Tools – Wrench – screwdriver – or driver therefor – Rigid jaws
Patent
1996-01-04
1997-01-21
Meislin, D. S.
Tools
Wrench, screwdriver, or driver therefor
Rigid jaws
81186, B25B 1306
Patent
active
055950965
ABSTRACT:
An English-Metric drive including a generally cylindrical rigid body having a polygonal shaped bore extended axially therethrough and with the polygonal shaped bore bounded by a first hexagonal arrangement of twelve planar primary facets axially aligned with and offset from a second hexagonal arrangement of twelve planar secondary facets to thereby create a set of six primary points and a set of six secondary points with each primary point formed of a pair of primary facets joined at an apex and with each secondary point formed of a pair of secondary facets joined at an apex and wherein a first distance as measured between one of the primary facets of one of the primary points of the first arrangement and the parallel primary facet positioned directly opposite thereto is between about 1/2 to 31/2% different than a second distance as measured between one of the secondary facets of one of the secondary points of the second arrangement and the parallel secondary facet positioned directly opposite thereto.
REFERENCES:
patent: 3916736 (1975-11-01), Clemens
patent: 4646594 (1987-03-01), Tien
patent: 5388486 (1995-02-01), Ruzicka et al.
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