| 摘要 |
A device (10) for filling a pneumatic tire and sensing the air pressure therein has a check valve (22) disposed within a valve stem (14) and a pressure sensing switch (66) and which is temperature compensated to adjust for air pressure changes within the tire due to changes in ambient temperature. Substantially perfect compensation can be achieved, within a limited range of operation, whereby the set point pressure versus temperature characteristic will track with the related tire pressure versus temperature characteristic. A manual set point adjustment feature is provided whereby the switch can be calibrated after it is assembled within a wheel and pneumatic tire. The switch can also be employed independently of, as well as in conjunction with, the check valve. |
