| 摘要 |
The tightening instrument is made up of two parts ( 2,4 ) joined to each other by means which are designed to automatically uncouple the said two parts ( 2,4 ) by shearing rupture of a pin ( 8 ) when a predetermined tightening torque is reached, a first ( 2 ) of the two parts being provided with a means ( 3 ) permitting driving, characterized in that the second ( 4 ) of the two parts is a rod whose end ( 5 ) opposite its tightening end ( 6 ) is adapted to be introduced into a complementary recess ( 7 ) formed in the first part ( 2 ), and in that the said end ( 5 ) includes an axial reservoir ( 15 ) for receiving the broken end section ( 18 ) of the pin ( 8 ). |
