Patent ID: 8083426

Claim:
A liquid dispenser comprising: a hollow shank for containing liquid, the hollow shank having a closed first end and a open second end, a first tapered hole centrally defined in the first end of the hollow shank and communicating with an inner periphery of the hollow shank; a dispensing device longitudinally mounted to the first end of the hollow shank, the dispensing device including: a positioning ring longitudinally mounted to the first end of the hollow shank and having multiple ribs longitudinally formed on an inner periphery thereof, the positioning ring including a distal end, opposite to the hollow shank, having a shoulder inward extending therefrom, a series of indentations with different heights defined in the shoulder between every two adjacent ribs; an adjuster extending through the positioning ring and engaged to the shoulder, the adjuster being rotatable relative to the positioning ring and the rotating radian of the adjuster equal to that between every two adjacent ribs, the adjuster reciprocally and longitudinally moved relative to the hollow shank when being rotated, a hole centrally defined in the adjuster, a first cone centrally extending from a bottom of the hole for selectively closing the first tapered hole, a skirt extending from the bottom of the hole and surrounding the first cone to define an annular groove, multiple channels defined in a bottom of the annular groove and communicating with a recess that is defined in a bottom of the adjuster, the adjuster having multiple ears outwardly extending therefrom, each ear engaged with a corresponding one of the multiple series of indentations; a holder extending through the positioning ring and longitudinally mounted to the adjuster, a through hole centrally defined in the holder; and a dispensing element extending through the through hole in the holder and mounted on the holder for dispensing the liquid from the hollow shank; a control device longitudinally mounted to the second end of the hollow shank for allowing the air flow into the hollow shank step by step and the dispensing element outputting the liquid when the air flows into the hollow shank; and a sheath longitudinally mounted to the first end of the hollow shank for protecting the dispensing device after use, the sheath having a hollow rod extending therefrom along an axis thereof for receiving the dispensing element, a free end of the hollow rod of the sheath longitudinally pushing the holder with the adjuster for forcing the first cone to close the first tapered hole when mounting the sheath.