CA Patent: CA-229,008
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| Valve Spring Lifter
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Patentee:
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| John Fabien Duby (exact or similar names) - Boston, MA |
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Patent Dates:
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| Granted: |
Feb. 27, 1923 |
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Patent Pictures:
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John F. Duby patent Febr. 27, 1923 |
CIPO Data
Espacenet patent
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Stan Schulz
229,008 in Canadian Patents Database
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Description: |
| Valve spring compressor with screw for size adjustment, combined with "squeeze handle" action and a pawl and rack to hold the clamp once the spring is compressed.
Duby was advertising this tool in the early 1920s.
Corresponding U.S. patent 1,365,468 was granted January 11, 1921. |
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