A novel saw chain, including a plurality of transmission pieces, a plurality of rebound transmission pieces, a plurality of cutters, a plurality of connecting pieces, and a plurality of pin shafts. The product of the average pitch between every two adjacent pin shafts in the saw chain, the maximum height of the saw chain, and the maximum thickness of the saw chain is 150-275 mm3. According to the novel saw chain, the size of the saw chain is reduced, energy consumption of the saw chain is effectively reduced, and the standby time of a lithium battery or a gasoline engine is effectively prolonged.

A saw chain includes connecting links and drive links that are mutually connected by rivets in an articulated manner about rivet axes. The rivets project through at least one rivet opening of one connecting link and through a rivet opening of a drive link. At least one rivet has, on one end face thereof, a depression having a depression edge and a depression base surrounded by the depression edge. The distance of the depression edge from a central plane of the saw chain increases at an increasing radial distance from the rivet axis. The distance (e) of the base from the central plane does not increase at any point of the base at an increasing radial distance from the rivet axis. A greatest distance (a) of the base from the rivet axis corresponds to 50% to 100% of half the core diameter (d) of the rivet.

A saw chain includes connecting links and drive links that are mutually connected by rivets in an articulated manner about rivet axes. The rivets project through at least one rivet opening of one connecting link and through a rivet opening of a drive link. At least one rivet has, on one end face thereof, a depression having a depression edge and a depression base surrounded by the depression edge. The distance of the depression edge from a central plane of the saw chain increases at an increasing radial distance from the rivet axis. The distance (e) of the base from the central plane does not increase at any point of the base at an increasing radial distance from the rivet axis. A greatest distance (a) of the base from the rivet axis corresponds to 50% to 100% of half the core diameter (d) of the rivet.

A method of manufacturing a chain link (8) of an abrasion cutting chain comprises: providing a metal blank with outer contours of the chain link (8) and rivet holes (14); and providing a ring (15) of a seal material by injection-molding of seal material around at least one rivet hole (14). The method further comprises providing a transfer channel (16) in the metal blank adjacent to at least one of the rivet holes (14). The seal material flows via the transfer channel (16) into at least one cavity portion of an injection mold assembly to form at least one rings (15) of seal material. An abrasion chain link comprises at least one rivet hole (14). A transfer channel (16) is provided next to the rivet hole (14).

A high-efficiency saw chain, including a plurality of transmission pieces, a plurality of rebound transmission pieces, a plurality of cutters, a plurality of connecting pieces and a plurality of pin shafts. The product of the average pitch between two adjacent pin shafts in the saw chain, the maximum height of the saw chain and the maximum thickness of the saw chain is 406 to 450 mm3. The high-efficiency saw chain may reduce the volume of the saw chain, reduce the size of the saw chain, effectively reduce the energy consumption of the saw chain, and effectively prolong the battery life of a lithium battery or gasoline engine.

Improved chain saws, components for chain saws, methods of making chain saws and components, and methods of using chain saws and components are disclosed. In some embodiments, a chain saw comprises a saw bar and a plurality of links, wherein a first link has a hook that engages a recess of a second link, thereby coupling the first link and the second link and allowing them to articulate without decoupling. The saw bar may have a rail, and the links may have grooves such that the links straddle and ride over the rail. The rail may have a projection and the grooves of the links may have notches accommodating the projection such that the projection prevents dislocation of the links. The links may have conical or pyramidal cutting teeth. The chain may be bidirectional. Robotic and automated operation of saws and other instruments are also disclosed.

An assembly for cutting foam, nonwoven, rubber, and composite products has a guide having a longitudinally extending guide edge formed with a longitudinally extending and outwardly open groove. A longitudinally extending row of cutting elements extends along the guide edge, and element each has an entrainment dog projecting inward into the groove, a support riding on the guide edge and having sides each formed with a pair of longitudinally spaced and outwardly open recesses, a base outward of the support, and a wedge-section cutting tooth forming a cutting edge outside the base and having a pair of longitudinally extending flanks converging at the cutting edge. Coupling links extend between and have ends set in the recesses of adjacent cutting elements. Pivot pins extend through the ends of the links and through the supports at the bases. The base is of a maximum width greater than a width of the assembly at the pins.

A cutting link, a saw chain and a chainsaw apparatus having the same, and a method for manufacturing the same. The cutting link includes: a body; a depth gauge protruding upwardly from a top side of the body; and a cutting portion protruding upwardly from the top side of the body and located at rearward side of the depth gauge, wherein the cutting portion includes a cutting edge, a rake face adjacent to the cutting edge, and a clearance face adjacent to the cutting edge, and wherein the cutting portion has one or more hardened areas including a first surface hardened area which covers at least the rake face, with other areas of the cutting link being non-surface hardened areas. The chain is a single use chain with predictable long life and economical use, and capable of minimizing the risk of chain shot.

A saw chain includes connecting links and drive links that are mutually connected by rivets in an articulated manner about rivet axes. The rivets project through at least one rivet opening of one connecting link and through a rivet opening of a drive link. At least one rivet has, on one end face thereof, a depression having a depression edge and a depression base surrounded by the depression edge. The distance of the depression edge from a central plane of the saw chain increases at an increasing radial distance from the rivet axis. The distance (e) of the base from the central plane does not increase at any point of the base at an increasing radial distance from the rivet axis. A greatest distance (a) of the base from the rivet axis corresponds to 50% to 100% of half the core diameter (d) of the rivet.

A cutting link, a saw chain and a chainsaw apparatus having the same, and a method for manufacturing the same. The cutting link includes: a body; a depth gauge protruding upwardly from a top side of the body; and a cutting portion protruding upwardly from the top side of the body and located at rearward side of the depth gauge, wherein the cutting portion includes a cutting edge, a rake face adjacent to the cutting edge, and a clearance face adjacent to the cutting edge, and wherein the cutting portion has one or more hardened areas including a first surface hardened area which covers at least the rake face, with other areas of the cutting link being non-surface hardened areas. The chain is a single use chain with predictable long life and economical use, and capable of minimizing the risk of chain shot.