Earth working – Driven from or guided by stationary object – or anchored – Rotatable about vertical axis
Reexamination Certificate
2006-10-31
2006-10-31
Beach, Thomas A. (Department: 3671)
Earth working
Driven from or guided by stationary object, or anchored
Rotatable about vertical axis
Reexamination Certificate
active
07128165
ABSTRACT:
A system and method of cutting a core out of a finished surface for keyhole excavation provides a truck with a turret to which a support arm supporting the cutter assembly is mounted, and a stabilizing member remote from the turret, which allows the turret to be rotated about its complete arc of motion while stabilizing the support arm at any desired position about the truck. In a first embodiment the invention comprises an upstanding support rim affixed to or integrated into the bed of the truck. In a further embodiment the invention comprises a support member affixed to the horizontal arm and supported by the truck bed. This makes the keyhole excavation procedure safer and more precise, and allows a larger-depth cutting head to be used in order to penetrate thicker finished surfaces. In the preferred embodiment the cutter head is provided with a pilot which creates a pilot hole in the core that facilitates removal, manipulation and replacement of the core, and improves the integrity of the reinstated core.
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Beach Thomas A.
de Villers Etienne
Dimock Stratton LLP
Enbridge Technology Inc.
Torres Alicia
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