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US 12,140,214 B2Granted
Composite gearwheel for an electropneumatic hammer drill
AssigneeHilti Aktiengesellschaft
InventorsDaniel Seltmann, Josef Fuenfer
Life of this patent
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Abstract
Composite gearwheel for an electropneumatic hammer drill, wherein the composite gearwheel has a basic body, consisting of a first material, and an encircling toothing, and wherein the encircling toothing is formed, along a first circular arc, by a toothed body of the composite gearwheel, and is formed, along the remaining second circular arc, by the basic body itself, wherein the toothed body consists of a second material that is different than the first material.
Claims18
An electropneumatic hammer drill comprising:
- a composite gearwheel for an electropneumatic hammer drill, the composite gearwheel including:
- a basic body consisting of a first material;
- and
- a toothed body consisting of a second material different from the first material;
- the composite gearwheel having an encircling toothing formed, along a first circular arc, by the toothed body, and formed, along a remaining second circular arc by the basic body;
- wherein the composite gearwheel is installed in a transmission unit of the hammer drill in such a way that only the part of the encircling toothing formed by the toothed body is exposed to an increased torque of an impact mechanism of the hammer drill.
3 more elements
A composite gearwheel for an electropneumatic hammer drill, the composite gearwheel comprising:
- a basic body consisting of a first material;
- and
- a toothed body consisting of a second material different from the first material;
- the composite gearwheel having an encircling toothing formed, along a first circular arc, by the toothed body, and formed, along a remaining second circular arc by the basic body;
- and
- a balancing weight compensating for an imbalance caused by the toothed body.
3 more elements
Dependencies are inferred from the claim text.