Earth structure stabilizer

Details Earth structure stabilizer Earth structure stabilizer

1979-07-25

1981-08-18

Britts, Ramon S.

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

Having separate expander means

Including sleeve and distinct tapered expander

405259, 411521, F16B 1306, E21D 2100

Patent

active

042843790

ABSTRACT:
According to a preferred embodiment of the invention the stabilizer comprises an elongate, generally annular element for insertion into an undersized bore in a roof or wall of a mine shaft, or tunnel, or the like, for frictionally engaging the bore surface to stabilize the subterranean earth structure in which the bore is formed, in which the element has stiffening ribs disposed lengthwise thereof in order that the stabilizer may be formed of relatively thin material without significant loss of longitudinal strength. The ribs are defined by inwardly-directed channels, formed in the outer surface of the stabilizer, which facilitate circumferential compression of the stabilizer so that the latter can be readily inserted into the undersized, earth structure bore.

REFERENCES:
patent: 937039 (1909-10-01), Bauer
patent: 1410258 (1922-03-01), Kennedy
patent: 1802270 (1931-04-01), Rawlings
patent: 2931412 (1960-04-01), Wing
patent: 3425311 (1969-02-01), Levy
patent: 3667341 (1972-06-01), Kaplan
patent: 3922867 (1975-12-01), Scott

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