Patent ID: 7879226

Claim:
A flow indicator for showing blocking of filter cotton being used on a pipe line for a spraying head for showing blocking of said filter cotton in a filter in connecting with a submerged pump for said spraying head, said flow indicator comprises: a tri-branch tube, having a straight tube of which two ends are respectively connected to said pipe line of said spraying head, said straight tube is provided in its middle with an intermediate tube; a pusher rod provided in said intermediate tube, a tailing end thereof is extended into said straight tube and is formed as a bevel plate facing in inclination to impact with the flow of water in order to detect water pressure in said straight tube and thus be moved; a housing composed of an upper lid and a lower lid, a connecting tube is extended out of said lower lid to connect with said intermediate tube; a indicating lamp device provided on said housing and facing upwards; an electric power source provided in said housing to provide electric power for said indicating lamp device, while an igniting switch is provided to control turning on/off said indicating lamp device; and a triggering device provided in said housing, and moved by said pusher rod to trigger and move said indicating lamp device; wherein when said filter cotton of said filter is not blocked, said pusher rod detects a water pressure in said straight tube and pushes said triggering device to make said indicating lamp device keep in its off state; however, when a filter cotton of said filter is blocked, said pusher rod detects that no water pressure is in said straight tube and does not push said triggering device, thereby said indicating lamp device is lightened.