Abstract: 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.

Abstract: A container for retaining a liquid sample to be tested is closed by a removable closure cap having a slot therein to receive a flat rectangular panel test card member inserted through the slot into the container. A flexible resilient member is mounted adjoining to the closure cap slot and has a slit therein with abutting edges through which the test card is passed. After the test card has been withdrawn, the abutting edges contract to their normally closed position to prevent the leakage of any liquid through the slot when the container is being handled. During withdrawal of the test card through the slot the abutting edges wipe excess liquid sample from the test card.