Husqvarna Ab

Anders Hansson

Joakim Persson

Stefan Kullberg

Tomas Wykman

Johan Lönn

Mikael Evergren

Per-Arne Järnland

Patrik Sigurdh

Håkan Fransson

Joakim N Persson

A crankshaft () for a crankcase scavenged two stroke piston engine () is disclosed. The crankshaft () is configured to rotate around a rotation axis (ax) during operation. The crankshaft () comprises a crankpin () configured to move in a crank plane (cp) during operation, and a first and a second counterweight () arranged on either side (S, S) of the crank plane (cp). The first counterweight () has a first outer radius (r) measured from the rotation axis (ax) and the second counterweight () has a second outer radius (r) measured from the rotation axis (ax). The first outer radius (r) is smaller than the second outer radius (r). The present disclosure further relates to a power unit (), a crankcase scavenged two stroke piston engine (), and a hand-held power tool ().

Crankshaft, power unit, two stroke piston engine, and hand-held power tool

A hand-held cutting device () including an elongated member (), a trimmer head (), and a power unit operably coupled to the trimmer head () to selectively cause rotation of the trimmer head (). The trimmer head () includes a line holding assembly () to hold and selectively release trimmer line (), and a housing to house the line holding assembly (), wherein the line holding assembly () includes a core (), a line-release knob (), and a spool () configured to hold the trimmer line (). The knob () is axially movable with respect to the core () between an extended first position and a retracted second position, the knob () extending outwardly from the housing and being non-rotatably fixed to the core () when the knob () is in the first position.

Quick loading trimmer head and trimmer thereto

Herein a blade arrangement () for a hand-held power tool () is disclosed. The blade arrangement () comprises a driving member () configured for being driven to reciprocate along a driving direction (), an elongated cutting blade body (), and a clamping member (). The clamping member () is configured to engage with the driving member () and the elongated cutting blade body () so as to press the driving member () against the elongated cutting blade body () at least partially in the driving direction ().

Blade arrangement for hand-held power tool and clamping member

Adjustment device for automatic adjustment of a spacing between a first and a second cutting blade. The adjustment device includes a connector extending through a recess in the respective first and second cutting blades at right angles to the first and second contact surfaces and arranged to guide the movement of the displaceable cutting blades relative to the other cutting blade. The adjustment device further includes a first stop fixed to one end of the connector and arranged in contact with the outer surface of the second cutting blade, and an adjustment means located at the opposite end of the connector and arranged to apply a pre-tensioning force on the outer surface of the first cutting blade and maintain first and second contact surfaces of the first and second cutting blades in contact.

Arrangement for automatic adjustment of a spacing between cutting blades

The invention relates to a starting device () for an internal combustion engine, the starting device () comprising a hub () configured to drivingly engage an internal combustion engine when the hub () is rotated in a first direction (A); a pulley () interconnected with the hub () by a spring (); a shaft () on which the pulley () and hub () are mounted independently rotatable; a flexible member () attached to and coiled about the pulley (); and where the spring () coupled at a first end () to the hub () and at a second end () to the pulley (). The pulley () comprises a recess () arranged to receive the flexible member (), which recess has the shape of a conical helix having a first end (A) with a first diameter and a second end (B) with a second diameter, larger than the first diameter; and is attached to the pulley () at the second end (B).

Growing community of inventors

Huskvarna, Sweden

Anders Hansson