Handhole Seat Resurfacing Tool for Naval Pressure Fired Boilers.
Patent, Filed 24 Apr 81, patented 21 Jun 83,
DEPARTMENT OF THE NAVY WASHINGTON DC
Pagination or Media Count:
A grinder for preparing circular seats behind elliptical handholes of marine boilers. An air motor, mounted within an expandable housing, drives a grinding wheel against the inside surface of the handhole. The housing is expanded to be secured in the elliptical handhole. The center of the motor orbits on a circle about the center of the housing so that a circular seat is formed about the inside edge of the elliptical handhole.
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