Rock anchor

Details Rock anchor Rock anchor

1991-03-04

1992-06-23

Lindsey, Rodney M.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Having separate expander means

Frangible member

411 54, F16B 1304

Patent

active

051237911

ABSTRACT:
A rock anchor adapted to be mounted in a bore opening at a rock face has a sleeve extending along a sleeve axis and having a body extending along an axis and having an inner end remote from the rock face and an inside surface and an outer end formed with a large-diameter head adapted to lie against the rock face. A wedge in the sleeve at the inner end has a flank extending at an acute angle to the axis. This wedge is fixed in the sleeve against axial movement therein. A drive pin engageable axially in the sleeve has a point engageable between the wedge flank and the inside surface of the sleeve so that when the sleeve is forcibly driven axially into the sleeve its point engages between the flank and the inside surface and plastically deforms the inside surface outward into tight engagement with the rock.

REFERENCES:
patent: 1798273 (1931-03-01), Pleister
patent: 4906149 (1990-03-01), Rockenfeller
patent: 4930963 (1990-06-01), Rockenfeller et al.

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