Patent ID: 11904447
Assignee: MAKITA CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 10:
11. A driving tool, comprising:
a piston configured to move in a driving direction by a pressure of a gas;
a driver that (i) extends from the piston in the driving direction and (ii) comprises a plurality of engaged portions spaced along the driving direction; and
a lift mechanism configured to move the driver and the piston in a direction opposite to the driving direction, wherein:
the lift mechanism comprises:
a rotation shaft having a first axis of rotation;
a wheel (i) configured to rotate integrally with the rotation shaft, (ii) having a second axis of rotation and (iii) including
a plurality of engaging portions (a) spaced along a periphery of the wheel and (b) configured to engage the plurality of engaged portions; and
a biasing member (i) having a biasing force and (ii) that is in the wheel;

the driver and the lift mechanism are configured such that (i) the wheel can move relative to the rotation shaft in a radial direction from the first axis of rotation and (ii) for part of the movement when the driver is moving in the direction opposite to the driving direction, the first axis of rotation and the second axis of rotation are offset and parallel; and
the biasing member is configured to apply an entirety of the biasing force on the wheel in a direction in which the second axis of rotation moves toward the first axis of rotation.