Tire valve assembly

A tire valve assembly comprising:

• a stem having a first section, a second section and a third section, the second section formed between the first section and the third section, the first section including a through passage defined axially therethrough, the second section including a chamber defined therein which communicates with the through passage, a flange extending radially and inward from a conjunction portion between the through passage and the chamber, and
• a valve unit including a movable part and a seal member, the movable part movably located in the through passage and the chamber, the movable part including a first end, a mediate portion and a second end, the mediate portion formed between the first and second ends of the movable part, the first end of the movable part including an inlet, multiple lips extending from an outside of the first end of the movable part, the second end of the movable part including a hole which is located surrounded by multiple claws, the mediate portion including multiple slots defined radially through a wall thereof, the slots communicating with the inlet and the hole of the movable part, the seal member engaged with the movable part and including a head and a sealing portion, the head being engaged with the claws and sealing the hole of the second end of the movable part, the sealing portion located in the chamber, when the valve unit moves toward the chamber, the lips are stopped by the flange, the slots communicate with the chamber, when the valve unit moves toward the through passage, the sealing portion is stopped by the flange, the slots do not communicate with the through passage.