Torque driving member and retainer for driven member

Details Torque driving member and retainer for driven member Torque driving member and retainer for driven member

B - Operations, Transporting

25

B

81/32

B25B 23/10 (2006.01)

Patent

CA 2006932

ABSTRACT A rotatable driving tool for imparting torque to a driven member, such as a threaded fastener having an axial recess in the head thereof, comprises a circularly cylindrical body with a plurality of substantially circularly helical driving portions projecting laterally therefrom and equiangularly spaced about the cylindrical axis, each of the driv- ing portions having a small helix angle, preferably between one and three degrees. The driving portions mate with lobes of the fastener recess but are slightly inclined with respect thereto to provide a wedge fit to retain the fastener in engagement with the tool body.

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