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

1986-08-27

1987-10-20

Taylor, Dennis L.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405291, 405295, 403154, 403163, E21D 1900

Patent

active

047010797

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 goaf shield and are connected with pivot connections each of which is composed of a pin inserted into apertures in the side walls of the plates. The pin has a peripheral groove at its inner end region which receives an arcuate yoke plate serving as a support. The yoke plate is itself detachably secured in place with a releasable rod permitting the pivot connection to be easily dismantled.

REFERENCES:
patent: 2847238 (1958-08-01), Bolling, Jr.
patent: 3233930 (1966-02-01), Becker
patent: 3885396 (1975-05-01), Snowden et al.
patent: 4236850 (1980-12-01), Koppers et al.
patent: 4252477 (1981-02-01), Bollmann
patent: 4293247 (1981-10-01), Rosenberg et al.
patent: 4382722 (1983-05-01), Romanowicz et al.
patent: 4389135 (1983-06-01), Peters
patent: 4477202 (1984-10-01), Price
patent: 4548587 (1985-10-01), Slattery
patent: 4607986 (1986-08-01), Brown

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