Tools – Wrench – screwdriver – or driver therefor – Rigid jaws
Patent
1986-06-16
1988-08-23
Meislin, Debra
Tools
Wrench, screwdriver, or driver therefor
Rigid jaws
811211, B25B 1302
Patent
active
047652110
ABSTRACT:
A wrench opening (14,14') is disclosed as having particular utility for use with a socket (10) or closed end wrench (34) and includes inwardly convex engagement surfaces (16) defining a closed shape and having continuously curved end portions (16a, 16b) that provide greater surface-to-surface engagement with a nut or bolt head to be torqued than is possible with conventional flat engagement surface portions. The curvature of the engagement surfaces 16 is selected to provide maximum surface-to-surface engagement when normal tolerance deviations are involved. Connecting surfaces (20 or 22) extending between the engagement surfaces (16) are constructed to provide improved stress distribution and reduced tooling cost.
REFERENCES:
patent: 2685219 (1954-08-01), Diebold
patent: 3125910 (1964-03-01), Kavalar
patent: 3354757 (1967-11-01), Grimm et al.
patent: 3695124 (1972-10-01), Myers
patent: 3763725 (1973-10-01), Reiland
patent: 4581057 (1986-04-01), Dossier
patent: 4583694 (1986-04-01), Williams et al.
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