The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 23, 1993
Filed:
Oct. 28, 1992
Wayne G Marlatt, North Brunswick, NJ (US);
Wojciech K Cader, Edison, NJ (US);
Atlas Roll-Lite Door Corp., Orlando, FL (US);
Abstract
A fire door release mechanism includes a pair of levers engaging a bearing disc to hold a toothed clutch in engagement between a shaft of the fire door and a shaft of its operator. One of the levers has, at its end remote from the bearing disc, a pin on which a holding block is pivotally mounted. The other lever also has a pin at its remote end which is retained within a pocket on the holding block so long as tension is applied to the block, which tension is normally provided by a fuse link chain. When the tension is released, the levers, which are lightly spring biased, pivot out of engagement with the bearing disc to allow the clutch to disengage and separate the operator shaft from the fire door shaft.