US Patent: 1,868,440 - Boring machine and method


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US Patent: 1,868,440

Boring machine and method

Patentee:

Ewald A. Arp (exact or similar names) - Minneapolis, MN

USPTO Classifications:

408/234, 408/709, 408/83

Tool Categories:

specialty tools : automotive tools

metalworking tools : boring bars

trade specific : vehicle repairer : vehicle mechanic : cylinder maintenance

Assignees:

Van Norman Machine Tool Co. - Springfield, MA

Manufacturer:

Van Norman Machine Tool Co. - Springfield, MA

Witnesses:

Unknown

Patent Dates:
Applied:	Jul. 29, 1929
Granted:	Jul. 19, 1932

Patent Pictures:

USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for Van Norman Machine Tool Co.

Description:

Patent number seen on a Van Norman "Per-Fect-O" 77/S4 boring bar, along with patents 1,906,241, 1,881,993, and 1,954,034.

"My invention relates to machines for finishing the bore of cylinders. It relates more particularly to machines for use in connection with cylinders of automobile engines, either to finish the bore of new cylinders or to refinish the bore of cylinders which have become uneven through use. An object of the invention is to provide a machine which will give a smooth and uniform finish to the bore of the cylinder making it unnecessary to follow up the cutting operation by a honing operation..."