Patent ID: 9530592
Filing Date: 2016-12-27
CPC Classification: H01H

Claim Text:
1. An arc extinguishing assembly, comprising: an arc chamber having an arc chamber width (b) adjacent to a contact arm tip of a contact arm; stacked arc plates located at a forward end of the arc chamber adjacent to the contact arm tip; and a first fin feature and a second fin feature located at the forward end between the arc plates and the contact arm tip, the first fin feature including a first inner edge and the second fin feature including a second inner edge, wherein the first inner edge and the second inner edge are spaced apart from one another by a spacing distance (a), wherein a venturi ratio indicative of a tubular length of varying diameter of a/b is equal to or less than 0.6, wherein the first fin feature comprises a first upper taper and the second fin feature comprises a second upper taper.