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Publication numberUSD574403 S1
Publication typeGrant
Application numberUS 29/277,766
Publication dateAug 5, 2008
Filing dateMar 9, 2007
Priority dateMar 9, 2007
Publication number277766, 29277766, US D574403 S1, US D574403S1, US-S1-D574403, USD574403 S1, USD574403S1
InventorsWilliam J. Brady
Original AssigneeThe William J. Brady Loving Trust
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Hard rock percussion drill bit with paraboloid PCD inserts
US D574403 S1
Abstract  available in
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  1. The ornamental design for a hard rock percussion drill bit with paraboloid PCD inserts, as shown and described.

FIG. 1 is a greatly enlarged side elevational view of a hard rock percussion drill bit embodying the invention.

FIG. 2 is a top plan view thereof.

FIG. 3 is a bottom view thereof.

FIG. 4 is a side elevation thereof, as rotated 90 from the FIG. 1 position, and partially fragmented and broken away to illustrate the interiorly threaded bore at the bottom end; and,

FIG. 5 is a perspective view of thereof.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US8641336Aug 12, 2011Feb 4, 2014Charles A. Van HorssenTool holder and cutting tool
U.S. ClassificationD15/139