Abstract: An attachment for a chain saw (100) includes two elongated members (4D) mountable on the opposite faces of the chain guide (102). Each member (4D) has an elongated center portion (6D) configured to be secured to the chain guide (102) in a position closely adjacent to the corresponding face thereof. An angled portion (30) extends laterally outwardly from the outer edge of the center portion (6D). A plurality of spaced apart teeth (12D) project from the angled portion (30) substantially parallel to the chain guide (102) over and beyond the chain (104). Each tooth (12D) has, on an upstream edge thereof, a surface (18D) angled laterally outwardly in an upstream direction to help retain the chain on a path around the periphery of the chain guide (102). The angled surface (18D) is preferably formed by bending the edge of a substantially flat tooth.

Abstract: First and second elongated members are mounted on the opposite faces of a chain guide of a conventional chain saw. Each member has an elongated center portion with a rib extending therealong. A plurality of spaced apart teeth project from the center portion substantially parallel to the chain guide over and beyond the chain. The rib at least partially abuts the chain guide face to space the teeth laterally away from the chain. Each tooth preferably has an upstream edge angled laterally outwardly to help retain the chain on a path around the periphery of the chain guide. The angled surface may be formed by beveling or by bending an edge of the tooth. The teeth are arranged in opposite pairs. A spacer may be provided extending perpendicularly between tip portions of the teeth to inhibit bending of the teeth toward the chain. The spacer may be a pin or may be formed by bending the tip of the teeth toward each other to form a blunt outer end.