Patent ID: 7410009

Claim:
A power tool comprising: a power tool body, a tool bit coupled to the power tool body, the tool bit performing a predetermined operation to a workpiece, a driving mechanism that drives the tool bit, an accommodating space disposed in the power tool body, wherein the accommodating space is hermetically sealed and houses the driving mechanism, a lubricant filled within the accommodating space to lubricate the driving mechanism, a passage via which an inside and an outside of the accommodating space communicate with each other, wherein, the passage has an accommodating space side opening that is open to the inside of the accommodating space and an outside opening that is open to the outside of the accommodating space, the passage being configured to extend, starting from the accommodating space side opening, in a direction away from the outside opening, then turns around and extend toward the outside opening and, a lubricant leakage preventing region provided within the passage, the region preventing the lubricant from leaking from the inside to the outside of the accommodating space.