Expansion shell assembly

Details Expansion shell assembly Expansion shell assembly

1979-11-19

1981-07-14

Taylor, Dennis L.

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

Having separate expander means

Including sleeve and distinct tapered expander

405259, 411 53, 411 55, 411 57, 411 72, F16B 1306, F16B 1310

Patent

active

042780063

ABSTRACT:
An expansion anchor for a mine roof support bolt having a one-piece shell, a tapered nut and a strap for maintaining the shell and nut in assembled relation. The shell includes a circular collar having four fingers extending therefrom in a generally cylindrical configuration with an open slot between each pair of adjacent fingers. A pair of solid elements formed integrally with the rest of the shell extend between pair of adjacent fingers to bridge the slots on opposite sides of the shell. The strap extends over the top of the nut, through the slots and has bent-over end portions which are engaged under the solid elements bridging the slots.

REFERENCES:
patent: 1790841 (1931-02-01), Rosen
patent: 2647431 (1953-08-01), Lewis
patent: 3221590 (1965-12-01), Dickow
patent: 3315557 (1967-04-01), Dickow
patent: 3726181 (1973-04-01), Dickow et al.
patent: 3999459 (1976-12-01), Draa

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