Entrapment detection and prevention device for...

Details Entrapment detection and prevention device for... Entrapment detection and prevention device for...

2011-07-26

2011-07-26

Noori, Max (Department: 2855)

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

Specified electrical sensor or system

C073S862626

Reexamination Certificate

active

07984655

ABSTRACT:
An entrapment prevention and detection device for an opening/closing mechanism detects entrapment with a simple structure and does not occupy much space. When a foreign object, such as a human body part approaches a window glass, such as an automobile window, the capacitance of a capacitive sensor increases. A control circuit compares a most recent capacitance obtained by a capacitance detection circuit with a previous value and if the most recent capacitance value is greater than the previous value, when the glass is being raised (closed), the control circuit determines that a foreign object has approached the glass and then stops or lowers (opens) the glass.

REFERENCES:
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patent: 7464980 (2008-12-01), Gutendorf et al.
patent: 7548809 (2009-06-01), Westerhoff
patent: 7714595 (2010-05-01), Fujiwara et al.
patent: 2003148046 (2003-05-01), None
patent: 2003336448 (2003-11-01), None
patent: 2007009456 (2007-01-01), None

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