Patent ID: 7284325

Claim:
A tool for cutting the inner surface of a tube comprising: a. at least one cutting bit comprising: (i) a tool axis; (ii) at least one tip formed by the intersection of at least a first plane, a second plane and a third plane; (iii) a cutting edge; and (iv) a lifting edge; b. a housing adapted to house at least a part of the at least one cutting bit; c. a spacer positioned at least partially within the housing, wherein the spacer is adapted to apply pressure to a first surface of the at least one cutting bit to cause at least a portion of the at least one tip of the at least one cutting bit to protrude from the housing when forces are exerted on the spacer; and d. a spring positioned at least partially within the housing, wherein the spring is adapted to expand when the forces relax to exert an expansion force on a second surface of the at least one cutting bit to allow retraction within the housing of the at least a portion of the at least one tip.