Abstract: A vibration isolating mount for use with a vibratory pile driver and extractor is comprised of a pair of identical plates that are spaced from each and are interconnected by a polyether-based urethane center member. Each of the plates are provided with pluralities of attachment holes for attaching the vibration isolating mount between an exciter and a suspension housing of a vibratory pile driver and extractor. Each of the plates is also provided with pluralities of lug holes that are filled with the polyether-based urethane of the center member and provide a mechanical connection between the plates and the center member in addition to a chemical bond adhering the plates to the center member.

Abstract: A replaceable pipe liner assembly for a pipe assembly used to dispense abrasive materials has a plurality of tubular liner sections positioned in end-to-end engagement along the length of straight pipe sections of the pipe assembly, and further includes T-shaped liner sections for lining T fittings of the pipe assembly. The tubular liner sections and T-shaped liner sections are easily replaceable, and each is of molded, one-piece, construction, and of resilient abrasive resistant material such as polyurethane. The tubular liner sections interfit in end-to-end engagement to axially align the sections and present a smooth inner liner wall.