Cutting by use of rotating axially moving tool – Tool-support with means to permit positioning of the tool... – Tool having stepped cutting edges
Reexamination Certificate
2011-07-19
2011-07-19
Howell, Daniel W (Department: 3726)
Cutting by use of rotating axially moving tool
Tool-support with means to permit positioning of the tool...
Tool having stepped cutting edges
C408S224000, C408S233000, C408S713000
Reexamination Certificate
active
07980794
ABSTRACT:
A ring with a cutting edge detachably fixed to a drilling tool, and machines the peripheral edge of a hole bored by the drilling tool can be simply attached to the drilling tool. A ring with a cutting edge is constituted by a ring portion, in which an insertion hole allowing a drilling tool to be inserted in the direction of an axis O thereof and having a circular shape in plane view, is formed, the ring portion has a portion on the inner peripheral surface provided with a recess formed radially outward, a circular-arc arm portion, which extends in the peripheral direction from one peripheral end of the inner peripheral surface toward the other peripheral end thereof, in the opening edge of the recess facing the inner peripheral surface and is elastically deformable in the radial direction, is formed integrally in the ring portion, and the circular-arc arm portion is pressed axially inward by a fastening screw threadedly attached to a threaded attachment hole which goes through the ring portion in the radial direction, and is opened to a bottom surface of the recess.
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Howell Daniel W
Leason Ellis LLP.
Mitsubishi Materials Corporation
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