发明名称 |
DEVICE FOR PRODUCING A BORE IN THE GROUND, ROTARY DRIVE DEVICE AND ROTARY SEAL ARRANGEMENT |
摘要 |
A device for producing a bore in the ground includes a spindle comprising a rotary lead-through and a first sealing face configured to be cylindrical. The spindle is configured so as to be rotatably led through a housing via the rotary lead-through. The housing comprises a second sealing face configured to be concentric with respect to the first sealing face. A rotary seal arrangement is configured to seal the rotary lead-through of the spindle through the housing. The rotary seal arrangement comprises a shaft seal configured to act between the first sealing face of the spindle and the second sealing face of the housing. A labyrinth seal is arranged upstream of the shaft seal when viewed from an outside of the housing. |
申请公布号 |
US2014175749(A1) |
申请公布日期 |
2014.06.26 |
申请号 |
US201214234633 |
申请日期 |
2012.07.12 |
申请人 |
Foerster Frank;Dolls Thomas |
发明人 |
Foerster Frank;Dolls Thomas |
分类号 |
E21B4/00;E21B3/02 |
主分类号 |
E21B4/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
Viersen DE |