Pivot connections for use with mine roof supports

Details Pivot connections for use with mine roof supports Pivot connections for use with mine roof supports

1986-10-20

1987-11-24

Taylor, Dennis L.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405291, 403348, 403353, E21D 2304

Patent

active

047085312

ABSTRACT:
A mine roof support has gap seals in the form of L-shaped plates on its roof cap and goaf shield. The side walls of the plates overlap at the junctures between the roof cap and the goaf shield and these walls are interconnected with pivot connections each of which is composed of complementary components fitted into openings in the walls. The components combine to form a pivot journal and and are locked to one another by a twist catch which can be released by relative rotation of the components.

REFERENCES:
patent: 2165163 (1939-07-01), Waters
patent: 2744771 (1956-05-01), Laurent
patent: 3017217 (1962-01-01), Keating
patent: 3860209 (1975-01-01), Strecker
patent: 4125339 (1978-11-01), Pittinger, Sr. et al.
patent: 4197762 (1980-04-01), Yamana
patent: 4236850 (1980-12-01), Koppers et al.
patent: 4293247 (1981-10-01), Rosenberg et al.
patent: 4392279 (1983-07-01), Schwager
patent: 4400856 (1983-08-01), Tseng
patent: 4552487 (1985-11-01), Weirich

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