Electricity: measuring and testing – Electromechanical switching device – Relay
Reexamination Certificate
2006-07-12
2008-12-02
Gutierrez, Diego (Department: 2831)
Electricity: measuring and testing
Electromechanical switching device
Relay
C324S419000, C324S423000, C307S039000, C361S179000, C361S189000
Reexamination Certificate
active
07459910
ABSTRACT:
A contact welding detecting device includes: a relay including a first contact for permitting and breaking transmission of a first DC input potential to a first output and a second contact for permitting and breaking transmission of a second DC input potential; a relay open/close control unit that simultaneously controls to open and close the first and second contacts when welding of at least one of the first and second contacts is detected; a first potential difference detection unit that detects a potential difference between a first point at an input side of the first contact and a second point at an output side of the second contact; and a second potential difference detection unit that detects a potential difference between a third point at an output side of the first contact and a fourth point at an input side of the second contact.
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Kato Sutemaro
Kawamura Makoto
Niwa Kuniyuki
Baldridge Benjamin M
Gutierrez Diego
Jtekt Corporation
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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