US Patent: 1,444,729
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| Valve Spring Lifter
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Patentee:
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| David E. Carlson (exact or similar names) - Galesburg, IL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jul. 22, 1921 |
| Granted: |
Feb. 06, 1923 |
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Patent Pictures:
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David E. Carlson patent February 6, 1923 |
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Stan Schulz
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Description: |
| Rollers on the "back" end of the jaws slide over the handles to maintain the jaws in parallel orientation.
Cited in patent no. 1,879,330. |
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