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US Patent: 1,591,400
Valve Grinding Tool
Patentee:
John Orawiec - Chicago, IL

USPTO Classifications:
451/117

Tool Categories:
specialty tools : valve grinding tools

Assignees:
None

Manufacturer:
Unknown

Witnesses:
none listed

Patent Dates:
Applied: Apr. 20, 1925
Granted: Jul. 06, 1926

Patent Pictures:
John Orawiec patent July 6, 1926
USPTO pdf tiff
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Description:
The twist on the shaft reverses to impart oscillating rotation with each downward stroke. The adjustable base and anti-friction rollers in the slider help control downward pressure. A known example is marked in part, "JOHN'S MECHANICAL PRODUCTS - PAT JULY 2, 1926 - OTHER PATENTS - CHICAGO"

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