Method of heating and quenching a hollow metal member
First Claim
Patent Images
1. A method of manufacturing a metal member comprising the steps of:
- forming a metal body having a hollow core, wherein a side of the metal body defines a core opening exposing the hollow core;
placing a filament through the core opening into the hollow core without completely filling the hollow core;
closing the core opening around the filament; and
heating the metal body so that the filament disintegrates to form a filament hole sufficient to allow gas within the hollow core to escape through the filament hole to thereby prevent deformation of the metal body.
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Abstract
A method of manufacturing a metal member includes the steps of forming a metal body having a hollow core, wherein a side of the metal body defines a core opening exposing the hollow core; placing a filament through the core opening into the hollow core; closing the core opening around the filament; and heating the metal body so that the filament disintegrates to form a filament hole sufficient to allow gas within the hollow core to escape through the filament hole.
24 Citations
16 Claims
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1. A method of manufacturing a metal member comprising the steps of:
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forming a metal body having a hollow core, wherein a side of the metal body defines a core opening exposing the hollow core;
placing a filament through the core opening into the hollow core without completely filling the hollow core;
closing the core opening around the filament; and
heating the metal body so that the filament disintegrates to form a filament hole sufficient to allow gas within the hollow core to escape through the filament hole to thereby prevent deformation of the metal body.
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2. A method of manufacturing a metal bicycle crank arm comprising the steps of:
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forming a crank arm body having a hollow core, wherein a side of the crank arm body defines a core opening exposing the hollow core;
placing a filament through the core opening into the hollow core;
closing the core opening around the filament; and
heating the crank arm body so that the filament disintegrates to form a filament hole sufficient to allow gas within the hollow core to escape through the filament hole. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification