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:
Jun. 19, 1979
Filed:
Oct. 22, 1976
Applicant:
Inventor:
Jerry D Burkett, Hopewell Junction, NY (US);
Assignee:
EcoLaire Incorporated, Malvern, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04B / ; F01D / ;
U.S. Cl.
CPC ...
417 18 ; 417 53 ; 415-1 ;
Abstract
A centrifugal fan provided with dampers is driven by a motor having a speed control circuit. Air flow from the centrifugal fan is controlled from a point of maximum air flow to a predetermined crossover speed only by changing the velocity of the fan impeller with subsequent air flow control at air flow rates below said crossover speed being attained only by adjustment of the fan dampers.