Manhole cover frame removal saw
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United States of America Patent
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Apr 27, 2010
Grant Date -
N/A
app pub date -
Aug 31, 2006
filing date -
Aug 31, 2006
priority date (Note) -
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Abstract
A manhole cover frame removal apparatus has a ring-shaped base with a circular track thereon and a saw mounting framework disposed atop the base. Rollers allow the saw mounting framework to advance in rotation about aligned vertical axes of the frame and the base. A saw mounting arm is joined to the framework and may be raised and lowered and locked in the raised position. A saw carriage is mounted on the saw arm for reciprocal movement toward and away from a saw arm hinge axis. A single saw motor is mounted on the carriage and can be immobilized at selected angles. Separate horizontal-cut and vertical-cut saw blades are alternatively and interchangeably attached to the saw blade rotor.
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