US Patent: 1,345,710
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| Collapsible Tap
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Patentee:
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| Arthur A. Shafer (exact or similar names) - Erie, Erie County, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jun. 27, 1919 |
| Granted: |
Jul. 06, 1920 |
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Joel Havens
"Vintage Machinery" entry for Rickert-Shafer Co.
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Description: |
| Claim:
In a collapsible tap a body member having radial slots, chasers slidably mounted in said slots, a central shaft member in said body, cam surfaces carried thereby adapted to force said chasers outwardly at one movement, and the cam ring mounted thereon and rotatable with said central shaft to force said chasers inwardly at the reverse movement thereof. |
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