Abstract: A vibratory impact hammer including a hammer body assemblage suspended by rubber mounts for reciprocal axial movement in a support frame, the rubber mounts providing guiding and damping action of the assemblage in either director of axial movement without extraneous friction forces acting thereupon, and a pair of synchronously driven eccentric weights which are arranged to provide vibratory movement of the assemblage.

Abstract: A support for maintaining concrete reinforcement at a pre-determined level during the pouring of concrete there around comprises an assembly of at least a pair of adjacent inverted `U` shaped metal yokes 10. Each yoke comprises a pair of spaced substantially parallel limbs 12 interconnected by a bridge element 14 and adjacent limbs of adjacent yokes of the assembly are frictionally connected together by intermediate couplings 16 and foot connectors 18 whereby the angle between adjacent yokes may be initially pre-selected and thereafter frictionally maintained.

Abstract: An adaptor for use in driving a pipe into the ground by a ground piercing tool, which adaptor is arranged to be driven by the piercing tool. The adaptor consists of a three piece cylindrical unit held together by two garter springs. A tapered conical bore, formed in the adaptor, has a slope comparable with the slope formed on the forward end of a ground piercing tool used therewith. A portion of the adaptor is arranged to enter the end region of a pipe being worked upon, and a circumferential shoulder is formed on the adaptor, for engagement with the end of the pipe. Impact action upon the piercing tool not only wedges the adaptor into tight engagement with the inner region of the pipe, but also results in driving action upon the pipe by reason of the circumferential shoulder being in engagement with the pipe end.

Abstract: A road surface removing machine including a modular assemblage, having a rotary cutter drum unit with flailing arms adapted to impact upon a road surface for disintegration of the surface, said drum unit having four degrees of movement, boom means associated with a rail means assemblage for operative movement of the cutter drum, outrigger means for stabilizing the machine, a vacuum operated system for picking up disintegrated road surface debris and depositing it in a separation bin, and an hydraulic circuitry for operation of the components of the machine.

Abstract: The invention pertains to apparatus for inflating tubeless tires, particularly of large sizes, wherein the tire is quickly inflated, and a variety of wheel widths may be readily accommodated. A wheel and uninflated tire are located within the path of movement of an inflation head which includes an annular wheel rim seal ring which is brought into sealing engagement with the wheel rim. Thereafter, a tire sidewall engaging seal ring also mounted upon the inflation head compresses the tire sidewall under the influence of an expansible air bag motor to displace the tire bead from a sealing relationship with the wheel flange, and the sidewall engaging ring forms an annular compressed air receiving chamber with the wheel rim ring permitting compressed air to enter the tire throughout the displaced tire bead periphery.

Abstract: An air hammer having a main body including an elongated cavity with a ram slidably mounted therein. The ram is driven by compressed air delivered through inlet means to the cavity in such a way as to drive the ram up and down to impact a tool. Exhaust from the hammer is directed into a plurality of elongated expansion chambers which are positioned within the body of the hammer. The expansion chambers extend to each end of the hammer body and exhaust to the atmosphere through open ports. Inserts are placed within the elongated expansion chambers to divide the chambers into properly sized cavities for greatest sound attenuation. Holes extend through these inserts for the eventual passage of exhausting air therethrough. The inserts are of neoprene having a durometer hardness of from 75 to 90. The size of the expansion chambers and the configuration and positioning of the inserts are intended to provide a muffling of the noise and shock of the exhaust.