Tools – Wrench – screwdriver – or driver therefor – Machine
Patent
1995-12-05
1997-05-20
Smith, James G.
Tools
Wrench, screwdriver, or driver therefor
Machine
81 5729, 81 5713, B25B 1700
Patent
active
056303432
ABSTRACT:
An improved power socket wrench which includes a handle portion and a power drive portion. The handle portion further provides an internal drive shaft extending through the handle portion, for engaging, tangentially, a geared drive gear in the power drive portion of the wrench. The drive gear further provides a laterally extending hub member which is able to accommodate a plurality of interchangeable sockets, metric and non-metric, during use without having to interchange parts in the power drive portion. Upon rotation of the internal drive shaft, the drive gear within the power drive portion imparts rotation to the socket, for tightening or loosening the bolt or nut in question. The wrench of the present invention further comprising an improvement over the prior art in that a single ball bearing located within the wrench adjustably constrains the axial motion and force of the drive shaft when the wrench is operated in a drive direction, and oil light bronze fittings constrain the axial motion and force of the drive shaft when in is operated in a reverse direction.
REFERENCES:
patent: 2603976 (1952-07-01), Hilton
patent: 3430510 (1969-03-01), Hendrickson
patent: 4510825 (1985-04-01), Neron et al.
patent: 4517861 (1985-05-01), Stemberger
patent: 5277087 (1994-01-01), Wilson et al.
patent: 5345845 (1994-09-01), Myers
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