US Patent: 18,135
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Improved Wrench
Hinged Claw and Screw-Adjusting Gripper Wrench
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Patentee:
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| H. M. Clark (exact or similar names) - New Britain, CT |
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Patent Dates:
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| Granted: |
Sep. 08, 1857 |
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Patent Pictures:
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H. M. Clark patent Sept. 8, 1857 |
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Stan Schulz
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Description: |
| The adjustable toothed portion on handle grips pipe by wedging it against a spring-loaded "hook" jaw. The specifications specifically note and distinguish this design from Bartholomew & Merrick's 1849 patent 6,002 and G.A. Jenks' June 24, 1856 patent 15,184. |
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