An elastomeric o-ring rock bit seal is disclosed with two or more integrally bonded elastomers or phenolic type materials joined together to form the seal. The dynamic sealing face adjacent the journal bearing is fabricated from an elastomer/phenolic engineered specifically for wear resistance The bulk of the seal adjacent the static seal retention cavity typically formed in the rotary cone is molded from an elastomer engineered specifically for precise control of the seal contact force adjacent the dynamic seal face when the seal is compressed against the dynamic face by the seal retention cavity in the cone.
申请公布号
USRE36452(E)
申请公布日期
1999.12.21
申请号
US19960649954
申请日期
1996.07.08
申请人
SMITH INTERNATIONAL, INC.
发明人
UPTON, ROBERT G.;HOOPER, MICHAEL E.;PYKA, JERRY;CHAMBERS, ROBERT;PORTWOOD, GARY;JOHNSTON, RANDY