Patent ID: 6224164
Filing Date: 2001-05-01
Classification: E21C,E21D

Abstract:
A mining machine, comprising:a chassis;a cutting mechanism; andan actuation assembly affixed to said chassis and said cutting mechanism for selectively moving said cutting mechanism forward of said chassis, down across a surface to be mined and rearwardly towards said chassis, said actuation assembly comprising:a cutting member support frame operably supporting at least one cutting member thereon;a support member pivotally attached to said cutting member support frame such that said cutting member support frame is selectively pivotable relative to said support member about a first axis;a first actuator attached to said support member and said mining machine chassis for selectively positioning said first axis relative to said mining machine chassis in a predetermined position; anda first linkage assembly comprising a first link having one end pivotally attached to the cutting member support frame, and another end pivotally connected to a second actuator attached to said support member, anda support link having one end pivotally attached to the support member, and another end pivotally attached to the first link and the second actuator for selectively pivoting said cutting member support frame relative to said support member about said first axis.