Patent ID: 6220601
Filing Date: 2001-04-24
Classification: F16J

Abstract:
A mechanical face seal device including a pair of co-operating annular seal members which are movable relatively to each other in an axial direction, one of said annular seal members being stationary and adapted for mounting in a non-rotational relationship on a stationary component, whilst the other annular seal member being rotary for common rotation with a rotary component, a biasing means for applying a biasing force between the rotary annular seal member and the stationary annular seal member, and a bellows assembly comprising a bellows member of resilient material having axially spaced mounting portions interconnected with each other through an intermediate foldable portion, one of said mounting portions being adapted for mounting on the rotary component whilst the other mounting portion being mounted in torque transferring relationship to said rotary annular seal member, and an essentially stiff support member disposed between said foldable portion of the bellows member and said rotary annular seal member, said bellows assembly further comprising a driving housing means having a pair of axially spaced force transferring portions one of said force transferring portions being mounted in force transferring relationship to said one of said mounting portions for transferring a driving force to said bellows member, and the other force transferring portion being mounted in force transferring relationship to said other mounting portion of said bellows member, wherein said one of said force transferring portions has a radial inner dimension which is less than a maximum radial outer dimension of said support member and greater than a maximum radial outer dimension of said rotary annular seal member.