Hand-held power tool with pneumatic percussion mechanism
AssigneeHilti Aktiengesellschaft
InventorStefan Hammerstingl
Life of this patent
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Abstract
A hand-held power tool for percussively driving a working tool (3) includes a percussion mechanism (4) having a guide tube (5), in which a percussion piston (7) which is driven by an air spring (6), is axially displaceable for applying axial impacts to an anvil (8) that applies axial blows to the working tool (3), and a viscoelastic damping member (9) arranged in the guide tube (5) and engaging in a circumferential radial groove (13) of the anvil (8) and which is axially limited at opposite sides thereof.
Claims5
A hand-held power tool for percussively driving a working tool (3) and including an anvil (8) for applying blows to the working tool (3) and axially displaceable within certain limits;
- a percussion mechanism (4) for axially impacting the anvil (8) and having a guide tube (5), a percussion piston (7) for applying impacts to the anvil (8), and an air spring (6) for driving the percussion piston (7) for applying impacts to the anvil (8);
- and a viscoelastic damping member (9) arranged in the guide tube (5) and engaging in a circumferential radial groove (13) of the anvil (8) and axially limited at opposite sides thereof.
Dependencies are inferred from the claim text.