Patent ID: 11865688
Assignee: MAKITA CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 13:
14. An impact tool comprising:
a housing; and
a motor, a tubular tool holder, a clutch, a driving mechanism including a rotation shaft, and a driving mechanism housing region inside the housing, wherein
the tool holder has a distal end on which a bit is mountable,
the driving mechanism is configured to hammer the bit,
the motor and the driving mechanism are configured such that the rotation shaft rotates by a rotation of an output shaft of the motor,
the driving mechanism housing region houses the driving mechanism in a sealed state inside the housing,
the driving mechanism and the driving mechanism housing region are configured to have an air escape path that (i) releases air inside the driving mechanism housing region to outside of the driving mechanism housing region, (ii) includes an axially-extending center hole of the rotation shaft and (iii) has an inlet in an outer peripheral surface of the rotation shaft,
the rotation shaft includes a spline portion,
the clutch is (i) configured to switch an operation mode of the impact tool and (ii) slidably connected to the spline portion, and
the inlet is in the spline portion.