Movable or removable closures – Plural wings radiate from common pivot; i.e. – revolving – Wings fold for through passage
Patent
1990-03-14
1990-11-20
Kannan, Philip C.
Movable or removable closures
Plural wings radiate from common pivot; i.e., revolving
Wings fold for through passage
E05D 1502
Patent
active
049708252
ABSTRACT:
A revolving door including a plurality of door leaves extending radially outwardly from a center shaft in angularly spaced positions. The door leaves are mounted in a door opening for rotation about said center shaft by upper and lower bearing means. The door also includes upper and lower collapsing mechanisms which are adapted to normally maintain the door leaves in their radial positions, but to permit pivotal movement of each door leaf about the center shaft between its normal radial position and a collapsed position in the event that the door leaf is subjected to abnormal forces. One of the upper and/or lower collapsing mechanisms has associated with it a locking assembly having 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 easily and quickly rendered inoperable simply by de-energizing the electromagnet which, in turn, permits pivotal movement of the door leaves to their collapsed positions.
REFERENCES:
patent: 1134325 (1915-04-01), Flint
patent: 1278145 (1918-09-01), Haviland
patent: 1952393 (1934-03-01), Tigue
patent: 1963881 (1934-06-01), Blanchard
patent: 4627193 (1986-12-01), Schwarz
patent: 4796542 (1989-01-01), Lee
Crane Fulview Door Company
Kannan Philip C.
Knechtel Robert E.
Milano Michael J.
LandOfFree
Collapsing mechanism for revolving doors does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Collapsing mechanism for revolving doors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Collapsing mechanism for revolving doors will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-446455