Patent ID: 7757550

Claim:
A valve stem comprising a tire pressure detector having an electric module being mounted inside the tire pressure detector; a surface; and a guiding slot being formed through the tire pressure detector and forming two openings on the surface of the tire pressure detector; a concave surface being formed on the surface of the tire pressure detector adjacent to one of the openings; and a convex surface being formed on the surface of the tire pressure detector adjacent to the other one of the openings; a valve stem body being movably mounted through the guiding slot, being conductive and having an outer section having an outer surface and a thread being formed on the outer surface of the outer section; and an inner section being integrally and coaxially formed on the outer section and having a distal end and a head being formed on the distal end of the outer section; a conducting member being electric conductible, being electrically connected with the electric module, being mounted on the surface of the tire pressure detector adjacent to one of the openings of the guiding slot and having a member slot being formed through the conducting member and being shaped as and disposed corresponding to the guiding slot; and a fastening assembly having a sealer being mounted on the outer section of the valve stem body; and a nut being rotatably mounted on the thread of the outer section of the valve stem body.