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. 29, 2001
Filed:
Apr. 21, 2000
Denso Corporation, Kariya, JP;
Abstract
A warning device for warning change time of a filter for cleaning air includes an indication lamp which indicates a warning of the change time of the filter, and a control unit for controlling operation of the indication lamp. The control unit sets a next timer setting value for the next filter change to a filter-using time until a change of the filter, and operates the indication lamp when the filter-using time passes the next timer setting value after the change of the filter. Thus, the warning of the change time of the filter is performed at a suitable moment reflecting a variation of a clogging degree of the filter. As a result, the warning device accurately performs the warning of the change time of the filer without using a sensor for detecting the clogging degree of the filter.