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:
Aug. 09, 1983
Filed:
Oct. 23, 1981
Applicant:
Inventor:
Dale E Maxson, Rockford, IL (US);
Assignee:
Barber-Colman Company, Rockford, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F24F / ; F16K / ;
U.S. Cl.
CPC ...
98 4 / ; 98-1 ; 98 4 / ; 137 75 ;
Abstract
A reciprocating pneumatic actuator moves the damper of an air diffuser between open and closed positions and is automatically vented to atmosphere if fire or high heat occurs in the vicinity of the diffuser. When the actuator is vented, the return spring of the actuator snaps the damper to its closed position. A heat responsive latch automatically holds the damper in its closed position and prevents the damper from dropping open in the event the return spring is weakened by heat.