Abstract: Embodiments provide a helical cutting tool and a helical cutting bit that may be utilized to cut various materials. The helical cutting bit and cutting tool include a variety of features to increase the efficiency of the cutting tool during cutting operations.

Abstract: Embodiments provide various saw chain links which may be combined to form a utility saw chain. In various other embodiments, cutting system fixtures are disclosed which may facilitate the cutting of pipes and other materials from an axis point.

Abstract: A saw chain for a saw is disclosed. Embodiments include a drive link that may be used in a saw chain, wherein the drive link includes a tail and a concavity that complements a depth gauge of a trailing cutting link, reducing and/or minimizing the drive link's protrusion into a gullet space of the cutting link. Embodiments of the invention may help improve cutting performance and further help reduce kickback potential.

Abstract: A hard-faced cutting blade and hard-facing method is provided. A hard-facing material is applied to a cutting edge of a cutting blade such that a heat-affected transition zone may be created between the base metal and the hard-facing material. The heat-affected transition zone may create a sufficient bond to help resist delamination and flaking of the hard-facing material from the base metal.

Abstract: A saw chain rivet is provided including a flange, and a hub extending from a side of the flange. A shoulder defined by a junction between the hub and the flange has properties optimized to resist shear forces. The hub may be optimized for ease of rivet head formation.

Abstract: A saw chain rivet is provided including a flange, and a hub extending from a side of the flange. A shoulder defined by a junction between the hub and the flange has properties optimized to resist shear forces. The hub may be optimized for ease of rivet head formation.

Abstract: In various embodiments, a saw chain is provided that includes a rail engaging link that has an offset footprint within the link itself and/or with respect to other links in the chain that are adapted to ride on the same rail. Saw chains as provided may be used in a variety of applications, including but not limited to wood cutting and aggregate cutting applications.

Abstract: Embodiments of the invention disclose a cutter link adapted to move in a cutting direction along a guide rail of a guide bar. The cutter link includes a cutting portion that tapers from a leading portion adjacent a sharpened edge to a trailing portion rearward of the leading.

Abstract: A tree felling head including a gathering arm and a bunching finger. In various embodiments the bunching finger may include inner and outer arms pivotally coupled together with the inner arm also pivotally coupled to a frame portion of the felling head. A biasing member, e.g. a compression spring, urges pivotal movements of the inner arm toward (and/or away from) the accumulation area of the felling head. An actuator connected to the outer arm reciprocally helps urges movement of the finger into and out of the accumulation area of the felling head. In various embodiments, a coupling of the actuator to the outer arm permits folding pivotal movement between the arms when retraction occurs and a tree inhibits outer sweeping movement of the outer finger. Said folding resulting in withdrawal of the outer finger from behind the inhibiting tree.

Abstract: Embodiments include a drive link that may be used in a saw chain, wherein the drive link includes a tail and a concavity that help improve cutting performance while reducing kickback potential.

Abstract: Embodiments of the disclosure provide a saw chain having cutter links having a cutting edge on a first end and an opposite second end adapted for riding on or along a rail of a guide bar. First drive links are coupled with the cutter links and are adapted to ride in a groove of a guide bar. The first drive links have a clean out tang sized and shaped to scoop debris from within the groove, and have two first drive link side surfaces on opposite sides thereof adapted to have at least occasional wearing contact with interior side walls of the groove. Second drive links are coupled with the first drive links and the cutter links, and are adapted to ride in the groove of the guide bar. Each second drive link has second drive link side surfaces adapted to have at least occasional wearing contact with the interior side walls of the groove. The second drive link side surfaces have a greater surface area than the first drive link side surfaces, and in some embodiments may be featured rudder links.

Abstract: A saw chain is provided that has a plurality of cutter links coupled to an opposing tie strap, where the cutter link has a portion that protrudes past the tie strap to enable pivotal movement of the cutter link toward a central longitudinal axis of a guide bar.

Abstract: A tree delimber including a base frame rotatably supporting a yoke assembly and a cutting head assembly. The yoke assembly is journalled for rotation in a ring bearing on the base frame, adjacent its front end, and supported by a pair of roller units adjacent its rear end. Each roller unit includes a vertically adjustable roller, adjustment being automatically effected by horizontal movement of a wedge driven by a control rod under the influence of fluid pressure in a hydraulic cylinder.

Abstract: A concrete cutting chain saw has heretofore been considered a rugged performing tool demanding high horsepower and unavailable to the homeowner having only single phase electrical power for powering such a tool. This has been addressed and resolved by a balancing of the torque and chain speed to thereby allow for sufficient torque at the lower horsepower capability of single phase power inputs. Chain width and thereby cutting width may also be reduced, as well as the abrasive elements per cutter may be reduced in order to enable the use of low horsepower power heads.

Abstract: A saw chain rivet is provided including a flange, and a hub extending from a side of the flange. A shoulder defined by a junction between the hub and the flange has properties optimized to resist shear forces. The hub may be optimized for ease of rivet head formation.

Abstract: An apparatus is provided for guide bars used in cutting operations, and more particularly to prolonging the life of the nose sprocket and/or reducing the tendency of guide bar separation in the nose sprocket region, by reconfiguring the nose sprocket outer race and/or the cutting chain drive tang.

Abstract: A cutting chain bench grinder includes a self-centering vise that centers the cutting chain on an axis of rotation of the vise base. By centering the cutting chain to intersect the vise base axis of rotation, consistent top plate lengths and hook angles can be ground into left and right-hand cutters on a cutting chain. The vise base may also be adjusted horizontally in and out from the grinder base to align the vise base axis of rotation with the axis of rotation of the grinding wheel. The vise base may also be adjusted vertically relative to the vise base to vertically compensate for grinding wheel wear and to control grinding depth. A light tension spring may be used to bias the grinding head in both grinding and dressing positions. A down angle positioner may also be provided that rotates the cutting chain in the vise around a longitudinal centerline of the cutting chain.

Abstract: Batch casting of rim sprockets for chain saws as particularly applied to larger rim sprockets experience undesired high scrap rate resulting from porosity and chip-out. The solution is to ensure flow of molten steel throughout solidification of the molten steel in the sprocket mold while retaining molten steel portals or gates of a size that permits breakaway of portal stems. Such enhances the cooling rate of the molten steel in the sprocket mold which was found beneficial. The objective of reduced scrap rate is thus accomplished by maintaining a ratio of mass to surface area of the sprockets being cast to no greater than about 4 grams of material to each square inch of surface area and alternatively provide through bores through the rim sprockets which additionally assist in wood chip removal. This design also reduces the material content which reduces the cost and weight of the product.

Abstract: A tree harvesting guide bar adapted for treating stumps with a treatment material as the tree is being harvested is provided, and more particularly a valve arrangement for enabling connection of the guide bar inlet to treatment material sources on a variety of different harvesting machines is disclosed, such that the inlet not connected to the treatment material source does not need to be independently and manually plugged to prevent undesirable outflow.

Abstract: A lightweight guide bar formed from a heavy material, e.g., steel, and having a center section, e.g., a cavity of reduced material and fitted with a lighter weight insert, e.g., aluminum plate. The center section includes a flange to which the aluminum plate is adhered and a spacer lip defines the desired thickness of the adhesive. Adhesive is applied to the desired thickness under the lip and the aluminum plate is abutted against the lip and into contact with the adhesive for adhering of the plate to the flange. In a preferred embodiment, the flange is a continuous web down the center of the center section and insert plates are adhered to each side of the web. Also, preferably the inserts are oval and symmetrical and are selectively mechanically secured to the flanges by rivets.