| 摘要 |
A pneumatic power screwdriver has a removable screw filled magazine operably mounted thereon so that screws therein retained are mechanically dislodged one at a time and pneumatically advanced to a chuck assembly forwardly of the screwdriver head. The screw magazine is rotatably driven by a ratchet wheel so that every time a screw is inserted into a work surface the magazine is rotated by an incremental amount to a position whereby an adjacently positioned screw can be advanced on the next screwing operation. The chuck assembly is mounted on the screwdriver for reciprocating movement so that when it is desired to drive a screw into a work surface, the chuck assembly can retract relative to the body of the screwdriver allowing the screwdriver head to protrude therethrough in workable engagement with the screw retained by the chuck assembly. |
