Abstract: A self-propelled, mobile articulated tramming haulage conveyor system includes a continuous series of individual cascading mined material haulage conveyors located over one or more long continuous chain, conveyor system tramming apparatus or flexible crawlers. For negotiation of corners or bends in a borehole, the frame on which the continuous chain, conveyor system tramming system is mounted is flexible.

Abstract: A wheel mounting assembly for a towed implement which permits vertical movement of a casterwheel, adjustment of the level of the implement above the terrain and also serves to return the implement to the desired height after vertical displacement thereof. The assembly includes a casterwheel, pivotally mounted in a caster bracket, which bracket is pantographically linked to an anchor bracket mounted on the implement. The pantographic linkage includes a height adjusting arm, one end of which is pivotally mounted to the caster bracket and the other end of which is pivotally mounted to the anchor bracket. The pantographic linkage also includes a control arm disposed beneath the height adjusting arm which is likewise pivotally mounted to the caster bracket and also to the rear of the implement in parallel relation to the height adjusting arm so as to form a pantographic linkage between the implement and the caster bracket.