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US Patent: 1,434,711
Manually-operated broaching machine
Francis J. Lapointe - Ann Arbor, MI

USPTO Classifications:
409/279, 409/284

Tool Categories:
metalworking machines : broaches


American Broach & Machine Co. - Ann Arbor, MI

David A. De Long
Roscoe O. Bonisteel

Patent Dates:
Applied: Jun. 08, 1921
Granted: Nov. 07, 1922

Patent Pictures:
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"Vintage Machinery" entry for American Broach & Machine Co.
"This invention... has for its object the provision of an inexpensive device of this character particularly adapted for use in service stations and garages for the purpose of broaching out the worn holes in pistons to receive oversize piston pins and also to form new bearings in the larger ends of connecting rods."

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