Liquid atomizer

A liquid atomizer having a piston adapted to be reciprocally moved within a cylinder to suck up and pressurize a liquid, and a nozzle from which the pressurized liquid is atomized, said atomizer comprising:

• a liquid container containing the liquid to be atomized and having a neck portion formed at its upper end portion,
• a fixed cylinder having an upper large-diameter portion and a lower small-diameter portion, said cylinder being inserted into said container through the opening of said neck portion in such a manner as to extend from said neck portion toward the bottom of said container,
• a supporting member adapted to be fixed to said neck portion so as to make said neck portion hold said cylinder,
• a first piston adapted to be slidingly moved in the large-diameter portion of said cylinder,
• a first conduit pipe extending upwardly from said first piston to make said nozzle and the source in said large-diameter portion communicate with each other,
• a valve including a valve seat formed on said first conduit pipe and a cooperating valve body and adapted to open and close the passage of said first conduit pipe,
• a second piston connected to said valve body and adapted to be slidingly moved in said large-diameter portion of said fixed cylinder, said second piston being of the same diameter as said first piston and cooperating with said first piston in defining therebetween a valve chamber,
• a second conduit pipe connected to the lower end of said second piston and making the space in said small-diameter portion communicate with said valve chamber defined above said second piston,
• a third piston connected to the lower end of said second conduit pipe and adapted to be slidingly moved in said small-diameter portion,
• a spring disposed between said third piston and the lower end of said small-diameter portion and adapted to upwardly bias an operation body which consists of said valve body of said valve, said second piston, said second conduit pipe and said third piston,
• a suction pipe connected to the lower end of said small-diameter portion for sucking up the liquid into a pressurizing chamber defined by said cylinder and said operation body, and
• a check valve interposed between said suction pipe and said small-diameter portion and adapted to allow only the flow of the liquid directed to said pressurizing chamber,
• said second piston being larger than said third piston, whereby when the first piston is depressed, said valve provided on said second piston is opened as a result of the difference in area between said second piston and said third piston.