US Patent: 2,199,343
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| Method of reclaiming broach tools
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Patentee:
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| Elmer J. Lapointe (exact or similar names) - Ann Arbor, MI |
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Patent Dates:
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| Applied: |
May 12, 1939 |
| Granted: |
Apr. 30, 1940 |
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Jeff Joslin
Vintage Machinery entry for American Broach & Machine Co.
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Description: |
| When the finishing teeth on a broaching cutter are sufficiently worn, the hole cut by the broach falls below spec and the broach must normally be replaced. This invention involves boring a tapered hole in the end of the broach, inside the finishing teeth, heating up the broach and then permanently inserting a chilled tapered pain into the hole. This can expand the end of the broach by 0.002 or more inches, which allows the broach to be sharpened while maintaining spec. |
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