Tools – Wrench – screwdriver – or driver therefor – Attachment – or including adjunct or replaceable portion
Patent
1996-04-16
1997-04-22
Smith, James G.
Tools
Wrench, screwdriver, or driver therefor
Attachment, or including adjunct or replaceable portion
81DIG11, 269266, B25B 1358
Patent
active
056220901
ABSTRACT:
A self-forming socket having a plurality of retractable pins bundled in parallel within a housing. The bundled pins may displace longitudinally and are biased by spring force away from a frame onto which the pins are slidably held. A spacer pin may be positioned at the center of the socket and is similarly biased away from the frame under spring force. When the socket is forced over a fastener, nut, or bolt head, groups of pins are pushed inward toward the frame and into the housing thereby conforming the pins to the contours of the fastener. Applying a torque to the socket transfers the torque through the bundled pins to the fastener. Each pin has a circular cross-section and an enlarged head and the interior walls of the housing containing the bundled pins has a hexagonal shape and may not contain any right angles. Grooves can be formed in the sides of the hexagonal shape to receive therein circular sides of adjacent ones of the enlarged heads. The pins are packed in a hexagonal arrangement.
REFERENCES:
patent: 3674070 (1972-07-01), Mahoney
patent: 3698267 (1972-10-01), Denney
patent: 4416173 (1983-11-01), Rebish
patent: 5235878 (1993-08-01), Young
patent: 5289997 (1994-03-01), Cook
patent: 5299473 (1994-04-01), Weber et al.
Feng Paul Y.
Smith James G.
Worktools, Inc.
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