Hydraulic and earth engineering – Earth treatment or control – Chemical
Patent
1985-11-14
1987-03-17
Taylor, Dennis L.
Hydraulic and earth engineering
Earth treatment or control
Chemical
405259, 411512, 411 61, 411452, 411478, E21D 2100, E21D 2002
Patent
active
046503730
ABSTRACT:
An elongate hollow rock structure and installation wherein the elongated shank of the bolt is hollow and has a series of outwardly bowed side or side portions that are capable of resilient deflection. Fin means are provided in sides or side portion, with the overall span of the fin means being greater than the bolt hole into which the bolt is to be impacted. The pin means are tapered so as to provide for ease of insertion of the bolt. Impaction of the bolt into a mine roof hole provides for a compression loading of the fins of the bolt shank such that these engage the aperture wall in a forced-compression state. Corrosion factors are limited to fin edge contact with the aperture wall of the bolt hole. Resilient sides' deformation at the core of the bolt shank is relied upon to compression load the fins for frictional contact with the aperture wall into which the bolt is implaced.
REFERENCES:
patent: 141810 (1873-08-01), Nichols
patent: 2157216 (1939-05-01), Pollard
patent: 2412517 (1946-12-01), Klein
patent: 2754716 (1956-07-01), Bourns
patent: 3653217 (1972-04-01), Williams
patent: 4012913 (1977-03-01), Scott
patent: 4098087 (1978-07-01), Swain
patent: 4284379 (1981-08-01), Chaiko
Shaffer M. Ralph
Taylor Dennis L.
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