Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
May 3, 2011
Patent Application Number
12047227
Date Filed
March 12, 2008
Patent Citations Received
Patent Primary Examiner
Patent abstract
A prior art backflow bonnet and poppet is replaced by a functionally equivalent new bonnet and poppet. The new bonnet and poppet reduces risk of freeze damage with about a 50% greater strength against pressure. The new bonnet and poppet has only three parts when assembled versus six parts in the prior art. A hollow in the valve plug holds the biasing spring. The bonnet shaft rides in the hollow.
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