<p>An earth bit seal includes a magnetic ring that determines how strongly the earth bit seal engages a lug and/or cone of an earth bit. The earth bit seal also includes a flexible ring positioned away from any dynamic sealing surfaces that engage the lug or cone. The flexible ring is positioned away from the dynamic sealing surfaces so that, if it becomes impregnated with debris, it will not act as an abrasive ring that undesirably removes material from them, or from the lug and cone.</p>
申请公布号
WO2008073873(A2)
申请公布日期
2008.06.19
申请号
WO2007US86937
申请日期
2007.12.10
申请人
ATLAS COPCO SECOROC LLC;PETERSON, GREGORY W.;LANGFORD, JIM W.