US Patent: 2,556,945
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| Backout or Nipple Wrench
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Patentee:
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| Eric M. Roddick (exact or similar names) - Long Beach, CA |
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Patent Dates:
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| Applied: |
Feb. 24, 1947 |
| Granted: |
Jun. 12, 1951 |
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Patent Pictures:
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Eric M. Roddick patent June 12, 1951 |
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Stan Schulz
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Description: |
| The "off center" opening in the gripping ring acts so that a relatively slight movement in either direction will result in gripping the inside of a pipe nipple or the like.
Roddick's company produced these in sizes corresponding to the internal diameters of all kinds of pipe and other items.
U.S. patents 1,152,195 and 2,282,743 and British patents GB-187103231 (Nov. 29, 1871) and GB-120783 (Nov. 27, 1981) are cited as references. |
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