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:
Apr. 06, 1993
Filed:
Nov. 26, 1990
Paul J Steffes, Dickinson, ND (US);
Other;
Abstract
A double loop heat storage space heating furnace has a housing with an upper heat storage section containing an electrically heated heat storage brick portion and a lower section containing an air-to-air heat exchanger having first and second air flow passages. The furnace has two separate flow courses. The first flow course uses a room air fan to circulate room air through the first passages of the heat exchanger. The second flow course has a recirculating fan in the lower housing section for recirculating air in a continuous closed loop through the heat storage brick portion to be heated and the second flow passages of the heat exchanger so that heat is delivered from the heated recirculated air and the room air in the heat exchanger. The upper housing section includes a cooling air space surrounding the heat storage brick portion through which the room air fan circulates a portion of the room air to maintain the furnace housing at a temperature similar to that of the room air.