US Patent: 800,850
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| Pipe Wrench
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Patentees:
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| David H. Irland (exact or similar names) - Chicago, IL |
| Frances A Irland (exact or similar names) - Chicago, IL |
| USPTO Classifications: |
| 81/99 |
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Patent Dates:
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| Applied: |
May 23, 1905 |
| Granted: |
Oct. 03, 1905 |
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Patent Pictures:
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David H. Irland patent Oct. 3, 1905 |
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Stan Schulz
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Description: |
| The compression spring in the handle works to close the jaw; the swinging handle opens the jaw by an internal linkage. This facilitated one-handed operation. This improvement on Irland's July 7, 1903 and Sept. 22, 1903 patents (nos. 732,858 & 739,316) is reflected in the 1906 "new product announcements" found in trade journals.
Further / alternate improvements appear in patent nos. 868,126 and 868,127. |
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