Andreas Stihl Ag Co. Kg

Andreas Stihl Ag & Co.

Florian Von Krane

Klaus-Martin Uhl

Joachim Hoffmann

Thomas Stark

Reinhard Friedrich

Christian Barth

Cornelius Gindele

Markus Zwimpfer

Kirsten Schellin

Jürgen Steinhauser

Steffen Rögele

A backpack power tool has drive motor and blower mounted on a backpack frame. The bottom plate of the backpack frame has a passage for working air sucked in by the blower. Ribs on the bottom side of the bottom plate have end faces forming a contact surface for leaves aspirated in blower operation against the bottom plate. The bottom plate has intake openings positioned between the end faces of the ribs in the contact surface and fluidically connected to the passage. Working air is sucked in through the intake openings and the passage. The bottom plate has an intake surface that is the sum of surfaces of all intake openings and of all end faces of ribs with a width of less than 10 mm positioned between the intake openings. The intake surface amounts to at least 50% of the surface of the bottom side of the bottom plate.

Backpack power tool with a drive motor and a blower driven by the drive motor

A hand-held working implement comprises an internal combustion engine, an air filter, and an intermediate flange, wherein the intermediate flange is arranged between the air filter and the internal combustion engine, wherein the bottom of the intermediate flange is arranged opposite the air filter bottom, wherein the air filter bottom and the intermediate flange bound an interior space, wherein the interior space comprises a portion of the duct, wherein a portion of the duct in the interior space is bounded by at least one boundary wall which protrudes into the interior space transversely with respect to the air filter bottom, wherein the boundary wall is formed integrally on the intermediate flange and/or on the air filter bottom, and wherein the boundary wall bridges the spacing between the air filter bottom and the bottom of the intermediate flange.

Hand-held work implement having an internal combustion engine and an air filter

A carburetor arrangement for a two-stroke engine () is for a portable handheld work apparatus such as a motor-driven chain saw, cutoff machine or the like and has an intake channel (). The intake channel () is partitioned by a partition wall () into an air channel () and a mixture channel (). A fuel opening () for supplying fuel to the two-stroke engine () opens into the mixture channel (). The carburetor arrangement has a carburetor () having a carburetor housing () wherein an intake channel section () is formed. A throttle flap () is pivotally journalled in the carburetor housing (). A good partitioning of the air channel () from the mixture channel () results with a simple manufacture of the carburetor () when a partition wall section () is configured as a separate component upstream of the throttle flap () and is held in the intake channel ().

Carburetor arrangement

A support device () is for supporting a portable handheld work apparatus including an overhead branch cutter (). The support device () is held to the body of the operator () via a belt arrangement (). The support device () includes a cup () which has support straps () which are fixed to the cup (). The free ends of the support straps () can be coupled to the belt arrangement ().

Support device for supporting an overhead branch cutter

Growing community of inventors

Kirchberg, Germany

Florian Von Krane