FIELD: manual mounting tools, possibly development and making of wrenches with open span.
SUBSTANCE: wrench has head with open span restricted by two jaws and connection portion having at side of jaws recess with cylindrical surface. Value of arc radiuses R of outer contour of head restricting outer size of head in plane of jaws arrangement is set according to relation R≥0,5×(В-S/2), where B - outer size of head in plane of jaws arrangement; S - nominal size of span. Curvature centers of said arcs are arranged on arc of recess of connection portion.
EFFECT: enhanced operational reliability and safety of wrenches.
2 dwg
| Title | Year | Author | Number |
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SU1657362A1 |
