Handheld power tool
AssigneeHusqvarna AB
InventorsPatrik Melin, Albin Hagberg, Göran Landén
Life of this patent
Estimating the term…
Abstract
A sprocket arrangement (5) for a handheld power tool such as a saw, comprising a drive unit configured to rotate a drive shaft and cutting tool configured to be driven by the drive shaft (21) via the sprocket arrangement. The sprocket arrangement (5) comprises a gear (1) and at least one flexible element (6a, 6b) arranged such that the drive shaft (21) in the handheld power tool is resiliently connected to the cutting tool in the handheld power tool. A handheld power tool comprising a drive unit, a drive shaft, driving means, and a sprocket arrangement is also provided.
Claims18
A sprocket arrangement for a chain saw, comprising a drive unit configured to rotate a drive shaft, and a cutting tool configured to be driven by the drive shaft via the sprocket arrangement, wherein the sprocket arrangement comprises:
- a gear;
- a first wear ring disposed proximate to a first side of the gear;
- a second wear ring disposed proximate to a second side of the gear opposite the first wear ring;
- a first resilient ring on the first side of the gear proximate to the first wear ring;
- and
- a second resilient ring on the second side of the gear proximate to the second wear ring, wherein the first and second wear rings have a larger diameter than the first and second resilient rings, and wherein the first and second resilient rings are disposed within an inner periphery of the first and second wear rings, respectively.
A chain saw comprising a drive unit, a drive shaft, a cutting chain, and a sprocket arrangement, the sprocket arrangement comprising:
- a gear;
- a first wear ring disposed proximate to a first side of the gear;
- a second wear ring disposed proximate to a second side of the gear opposite the first wear ring;
- a first resilient ring on the first side of the gear proximate to the first wear ring;
- and
- a second resilient ring on the second side of the gear proximate to the second wear ring, wherein the first and second wear rings have a larger diameter than the first and second resilient rings, and wherein the first and second resilient rings are disposed within an inner periphery of the first and second wear rings, respectively.
Dependencies are inferred from the claim text.