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US Patent: 2,391,183
Centering means for boring machines
Wallace F. Mitchell - Chicago, IL

USPTO Classifications:
408/241R, 82/170

Tool Categories:
metalworking machines : boring and turning machines
trade specific : automobile mechanic

Automotive Maintenance Machinery Co. - North Chicago, IL

Automotive Maintenance Machinery Co. - North Chicago, IL


Patent Dates:
Applied: Mar. 18, 1943
Granted: Dec. 18, 1945

Patent Pictures:
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"Vintage Machinery" entry for Automotive Maintenance Machinery Co. (AMMCO)
"My invention relates generally to boring machines adapted for the boring of one or a plurality of so-called in-line bearings; and it has to do particularly with means for centering a boring bar relative to the bearing to be bored."

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