Cutting by use of rotating axially moving tool – Tool or tool with support – Including detailed shank
Reexamination Certificate
2006-07-04
2006-07-04
Howell, Daniel W. (Department: 3722)
Cutting by use of rotating axially moving tool
Tool or tool with support
Including detailed shank
C408S230000, C408S233000, C408S713000
Reexamination Certificate
active
07070367
ABSTRACT:
A twist drill, having a replaceable drill tip, comprising a drill bit shaft (1), a cutting insert (2) which is detachably fixed thereto and which forms the tip area of the twist drill, and comprises a flute (3) that continues into the cutting insert (2). The cutting insert rests, with a bearing surface (6) extending orthogonal to the center longitudinal axis (8) of the drill bit, on the face (7) of the drill bit shaft (1) and extends with a fixing stud (9), which centrally protrudes from the bearing surface (6), into a receiving recess (10) which is configured complementary thereto and which is provided in the face (7) of the drill bit shaft (1). At least one peripheral section (13) of the fixing stud (9) comprises a first longitudinal section (15) that, with a screw surface (16) which points away from the drill bit shaft (1), which slopes upward to the drill bit tip (5) in a direction of rotation of the drill bit, and which interacts with an opposite surface (19) on the inner wall (14) of the receiving recess (10), merges into a second longitudinal section (17).
REFERENCES:
patent: 756339 (1904-04-01), Down
patent: 932071 (1909-08-01), Urbscheit
patent: 3153356 (1964-10-01), Dearborn
patent: 3293727 (1966-12-01), Simms
patent: 3359837 (1967-12-01), Andreasson
patent: 4561812 (1985-12-01), Lindén
patent: 5024563 (1991-06-01), Randall
patent: 5114286 (1992-05-01), Calkins
patent: 5154550 (1992-10-01), Isobe et al.
patent: 5228812 (1993-07-01), Noguchi et al.
patent: 5863162 (1999-01-01), Karlsson et al.
patent: 5904455 (1999-05-01), Krenzer et al.
patent: 5957631 (1999-09-01), Hecht
patent: 5980166 (1999-11-01), Ogura
patent: 5988953 (1999-11-01), Berglund et al.
patent: 6012881 (2000-01-01), Scheer
patent: 6059492 (2000-05-01), Hecht
patent: 6071045 (2000-06-01), Janness
patent: 6109841 (2000-08-01), Johne
patent: 6276879 (2001-08-01), Hecht
patent: 6283682 (2001-09-01), Plummer
patent: 6582164 (2003-06-01), McCormick
patent: 524677 (1931-05-01), None
patent: 195 43 233 (1997-05-01), None
patent: 199 45 097 (2001-03-01), None
patent: 0 118 806 (1984-09-01), None
patent: 907980 (1946-03-01), None
patent: WO 96/11079 (1996-04-01), None
patent: WO 98/53943 (1998-12-01), None
Howell Daniel W.
Kennametal Inc.
Nils H. Ljungman & Associates
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