Electrically driven speed reducing power unit
United States Patent 2672170

Inventors:
Johnson, Arthur C.
Publication Date:
03/16/1954
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Assignee:
Johnson, Arthur C.
Primary Class:
144/49
Other Classes:
408/20, 144/35.100, 144/1.100, 474/113, 144/135.300, 83/494, 144/136.100, 474/146, 144/134.100
International Classes:
B27C9/02; B27C9/00
US Patent References:
2137921Electric motor and support therefor
2154745Power driven tool
2197207Power tool for removing old putty
2242336Power saw
2284441Change speed transmission gear
2291999Tool holder
2430798Motor transmission