US Patent: 2,519,477
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| Power Hammer
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Patentee:
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| Frederick H. Kind (exact or similar names) - Racine, Racine County, WI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 25, 1947 |
| Granted: |
Aug. 22, 1950 |
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Joel Havens
"Vintage Machinery" entry for Racine Tool & Machine Co.
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Description: |
| Abstract:
The invention relates to percussion tools, and more particularly to a reciprocatory or power hammer. One object of the invention is to improve upon reciprocatory hammers of the spring driven type by providing a double spring connection between the rotary driven shaft and the hammer associated with means for limiting the whip of the springs and thus greatly prolonging the useful life of the tool. It has been found in practice that where a single freely whippable spring is provided as a drive connection for the hammer, that frequent breakage of the spring occurs and that such a tool is commercially impracticable.
Claim:
In a device of? the character described, the combination off a rotary drive shaft, a reciprocatory hammer, a drive connection between said shaft and hammer including a compression spring and releasable detents normally engageable with said hammer to arrest its movement until released by an increase of tension in said spring, said hammer adapted to have impact engagement with a tool. |
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