Patent ID: 8453884

Claim:
A liquid dispensing apparatus comprising: a receptacle defining a chamber for containing a liquid material and having a top opening; and a press mechanism including a sealing valve disposed movably in said chamber and covering said top opening, and a press seat disposed above said sealing valve to move said sealing valve in said chamber, said sealing valve having a deformable membrane facing an interior of said chamber and adapted to press the liquid material, said press seat having a base plate, and a press rod projecting downwardly from said base plate and having a lower end connected to said deformable membrane, wherein said deformable membrane deforms when pressed by said press rod, and produces a suction force when returning to an original shape; wherein said deformable membrane has a dome shape, is convex, and protrudes upward, said lower end of said press rod being connected to a topmost part of said deformable membrane; and wherein said sealing valve further has a peripheral wall extending upward from an outer periphery of said deformable membrane and abutting against an inner wall face of said receptacle, said deformable membrane having a maximum height measured from a plane of said outer periphery of said deformable membrane that is larger than a spacing between a top end of said peripheral wall and said base plate.