Patent ID: 8221017

Claim:
A fluid applicator, comprising: a tubular container having a top open end and a bottom open end opposite to said top open end; a floating stopper mounted in said tubular container and adapted to seal said bottom open end; a fluid filled in said tubular container in between said top open end and said bottom open end; and a plug for closing the top open end of said tubular container; and wherein when said plug is opened from said top open end of said tubular container for allowing the atmospheric pressure to enter said top open end, said floating stopper is forced to adhere to the peripheral wall of said tubular container for allowing said fluid to flow out of said bottom open end; when said plug seals said top open end of said tubular container, the atmospheric pressure is prohibited from entering said top open end, and said floating stopper stops said bottom open end again, said tubular container has an inside annular flange located on said top open end, said inside annular flange having a tapered inner diameter, said plug has a plug base for press-fitting into the tapered inner diameter of said inside annular flange tightly to seal the passage of said top open end, a split coupling bolt axially forwardly extended from a bottom end of said plug base and slidably coupled to said inside annular flange, a shoulder located on a top end of said plug base for stopping outside said top open end of said tubular container, and a head formed integrally with a top side of said shoulder opposite to said plug base.