| 摘要 |
A self cutting expansion anchor and system having a sleeve member with a plurality of expandable sections disposed about a shaft, the expandable sections having an end portion disposed toward a generally conical portion of the shaft, a heat hardened cutting portion protruding from at least some of the expandable sections of the slee ve member, the hardened cutting portions and the corresponding expandable sections are unitary members, and a threaded sleeve member having a driving end disposed about the threaded shaft toward a driving end of the sleeve.
|
