Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Reexamination Certificate
2006-09-27
2008-08-05
Hannaher, Constantine (Department: 2884)
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
C015S049100
Reexamination Certificate
active
07408157
ABSTRACT:
An infrared sensor at lower production cost for optimal massive production includes an infrared sensor unit disposed to the bottom of an automatic vacuum cleaner to measure the level of the ground to prevent the vacuum cleaner from turning overdue to any drop height created on the ground; a slide screen being disposed on the infrared sensor unit; and a small gateway to control the area for receiving energy of the infrared ray to precisely measure the drop height of the ground for the vacuum cleaner to automatically take turn whenever the drop height is detected to prevent a possible falling over.
REFERENCES:
patent: 6968592 (2005-11-01), Takeuchi et al.
patent: 2007/0016328 (2007-01-01), Ziegler et al.
Birch & Stewart Kolasch & Birch, LLP
Hannaher Constantine
Taningco Marcus H
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