Patent ID: 7125019
Filing Date: 2006-10-24
Classification: F16J,Y10S

Abstract:
1. A single seal assembly for the sealing of a rotary shaft extending through a wall of a housing and, seal off a chamber inside the housing from outside the wall, said seal assembly comprising a flange adapted to be mounted on the wall, an outer sealing ring and an inner sealing ring disposed on the shaft within the chamber inside the housing, said sealing rings being in sliding and sealing contact with each other, the outer sealing ring being fastened to the flange, the inner sealing ring surrounding said shaft and being secured to an axially extending member, said axially extending member being fastened with and rotating with the shaft, and extending through the flange into the chamber, wherein the axially extending member is subjected to pressure in said chamber for producing a pulling force acting in a direction to pull the inner ring against the outer ring to increase contact between the sealing rings while developing a torque to drive the inner sealing ring with said shaft in common rotation, wherein said axially extending member is a slitted sleeve which comprises circular segments connected to each other by lands, said lands being alternately located so that the sleeve is elastically extendable.