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:
Nov. 29, 2005
Filed:
Mar. 22, 2002
Ikuo Takeuchi, Chiyoda, JP;
Yutaka Arai, Chiyoda, JP;
Yasuhiro Nemoto, Ogawa, JP;
Atsushi Koseki, Toride, JP;
Taiji Tajima, Tsukuba, JP;
Ikuo Takeuchi, Chiyoda, JP;
Yutaka Arai, Chiyoda, JP;
Yasuhiro Nemoto, Ogawa, JP;
Atsushi Koseki, Toride, JP;
Taiji Tajima, Tsukuba, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A self-running vacuum cleaner comprises a homing mode of following a back of a user with receiving a signal from a light emitting means or a transmitting means of a position indicator means held by the user, an instruction operation mode, in which the user instructs a cleaning area to the self-running vacuum cleaner, and an execution mode for cleaning up the cleaning area instructed. When the self-running vacuum cleaner operates under the homing mode or the instruction mode, a signal from the light-emitting means or the transmitting means is received by a receiver means attached on a periphery portion of a measuring means, which is provided in an upper portion of the vacuum cleaner. Comparing the signals from the two (2) receiver means in strength thereof determines the distance and the direction from the position indicated by the light-emitting means or the transmitting means up to the vacuum cleaner.