Contact

Electricity: circuit makers and breakers – Electric switch details – Contact

Reexamination Certificate

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Details

C439S840000

Reexamination Certificate

active

07999202

ABSTRACT:
A contact includes a first conductor that has a fitting hole formed therein; a second conductor that has a shaft that can be inserted into the fitting hole and an annular groove formed on an outer circumference of the shaft; and an inclined coil spring that has a ring inserted into a coil, is circularly formed by the ring to be provided inside the annular groove, and is in contact with the annular groove and the fitting hole to electrically connect the first and second conductors. The inclined coil spring is helically wound in a shape of an ellipse and is provided inside the annular groove so that a long axis of the ellipse is directed to an axial direction of the shaft and a short axis is directed to a radial direction of the shaft. Axial-direction both ends of the ring are in contact with a long-axis inner circumference of the inclined coil spring.

REFERENCES:
patent: 3818421 (1974-06-01), Kruger
patent: 3911197 (1975-10-01), Kruger
patent: 4805943 (1989-02-01), Balsells
patent: 5474309 (1995-12-01), Balsells
patent: 5503375 (1996-04-01), Balsells
patent: 5545842 (1996-08-01), Balsells
patent: 5807146 (1998-09-01), Baker
patent: 6835084 (2004-12-01), Poon et al.
patent: 7274964 (2007-09-01), Balsells
patent: 7722415 (2010-05-01), Chansrivong
patent: 2004/0175229 (2004-09-01), Balsells
patent: 7-22254 (1995-01-01), None
patent: 8-210404 (1996-08-01), None
patent: 2006-518090 (2006-08-01), None
patent: WO 98/40932 (1998-09-01), None
International Search Report (PCT/ISA/210) dated May 23, 2008.
Written Opinion (PCT/ISA/237) dated Jun. 3, 2008.

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