Close proximity grinder

Details Close proximity grinder Close proximity grinder

2006-07-06

2010-11-23

Kreck, John (Department: 3672)

Mining or in situ disintegration of hard material

Hard material disintegrating machines

Floor-working

Reexamination Certificate

active

07837276

ABSTRACT:
A close proximity pavement grinder is utilized for grinding close to a raised structure such as a lower surface of curbs close to the curb wall. The grinding apparatus utilizes a wide grinding head with grinding blades mounted along the length of an arbor to grind the lower surface of the curb in a single pass. The grinder includes a narrow bearing and support at the outer end of the arbor and is driven at the inner end so that the grinding may be conducted within close proximity of the curb wall. The grinder has a pivoting grinding head that can be locked at various angles relative to the grinder to match the relative angles between the pavement and the lower surface of the curb.

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Exhibit E, Cushion Cut PC-5000 Highway Grinder brochure, 4 pages (prior art at least as early as Jul. 16, 1998).

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