发明名称 |
Low friction power tong jaw assembly |
摘要 |
The present invention provides an improved power tong jaw having a jaw body with a roller aperture formed therein. A jaw roller is positioned in said roller aperture by some type of retaining surface, such as a roller pin. Additionally, a friction reducing surface is formed between the jaw roller and the jaw pin. In one embodiment, this friction reducing surface comprises a plurality of needle bearings. In alternate embodiments, the friction reducing surface comprises ball bearings, journal bearings, or recirculating ball bearings.
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申请公布号 |
US5819605(A) |
申请公布日期 |
1998.10.13 |
申请号 |
US19970862555 |
申请日期 |
1997.05.23 |
申请人 |
BUCK, DAVID A.;BANGERT, DANIEL S. |
发明人 |
BUCK, DAVID A.;BANGERT, DANIEL S. |
分类号 |
E21B19/16;(IPC1-7):B25B13/50 |
主分类号 |
E21B19/16 |
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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