Patent ID: 7264442

Claim:
A seal structure comprising: an annular retaining ring having a radially inner portion with a radial face which radial face is recessed, and a cylindrical seal carrier having a radially outwardly turned flange sized to nest in said recess with a radial clearance therebetween, said retaining ring being adapted for fixedly connecting to a face of a flange on a seal structure support means with said flange of said cylindrical seal carrier nested in said recess, so as to be retained against said flange of said seal structure support means by said retaining ring, wherein said seal carrier flange has rectangular cut outs in and equally angularly spaced about its rim and said retaining ring has correspondingly shaped and spaced proud portions on that face that abuts said flange of said seal structure support means, so as to enable cross key location of said seal carrier in said retaining ring.