US Patent: 376,991
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| Wrench
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| USPTO Classifications: |
| 81/92 |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 27, 1887 |
| Granted: |
Jan. 24, 1888 |
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Patent Pictures:
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Henry P. Roberts patent January 24, 1888 |
USPTO pdf tiff
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Description: |
| Combination nut and pipe wrench. The adjusting nut works on the threaded main shank. The novelty is the rocking double-faced movable jaw, with a spring between the jaw and base collar to provide the range of motion necessary for the pipe gripping side. |
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