One-handle Type Faucet having a double anti-reverse function to prevent waste materials from flowing backward into the faucet when disaster happens

Abstract

A faucet includes a faucet body provided with a receiving chamber, a first outlet port and a second outlet port, a first check valve mounted in the receiving chamber of the faucet body and located between the first outlet port and the second outlet port of the faucet body, a water output unit mounted on the faucet body and having an inner portion provided with a receiving space connected to the second outlet port of the faucet body, and a second check valve mounted in the receiving space of the water output unit. Thus, the first check valve co-operates with the second check valve to form a double anti-reverse function to prevent the waste water from flowing backward into the water entrance of the faucet body so as to protect the water source of the faucet.

1 . A faucet, comprising:
 a faucet body having an inner portion provided with a receiving chamber and having a periphery provided with a first outlet port and a second outlet port each connected to the receiving chamber;   a first check valve mounted in the receiving chamber of the faucet body and located between the first outlet port and the second outlet port of the faucet body;   a water output unit mounted on the faucet body and having an inner portion provided with a receiving space connected to the second outlet port of the faucet body; and   a second check valve mounted in the receiving space of the water output unit.   
     
     
         2 . The faucet of  claim 1 , wherein the first check valve includes:
 a valve housing mounted in the receiving chamber of the faucet body and having an inner portion provided with a flow channel which is connected to the outlet port of the faucet body and has a peripheral wall provided with a flange;   a valve shaft movably mounted in the flow channel of the valve housing;   a sealing gasket mounted on the valve shaft to move in concert with the valve shaft and abutting a peripheral wall of the receiving chamber; and   a stopper mounted on the valve shaft to move in concert with the valve shaft and detachably abutting the flange of the valve housing to isolate the flow channel of the valve housing from the outlet port of the faucet body.   
     
     
         3 . The faucet of  claim 2 , wherein
 the faucet body is provided with a water entrance connected to the receiving chamber;   the valve housing of the first check valve has a surface provided with a plurality of transverse connecting openings each connected between the flow channel of the valve housing and the water entrance of the faucet body.   
     
     
         4 . The faucet of  claim 2 , wherein the valve housing of the first check valve has a peripheral wall provided with a retaining groove to receive an O-ring which presses the peripheral wall of the receiving chamber. 
     
     
         5 . The faucet of  claim 2 , wherein the valve shaft of the first check valve has a first end provided with a first mounting portion for mounting the stopper and has a second end provided with a second mounting portion for mounting the sealing gasket. 
     
     
         6 . The faucet of  claim 1 , wherein
 the receiving space of the water output unit has a peripheral wall provided with a socket;   the second check valve includes:   a slide movably mounted in the receiving space of the water output unit;   a plug mounted on the slide to move in concert with the slide and detachably inserted into the socket of the water output unit to interrupt a connection between the receiving space of the water output unit and the second check valve;   a mounting tube mounted on the water output unit and spaced from the slide; and   an elastic member biased between the mounting tube and the slide to push the plug toward the socket of the water output unit.   
     
     
         7 . The faucet of  claim 6 , wherein
 the mounting tube of the second check valve has an inner portion provided with a flow conduit connected to the receiving space of the water output unit;   the receiving space of the water output unit is connected between the second outlet port of the faucet body and the flow conduit of the mounting tube.   
     
     
         8 . The faucet of  claim 6 , wherein the mounting tube of the second check valve has a first end provided with a first outer thread engaging the lower end of the water output unit and a second end provided with a second outer thread engaging the connector of the spraying unit. 
     
     
         9 . The faucet of  claim 8 , wherein the mounting tube of the second check valve has a mediate portion provided with a stop shoulder located between the first outer thread and the second outer thread for mounting an O-ring which presses a peripheral wall of the receiving space. 
     
     
         10 . The faucet of  claim 7 , wherein
 the slide of the second cheek valve has a first end provided with a recessed mounting section for mounting the plug;   the slide of the second check valve has a second end which has an inner portion provided with a plurality of longitudinal connecting channels and has a surface provided with a plurality of transverse connecting slots connected to the longitudinal connecting channels.   
     
     
         11 . The faucet of  claim 10 , wherein the longitudinal connecting channels and the transverse connecting slots of the slide are connected between the receiving space of the water output unit and the flow conduit of the mounting tube. 
     
     
         12 . The faucet of  claim 3 , wherein
 the receiving chamber of the faucet body is connected between the water entrance, the first outlet port and the second outlet port of the faucet body;   the water entrance, the first outlet port and the second outlet port of the faucet body are isolated from each other and are connected by the receiving chamber of the faucet body.   
     
     
         13 . The faucet of  claim 2 , wherein
 the flow channel of the valve housing is connected between the receiving chamber and the outlet port of the faucet body;   the receiving chamber of the faucet body is connected between the flow channel of the valve housing and the second outlet port of the faucet body.   
     
     
         14 . The faucet of  claim 2 , wherein the stopper of the first check valve has a tapered shape and is located between the flange of the valve housing and the outlet port of the faucet body. 
     
     
         15 . The faucet of  claim 3 , wherein the sealing gasket of the first check valve is located between the receiving chamber of the faucet body and the flow channel of the valve housing to isolate the second outlet port of the faucet body from the water entrance of the faucet body. 
     
     
         16 . The faucet of  claim 3 , wherein
 the sealing gasket of the first check valve has a tapered thin wall pressing the peripheral wall of the receiving chamber to isolate the receiving chamber and the second outlet port of the faucet body from the flow channel of the valve housing and the water entrance of the faucet body;   the tapered thin wall of the sealing gasket has a substantially V-shaped cross-sectional profile;   the tapered thin wall of the sealing gasket is flexible and contractible radially and inwardly to detach from the peripheral wall of the receiving chamber to connect the receiving chamber of the faucet body to the flow channel of the valve housing.   
     
     
         17 . The faucet of  claim 1 , wherein
 the water output unit is located between the second outlet port of the faucet body and the second check valve;   the receiving space of the water output unit is connected between the second outlet port of the faucet body and the second check valve.   
     
     
         18 . The faucet of  claim 6 , wherein the slide of the second check valve is located between the socket of the water output unit and the mounting tube.