Electricity: circuit makers and breakers – Contact moved by sudden release of stored energy
Reexamination Certificate
2006-05-16
2006-05-16
Lee, K (Department: 2832)
Electricity: circuit makers and breakers
Contact moved by sudden release of stored energy,
C200S401000, C218S154000, C335S167000, C335S172000
Reexamination Certificate
active
07045733
ABSTRACT:
Described herein is a low-voltage circuit-breaker, which comprises at least one mobile contact and a corresponding fixed contact, and a positive-opening-operation device. The positive-opening-operation device in turn comprises: a moving element associated to the mobile contact; a first kinematic chain, operatively associated to said mobile contact and to an actuating device; and a second kinematic chain, associated to said moving element and to said first kinematic chain. A first lever is associated to the first kinematic chain and a second lever is associated to the second kinematic chain, said first and second levers interacting with one another during the opening operation and being equipped with blocking devices in the event of welding of the contacts together.
REFERENCES:
patent: 3921109 (1975-11-01), Hodgson
patent: 5250918 (1993-10-01), Edds et al.
patent: 5260533 (1993-11-01), Livesey et al.
patent: 6316742 (2001-11-01), Rostron et al.
Bresciani Nicola
Martir Roberto Rota
ABB Service S.r.l.
Connolly Bove & Lodge & Hutz LLP
Lee K
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