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Liquid storage vessel venting system

  • US 5,358,009 A
  • Filed: 07/19/1993
  • Issued: 10/25/1994
  • Est. Priority Date: 11/06/1991
  • Status: Expired due to Term
First Claim
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1. A storage system for liquid comprising:

  • a receiving valve for the transfer of liquid into said storage system;

    a storage tank communicating with said receiving valve for receiving and storing said liquid;

    a check valve assembly communicating with said storage tank, said check, valve assembly comprising;

    a first check valve including a valve seat and a floating valve which allows air to pass around said floating valve as said storage tank is being filled with liquid and for closing said first check valve when said floating valve is buoyed by said water into said valve seat;

    a second check valve including a valve closure in communication with said first check valve, said second check valve only allowing air to flow out of said storage tank;

    a third check valve in communication with said first check valve, said third check valve including a valve closure only allowing air to flow into said storage tank; and

    an air filter for filtering the air passing through said third check valve into said storage tank.

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