Abstract: A conveyor chain includes a plurality of chain links connected together in a chain, each including a pair of forward arms having a space therebetween and a rearward arm extending in a rearward direction. The forward arms of one link are configured to receive the rearward arm of an adjacent link to form a continuous chain. The rearward arm of each link extends a distance from the forward arms so that when adjacent links are coupled together, an engagement space is created between the forward arms of the links. The engagement space is configured to receive portions of sprockets that would engage the forward arms of the link for driving the chain.

Abstract: A base member is mounted on the driven element of a mining machine or the like. A bit holder is affixed to the base member in such a way that the bit holder may be readily removed and replaced. The base member and bit holder having cooperating abutment surfaces to sustain much of the resultant cutting forces encountered during operation. A connecting pin is provided to maintain the bit holder in position on the base member. Retaining means are provided for the connecting pin. Such retaining means are located between the ends of the connecting pin so as to lock the connecting pin in position without having to have either the connecting pin or the retaining means extend laterally from the joined bit holder and base member. The connecting pin and its retaining means may readily be removed when it is time to replace the bit holder.