Roof support pin

Details Roof support pin Roof support pin

1982-04-12

1984-09-18

Taylor, Dennis L.

Hydraulic and earth engineering

Earth treatment or control

Rock or earth bolt or anchor

411513, 411521, E21D 2000, E21D 2100

Patent

active

044720874

ABSTRACT:
A roof support pin for insertion into a roof bore having an opening comprising an elongate tube for insertion into the bore, the tube being compressed prior to insertion of the tube into the bore opening so that the tube expands to frictionally engage the bore a distance from the bore opening. In one embodiment, a roof support plate has a hole with a diameter smaller than the diameter of the bore. The plate hole compresses the diameter of the tube upon insertion of the tube into the bore through the plate hole. In one aspect, the tube includes adjacent opposed longitudinal edges forming a longitudinal slit. The tube edges engage and are turned resiliently inwardly of the tube at the longitudinal slit as the tube is circumferentially resiliently compressed, and resiliently coacting to provide an expansion force for frictional engagement of the tube with the bore.

REFERENCES:
patent: 872180 (1907-11-01), Hite
patent: 1142471 (1915-06-01), White
patent: 1304885 (1919-05-01), Kennedy
patent: 2412008 (1946-12-01), Reinhardt
patent: 3227030 (1966-01-01), Preziosi et al.
patent: 3557402 (1971-01-01), Koehl
patent: 4284379 (1981-08-01), Chaiko

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