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. 10, 1984
Filed:
Nov. 19, 1981
Applicant:
Inventors:
Assignee:
Nippon Soken, Inc., Nishio, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60L / ; F24H / ; F28F / ; H05B / ;
U.S. Cl.
CPC ...
219367 ; 165 96 ; 165103 ; 219202 ; 219374 ; 219505 ;
Abstract
An air heating apparatus comprises a auxillary PTC heating element in an air duct lying parallel to the length of the duct to define first and second air passages separated by the heating element. The PTC heating element has apertures through which passes air to be heated; the two air passages thereby communicating with each other by means of the apertures through the heating element. First and second valves are located at upstream and downstream ends of the first and second air passages for selectably closing and opening the upstream and downstream ends of the first and second air passages, respectively.