US Patent: 1,102,581
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| Valve Grinder
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Patentee:
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| Oscar D. Hapgood (exact or similar names) - Orange, MA |
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Patent Dates:
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| Applied: |
Apr. 07, 1914 |
| Granted: |
Jul. 07, 1914 |
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Patent Pictures:
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Oscar D. Hapgood patent July 7, 1914 |
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Stan Schulz
Goodell-Pratt Valve Grinders (FLICKR)
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Description: |
| Placement of the teeth provides oscillating rotary movement. The tool as produced has all the working parts enclosed. Goodell-Pratt produced the valve grinder with a cast aluminum body (No. 467) and cast iron body (No. 288). The patent date is stamped in the crank handle. |
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