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:
Dec. 08, 2009
Filed:
Mar. 29, 2007
Yasuhiro Ohtsu, Kanagawa, JP;
Masatoshi Tanaka, Kanagawa, JP;
Yuji Otsuka, Kanagawa, JP;
Yukio Machida, Kanagawa, JP;
Mitsuru Watanabe, Kanagawa, JP;
Yasuhiro Ohtsu, Kanagawa, JP;
Masatoshi Tanaka, Kanagawa, JP;
Yuji Otsuka, Kanagawa, JP;
Yukio Machida, Kanagawa, JP;
Mitsuru Watanabe, Kanagawa, JP;
Toshiba Tec Kabushiki Kaisha, Tokyo, JP;
Abstract
An electric vacuum cleaner includes a first dust separation device configured to separate sucked dust, a first dust collection section for collecting the separated dust, a second dust separation device configured to separate the dust, a dust removing device configured to remove the dust adhering to the second dust separation device, a second dust collection section for accumulating the removed dust, a partition wall for zoning the first dust collection section and the second dust collection section and an introduction opening for introducing the removed dust into the second dust collection section; the partition wall includes a communication opening for communicating the first dust collection section to the second dust collection section and an opening and closing member for closing either of the introduction opening or the communication opening and switching the closing to the other by rotating, and the opening and closing member closes the introduction opening with a negative pressure by an electric fan and closes the communication opening by its own weight when the electric fan is not driven.