| 摘要 |
<p>Known screw clamp devices comprise two jaws normally integral with a common base, and a tightening screw engaging both jaws. It is known for the inherent resilience of the material of which the jaws and base are made to be such that the jaws, once tightened onto a member, do not slacken off when the tightening screw is unscrewed. This problem is overcome by making part of the tightening screw and one of the jaws in such a manner that said screw is freely rotatable whilst being held against movements relative to said one jaw in the direction of the longitudinal axis of said screw, and by making another part of said screw and the other jaw with complementary external and internal screw threads, respectively. <IMAGE></p> |
