Molding and emblem removal tool

Abstract

A pneumatic scraping tool includes a pneumatic hammer assembly including a cylinder in which a piston reciprocates for repeated impact against an anvil or blade holder which is rotatably received within an end of the cylinder and carries a scraping blade. The anvil has an annular flange which stops its insertion in the cylinder, and is retained in place by a nut threadedly engaged with the cylinder and having an end wall spaced from the cylinder end a distance slightly greater than the flange thickness to permit reciprocation of the anvil. Exhaust air passes along a groove in the outer surface of the cylinder to an annular chamber in the nut and thence through four exhaust ports exiting at the end wall of the nut. A plug portion of the anvil projects through a central opening in the nut end wall and is received into a socket in a blade housing. Blade fingers project laterally into the socket. Alternating side grooves and flats on the plug portion allow the blade assembly to be rotated roughly one-quarter turn between a latched condition and a release condition in which the plug portion can be inserted into and removed from the socket. A spring-biased detent ball in the cylinder engages a square inner end of the anvil to form a ratchet, accommodating rotation of the anvil in only one direction.