Appeal No. 97-3210
Application No. 08/386,388
adapted to be positioned within the inner diameter of the
contact surfaces and forming a seal to prevent leakage of
internal pressure into the area outside of the primary seal
between the first and second connection members, and
a generally ring-shaped secondary barrier seal
positioned concentrically around said primary seal
and between said first and second connection member
contact surfaces to prevent entry of external
pressure to the area encompassed by the secondary
barrier seal . . . .
Redder discloses a rotating shaft assembly that
interfaces with a stationary support structure, upon which the
shaft bearings are mounted. A system is provided lubricating
the bearings by the periodic injection of lubricant under
pressure, which includes a rotating metal ring seal 19 mounted
on the rotating shaft and a stationary metal ring seal 20
mounted on the stationary member. The annular edges of the
two ring seals are in sliding contact, and they prevent the
escape of lubricant between the rotating and stationary
portions of the machine. The examiner has designated seals 19
and 20 as the claimed primary seal, and seal 34 as the
secondary seal ring.
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Last modified: November 3, 2007