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:
Sep. 03, 1996
Filed:
Mar. 09, 1994
Nicolaas D Brouwer, 3771 KT Barneveld, NL;
Petrus A Besselink, 7534 AT Enschede, NL;
Other;
Abstract
Release mechanism for releasing a door-spring blocked by a blocking device, which mechanism comprises a temperature-sensitive control element for direct thermal actuation, by means of which the mechanism intervenes in the blocking device at a predetermined temperature of that element such that the door-spring is released. The release mechanism comprises for instance a rod guided for movement in longitudinal direction between a first end position and a second end position under a first bias in the direction to this first end position, and a control element comprising an SME material which at the predetermined temperature encloses the rod under a second bias greater than the first and in opposite direction thereto, which rod is coupled to a control member of the blocking device, which control member keeps the blocking device in operation in the first end position of the rod and renders the blocking device inoperative in the second end position of the rod. The release mechanism may further comprise a control circuit.