Ball valve having valve chamber venting seal assem

专利名称：Ball valve having valve chamber venting seal

assemblies

发明人：Domer Scaramucci申请号：US06/003379申请日：19790115公开号：US04254793A公开日：19810310

摘要：A ball valve is disclosed wherein seal assemblies, extending about flow passagesin the body of the valve to either side of a valve chamber containing the ball, areconstructed to vent excess pressure in portions of the valve chamber cut off from theflow passages by the sealing of the seal assemblies to the ball and to the valve bodywithout the need for backing the seal assemblies away from the ball. For this purpose,the seal between the valve body and each seal assembly is formed by an elastomericbiasing ring which is bonded on one side to the valve body or to other portions of theseal assembly and has an opposite, free side engaging the other of the valve body orother portions of the seal assembly. The biasing ring is positioned on a side of the sealassembly opposite the ball and fluid pressure in the cut off portion of the valve chamberis transmitted about the seal assembly to the free side of the biasing ring for ventingthereacross into a flow passage. The biasing ring is axially compressed between the valvebody and other portions of the seal assembly to urge the other portions of the sealassembly against the ball.

申请人：SCARAMUCCI; DOMER

代理机构：Dunlap, Codding & McCarthy

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