Abstract: A valve lifter guide for internal combustion engines for preventing rotation of the valve lifters. The guide consists of an elongated support which is affixed to an internal combustion engine block, and spaced resilient cantilever supported fingers extending from the support have a free end which engages an orientation flat surface on the valve lifter and prevents valve lifter rotation. The resiliency of the fingers simplifies installation of the guide and assures engagement of the guide fingers with the lifter flat surface. An embodiment includes alignment features to facilitate assembly of the valve push rods.

Abstract: A fixture for positioning internal combustion engine rocker arm pedestals prior to bolting the pedestals to the engine. The fixture is a molded synthetic plastic body having recesses for receiving the rocker arm pedestals and fingers within the recesses maintain the pedestals therein. The fixture also includes positioning surfaces cooperating with engine components to assure proper positioning of the pedestals, and the fixture remains in the engine eliminating the necessity for removing the same after the pedestals are bolted in place.

Abstract: A chain guide for maintaining the tension within roller chains such as used in timing systems for internal combustion engines which directly engages the chain to maintain the proper tension. The chain guide is formed of a polymeric synthetic material reinforced with carbon fiber to prevent contamination of the engine lubricants. The chain guide may be formed as a single one piece synthetic construction, or may consist of a synthetic portion having the wear surface defined thereon and a rigid backing member for support.

Abstract: A rotary polymeric torque transfer device such as a vehicle timing chain sprocket wherein the sprocket comprises a polymeric body having homogeneous teeth and torque is transferred to the body by a metal non-insert drive member which includes an inner portion defining a hub, a central portion for receiving fasteners for mounting the sprocket upon shaft support structure, and the drive member outer portion includes torque drive elements cooperating with shoulders defined on the polymeric body radially spaced from the body axis of rotation whereby the transfer of torque between the drive member and the polymeric body occurs adjacent the body periphery radially spaced from the rotation axis to increase the length of the moment arm and reduce the torque forces transmitted between the drive member and the polymeric body to prevent excessive stress and wear between these components.

Abstract: A linear motion absorber for damping linear movement utilizing a cylinder having a reciprocal piston located therein. The cylinder and piston are molded of synthetic plastic and the piston is of an extended length and a diameter slightly less than the inner diameter of the cylinder as to be self aligning therewith and includes a homogeneous annular lip seal to produce unidirectional sealing. The piston stem or rod is also of a synthetic plastic material and in the rigid stem embodiment homogeneously extends from the piston. The piston rod may also consist of a flexible synthetic strand attached to the piston for transmitting tension forces, and a compression spring within the cylinder acting upon the piston will position the piston to a retracted position. The open end of the cylinder is sealed by a removable cap entirely formed of a synthetic plastic material which may be readily affixed to the cylinder to produce a closed circuit during damping.