Patent ID: 9505634
Filing Date: 2016-11-29
CPC Classification: C02F

Claim Text:
1. A “warning device dedicated for replacing aged-filter in a handheld showerhead” comprises a showerhead stem, an impeller mount, an impeller, a signal circuit device and a transparent lid in addition to conventional handheld showerhead containing a detachable filter cartridge cylinder, wherein said showerhead stem, which is an integral plastic hollow casing body with a front side, a back side, a top side a bottom side and two flanks by unitary piece extrusion mold, includes a mounting cavity, an upper adapting section, a lower adapting section, a water channel, an impeller well and a recharging receptacle, wherein the mounting cavity is inwardly created in the front side, the upper adapting section is inwardly created in the top side, the lower adapting section is outwardly created on the bottom side, the water channel is internally created between the upper adapting section in the top side and the lower adapting section on the bottom side, the impeller well is inwardly created at the intersection of the bottom side and the water channel, and the recharging receptacle is inwardly created in one flank; said impeller mount, which is a slab with a front side and a bottom side for being inserted into the impeller well of the showerhead stem, includes a rotation axle disposed on the front side, and a water directing lump disposed on the front side near the bottom side such that the width of the water directing lump is less than the width of the front side so that the a water directing channel is created between the water directing lump and water channel after the impeller mount having inserted into the impeller well of the showerhead stem; said impeller, which is windmill-shaped wheel with multiple radial vanes, includes a magnetic element disposed on one vane and a central axial bushing run through for coupling with corresponding rotation axle on the front side of the impeller mount to let the impeller rotate freely; said signal circuit device, which is contained in the mounting cavity of the showerhead stem, includes a microprocessor, a LCD display circuit electrically connected to the microprocessor, a rechargeable battery electrically connected to the microprocessor, and a magnetic reed switch securely inset on the internal bottom side of the mounting cavity in the showerhead stem such that the rechargeable battery is electrically connected with the recharging receptacle of the showerhead stem via a pair of electric wires; and said transparent lid is made of plastic material via high frequency fusion method to hermetically watertight cover the mounting cavity in the showerhead stem.