US Patent: 2,377,271
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Flexible Shaft And Air-Cooled Hand Piece
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Patentee:
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Robert Schümann (exact or similar names) - Racine, Racine County, WI |
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Patent Dates:
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Applied: |
Dec. 12, 1942 |
Granted: |
May 29, 1945 |
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Joel Havens "Precise" Toolpost Grinder "Vintage Machinery" entry for Precise Products Corp.
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Description: |
Claim:
At the present time flexible shafts are used as a unit in fixed attachment to stationary motors. These flexible shafts, which are used for rotating various types of implements such as grinders, drills, buffers, sanders and the like, have band pieces which, due to the high speed at which the flexible shaft core rotates, become very hot, thus necessitating frequent interruption of the work being done to permit the hand piece to cool. Some hand pieces are provided with. insulation covering but such covering does not fully protect the operator's hands against the heat developed. |
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