| 发明名称 |
Screw thread coupling |
| 摘要 |
A thread coupling comprises two interconnected screw threads. Each of the screw threads has a root portion shaped as a portion of an ellipse. With respect to one of the threads having such a shape, the major axis of the ellipse is longer than that of the other thread.
|
| 申请公布号 |
US5060740(A) |
申请公布日期 |
1991.10.29 |
| 申请号 |
US19900529377 |
申请日期 |
1990.05.29 |
| 申请人 |
SANDVIK ROCK TOOLS, INC. |
发明人 |
YOUSEF, FAISAL J.;KANE, ROBERT F.;HAM, JOEL;MILDREN, DAVID |
| 分类号 |
E21B17/042;F16B33/02;F16L15/06 |
主分类号 |
E21B17/042 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
