Patent ID: 8596560

Claim:
A check valve in a spray nozzle assembly, comprising: a body having an upstream end for receiving a liquid source and a downstream end for engaging a spray nozzle with a bore running continuously and parallel to an axis of said check valve through said body of said check valve and said spray nozzle from the upstream end to the downstream end; a first component of said bore adjacent the upstream end of said body; a second component of said bore adjacent the downstream end of said body, said first component having a small diameter than a diameter of said second component; a valve seat at a junction of said first component and said second component; a valve assembly located substantially in said second component and having a valve member with a curved end directed toward said valve seat; biasing means for holding said valve member against said valve seat until pressure at an inlet of said valve assembly attains a predetermined minimum pressure; and, releasable retaining means located in said second component of said bore and about said biasing means for retaining said valve assembly within said body via bayonet fittings engaging an interior of said valve body, the interior of said valve body having sloping or ramping side walls.