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US 4,101,173 AGranted
Roof prop and platform movably mounted on boom of tunnelling machine
AssigneeCoal Industry (Patents) Limited
InventorJohn Hedley Hodgkinson
Life of this patent
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AssigneeCoal Industry (Patents) Limited
InventorJohn Hedley Hodgkinson
Estimating the term…
A mineral mining machine of the type having a boom-mounted cutter assembly carried by a mobile base unit is provided with a face support structure which is pivotally mounted on the boom. Fluid operable rams are provided for moving the structure between a stowed position lying adjacent the boom and an operational face supporting position perpendicular to the longitudinal axis of the boom. The face support structure is brought into operation when it is desired to afford temporary support to a face of a ripping lip for example, in arch setting operations. In this latter respect, the boom also carries a stowable platform which can be opened out so that operatives may position themselves to handle arch sections which are elevated into position by a lifting mechanism also pivotally mounted on the boom.
A mineral mining machine includes a mobile base unit, a forwardly extending cutter-carrying boom mounted on the base unit and adapted for vertical and horizontal movement, a conveyor assembly attached to the base unit and extending from the front of the unit to the rear thereof, the conveyor unit being adapted to collect and convey material at the front of the unit to the rear of the unit for discharge, and a face support structure pivotally attached to the boom and being adapted for movement independently of the movement of said boom between an inoperative position adjacent the boom and a face supporting position orthogonal or substantially orthogonal to the longitudinal axis of the boom.
Dependencies are inferred from the claim text.