发明名称 |
Lock device for hollow stem augers |
摘要 |
A locking device or button for hollow stem auger couplings including an outer body section having an internal bore, a locking pin assembly mounted within the bore, and cooperating cam structure for moving the pin assembly a predetermined distance between locked and unlocked positions. Seal means at opposite ends of the bore keeps water and dirt out of the bore and protects the cam structure.
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申请公布号 |
US4844184(A) |
申请公布日期 |
1989.07.04 |
申请号 |
US19880250547 |
申请日期 |
1988.09.29 |
申请人 |
ACKER DRILL CO., INC. |
发明人 |
ACKER, III, WILLIAM L.;JANSON, LEROY W.;PIRRAMI, RICHARD |
分类号 |
E21B17/046;E21B17/22 |
主分类号 |
E21B17/046 |
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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