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:
Mar. 19, 1991
Filed:
Feb. 22, 1990
Applicant:
Inventors:
Charles V Mueller, Iowa City, IA (US);
Ross L Bisplinghoff, Norfolk, MA (US);
Christopher Ferguson, Framingham, MA (US);
Assignee:
Raytheon Company, Lexington, MA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B01F / ;
U.S. Cl.
CPC ...
236 / ; 98 4204 ; 165 16 ; 236 493 ;
Abstract
A window fan with an electronic controller having an AUTO mode of operation that is responsive to the .DELTA.T between inside and outside temperature, a minimum inside temperature threshold, and the outside relative humidity. Accordingly, if it is relatively hot or humid outside, or if it is relatively cold inside, the window fan is inactive. Thus, the fan is automatically activated only during those time periods when it is most advantageous to ventilate with outside fresh air.