US Patent: 1,369,143
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| Spud Wrench
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Patentee:
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| Charles G. Tengdin (exact or similar names) - Kankakee, IL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jul. 12, 1920 |
| Granted: |
Feb. 22, 1921 |
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Patent Pictures:
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Patent 1,369,143 - edited drawing |
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Stan Schulz
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Description: |
| "The object of the invention is to provide a simple and powerful device by means of which spuds, thimbles, or other similar cylindrical articles may be readily handled and screwed into or out of threaded engagement with a threaded support." "The device comprises an expander head formed of a plurality of radial sections." The specifications note the gripping faces could be faced with leather. Corresponding Canadian patent CA-231,927 was granted June 12, 1923.
The issue of gripping the internal surface of tubular objects was also addressed in 19th Century patents for the "bushes" used in wooden beer barrels, etc., and in later 20th Century "internal pipe wrenches." |
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