Abstract: Disclosed herein is a chain saw comprising an elongated cutter bar having, at the outer edges thereof, laterally spaced side rails, together with a curved end portion including laterally spaced side plates and a journalled idler wheel with a peripheral outer surface extending between the side plates and having a plurality of spaced outwardly extending lobes, and an endless saw chain trained around the cutter bar and having pivotally connected side and center links, each of the side links having a bottom surface, which during semicircular traversal of the curved end portion engages one of the side rails to provide partial support for the chain traversing the curved end portion, each of the center links having a lower portion which includes a forward edge extending downwardly between the side rails with at least one of the forward edges being in contact with one of the lobes to insure rotation of the idler wheel during chain traversal of the curved end portion, each of the center link lower portions also having

Abstract: Disclosed herein is a chain saw comprising a chain sprocket rotatably supported by a frame and driven by an engine supported by the frame, a sprocket guard supported from the frame, a cutter bar having an end supported between the frame and the sprocket guard in spaced relation from the sprocket, together with a first guide plate supported between the frame and the cutter bar and including a main part, and a guide portion extending from the main part and including a first part extending in generally parallel and laterally outwardly offset relation with respect to the cutter bar and a second part diverging laterally outwardly from the first part, and a second guide plate supported between the sprocket guard and the cutter bar and including a main part, and a guide portion extending from the second guide plate main part and including a first part extending in generally parallel and laterally outwardly offset relation with respect to the cutter bar, and a second part diverging laterally outwardly from the first

Abstract: Disclosed herein is a saw chain including a center link having a trailing portion pivotally connected between the leading portions of an opposed pair of side links, one of which is a cutting link having a cutting tooth and a depth gauge. The center link includes an upwardly projecting tang which is located in laterally adjacent relation with the depth gauge and extends in the direction of the cutting tooth beyond a plane extending vertically from the axis of the pivotal connection between the trailing portion of the center link and the leading portions of the side links. During travel around the nose portion of the cutter bar, an outer corner of the tang projects outwardly beyond the uppermost edge of the depth gauge, i.e. overrides the depth gauge, and rides in the bottom of the saw kerf to limit the depth of cut made by the cutting tooth.