发明名称 |
Drill bit with covered ring nozzle retainer |
摘要 |
An improved nozzle retention system in an earth boring bit of the rolling cutter type using a pliable coating bonded to a nozzle retention snap ring in a manner to permit normal seating of the snap ring by bonding the coating only to the inner periphery and portion of a lower surface of the snap ring. The coating material disclosed is elastomeric, including nitrile rubber.
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申请公布号 |
US4793426(A) |
申请公布日期 |
1988.12.27 |
申请号 |
US19860935428 |
申请日期 |
1986.11.26 |
申请人 |
MILLSAPPS, JR., STUART C.;HUGHES TOOL CO |
发明人 |
MILLSAPPS, JR., STUART C. |
分类号 |
E21B10/18;E21B10/60;E21B10/61;E21B10/62;(IPC1-7):E21B10/18 |
主分类号 |
E21B10/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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