Andreas Stihl AG & Co. KG | Date: 2015-03-19
A handheld work apparatus has a housing with a guide bar affixed thereto. A saw chain is driven along the guide bar which defines a central plane. A drive element for the chain is in a sprocket wheel space delimited by a sprocket wheel cover. The cover has a longitudinal edge which delimits the space adjacent to a first side of the saw chain. The longitudinal edge has a length from an entry region to a discharge opening. Over at least 50% of this length, the longitudinal edge is at a distance (L) to the housing. The distance (L) corresponds to the chain width (a). The distance of the longitudinal edge of the cover increases at the discharge opening in the running direction of the first side. The largest distance (b) of the longitudinal edge to the central plane is at least 110% of the smallest distance (c).
Andreas Stihl Ag & Co. Kg | Date: 2015-03-25
A chain for a work implement has lateral connecting members connected to central driving members via studs. The stud has two lateral portions spaced apart from one another by a collar. A driving member is mounted pivotably on the collar. At the collar the stud has a surface layer harder than the base material. For a high chain service life, the stud has a diffusion layer above a surface layer above the base material. To produce the stud, the stud is provided with a diffusion layer at least at the collar, and a surface region of the collar is hardened, such that a surface layer is formed between the diffusion layer and the base material of the stud. For a method for producing a driving member, the driving member is provided with a diffusion layer at least at a circumferential surface of a hole and the driving member is hardened.
Andreas Stihl AG & Co. KG | Date: 2015-02-19
A handle for a work apparatus has an actuation member for controlling the rpm of a drive motor of the work apparatus. The actuation member is mounted in the handle and has a pressure surface for the fingers of a user hand. In an initial position, the actuation member protrudes with its pressure surface beyond the grip surface of the handle and, in a position for continuous operation of the motor, has dipped into the grip surface so that the pressure surface of the actuation member lies at the level of the grip surface. A recess extends in the longitudinal direction of the handle and is formed in the grip surface. The recess overlaps the pressure surface of the actuation member so that the actuation member is displaced into the handle via the recess to a boost position whereat the pressure surface lies within the grip surface.
Andreas Stihl AG & Co. KG | Date: 2015-02-27
A hand-held power tool has a device housing having a battery pack compartment. An electric drive motor is arranged in the device housing. An output for driving a working tool is connected to the electric drive motor and arranged in the device housing. A battery pack is arranged in the battery pack compartment and is substantially received completely in the battery pack compartment. At least one grip for guiding the power tool is provided. The device housing has a housing volume and the battery pack compartment has a compartment volume located inside the device housing. A ratio of the housing volume to the compartment volume is approximately 1.5 to maximally approximately 5.
Andreas Stihl AG & Co. KG | Date: 2015-10-05
A handheld work apparatus has a drive motor which drives a tool of the work apparatus. A lubricating arrangement is provided for the tool. The lubricating arrangement includes a lubricant piece that is solid at 20 C. The work apparatus has a melting chamber into which the lubricant piece projects and which is connected to the tool via at least one lubricant channel. The melting chamber is delimited at least partially by a heat conducting element which is heated during operation of the work apparatus.