. However, during normal use the door wings must be securable in their radial position so that the door can be used as revolving door in its many applications.
U.S. Pat. No. 4,562,665 teaches a magnetic door breakaway system for remote unlocking of doors and apertures. An electromagnet and armature are mounted within a doorframe. Within either the magnet or the armature are depressions and corresponding projections in the other. The document teaches that the armature is preferably movably affixed to the top of the doorframe and by energizing the electromagnet, the projections mate with the depressions make movement of the doorwing impossible. In an emergency situation, the magnet is de-energized and the doorwing may open freely.
From U.S. Pat. No. 4,970,825 a revolving door is known having a plurality of door leaves extending radially outwardly from a center shaft in angularly spaced positions. The door includes upper and lower collapsing mechanisms which are adapted to normally maintain the door leaves in their radial positions, but permit pivotal movement of each door leaf to a collapsed position in the event that the door leaf is subjected to abnormal forces. This document teaches to apply a locking assembly with an electromagnet, which normally is operated to prevent the collapsing mechanism from functioning, so that the door leaves can be collapsed. In the event of an emergency situation, the locking assembly is quickly rendered inoperable by de-energizing the electromagnet, which permits then pivotal movement of the door leaves to their collapsed positions.
SUMMARY OF THE INVENTION
According to the invention, the revolving door is characterized in that the locking element takes the form of a ring abutting against each of the movable cams when all the door wings are in the same position and which ring, in its movable position, can be displaced by each of the cams, and that when the door wings are swivelled aside, the locking element engages the fixed position.
This provides a simple facility by which the door wings can be locked in both their radial and swivelled aside positions in relation to the rotation shaft, and by which the lock can be simply released, in order to be able to adapt to panic situations or other reasons for needing to provide an enlarged passageway or to return to the normal operational radial position of the door wings. Preventing that the swivelled aside doors may assume the radial position again is useful in the case of panic situations.
It is in particular desirable that the locking element between the movable and the fixed position can be remote controlled. In this way it is not necessary to each time move the lock into the desired position at the revolving door itself, but this can then be done, for instance in night situations, from a central security unit. In addition, the arrangement for the remote control of the locking element between the movable position and the fixed position meets the ever increasing safety requirements. This means that the door remains operable, even if in its vicinity a fire
REFERENCES:
patent: 1963881 (1934-06-01), Blanchard
patent: 2111182 (1938-03-01), Hagenbook
patent: 2114405 (1938-04-01), Shields
patent: 2240942 (1941-05-01), Peremi et al.
patent: 3793773 (1974-02-01), Sheckells
patent: 4562665 (1986-01-01), Blackston
patent: 4640046 (1987-02-01), Rushford
patent: 4688350 (1987-08-01), Hattem et al.
patent: 4970825 (1990-11-01), Knarvik
LandOfFree
Releasable locking element for wings of a revolving door does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Releasable locking element for wings of a revolving door, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Releasable locking element for wings of a revolving door will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1841720