Abstract: A portable sawmill with bi-directional cutting circular saws includes a saw support pivotally mounted to a primary support structure for pivotal movement about a pivot axis which is transverse to the direction of movement. Two circular saws are rotatably mounted one above the other on the saw support. A first one of the two circular saws rotates in a first rotational direction and a second one of the two circular saws rotates in a second rotational direction. The teeth on both of the two circular saws are always moving toward a log resting on the log support as the log is being cut. An actuator is provided for selectively pivoting the saw support to invert the positioning of the two circular saws so that the teeth on both of the two circular saws continue to move toward the log being cut upon a change in direction occurring.

Abstract: An apparatus having a mounting body, a support having a first end and a second end. The first end of the support being pivotally secured to the mounting body for pivotal movement about a substantially horizontal primary pivot axis. A rail grooming head mounted to the second end of the support.

Abstract: An apparatus having a mounting body, a support having a first end and a second end. The first end of the support being pivotally secured to the mounting body for pivotal movement about a substantially horizontal primary pivot axis. A rail grooming head mounted to the second end of the support.

Abstract: A ring saw is described which has a novel construction for centering the cutting ring. The ring saw is characterized by a groove in the inner annular surface of the cutting ring. A plurality of rollers are provided which engage the groove in the inner annular surface. The rollers serve to center the cutting ring relative to the saw body while withstanding axial and radial loads placed upon the cutting ring. The construction, as described, serves to increase the capacity of the cutting ring to withstand radial and axial loading.

Abstract: A guiding guard assembly for a crawler track vehicle is relatively easy to install initially as a "retrofit kit", and can also be easily removed and replaced as needed. Furthermore, the guiding guard does not obstruct idler bearings of the lower run of the track, thus permitting easy servicing. A plurality of transverse supports are secured to the vehicle and disposed transversely of each crawler track and spaced longitudinally apart. Structure for locating a guiding guard member on each side of each crawler track relative to the transverse supports is provided so that a lower face of each guiding guard member is spaced closely to a lower run of each crawler track to resist excessive twisting of the track. Support portions secured to the transverse supports and guard portions secured to the guiding guard members having inclined locating surfaces which cooperate with each other to prevent relative movement between the guiding guard member and the supports when secured together.

Abstract: A system is provided for installing, retaining and replacing the saw-teeth strip inserts of rotatable, cylindrical feedrolls, without concomitant damage thereto. More specifically, a plurality of circumferentially spaced, longitudinally extending grooves are formed in the body of the feedroll. Each groove is adapted to receive a pair of spaced, parallel saw-teeth strip inserts and maintain them at a predetermined position therein. A wedge is insertable into the groove between the inserts. The wedge is adapted to abut the lower portion of the inserts to clamp them against the groove side walls. A plurality of fasteners, such as allen head screws, are inserted through spaced, aligned bores formed in the wedge and are secured in the groove floor. The fasteners function to releasably secure the saw-teeth strips and wedge within the groove.