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:
Jul. 26, 1983
Filed:
Dec. 16, 1981
Applicant:
Inventor:
Gilbert H Avery, Memphis, TN (US);
Assignee:
Barber-Colman Company, Rockford, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
G05D / ;
U.S. Cl.
CPC ...
137 82 ; 137486 ; 236 49 ;
Abstract
A controller for a damper maintains a substantially constant volumetric rate of flow of air through a duct into a controlled space for a given condition in the space and resets the rate of flow to three different levels as a function of three different conditions in the space. Two pneumatic actuators respond to the four conditions in the space and produce forces which vary with the conditions. A floating lever receives the forces and causes the controller to set the air flow as a function of the sum of the weighted values of the forces produced by the two actuators.