Patent ID: 6338491
Filing Date: 2002-01-15
Classification: F16D,F16J,Y10S

Abstract:
A sealing arrangement for creating a rotary seal between a first rotating shaft having an exterior cylindrical surface and a second stationary support having an interior cylindrical surface within which the rotating shaft is located, one of the first rotating shaft and second stationary support having a stepped circumferential groove having a first diameter portion and a second diameter portion, the arrangement comprising:a first circular seal fabricated from a first material having a coefficient of thermal expansion substantially greater than the first rotating shaft and the second stationary support and positioned in the first diameter portion; and a second circular seal fabricated from a second material having a coefficient of thermal expansion substantially the same as at least the first rotating shaft and positioned in the second diameter portion, wherein the first and second circular seals are positioned in a side-by-side relationship within the stepped circumferential groove.