Power tool including a reservoir and a cap attached to the opening of the reservoir

摘要

A power tool that includes a reservoir that holds oil and a cap attached to the reservoir. The cap may include a cap body having a communicating path and a valve member covering the communicating path. The valve member may include an elastic part that has a projecting part, which projects from the elastic part and includes a slit. The elastic part and the projecting part being configured to deform to the inner surface side such that the slit of the projecting part opens if the pressure outside the reservoir becomes higher than the pressure inside the reservoir and a difference between the pressure inside the reservoir and the pressure outside the reservoir exceeds a predetermined value. The elastic part and the projecting part also being configured to deform to the outer side surface such that the slit of the projecting part opens if the pressure inside the reservoir becomes higher than the pressure outside the reservoir.