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US 4,842,451 AGranted
Deburring drill bit
OwnerBen A. Duggerinventor
Life of this patent
Estimating the term…
Abstract
A deburring drill bit having a shank, an elongated shaft, a drill bit head having forward drilling surfaces formed in the head, and rearward deburring surfaces formed behind said forward drilling surfaces, whereby drilling and deburring can be performed in a single operation, the drilling surfaces having a first longitudinal axis and the deburring surfaces having a second longitudinal axis not coincident with said first longitudinal axis.
Claims4
Apparatus for drilling and deburring an aperture in a single operation comprising:
- (a) a shank having a first longitudinal axis;
- (b) an elongated shaft securred to said shank and having a second longitudinal axis not coincident with and not parallel to said first longitudinal axis;
- (c) a drill bit head securred to said shaft having a longitudinal axis coincident with said second longitudinal axis;
- (d) drilling surfaces formed in the forward edge of said head, said drilling surfaces having a longitudinal axis coincident with said second longitudinal axis;
- (e) deburring surfaces formed in the side of said shaft, said deburring surfaces having a longitudinal axis coincident with said first longitudinal axis.
2 more elements
Dependencies are inferred from the claim text.