Mining or in situ disintegration of hard material – Hard material disintegrating machines – Stepper-type advance-causing means
Patent
1979-05-16
1981-03-17
Purser, Ernest R.
Mining or in situ disintegration of hard material
Hard material disintegrating machines
Stepper-type advance-causing means
299 11, 299 33, 299 49, 405299, E21C 2902, E21D 2324
Patent
active
042563437
ABSTRACT:
An improved advancing mechanism for a dual auger continuous miner of the type adapted to be advanced by a pair of anchoring jack assemblies, a pair of cables extending from the anchoring jack assemblies to a pair of winch mechanisms on the sides of the frame. The mechanism includes a mounting arm mounted on each side of the frame for movement about a vertical axis, a telescoping structure extending longitudinally between each mounting arm and the associated anchoring jack assembly and hydraulic piston and cylinder units for effecting the pivotal movement of each arm and the telescoping movement of each telescoping structure.
REFERENCES:
patent: 3026098 (1962-03-01), Wilcox
patent: 3169796 (1965-02-01), Long et al.
patent: 3225547 (1965-12-01), Hoffmann
patent: 3282403 (1966-11-01), Todd
patent: 3305268 (1967-02-01), Todd
patent: 3306667 (1967-02-01), Todd
patent: 3592010 (1971-07-01), Gaskell
patent: 3858940 (1975-01-01), Lagowski
Black Sigmund
Lagowski Joseph V.
Plumley Roger D.
Whitt Jerry C.
Fairchild Incorporated
Purser Ernest R.
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