Earth working machine having independent tools and roof engaging

Details Earth working machine having independent tools and roof engaging Earth working machine having independent tools and roof engaging

1977-04-13

1978-07-04

Purser, Ernest R.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

With mine roof-supporting means

173 35, 173 46, E21C 3300

Patent

active

040985385

ABSTRACT:
A mobile earth working machine has a tracked base on which various tools such as an impactor hammer and a side delivery bucket are mounted on separate booms.
To permit two or more tools to be used simultaneously, while tunnelling, a locking or clamping arrangement is provided on the machine which is operational when the machine is stationary and braked to clamp to machine between floor and roof. The locking arrangement is a bridge structure preferably mounting three ram-movable clamp plates.

REFERENCES:
patent: 1290021 (1918-12-01), Levin
patent: 1321427 (1919-11-01), Fisher
patent: 1755332 (1930-04-01), Morgan

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