Drill bit retriever device
OwnerPat Orrinventor
Life of this patent
Estimating the term…
Abstract
A cutting tool assembly for cutting holes in a work piece is disclosed. The assembly includes a cutting tool member with a cylindrical cutting member, a shank member, and a guide means providing at least one guide surface tapering from the cutting member to the shank member to assist in removing the assembly from a hole cut in the work piece. Also disclosed is a conical guide member that fastens to a cutting tool providing a guide surface for the stated purpose.
Claims20
A hole cutting tool and guide assembly for cutting an aperture in a work piece comprising:
- (a) a hole cutting tool member having a cylindrical cutting member with a cylindrical surface of selected circumference, said cylindrical cutting member having a plurality of circumference cutting teeth on a first end thereof, an anchoring point member centered on said first end thereof, and a shank member extending from a second end of said cylindrical cutting member opposite said cylindrical cutting member first end, said shank member having a circumference less than said selected circumference of said cylindrical cutting member, said shank member adapted for rotating said cutting tool member;
- and
- (b) guide means providing at least one guide surface tapering from said cylindrical surface adjacent said second end of said cylindrical cutting member toward said shank member, said guide means assisting in removal of said cutting tool member from the aperture formed by said cutting tool cylindrical cutting member.
The hole cutting tool and guide assembly according to 7 wherein, said conical guide member is reversibly fastened to said hole cutting tool member.
The hole cutting tool and guide assembly according to 8 further comprising, at least one set screw member contained in at least one threaded aperture, said at least one threaded aperture connecting said conical member guide surface and said axial bore therein.
The hole cutting tool assembly according to 7 wherein, said conical guide member is fabricated from aluminum metal.
A guide means for attachment to a hole cutting tool with a cylindrical cutting member of selected circumference, said cutting member having hole cutting means on a first end and a shank member attached to a second end, said guide means assisting in removal of the hole cutting tool from an aperture cut in a work piece, said guide means comprising;
- (a) a conical member with a first end and a smaller second end, said conical member having an axial bore there through, said conical member first end of circumference essentially equal to the selected circumference of the hole cutting tool cylindrical cutting member, and said conical member axial bore of sufficient size to accommodate the hole cutting tool shank member therein, said conical member having at least one guide surface tapering from said first end to said second end thereof, and
- (b) means for securing said conical member to the hole cutting tool.
The guide means according to 17 wherein, said means for securing said conical member to the hole cutting tool comprises at least one set screw member contained in at least one threaded aperture, said at least one threaded aperture connecting said conical member guide surface and said axial bore therein.
The guide means according to 17 wherein, said conical guide member is fabricated from aluminum metal.
Dependencies are inferred from the claim text.