(12) United States Patent ao) Patent No.: us 6,358,133 Bi
Cesena et al. (45) Date of Patent: Mar. 19,2002
Inventors: Robert T. Cesena, Richfield, MN (US);
Naum N. Tselesin, Atlanta, GA (US);
Gary M. Palmgren, Lake Elmo; Jay
B. Preston, Woodbury, both of MN
(73) Assignee: 3M Innovative Properties Company,
St. Paul, MN (US)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 0 days.
(21) Appl. No.: 09/256,837
(22) Filed: Feb. 24, 1999
Related U.S. Application Data
(63) Continuation-in-part of application No. 09/019,657, filed on Feb. 6, 1998.
(51) Int. CI.7 B24B 55/02
(52) U.S. CI 451/450; 451/541; 451/542;
451/544; 451/546; 451/547
(58) Field of Search 451/541, 542,
451/544, 546, 547
(56) References Cited
U.S. PATENT DOCUMENTS
A cylindrical, abrasive grinding wheel having a cylindrical abrasive region with an abrasive surface at an outer circular band thereof. The abrasive region includes layers of abrasive particles. The layers of abrasive particles can be tilted with respect to an axis of rotation of the grinding wheel or they can such that grooving in the grinding wheel and a workpiece ground by the grinding wheel can be reduced. Alternatively, the abrasive region can be formed from a plurality of abrasive segments each having layers of abrasive particles. The layers of abrasive particles can be staggered in the direction of the axis of rotation from one segment to another. This can also reduce grooving in the grinding wheel and workpieces.
36 Claims, 12 Drawing Sheets