US Patent: 1,827,510 - Valve seat reamer


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US Patent: 1,827,510

Valve seat reamer

Patentee:

William H. Evans (exact or similar names) - Chicago, IL

USPTO Classifications:

408/227, 408/714, 76/115

Tool Categories:

trade specific : vehicle repairer : vehicle mechanic : valve and seat maintenance

metalworking machines : drilling and boring : drill bits : reamers

Assignees:

Evans Flexible Reamer Corp. - Chicago, IL

Manufacturer:

Evans Reamer & Machine Co. - New Lexington, OH

Evans Flexible Reamer Corp. - Chicago, IL

Witnesses:

Unknown

Patent Dates:
Applied:	Nov. 04, 1926
Granted:	Oct. 13, 1931

Patent Pictures:

USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Lempco Products, Inc.

Description:

Evans Flexible Reamer Corp. was acquired in 1943 by Lempco Products, Inc., and renamed to Evans Reamer & Machine Co. This reamer is an anti-chatter design made from a metal stamping, and in addition it provides two types of cutting teeth, one to break through the hard carbon scale on the valve seat, and the second to ream the metallic valve seat itself. The metal-cutting teeth stand slightly forward of the carbon-cutting teeth but are more flexible and have more cutting surface so that when encounter the hard carbon layer, they flex rather than bite in, which exposes the second set of teeth.