Patent ID: 7806635

Claim:
A tool for working a workpiece, the tool comprising: an elongate member comprising: (i) a central axis defining axial, angular, and radial directions, (ii) first and second ends, (iii) at least two extremities located at the first end, at least one of the at least two extremities comprising at least one blade member, wherein the at least two extremities are operable to separate in response to a pressurized medium, (iv) a conduit, wherein the conduit is in fluid communication with the extremities, and (v) a pair of vents in fluid communication with the conduit, wherein the vents are operable to expel fluid communicated through the conduit, wherein a first portion of the conduit is proximal of the pair of vents, wherein a second portion of the conduit is distal of the pair of vents; and (b) a cam member comprising an inner surface defining an opening, wherein the opening is configured to receive at least a portion of the elongate member, wherein the inner surface of the cam member has a generally tapered profile.