Patent ID: 6883534
Filing Date: 2005-04-26
Classification: F16K,Y10T

Abstract:
1. A freezeless wall hydrant, comprising, a normally horizontal fluid inlet tube having an interior end and an exterior end and a single aperture located in a portion therebetween, a hollow valve fitting rigidly secured to the interior end of the inlet tube for connection to a source of pressurized fluid, a head member rigidly secured to the outer end of the inlet tube and including a drain conduit in communication with an interior of the inlet tube for discharging water from the hydrant, a normally closed pressure relief valve mounted exteriorly of the aperture and in communication with the interior of the inlet tube and being located between the interior and exterior ends of the inlet tube to directly seal the aperture exteriorly of the inlet tube such that if residual fluid within and adjacent the exterior end of the inlet tube freezes and exerts extraordinary pressure on residual fluid within the inlet tube adjacent the interior end thereof, the pressure relief valve will open immediately to release a portion of the residual water from the inlet tube to relieve the extraordinary pressure of the residual fluid through the aperture.