Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Reexamination Certificate
2006-03-29
2009-02-03
Gutierrez, Diego (Department: 2831)
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
C324S421000
Reexamination Certificate
active
07486088
ABSTRACT:
An apparatus for preventing corrosion of a contact includes a detection conducting path connected to the contact, a variable impedance unit and a comparing and switching unit. The variable impedance unit is connected to the detection conducting path. The variable impedance unit is switchable between (i) a first impedance used for passing a corrosion prevention current into the detection conducting path and (ii) a second impedance through used for passing a current, which is used for detecting a connection state of the contact, into the detection conducting path. The first impedance is lower than the second impedance. The comparing and switching unit compares a detected value with a corrosion threshold, compares the detected value with a restoration threshold and switches the variable impedance unit based on comparing results.
REFERENCES:
patent: 4491797 (1985-01-01), Velsher
patent: 4873603 (1989-10-01), Ishii
patent: 5523633 (1996-06-01), Imaizumi et al.
patent: 5751530 (1998-05-01), Pelly et al.
patent: 7109721 (2006-09-01), Maurer et al.
patent: 7119799 (2006-10-01), Kaski
patent: 2005/0231858 (2005-10-01), Komatsu et al.
patent: 2005/0231876 (2005-10-01), Komatsu et al.
patent: 2005/0231877 (2005-10-01), Komatsu et al.
patent: 2007/0120567 (2007-05-01), Hagel et al.
patent: A 2002-343171 (2002-11-01), None
patent: A 2005-294198 (2005-10-01), None
patent: A 2005-294199 (2005-10-01), None
patent: A 2005-294200 (2005-10-01), None
Kasame Tomohide
Komatsu Kazuhiro
Oonishi Kouji
Fujitsu Ten Limited
Gutierrez Diego
He Amy
Oliff & Berridg,e PLC
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