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Snorkel mast for a semi-submersible vehicle

  • US 4,611,551 A
  • Filed: 12/14/1984
  • Issued: 09/16/1986
  • Est. Priority Date: 12/14/1984
  • Status: Expired due to Fees
First Claim
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1. A snorkel valve closure mechanism comprising a valve seating member mounted at the open end of an inverted U-shaped snorkel head pipe section;

  • a butterfly valve pivoted at said open end;

    a bell-crank lever pivotally mounted on said snorkel head pipe section above said valve seating member;

    a connecting operating link between said bell-crank lever and said butterfly valve;

    float means at one end of said bell-crank lever and water impact flap means at the other end of said bell-crank lever whereby said butterfly valve may be pivoted into valve closing engagement with said seating member by the action of water flowing past said valve mechanism or by a float lifting action of water lever relative to said float means.

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