Abstract A reamer adapted to be driven by a rotary machine to enlarge a hole in a plate in a single pass to accommodate a socket-head screw having a head portion and a shank portion with a single pass of the reamer, includes an elongated rodlike member having a rear end portion adapted to be attached to the machine, and a front non-cutting cylindrical portion having a diameter slightly less than the diameter of the hole to serve as a guide therein and having an axial length substantially less than the axial length of the hole. An intermediate enlarged cylindrical cutting portion has spirally-extending cutting edges thereon and spirally-extending material-guiding grooves therebetween, the diameter and the axial length of the intermediate portion being slightly larger than the corresponding diameter and axial length of the head portion of the screw to enlarge the hole to receive the head portion of the screw. A still further enlarged intermediate beveling portion is disposed to the rear of the cutting portion for shaping the plate surrounding the hole.
A reamer adapted to be driven by a rotary machine to enlarge a hole in a plate to accommodate a socket-head screw having a head portion and a shank portion, comprising: an elongated rodlike member including a rear end portion adapted to be removably and drivingly attached to the machine, a front noncutting cylindrical portion having a diameter slightly less than the diameter of the hole to serve as a guide therein and having an axial length substantially less than the axial length of the hole, an intermediate enlarged cylindrical cutting portion having spirally-extending cutting edges thereon and spirally-extending material-guiding grooves therebetween and having a diameter and an axial length slightly larger than the corresponding diameter and axial length of the head portion of the screw to enlarge the hole to receive the head portion of the screw, and a still further enlarged intermediate cylindrically-shaped beveled cutting portion to the rear of said cylindrical cutting portion for shaping the face of the plate surrounding the hole.
Claim 2
Dependent Claim
166 words
A reamer adapted to be driven by a rotary machine to enlarge a hole in a plate to accommodate a socket-head screw having a head portion and a shank portion, comprising: an elongated rodlike member including a rear end portion adapted to be removably and drivingly attached to the machine, a front noncutting cylindrical portion having a diameter slightly less than the diameter of the hole to serve as a guide therein and having an axial length substantially less than the axial length of the hole, an intermediate enlarged cylindrical cutting portion having spirally-extending cutting edges thereon and spirally-extending material-guiding grooves therebetween and having a diameter and an axial length slightly larger than the corresponding diameter and axial length of the head portion of the screw to enlarge the hole to receive the head portion of the screw, and a still further enlarged intermediate cylindrically-shaped beveled cutting portion to the rear of said cylindrical cutting portion for shaping the face of the plate surrounding the hole.
Claim 3
Dependent Claim
22 words
A reamer according to claim 1, wherein said front portion terminates a relatively short axial distance from said intermediate enlarged cutting portion.
Claim 4
Dependent Claim
38 words
A reamer according to claim 2, wherein said cutting edges extend continuously and spirally axially only about said cutting portion and about said beveled cutting portion, said grooves extending continuously about said front portion and said intermediate portions.
Claim 5
Dependent Claim
38 words
A reamer according to claim 1, wherein said cutting edges extend continuously and spirally axially only about said cutting portion and about said beveled cutting portion, said grooves extending continuously about said front portion and said intermediate portions.