发明名称 |
ORGANE FILETE DE FIXATION, ET OUTIL ET PROCEDE DE MISE EN PLACE D'UN TEL ORGANE |
摘要 |
A torque-limited screw-threaded locking fastener comprises an externally threaded shank (41) and an internally threaded collar (20). At least one convolution of the shank threads (43) is non-circular. The collar (20) has a nut section (25) connected by a shear section (35) to a drive section (21). The shear section (35) fractures when a predetermined torque is exerted between the two sections (21,25). The nut section (25) has an external rib(s) (33) engageable by a swaging tool (60) to radially inwardly displace the rib (33) so as to displace nut section material into the non-circular convolution (45) whereby to lock the nut (25) to the shank (41) after the drive section (21) is torqued off. The swaging of the rib to a lesser radial dimension does not change the torque level which was applied when the drive section (21) was torqued off. <IMAGE> |
申请公布号 |
FR2551148(B1) |
申请公布日期 |
1988.12.30 |
申请号 |
FR19830013678 |
申请日期 |
1983.08.24 |
申请人 |
HI SHEAR CORP |
发明人 |
HERMAN LEROY WILLIAMSON |
分类号 |
B25B13/06;B25B23/14;F16B39/02 |
主分类号 |
B25B13/06 |
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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