US Patent: 633,709
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| Pipe Wrench
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Patentee:
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| William Vanderman (exact or similar names) - Willimantic, Windhan County, CT |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 31, 1899 |
| Granted: |
Sep. 26, 1899 |
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Patent Pictures:
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William Vanderman patent Sept. 26, 1899 |
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Stan Schulz
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Description: |
| The central focus of the patent is "engaging surfaces shaped in conformity with the surface of the pipe." A clamping jaw with curved surfaces matching common pipe sizes is shown with options for adjustable chain grip, matching inserts for a "hook jaw" or a fixed "hook jaw."
The patent was offered for sale in the Jan. 13, 1900 THE METAL WORKER.
F. H. Richards - patent attorney
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