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:
May. 09, 1989
Filed:
Oct. 26, 1987
Applicant:
Inventor:
Donald E Hoffman, Java Center, NY (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60H / ; B61D / ;
U.S. Cl.
CPC ...
165 42 ; 165 43 ; 237 / ; 236 13 ; 98-208 ;
Abstract
A motor vehicle air conditioning and heating system having an evaporator and a valve controlled heater core is provided with a cold air bypass around the heater core and upper and lower compartment outlets which outlets and bypass are controlled by a single mode valve to provide a bi-level mode. In one embodiment, the mode valve comprises a singular valve element. In another embodiment, the mode valve comprises two valve elements which are linked together.