Hand-held power tool with a pneumatic percussion mechanism
AssigneeHilti Aktingesellschaft
InventorJosef Fuenfer
Life of this patent
Estimating the term…
Abstract
A hand-held power tool includes a pneumatic percussion mechanism (20) having a driving member (22) reciprocating in the guide tube (21), a percussion member (23) driven by the driving member (22), and an air spring (24) located between the driving member (22) and the percussion member (23) for transmitting a reciprocating movement of the driving member (22) to the percussion member (23), and a motor-driven elongate swashplate member (29) for reciprocating the driving member (22) a displacement stroke of which is adjusted by an adjusting member (31) displaceable along a longitudinal extent of a swashplate member (29) for steplessly adjusting a swashplate angle that determines the displacement stroke of the driving member (22).
Claims10
A hand-held power tool, comprising:
- a pneumatic percussion mechanism (20) defining a central percussion axis (S) and having a guide tube (21), a driving member (22) reciprocating in the guide tube (21), a percussion member (23) driven by the driving member (22), and an air spring (24) located between the driving member (22) and the percussion member (23) for transmitting a reciprocating movement of the driving member (22) to the percussion member (23);
- a motor (12) for driving the percussion mechanism (20);
- a motor-driven elongate swashplate member (29) for reciprocating the driving member (22);
- and
- an adjustment device (30) for adjusting a displacement stroke of the driving member (22) and including an adjusting member (31) displaceable along a longitudinal extent of the swashplate member (29) for steplessly adjusting a swashplate angle that determines the displacement stroke of the driving member (22).
Dependencies are inferred from the claim text.