Patent ID: 7011293

Claim:
A water-saving device for a faucet, comprising: a hose adapted to supply water to the faucet; and a control assembly connected to said hose and adapted to be located upstream of the faucet, said control assembly including: a housing having an inlet port, an outlet port, a passage extending between and in fluid communication with said inlet and outlet ports, and a valve seat disposed in said passage, a plunger mounted movably within said housing, and having a valve portion to be seated on said valve seat, and an end portion which is opposite to said valve portion and which extends outwardly of said housing, an operation unit connected to said end portion of said plunger, and a biasing unit disposed in said housing and biasing said valve portion, wherein said biasing unit moves said valve portion to a closing position in which said valve portion is seated against said valve seat, and said operation unit moves said valve portion to an open position in which said valve portion is moved away from said valve seat, wherein said biasing unit is configured as a compression spring which has a first end fixed to said housing and a second end abutting against said valve portion so as to push said valve portion against said valve seat and to push outwardly said end portion of said plunger, wherein said housing has a through hole communicated with said passage to receive and permit said end portion of said plunger to extend out of said housing, and a wall confining said through hole, said end portion being in sliding contact with said wall and having a sealing ring which is disposed around said end portion and between said end portion and said wall, and wherein said plunger has a stem portion connected between said end portion and said valve portion, said valve portion having a tapered section connected to said stem portion, an enlarged section formed at one side of said tapered section opposite to said stem portion, and a slanted shoulder connected between said tapered section and said enlarged section and converging from said enlarged section to said tapered section, said slanted shoulder being in contact with said valve seat when said valve portion is in said closing position.