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US Patent: 1,065,749
Device For Manipulating Explosive Engine Valves
Patentee:
John H. Wall - Bristol, RI

USPTO Classifications:
451/117

Tool Categories:
specialty tools : valve grinding tools

Assignees:
None

Manufacturer:
J. H. Wall - Bristol, RI

Witnesses:
Elsa B. Dana
Ada E. Hagerty
J. A. Miller

Patent Dates:
Applied: Oct. 01, 1912
Granted: Jun. 24, 1913

Patent Pictures: [ 1 | 2 ]
John H. Wall patent June 24, 1913
USPTO pdf tiff
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Description:
The tool is designed to "oscillate" engine valves to break built up carbon. The open end would engage the valve stem by bearing against the pin which connected the valve to the valve spring.

Wall's Perfect Valve Grinder used an oscillating lever to move the gripping head rather than the gear train shown in this patent.

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