Abrasive tool making process – material – or composition – Impregnating or coating an abrasive tool
Patent
1982-09-13
1984-11-20
Briggs, William R.
Abrasive tool making process, material, or composition
Impregnating or coating an abrasive tool
51206R, 51327, 408 1BD, 408144, 408145, B24B 100, B23B 3500
Patent
active
044831080
ABSTRACT:
A drill bit suitable for making holes in glass and ceramic structures has an elongated member with a cutting end and a retaining end with an axis passing through its ends. The portion of the member near the retaining end is formed as a shank which is capable of being suitably held and rotated by a chuck or the like. The shank distal to the retaining end terminates in a shoulder which tapers inwardly toward a pilot element which extends axially from the center of the shoulder coaxial with the shank. The pilot element terminates in a cutting surface with the cutting surface forming the forwardmost portion of the cutting end of the member. A cutting grit is permanently affixed at least to the cutting surface on the pilot element, the shoulder and the portion of the shank immediately adjacent to the shoulder. The cutting surface of the pilot element, including the grit affixed thereto, has a smaller cross-sectional dimension than the cross-sectional dimension of the shank immediately adjacent to the shoulder, including the grit affixed thereto. In passing through a material, the grit on the cutting surface of the pilot element cuts a hole of a first dimension and the grit on the shoulder and that portion of the shank immediately adjacent to the shoulder enlarge this hole as they pass therethrough.
REFERENCES:
patent: 2555746 (1951-06-01), Horsky et al.
patent: 2562587 (1951-07-01), Swearingen
patent: 2649667 (1953-08-01), Cooke
patent: 2978846 (1961-04-01), Barron
patent: 2996061 (1961-08-01), Miller
patent: 3142138 (1964-07-01), Kean et al.
patent: 3346894 (1967-10-01), Lemelson
patent: 3894673 (1975-07-01), Lowder et al.
Boswell K. H.
Briggs William R.
O'Brian Edward D.
Webb Glenn L.
LandOfFree
Drill bit for glass and ceramic structures does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drill bit for glass and ceramic structures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drill bit for glass and ceramic structures will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2183441