发明名称 |
LIQUID SEAL FOR WET ROOF BIT |
摘要 |
Fluid roof bits for mining typically supply high pressure water to a location immediately adjacent the cutting insert of the roof bit to flush debris and cool the cutting insert. The present invention is a drill steel assembly for a wet roof bit that reduces the fluid pressure loss supplied to the roof bit. A drill head body is connected to the drill steel by an intermediate adaptor. The adaptor has a spring loaded button thereon that mates with an opening in the drill head body so that the drill head body can be conveniently snapped onto the drill head assembly. A bushing seal made from a flexible material is clamped between said drill steel adaptor and the drill head body to limit fluid pressure losses. |
申请公布号 |
PL201359(B1) |
申请公布日期 |
2009.04.30 |
申请号 |
PL20020367973 |
申请日期 |
2002.09.06 |
申请人 |
KENNAMETAL INC. |
发明人 |
BISE DOUGLAS E.;HAGA PHILLIP W. |
分类号 |
E21B10/00;E21B10/60;E21B17/046;E21D20/00 |
主分类号 |
E21B10/00 |
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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