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. 01, 1980
Filed:
Jun. 29, 1978
Applicant:
Inventor:
Robert F Vary, Round Lake, IL (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F24H / ; F28F / ;
U.S. Cl.
CPC ...
165 98 ; 165 54 ;
Abstract
A uni-directional valve arrangement placed in a predetermined location between a habitable enclosure and a heating or cooling system which is exposed to outdoor temperatures prevents air of undesirable temperature in the system from passing into the enclosure by gravity flow.