Protective canopy and temporary roof support for mining machiner

Details Protective canopy and temporary roof support for mining machiner Protective canopy and temporary roof support for mining machiner

1978-10-03

1980-02-26

Taylor, Dennis L.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

175219, 405303, E21C 1102

Patent

active

041903854

ABSTRACT:
An upright hydraulic jack with a mine roof-engaging pad on its upper end and a skid shoe on its lower end is connected to one side of an elevatable canopy over an operator station.

REFERENCES:
patent: 2806673 (1957-09-01), Danielsson
patent: 3113661 (1963-12-01), Linke et al.
patent: 4079792 (1978-03-01), Paul et al.
patent: 4108253 (1978-08-01), Woodford

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