Electricity: circuit makers and breakers – Snap
Reexamination Certificate
2006-05-08
2008-08-19
Friedhofer, Michael A (Department: 2832)
Electricity: circuit makers and breakers
Snap
C200S341000, C335S128000, C335S080000
Reexamination Certificate
active
07414214
ABSTRACT:
The invention relates to a contact arrangement of a relay with a contact head (11) with a crown (17) which encloses a contact surface (15) and is raised with respect to the contact surface. According to the invention, for increasing the contact reliability with a dry switching load, this crown (17) is interrupted at a multitude of locations, by which means teeth (21) and intermediate spaces between the teeth (21) are formed. This crown contact head in the closed position of the contact arrangement bears on a crownless contact head. The contact spring (23) carrying the movable contact head is designed in a manner such that it may be subjected to torsion. The result of this is that the crown contact head (11) reliably contacts the crownless adjacent contact head (25) at the two small-surfaced contact locations, in each case with a high specific surface pressing.
REFERENCES:
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patent: 4967043 (1990-10-01), Killarney
patent: 5017747 (1991-05-01), Nagahara et al.
patent: 6847000 (2005-01-01), Marchini et al.
patent: 6919523 (2005-07-01), Lai
patent: 6998555 (2006-02-01), Collot et al.
patent: 7081593 (2006-07-01), Hopkins
patent: 2004/0069606 (2004-04-01), Lee
patent: 2005/0109601 (2005-05-01), Collot et al.
Buchanan Ingersoll and Rooney
Elesta Relays GmbH
Friedhofer Michael A
Klaus Lisa N
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