Patent ID: 8240672

Claim:
An annular secondary seal gasket unit for a sealing device, comprising: an annular support ring comprising opposite first and second ring side surfaces which extend axially and face in opposite radial directions, and a support surface disposed at one end of said support ring, said support surface being canted at an acute angle relative to said first ring side surface; and an annular gasket fitted in close engagement with said second ring side surface, said gasket comprising a first groove which extends radially into said gasket to define a deflectable groove wall that is deflectable axially to form a first seal between said gasket and an opposing sealing surface, said gasket further including a second groove which extends at an angle into said gasket so as to be canted at an acute angle relative to said first ring side surface and define a canted groove wall which is deflectable toward said support surface and extends along said support surface of said support ring in supported engagement therewith, said canted groove wall extending radially past said support surface to define an unsupported sealing lip disposed radially beyond said first ring side surface for sealing contact with an opposing sealing surface of a component surface; and each of said first and second grooves including respective biasing members which respectively bias said first groove wall and said canted groove wall into sealing contact with a respective sealing surface.