| 摘要 |
An apparatus mounted on a valve for indicating tire pressure comprising a pressure indicator including a downward pipe having an inner thread, a hollow downward cylinder projected into the pipe, the cylinder having a bottom opening, a mainspring having one end coupled to the cylinder, the mainspring being capable of pivoting as air passes through the opening, and a pointer coupled to the other end of the mainspring. In a mounted state of pressure indicator and valve, the inner thread of the downward pipe is secured to the valve and the cylinder is urged against the valve to form an air path from the tire to the mainspring through the valve and the opening for the pivoting pointer.
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