Patent ID: 7721827

Claim:
A sealing system for a drill bit including a bit head and a rotating bit cone, comprising: a seal gland defined by a radial cone surface and further defined by a cylindrical head sealing surface and a conical cone sealing surface opposed to the cylindrical head sealing surface and formed on the rotating bit cone; a seal radially compressed between the cylindrical head sealing surface and the opposed conical cone sealing surface; wherein the conical cone sealing surface is connected at a first end directly to the radial cone surface and further extends radially inwardly from the radial cone surface and an angle defined between the conical cone sealing surface and the opposed cylindrical head sealing surface is about between 2 and 40 degrees; and a radially projecting feature extending inwardly from a second end of the conical cone sealing surface, wherein the radially projecting feature comprises an inwardly sloping surface feature.