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US Patent: 1,102,581
Valve Grinder
Patentee:
Oscar D. Hapgood - Orange, MA

USPTO Classifications:
451/117, 74/74

Tool Categories:
specialty tools : valve grinding tools

Assignees:
Goodell-Pratt Co. - Greenfield, MA

Manufacturer:
Goodell-Pratt Co. - Greenfield, MA

Witnesses:
John C. Sanders
A. B. Cottrell
C. D. Severance
G. A. Blake

Patent Dates:
Applied: Apr. 07, 1914
Granted: Jul. 07, 1914

Patent Pictures:
Oscar D. Hapgood patent July 7, 1914
USPTO pdf tiff
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Description:
Placement of the teeth provides oscillating rotary movement. The tool as produced has all the working parts inclosed.

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