Expansion joint grinder
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United States of America Patent
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May 18, 2010
Issued Date -
N/A
app pub date -
Jul 8, 2008
filing date -
Jul 8, 2008
priority date (Note) -
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status (Latency Note)
Importance
Abstract
An apparatus for grinding both inside surfaces of a concrete joint simultaneously is disclosed. The apparatus includes a proximal grinding wheel having a rotational axis and a grinding implement fixed with a proximal side, and an external drive shaft fixed to the center thereof. A distal grinding wheel is included that has the same rotational axis a grinding implement fixed with a distal side. An internal drive shaft is fixed partially within the external drive shaft and to the center of the distal grinding wheel. The apparatus further includes a means for moving both grinding wheels apart, a source of rotational kinetic energy, and a means for coupling the source of rotational kinetic energy to each drive shaft.
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