US Patent: 1,734,831
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| Jack
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Patentee:
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| William B. Runyan (exact or similar names) - Dayton, OH |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jul. 18, 1925 |
| Granted: |
Nov. 05, 1929 |
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Patent Pictures:
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Patent 1,734,831 - edited image |
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Stan Schulz
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Description: |
| The patent focuses on means for controlling the action of "screw within a screw" lifting jacks. The bevel gear "driver" for the screw is not part of the claims. The patent number appears on the barrel of a compact jack, along with RE17,050, etc. [see RE17,050 entry for photo of the jack]
The specifications include one formal "correction." |
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