发明名称 |
Spade bit having threaded conical tip portion |
摘要 |
A bit including a shaft defining an axis about which the bit is configured to be rotated. The bit further includes a blade having a first end attached to the shaft and an opposite second end, the blade further having (i) a first blade portion including a first shoulder defining a first cutting edge portion at the second end of the blade, and (ii) a second blade portion including a second shoulder defining a second cutting edge portion at the second end of the blade. The bit additionally includes a frusto-conically-shaped tip portion having an apex and being attached to the second end of the blade. The frusto-conically-shaped tip portion includes threads extending from the apex to a location adjacent to the first cutting edge portion and the second cutting edge portion. |
申请公布号 |
US8262325(B2) |
申请公布日期 |
2012.09.11 |
申请号 |
US20080248689 |
申请日期 |
2008.10.09 |
申请人 |
DOST HAGEN W.;SANDOVAL JAVIER I.;MCAULIFFE PATRICK M.;NACHTIGALL CREIGHTON W.;OSBERG KENNETH C.;ROBERT BOSCH GMBH |
发明人 |
DOST HAGEN W.;SANDOVAL JAVIER I.;MCAULIFFE PATRICK M.;NACHTIGALL CREIGHTON W.;OSBERG KENNETH C. |
分类号 |
B23B51/00 |
主分类号 |
B23B51/00 |
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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