Hydraulic and earth engineering – Earth treatment or control – Chemical
Patent
1978-12-14
1981-01-27
Novosad, Stephen J.
Hydraulic and earth engineering
Earth treatment or control
Chemical
405261, 411417, E21D 2002, E21D 2100
Patent
active
042472245
ABSTRACT:
A mine bolt formed of continuous fiber reinforced pultruded rod-like reinforcing element is disclosed. This rod-like element includes at least one helical groove and/or protrusion along its length, with the continuous reinforcing fibers in the protrusions or surrounding grooves generally conforming to the helical pattern of the outer surface of the rod. The bolts formed by the instant invention also have utility in reinforcing such structures as mine roofs or concrete. The bolt of the instant invention comprises the above helically grooved rod fitted with an end cap that fits the helical turns of the grooved rod. The end cap may also serve as the mine roof plate.
REFERENCES:
patent: 2949054 (1960-08-01), White
patent: 3283050 (1966-11-01), Boggs
patent: 3441637 (1969-04-01), Davis
patent: 3641772 (1972-02-01), Dietrich
patent: 3653217 (1972-04-01), Williams
patent: 3703396 (1972-11-01), Lamanche et al.
patent: 3859409 (1975-01-01), Coonrod
patent: 3861155 (1975-01-01), Steinberg et al.
patent: 3893303 (1975-07-01), Rotter
patent: 4140428 (1979-02-01), McLain et al.
Coal Age, "How to Keep the Roof from Falling in on Your Profits", ad by DuPont Corp., Mid-May Issue.
Curley John E.
Leipold Paul A.
Novosad Stephen J.
PPG Industries Inc.
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