Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Reexamination Certificate
2005-11-29
2005-11-29
Warden, Sr., Robert J. (Department: 1744)
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
C015S339000, C700S245000, C700S247000, C700S253000, C700S257000, C340S870030, C701S025000
Reexamination Certificate
active
06968592
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.
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Arai Yutaka
Koseki Atsushi
Nemoto Yasuhiro
Tajima Taiji
Takeuchi Ikuo
Antonelli, Terry Stout and Kraus, LLP.
Cole Laura C
Hitachi , Ltd.
Warden, Sr. Robert J.
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