No-spill drinking cup apparatus

CAFC
  • US 7,243,814 B2
  • Filed: 02/25/2002
  • Issued: 07/17/2007
  • Est. Priority Date: 08/21/1997
  • Status: Expired due to Fees
First Claim
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1. An apparatus, comprising:

  • a no-spill drinking apparatus, said apparatus comprising an air vent and a valve, said valve comprising a post and a flexible material, said flexible material comprising an opening, said post extending into said opening, said valve having a closed position and in an open position,said closed position being a configuration in which liquid is blocked from passage through said opening,said open position being a configuration in which liquid can pass through said opening,wherein air passes into said apparatus through said air vent and said valve moves from said closed position to said open position upon application of negative pressure to said flexible material, and wherein said flexible material inverts upon said application of negative pressure to said flexible material.

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