Patent ID: 8916777

Claim:
A gasket system for a conduit and junction box dust-tight seal assembly; wherein the seal assembly comprises a two-piece split clamp having a shaft portion adapted to fit around a conduit, a flange portion on each piece of the split clamp adapted to secure the split clamp together around the conduit, a locknut cavity portion adapted to receive a locknut inside the clamp, and a lip portion adapted to be the bottom of the clamp and positioned beneath the locknut and adjacent a surface of a junction box; the gasket system comprising: a shaft gasket comprising a unitary sheet of compressible material wherein the sheet has a height and a length, the height is at least approximately equal to the height of the shaft portion of the split clamp, and the length is greater than the circumference of the conduit around which the clamp is mounted, whereby the shaft gasket overlaps onto itself when the clamp is mounted around the conduit.