US Patent: 452,518
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| Wrench
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Patentee:
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| Frank S. Cook (exact or similar names) - Chicago, IL |
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Patent Dates:
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| Applied: |
Jan. 19, 1891 |
| Granted: |
May 19, 1891 |
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Patent Pictures:
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Frank S. Cook pat. May 19, 1891 with W&B Pat. May 19, 1891 (courtesy photo) |
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Stan Schulz
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Description: |
| The major focus of the patent is the reversible jaw element with two wearing faces, and the related jaw structure allowing for inserting replaceable jaw elements. The patent appears with a "Stillson" type jaw in a pipe wrench produced by Whitman & Barnes. The concept, as refined in design patent D28,487, was used on a movable jaw structure in a later Whitman and Barnes pipe wrench. |
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