| 摘要 |
<p>An inflation pressure indicator (100) for pneumatic tyres for vehicles has a body (101) mountable on a wheel rim (149) to which a tyre is fitted. A piston (122) is slidably mounted in a bore (102) in the body (101), and, at a preselected pressure, moves in the bore (102) against the compression spring (125) to a position adjacent a datum line (136) on the body (101). A tyre valve (130) is fitted to the piston (122) to enable the tyre to be inflated or deflated, when an air hose fitting is connected to the body (101). By selective injection moulding of the body (101) from polycarbonate, the length of the body (101) will increase with increased heat so that the indicator (100) will correctly indicate the cold tyre pressure when the tyre is hot.</p> |
