Dynamic earth anchor, and a sleeve therefor

Details Dynamic earth anchor, and a sleeve therefor Dynamic earth anchor, and a sleeve therefor

1991-04-11

1992-08-11

Reese, Randolph A.

Hydraulic and earth engineering

Earth treatment or control

Rock or earth bolt or anchor

411 44, 411 60, 411 62, 411 69, E21D 2100, E21D 2000, F16B 1306

Patent

active

051373955

ABSTRACT:
An apparatus comprising a sleeve insertable into a borehole, the borehole having a first diameter. A roof pin is inserted into the sleeve, the roof pin having a second outer diameter which is less than the first diameter. The outer surface has a peripheral dimension prior to insertion of the sleeve into the borehole. The inner or the outer surface contains at least one longitudinally extending yieldable channel portion which is of a lesser sleeve thickness than the remainder of the sleeve, permitting circumferential expansion of the sleeve. Expansion of the sleeve establishes a restraint between the roof pin and the borehole. When the sleeve is expanded within the borehole, continuous peripheral contact is made between the outer surface and the borehole.

REFERENCES:
patent: Re32645 (1988-04-01), Scott
patent: 1229287 (1917-06-01), Kennedy
patent: 1438855 (1922-12-01), Rawlings
patent: 2024064 (1935-12-01), Schaefer
patent: 4218954 (1980-08-01), Morel
patent: 4430025 (1984-02-01), Ciavatta
patent: 4474516 (1984-10-01), Schiefer
patent: 4475856 (1984-10-01), Toomingas
patent: 4650373 (1987-03-01), Seegmiller
patent: 4659258 (1987-04-01), Scott
patent: 4836729 (1989-06-01), Bisping et al.

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