Protective unit to prevent contact with conductive contacts...

Details Protective unit to prevent contact with conductive contacts... Protective unit to prevent contact with conductive contacts...

2006-06-27

2006-06-27

Enad, Elvin (Department: 2832)

Electricity: circuit makers and breakers

Interlocking

Drawout-type switchgear

C200S050230

Reexamination Certificate

active

07067747

ABSTRACT:
A protective unit may prevent contact with conductive contacts in a withdrawable rack of a switching device. This may include one displaceable protective plate and lever arrangement for operating the protective plate. The lever arrangement has two levers that are interconnected in an articulated manner, of which a first lever can be operated by way of the switching device and the second lever is coupled to the mobile protective plate. A linking joint of the two levers acts simultaneously as the pivot bearing of the first lever and the first lever can be pivoted out of the displacement path of the switching device into an end position by way of a slide block that runs in a graded manner in the pivoting direction of the first lever.

REFERENCES:
patent: 2943163 (1960-06-01), Hay
patent: 3778568 (1973-12-01), Wilson
patent: 4209676 (1980-06-01), Clausing
patent: 4443676 (1984-04-01), Castonguay
patent: 4933519 (1990-06-01), Milianowicz et al.
patent: 6031191 (2000-02-01), Ahlert et al.
patent: 6184483 (2001-02-01), Coudert et al.
patent: 6727442 (2004-04-01), Byron et al.
patent: 0235492 (1986-12-01), None
patent: 0803140 (1996-01-01), None

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