| 摘要 |
A device (3) for creating a negative pressure inside a screw holding mouthpiece (4) of a power screw driver (1), including an ejector assembly (15, 16, 17, 18) having a negative pressure chamber (16) which is arranged to be connected to the mouthpiece (4). The device (3) is comprised of an integral unit which includes the ejector assembly (15, 16, 17, 18) and, on an extreme end side (8), is provided with the mouthpiece (4), and is adapted to adjoin to a casing (2) of said power screw driver (1). The invention also concerns a power screw driver. |
