Electricity: motive power systems – Automatic and/or with time-delay means – Movement – position – or limit-of-travel
Reexamination Certificate
2006-06-07
2008-07-01
Masih, Karen (Department: 2837)
Electricity: motive power systems
Automatic and/or with time-delay means
Movement, position, or limit-of-travel
C318S468000, C318S472000, C318S473000, C318S476000, C318S477000
Reexamination Certificate
active
07394216
ABSTRACT:
An automatic anti-trap device is provided to add safety to other apparatuses. The automatic anti-trap device of this invention has a driving circuit to control a motor, a current sensor to generate a current signal, a current ripple peak value circuit to generate a current ripple peak value signal according to the current signal, and a micro processor to generate a working signal for the driving circuit to control the motor according to a keystroke signal, the current signal and the current ripple peak value signal.
REFERENCES:
patent: 5530329 (1996-06-01), Shigematsu et al.
patent: 5592777 (1997-01-01), Petri et al.
patent: 2004/0178758 (2004-09-01), Shinohara
Hsu Yu-Chia
Shen Te-Yang
Yeh Ming
Yu Yuan-Ying
Delta Electronics , Inc.
Masih Karen
Muncy Geissler Olds & Lowe, PLLC
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