Wrench openings

Details Wrench openings Wrench openings

1991-04-23

1992-03-03

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Rigid jaws

81186, B25B 1302

Patent

active

050922033

ABSTRACT:
A wrench, such as a socket, for a torquing device, such as a ratchet wrench for cooperating with a fastener, such as a nut or bolt. The fastener has plurality of faces that join each other at respective edges. The fastener also has radii that are measured from the center of the fastener to the respective faces thereof, a first radius from the center of the fastener which is normal to the face of the fastener; a second radius at an angle of approximately 15.degree. from the first radius and a third radius at an angle of approximately 15.degree. plus a flank angle from the first radius. The coupling element includes a plurality of adjoining surfaces. Each surface includes an adjoining flank section at each end thereof that is angled with respect to the surface in a direction away from the corner of the fastener, the angle being the flank angle. The surface at the respective flank section thereof always engages the respective face of the fastener at a point thereon between the intercepting of the second radius and the intercepting of the third radius which point of intercepting is spaced from the respective adjacent corner of the fastener by an optimum distance.

REFERENCES:
patent: 3242775 (1966-03-01), Hinkle
patent: 4581957 (1986-04-01), Dossier

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