B - Operations – Transporting – 25 – B
Patent
B - Operations, Transporting
25
B
81/33
B25B 23/08 (2006.01) B25B 21/00 (2006.01)
Patent
CA 1036397
POWER DRIVEN SCREW DRIVER WITH A SCREW HOLDING NOSEPIECE Abstract of the Disclosure A power driven screw driving tool having a screw holding nosepiece detachably mounted to its end, the nosepiece having slidable sleeve members cooperable with ball elements to obtain an initial locked condition of a screw entered into the nosepiece for positioning the screw relative to the work, and being cooperable with one another to obtain a released condition to per- mit the screw to be finally driven out of the tool into the work. A first embodiment describes the nosepiece as adapted for use with a tool in which the spindle and driving bit are restrained against axial movement rela- tive to the housing. A variation of the first embodiment describes the nosepiece as having a screw back-up sleeve as being fixed to an inner sleeve, rather than relatively slidable as in the first embodiment. And a further em- bodiment discloses a modified form of the sleeves and back-up element in a nosepiece associated with a clutch engageable spindle and bit, the back-up element in this embodiment being adjustable according to variations in the heads of screws to be accommodated. The arrangement of the components of the tool is such that while the tool -i- is held in one hand, it requires a simple continuous operation of pressing a screw into the nosepiece with the other hand until a gripped condition of the screw is obtained therein. -ii-
250650
Lesner Richard S.
Macdonald Murdo A.
Lesner Richard S.
Macdonald Murdo A.
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