US Patent: 852,145
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| Valve Jack
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Patentee:
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| Ernest Stevens (exact or similar names) - Chicago, IL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 04, 1907 |
| Granted: |
Apr. 30, 1907 |
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Patent Pictures:
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Ernest Stevens patent April 30, 1907 |
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Stan Schulz
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Description: |
| The specifications describe the operation: the outer ends of the upper and lower levers are pulled away from each other to compress the spring. The nut on the "outer" rod can be turned to hold the tool in that position. |
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