Mining or in situ disintegration of hard material – Hard material disintegrating machines – Cutter shiftable vertically
Patent
1974-12-23
1976-05-04
Purser, Ernest R.
Mining or in situ disintegration of hard material
Hard material disintegrating machines
Cutter shiftable vertically
299 84, E21C 2524
Patent
active
039543013
ABSTRACT:
A mechanism for cutting hard earth formations such as rock comprises a prime mover vehicle such as a crawler tractor having a back plate fixed thereto. An elongated cutter bar framework is secured to the back plate in pivotal manner by means of a tool bar structure that is pivoted directly to the back plate. A motor mechanism such as a linear fluid motor is interconnected between the tool bar and the vehicle structure and is controllably operative for establishing particular angular relationships of the cutter bar framework relative to the formation to be cut and having the effect of controlling the depth of the cut being made. An endless chain conveyor assembly is disposed about idler and drive sprockets disposed at the extremities of the cutter bar framework, the conveyor comprising a plurality of pivotally interconnected chain links, each of which links supports one or more earth cutting tools which function in cooperative relationship to cut the earth formation as the chain link conveyor is rotated by the motor powered drive sprocket. To prevent excessive wear of the chain link conveyor assembly by lateral thrust loads that may be applied thereto during earth cutting operations, means is provided on the cutter bar framework defining a plurality of elongated guide and lateral thrust load support surfaces and each of the links of the chain link conveyor is provided with opposed thrust force transmitting flanges that are ordinarily disposed in juxtaposed relation with the guide surface and which engage the guide and lateral thrust load support surfaces as thrust loading is applied and limit lateral movement of the links.
REFERENCES:
patent: 2324033 (1943-07-01), Simmons
patent: 2561657 (1951-07-01), Fulke
patent: 2749105 (1956-06-01), Sibley
patent: 3604755 (1971-09-01), Krekeler
patent: 3856358 (1974-12-01), Krekeler
Boring & Tunneling Co. of America, Inc.
Purser Ernest R.
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