초록 ▼

A backflow valve which includes a closure gate pivotally mounted along a substantially vertical pivot axis to one of the opposed sides of the valve body. A closure gate engaging profile positioned in a bottom of the valve body locks the closure gate in the open position. The closure gate is biased i

A backflow valve which includes a closure gate pivotally mounted along a substantially vertical pivot axis to one of the opposed sides of the valve body. A closure gate engaging profile positioned in a bottom of the valve body locks the closure gate in the open position. The closure gate is biased into the closed position. The closure gate moves to the closed position upon floating free of the closure gate engaging profile.

대표청구항 ▼

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.]1. A backflow valve, comprising:a valve body adapted for use in a substantially horizontal orientation, the valve body having a top, a bottom, and opposed sides;a flow passage exten

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.]1. A backflow valve, comprising:a valve body adapted for use in a substantially horizontal orientation, the valve body having a top, a bottom, and opposed sides;a flow passage extending through the valve body, the flow passage having a longitudinal axis;a closure gate with an integral float pivotally mounted along an offset substantially vertical pivot axis to the valve body for movement between an open position in which the closure gate is positioned on a plane substantially parallel to the longitudinal axis of the flow passage and a closed position in which the closure gate is positioned transverse to the longitudinal axis, the pivot axis being sufficiently offset from vertical as to bias the closure gate into the closed position, the closure gate being capable of limited axial movement along the vertical pivot axis;a closure gate engaging lock adapted to lock the closure gate in the open position, the closure gate engaging lock having an engaging portion thereon, said flow passage having an engaging profile in the bottom of the valve body along one of the opposed sides, the closure gate being locked in the open position by the closure gate engaging profile, the float causing the closure gate to move along the vertical pivot axis and float free of the closure gate engaging profile in the bottom of the valve body as water rises as water rises to a predetermined level due to backflow conditions.