Patent ID: 8646477

Claim:
A structure of valve stem and frame lining, including: a frame lining, having a first face and an opposite second face, the first face extending along a longitudinal direction of the frame lining and becoming an annular face, at least two ribs being formed on the second face of the frame lining, each rib extending along the longitudinal direction of the frame lining and having a predetermined distance from a center of a width of the second face, the ribs being able to abut against corners of a wheel frame to position the frame lining to the wheel frame; a valve body with a predetermined length, having a first end and an opposite second end, the valve body forming an air channel penetrating the valve body from the first end to the second end, the first end of the valve body being engaged with the first face of the frame lining by molding to provide good sealing and strength of structure, the first end of the valve body having a base portion which is embedded inside the annular face and is not protruded outside of the annular face to provide firm engagement between the valve body and the frame lining; a stem with a predetermined length, being disposed in the air channel to control availability of air through the air channel.