| 摘要 |
1480230 Anchor bolts TITAN MFG CO PTY Ltd 16 Dec 1974 [17 Dec 1973 14 Oct 1974] 54289/74 Heading F2H A method of installing a stud 6 in a bore, e.g. in a mine roof comprises using a nut 10 which initially rotates the stud to mix resin released into the bore from a container 5 ruptured by driving in the stud and only screws down the stud thread when torque is increased by setting of the resin. After mixing, the stud is held stationary to permit setting and the nut is then fully engaged with the thread to achieve the temporary non-rotatable engagement, the threads may interfer or the nut or stud thread may have a deformation. The nut may have a series of indentations 15 which engage the stud end. |
