SCREW DRIVER WITH VACUUM SCREW PICK-UP FEATURE.

摘要

A power screw driver with a vacuum screw pick-up feature, comprising a housing (10) connected to a vacuum source, a motor driven screw bit (13), a movable nose piece (14) with a screw guiding nozzle (15), and a spring (18) arranged to bias the nose piece (14) towards a forward rest position, wherein the housing (10) is provided with a valve device (23) for adjustment of the suction force generated by the vacuum source and acting on the nose piece (14) so as to prevent the nose piece (24) from being retracted by a suction force that dominates the bias spring (18).