Abstract: A hammer of the type having an impact tool driven by pressurized fluid has a hammer body portion with a closed rearward end and an open forward end and a piston longitudinally movably housed within the hammer body portion for striking a tool mounted at the open forward end of the hammer body portion, to thereby impact an object with the tool. The hammer has a fluid valve housed within the closed rearward end of the hammer body portion rearwardly of the piston and in communication with a source of high pressure fluid for driving the piston. The fluid valve has a valve body portion defining an interior chamber and a continuous exterior side wall, and a longitudinal opening in communication with the interior chamber. The valve body has a first body portion and second body portion which is identical to the first body portion and positioned longitudinally in relation thereto within the closed rearward end of the hammer body portion.

Abstract: A reversible rotary sanding power tool of the high speed, hand-held type includes a tool body, a tool head rotatably mounted on the tool body and adapted for replaceably retaining an abrasive disk, and a reversible, high-speed motor within the tool body and to which the tool head is rotatably coupled so as not to become accidentally disengaged upon operation of the power tool in either of the normal or reverse modes of operation.