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:
Feb. 27, 1996
Filed:
Feb. 01, 1994
George S Polan, Perkiomenville, PA (US);
Central Sprinkler Corporation, Lansdale, PA (US);
Abstract
An automatic sprinkler includes a sprinkler body having a fluid passage outlet. A valve plug is maintained in sealing engagement with the fluid passage outlet by one or more control levers which react against the sprinkler body. Each control lever is held in position by a temperature-responsive actuator made from a generally C-shaped band of shape-memory alloy. The control band may be rigidly secured to one of the control levers. Upon an occurrence of a high-temperature condition, opposed ends of the control band spread apart in a common plane, releasing all control levers thereby permitting all control levers to pivot relative to the sprinkler body and release the valve plug from sealing engagement with the fluid passage outlet.