US Patent: 433,794
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| Wrench
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Patentee:
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| Friedrich Wilhelm Kasch (exact or similar names) - Austin, TX |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Dec. 12, 1889 |
| Granted: |
Aug. 05, 1890 |
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Patent Pictures:
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Friedrich Wilhelm Kasch patent August 5, 1890 |
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Stan Schulz
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Description: |
| The adjustment nut and threaded shank of the movable jaw are enclosed in a rectangular sleeve, and both jaws have replaceable gripping surfaces. The extended sleeve also acts as a secondary handle to release the grip when the wrench is used on pipe.
Ken Cope's "American Wrench Makers 1830-1930" notes a SCIENTIFIC AMERICAN mention of the patent that implies Kasch intended to produce the wrench.
Corresponding Canadian patent CA-35,436 was granted Nov. 19, 1890. |
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