Ball head polygonal wrench

Details Ball head polygonal wrench Ball head polygonal wrench

B - Operations, Transporting

25

B

81/29

B25B 15/00 (2006.01) B25B 13/48 (2006.01)

Patent

CA 1122821

BALL HEAD POLYGONAL WRENCH ABSTRACT OF THE INVENTION A wrench with a polygonal cross section includes an integral drive shank portion, a neck portion, and a drive head portion in a coaxial relationship along a central axis. The head portion has curved sides corresponding to the same number of sides as the shank portion with the radius of curvature of the sides being displaced outwardly from the longitudinal axis of the wrench so that each side substantially conforms to a portion of an ellipse whose minor axis lies along the central axis. The surface of the neck portion substantially conforms to an inwardly curved surface of revolution whose axis of revolution lies along the central axis of the wrench.

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