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. 20, 1976
Filed:
Oct. 11, 1974
Applicant:
Inventors:
Assignee:
Transelektro Magyar Villamossagi Kulkereskedelmi Vallalat, Budapest, HU;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F28B / ;
U.S. Cl.
CPC ...
165 45 ; 165129 ; 165D / ; 261D / ;
Abstract
The difference in density between heated and unheated air is used to provide flow of air across a heat transfer means located underground. An underground passageway connects an inlet orifice with an outlet orifice for flow of ambient air therethrough. The passageway comprises at least one essentially vertical shaft, said vertical shaft terminating at the outlet orifice and containing proximate its lower end said heat transfer means.