US Patent: 238,369
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| Wrench
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Patentee:
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| Bernard Donohue (exact or similar names) - Yonkers, NY |
| USPTO Classifications: |
| 81/97 |
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Patent Dates:
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| Applied: |
Nov. 22, 1880 |
| Granted: |
Mar. 01, 1881 |
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Patent Pictures:
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Bernard Donohue Pat. March 1, 1881 |
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Stan Schulz
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Description: |
| The patent's focus is the "T" shaped jaw which swings out from the base of the movable jaw frame. Combination pipe and nut wrenches using this patent feature are known. It was applied to wrenches based on Donohue's Sept. 25, 1877 patent (no. 195,589). Later patents including Donohue's Dec. 12, 1882 (no. 268,784), and Nov. 12, 1889 (no. D19,412) culminated in the Tower & Lyon "ENGINEER'S" combination pipe and nut wrench. |
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