Anchor bolt assembly

Details Anchor bolt assembly Anchor bolt assembly

1982-05-03

1984-10-16

Taylor, Dennis L.

Hydraulic and earth engineering

Earth treatment or control

Chemical

405259, 411 2, 411 5, E21D 2002

Patent

active

044772092

ABSTRACT:
The anchor bolt assembly is of the type used in mine roofs where the anchor bolt is assembled and positioned in a drill hole in a rock formation and in which quick-setting adhesives secure the assembly to the rock formation. The assembly includes an elongated reinforcing rod, an elongated bolt, and a coupling internally threaded at each end and connected to the rod and bolt. A cylindrical plug of aluminum is positioned within the bore of the coupling and frictionally engaged by the threads so as to permit the entire assembly to turn in a first position and to disengage from its frictional engagement to permit turning of only the elongated bolt in a second position.

REFERENCES:
patent: 1692710 (1928-11-01), Spahn
patent: 3104582 (1963-09-01), White
patent: 3877235 (1925-04-01), Hill
patent: 4051683 (1977-10-01), Koval
patent: 4122753 (1978-10-01), Kuhlmann et al.
patent: 4132080 (1979-01-01), Hansen
patent: 4223740 (1980-09-01), Clayton
patent: 4295761 (1981-10-01), Hansen
patent: 4347020 (1982-08-01), White et al.

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