F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
85/27
F16B 13/06 (2006.01) E21D 23/00 (2006.01)
Patent
CA 1110091
ABSTRACT OF THE DISCLOSURE A bail type expansion anchor for mine roofs and the like including a threaded bolt, and expander cone nut, and an ex- pansible shell assembled together, with the shell formed from an integral blank of sheet metal having a pair of initially flat rec- tangular leaves bent to semi-cylindrical configuration with side edges thereof in abutment with each other to define a complete cylinder and having a bail strap of U-shaped configuration extend- ing upwardly from the leaves and along side the cone nut. The bolt is threaded through the cone nut with the cone nut extending be- tween the leaves of the shell, and the bail portion of the shell includes a circular top portion having a pop-out center having an interrupted circular periphery of slightly larger diameter than the bolt aligned with the bolt and connected to the remainder of the bail by frangible uncut attachment sections, designed to be broken out from the bail upon predetermined rotation of the bolt and form an aperture for passage of the bolt therethrough.
304441
Macrae & Co.
Stratabolt Corporation
LandOfFree
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