Patent ID: 9140120
Filing Date: 2015-09-22
Classification: E21C,E21F

Abstract:
1. A longwall shearer for cutting material from a mining face, the longwall shearer positioned adjacent a face conveyor for transporting material, the longwall shearer comprising: a chassis including a first end and a second end, the chassis movable in at least a first direction that is generally parallel to the mining face; an arm pivotably coupled to the chassis; a cutting drum for engaging the mining face, the cutting drum rotatably supported on the arm and rotatable about a drum axis; and a lump breaker for engaging material on the face conveyor, the lump breaker including a breaker arm having a first end and a second end, the first end pivotably coupled to the chassis about an arm axis parallel to the drum axis, the breaker arm further including a planar surface extending between the first end and the second end, the breaker arm further including a plurality of teeth for breaking apart the cut material, the teeth supported on the planar surface and aligned linearly in a plane perpendicular to the arm axis.