Liquid dispensing device

Abstract

A liquid dispensing device includes a resilient receptacle for receiving a liquid and attached to a cover device and having an accordion structure for providing a resilience to the receptacle and for forcing the liquid out of the receptacle, and a controlling device for controlling the liquid to flow out of the cover device, the receptacle includes two or more folds each having an upper peripheral wall inclined downwardly and outwardly, and a lower peripheral wall inclined downwardly and inwardly and more inclined relative to the upper peripheral wall, for allowing the peripheral walls of the folds to be folded toward each other to a compact folding structure.

1 . A liquid dispensing device comprising:
 a cover device,   a resilient receptacle for receiving a liquid and attached to said cover device, and including an accordion structure for providing a resilience to said receptacle and for forcing the liquid out of said receptacle and into said cover device by the resilience of said receptacle, and   means for controlling the liquid to flow out of said cover device,   said receptacle including a first fold having an upper peripheral wall inclined downwardly and outwardly and inclined relative to a horizontal plane, and a lower peripheral wall inclined downwardly and inwardly and inclined relative to the horizontal plane, and including at least one second fold located above said first fold and having a lower peripheral wall inclined downwardly and inwardly and inclined relative to the horizontal plane, and   said upper peripheral wall of said first fold being foldable upwardly toward said lower peripheral wall of said at least one second fold when the liquid is gradually consumed, and said lower peripheral wall of said first fold being moveable upwardly toward said upper peripheral wall of said first fold when the liquid is further gradually consumed.   
   
   
       2 . The liquid dispensing device as claimed in  claim 1 , wherein said receptacle is made of polyethylene material. 
   
   
       3 . The liquid dispensing device as claimed in  claim 1 , wherein said receptacle is made of polypropylene material. 
   
   
       4 . The liquid dispensing device as claimed in  claim 1 , wherein said first fold of said receptacle includes an included angle of eighty four (84) degrees between said upper peripheral wall and said lower peripheral wall of said first fold. 
   
   
       5 . The liquid dispensing device as claimed in  claim 1 , wherein said lower peripheral wall of said first fold is more inclined relative to said upper peripheral wall of said first fold. 
   
   
       6 . The liquid dispensing device as claimed in  claim 1 , wherein said lower peripheral wall of said first fold includes an included angle of forty five (45) degrees relative to a horizontal plane. 
   
   
       7 . The liquid dispensing device as claimed in  claim 1 , wherein said upper peripheral wall of said first fold includes an included angle of thirty nine (39) degrees relative to a horizontal plane. 
   
   
       8 . The liquid dispensing device as claimed in  claim 1 , wherein said cover device includes a casing provided therein and having a compartment formed in said casing for receiving the liquid forced out of said receptacle, and said receptacle includes a peripheral flange for attaching to said cover device. 
   
   
       9 . The liquid dispensing device as claimed in  claim 8 , wherein said casing includes a bottom wall having an orifice formed therein, a check valve attached to said casing for selectively blocking said orifice of said bottom wall of said casing. 
   
   
       10 . The liquid dispensing device as claimed in  claim 8 , wherein said controlling means includes a plug disposed in said casing of said cover device and having an bore formed in said plug and communicating with said compartment of said casing, and a tube slidably engaged through said bore of said plug and having a valve member for blocking said bore of said plug and for selectively opening said bore of said plug when said valve member of said tube is disengaged from said plug. 
   
   
       11 . The liquid dispensing device as claimed in  claim 10 , wherein said tube includes a blind hole formed therein, and at least one opening formed therein for allowing the liquid to flow through said at least one opening of said tube and to flow into said bore of said plug when said valve member of said tube is disengaged from said plug. 
   
   
       12 . The liquid dispensing device as claimed in  claim 10 , wherein a knob includes a conduit formed therein and having a mouth for allowing the liquid to flow out through said mouth, said tube is engaged into said conduit of said knob for allowing the liquid to flow from said tube into said conduit of said knob and to flow out through said mouth of said knob. 
   
   
       13 . The liquid dispensing device as claimed in  claim 12 , wherein a spring member is disposed between said knob and said cover device for biasing said knob to move away from said cover device and for biasing said valve member of said tube to block said bore of said plug. 
   
   
       14 . The liquid dispensing device as claimed in  claim 1 , wherein a container is attached to said cover device and includes a chamber formed therein for receiving said receptacle.