Abstract: An actuator having one or more pistons. The piston has a rack formed in a skirt of the piston, with the rack recessed within the skirt of the piston in a groove formed between a top lip and a bottom lip. The gear, also called a pinion, engages the rack between the top lip and the bottom lip. As the rack traverses the gear, the shaft that extends through the gear is rotated. The top lip and bottom lip, and the recessed rack that is present within the skirt of the piston adds strength to the piston where the piston engages the gear. The top lip and the bottom lip assist in maintaining alignment of the rack with the gear so that the rack and gear properly mesh.

Abstract: A fitting comprising a filter that is used inline in a compressed air supply system. The present invention comprises a fitting body that is adapted to connect to a fitting of a compressed air supply line. A filter element is placed inside of the fitting body. An end of the filter element is closed. The closed end is upstream of the supply of compressed air from an opposite end of the filter element. The filter element removes dirt and particulate materials that are transported through the air supply line to, for example, an air tool.