Importance

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Abstract

A valve body has a larger bore and a smaller bore defining a transverse valve seat; and a plug closes the larger bore, the inner end confronting the valve seat and defining a radially enlarged valve chamber. The valve closure member comprises an enlarged head seating on the valve seat and an integral stem projecting from the discharge end of the valve. The plug has an axial recess opening toward the valve seat; and a control member comprises an enlarged head and an integral stem. A helical biasing spring is received over the control member stem; and the stem and spring are received within the plug recess to permit free axial movement over the valve closure member and free compression and expansion of the spring. The control member, which engages the closure member head to seat the closure member, has small lateral clearance with associated parts to severely restrict lateral movement of the control member and of the spring. When used with a drinker cup, the closure member stem of the valve projects axially into the cup; and a weighted valve operator disposed over the free end of the stem and extending laterally beyond the valve housing, assists newly hatched chicks to actuate the stem to open the valve. A ball check valve prevents siphoning of water from the drinker cup back through the valve.

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First Claim