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:
Jun. 19, 1984
Filed:
Nov. 01, 1982
Applicant:
Inventor:
Jerold R Shaltis, Grand Rapids, MI (US);
Assignee:
Evans Products Company, Portland, OR (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05D / ;
U.S. Cl.
CPC ...
237 / ; 237 / ; 307 / ;
Abstract
The invention relates to an improved auxiliary circulation system for vehicle heaters in which the engine coolant is circulated through the vehicle heater after the engine is shut off. The improved system includes a voltage monitor coupled between the power source and an auxiliary electric pump to monitor the voltage of the power source and prevent the system from being actuated unless the power source voltage exceeds a predetermined level and to open the circuit between the power source and the pump when the power source voltage drops below a predetermined level.