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. 22, 2012
Filed:
Jun. 29, 2009
Applicants:
Mu Seon Woo, Seoul, KR;
Byoung Phil Lee, Seoul, KR;
Hyung Gon Kim, Seoul, KR;
Inventors:
Assignee:
Woongjin Coway Co., Ltd., Choongcheongnam-Do, KR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D 46/30 (2006.01); B01D 49/00 (2006.01); G05B 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A system and a method are disclosed for changing a filter provided in an air purifier at an optimum time by measuring the rotational speed of a motor that operates the filter. The system for determining an air purifier filter change time includes: a motor speed measurement unit; a time counting unit; a speed determination unit; a time comparison unit; and a filter change time determination unit.