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ANNULAR VALVE

  • US 20130205986A1
  • Filed: 02/09/2012
  • Published: 08/15/2013
  • Est. Priority Date: 02/09/2012
  • Status: Abandoned Application
First Claim
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1. An annular valve comprising an annular valve member and inner and outer valve seats, the annular valve member having a seat-facing surface which faces the annular valve seats, either the seat-facing surface of the annular valve member or the inner valve seat comprising an annular inner sealing ridge, either the seat-facing surface of the annular valve member or the outer valve seat comprising an annular outer sealing ridge, wherein the inner sealing ridge is more resistant to plastic deformation than the outer sealing ridge.

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