Composite hand tool
AssigneeSnap-on Incorporated
InventorsGregory A. Zurbuchen, Paul M. Machmeier
Life of this patent
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Abstract
A totally non-metallic wrench formed entirely of fiber-reinforced plastic material includes a core of random discontinuous glass-fiber-reinforced plastic material and a band of unidirectional continuous glass-fiber-reinforced plastic material extending around the periphery of the core which are subjected to compression molding to form a composite wrench structure.
Claims14
A method of making a composite hand tool comprising the steps of preparing a plurality of layers of a random discontinuous glass-fiber-reinforced plastic material having the shape of the outline of the hand tool;
- stacking the layers together to form a core for the hand tool;
- placing a band of unidirectional continuous glass-fiber-reinforced plastic material in the core to provide a mold charge;
- and subjecting the mold charge to heat and pressure in a compression molding apparatus for a predetermined interval of time to form a composite hand tool structure.
A method of making a composite wrench comprising cutting a plurality of layers of random discontinuous glass-fiber-reinforced plastic material in the shape of the outline of the wrench;
- stacking the layers on top of one another to provide a core;
- placing a band of unidirectional continuous glass-fiber-reinforced plastic on the core and extending the periphery of the core to produce a mold charge;
- subjecting the mold charge to heat and pressure in a compression molding apparatus for a predetermined interval of time to form a composite wrench structure.
Dependencies are inferred from the claim text.