Abstract: Several embodiments of a drive pin retention system for mining chains comprise a drive pin, dowel pin, and retainer, wherein the dowel pin is fitted through the holes of a retainer aligned with the holes of the dowel pin and pressed with force so that the tolerance between the dowel pin and retainer is very close. In one embodiment, the retainer is tack welded and then the dowel pin is tack welded to further increase the tolerance and prevent loosening or movement of the retainer due to vibration.

Abstract: An improved drive pin retention system for mining chains is disclosed, including several embodiments. The drive pin retention system further decreases the chance that the chain can break due to sheared dowel pins.

Abstract: An improved drive pin retention system for mining chains is disclosed, including several embodiments. The drive pin retention system further decreases the chance that the chain can break due to sheared dowel pins.

Abstract: An improved drive pin retention system for mining chains is disclosed, including several embodiments. The drive pin retention system further decreases the chance that the chain can break due to sheared dowel pins.

Abstract: We disclose herein a wire guard that is used to keep wire and other debris from wrapping around the axles of landfill trash compactors, thereby reducing the chance of damage to these axles and sealing systems. The wire guard is comprised of multiple segments that are individually welded to the edge of the wheel wrapper. The individual segments are through hardened and are, therefore, resistant to wear. Furthermore, they may include an overhanging lip that protects the edge of the wheel wrapper. This device is an improvement to other existing wire guards.