Swabable valve with curvilinear valve stem
AssigneeHalkey-Roberts Corporation
InventorStephen J. Rogier
Life of this patent
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Abstract
A swabable valve having a collapsible valve stem with a concave curvilinear upper surface extending from rim-to-rim of the valve stem, the concave curvilinear upper surface comprising a radius that is sufficient to prevent the collapsed valve stem from becoming lodged within the valve body upon collapsing thereby assuring that the collapsed valve stem will return to its closed position with the concave curvilinear upper surface substantially flush with the end of the valve.
Claims9
A swabable valve (10) comprising a valve stem (100) that collapses into a valve body (12), said valve body (12) including a cylindrical reduced diameter section (18) having a circular rim, said valve stem (100) having a cylindrical reduced diameter portion (38) that extends fully into said cylindrical reduced diameter section (18) of said valve body (12), said cylindrical reduced diameter portion (38) including a through-slit (52) that opens when said valve stem (100) collapses into said valve body (12), said valve stem (100) having a concave curvilinear upper surface (102) that is substantially flush with said circular rim of said cylindrical reduced diameter section (18) of said valve body when said valve stem (100) is not collapsed into said valve body (12);
- said concave curvilinear upper surface (102) of said valve stem (100) extending rim-to-rim within said cylindrical reduced diameter section (18) of said valve body (12).
Dependencies are inferred from the claim text.