Abstract: A manually guided implement having a tool and a brake mechanism for the tool. The brake mechanism includes a brake band that is looped about a brake drum. The brake band and the brake drum form abrasion partners that cooperate with one another during a braking process. At least one of the abrasion partners has a coating. The coating is provided with diamond particles that are embedded in a matrix that contains nickel. The coating is effected in a nickel bath in which the diamond particles are dispersed.

Abstract: A manually guided implement having a tool and a brake mechanism for the tool. The brake mechanism includes a brake band that is looped about a brake drum. The brake band and the brake drum form abrasion partners that cooperate with one another during a braking process. At least one of the abrasion partners has a coating. The coating is provided with diamond particles that are embedded in a matrix that contains nickel. The coating is effected in a nickel bath in which the diamond particles are dispersed.

Abstract: An implement having a drive motor and a tool is provided. A drive shaft is mounted in a guide tube and interconnects the drive motor and tool for rotatingly driving the tool. The drive shaft includes a main member in the form of a hollow shaft having ends on which are disposed respective extensions that form a coupling connection for a positive engagement with coupling components of the drive motor and of the tool.

Abstract: An implement having a drive motor and a tool is provided. A drive shaft is mounted in a guide tube and interconnects the drive motor and tool for rotatingly driving the tool. The drive shaft includes a main member in the form of a hollow shaft having ends on which are disposed respective extensions that form a coupling connection for a positive engagement with coupling components of the drive motor and of the tool.

Abstract: The disclosure describes a support handle located in the plane of a motor-driven chain saw that also includes or is near the center of gravity of the saw so as to be a "support" handle for lifting and manipulating the chain saw. The support handle is reinforced with a profiled insert of a predetermined cross-sectional configuration to distribute vibrations and other internally generally forces so they are not magnified to deform the handle. The insert has a wedge-shaped end to fit within a bend of the support handle without bending the insert.

Abstract: The guide bar for a motor-driven chain saw is provided for taking highest loading and is therefore made of solid material. For weight reduction, openings are provided in the guide bar which are closed off by cover plates that are flush with the flat sides of the guide bar. The cover plates are firmly joined to the base plate of the guide bar. By means of the hollow spaces inside the guide bar, a considerable weight reduction is attained, yet the stability of the guide bar is not substantially impaired as compared to a solid guide bar, since the hollow spaces are located in the zone that is neutral in terms of bending.

Abstract: A cobalt base alloy includes the alloy elements of nickel, chromium, tungsten, silicon and carbon with the nickel content being at least 25 percent by weight. The cobalt base alloy is applied as a coating material for guide bars of saw chains. The alloy has a high hardness with low brittleness by means of which an improved resistance to wear is achieved.

Abstract: A guide bar for a chain saw includes three layers. The two outer layers are defined by side plates which can be welded together by means of inserts and the intermediate member located therebetween is held in a form-tight manner by means of the inserts that are welded to the side plates. Because of this configuration, the intermediate member may be made of plastic or aluminum thereby reducing the weight of the chain saw. The guide bar with this sandwich configuration has excellent strength and has a weight less than conventional guide bars of comparable size.