(under the class definition) Apparatus comprising a chamber into which the shaft* extends and which is substantially sealed around the shaft* and which contains a fluid acting to prevent leakage of fluid along the shaft*, there being an abutment surface connected to and rotating with the shaft* and serving to maintain the sealing fluid in the chamber in motion.
SEE OR SEARCH CLASS
277, Seal for a Joint or Juncture, for a generic sealing means or process (e.g., seal between a runner* and another relatively movable part, seal between the two relatively moving members, does not recite enough details of the rotary kinetic device, etc.),
427+, for a dynamic close proximity seal (e.g., contactless, fluent, etc.) having an impeller or another rotating member to form a centrifugal liquid barrier.
