Patent ID: 6766825
Filing Date: 2004-07-27
Classification: F16K,Y10T

Abstract:
In a ballcock valve of the type having a water supply riser mounted in a valve seat, a body atop said riser having a base and a removable cap attachable to said base whereby to form a chamber, valve workings inside said chamber removable when said cap is removed to give access to said seat and adapted selectively to open or to close said valve seat, the improvement comprising:a screen insertable into said riser through said seat so as to project into said riser, said screen including a screen body, a central flow passage in said screen body, passages opening into the riser to retain solid particulates in said riser and prevent their passage into said central passage, and a flow control held to said screen body in fluid communication with said central passage to limit the rate of water flow from the riser, a radial protuberance on said screen body releasably to hold the screen body to the valve body, said radial protuberance being a finger on said screen body, and in which an axial slit is provided in said body upstream of said valve seat, said screen body being rotatable in said valve body, whereby with the finger and slit aligned the screen body can be passed through said valve seat, and when fully inserted can be rotated past the slit, and the finger and screen body will then be retained against axial removal from the valve body, whereby with the cap and valve workings removed from the base, the screen body along with the flow control can be removed from the riser through the valve seat, and particulate solids flushed from the riser, after which a screen body and flow control can be inserted into the riser, and the valve workings and cap replaced to restore the ballcock valve to working condition.