| 摘要 |
A valve structure for inter-connecting the tyres of a set of dual tyres to equalize the pressures therein including a casing (10) having therein a cylinder (14) at one end of which is a valve seat. A piston (20) carrying a valve closure element (28) is spring urged towards said seat and the interiors of the tyres communicate with the chamber 14 via passages (18, 30) so that the air pressures therein may be used to hold said element away from the seat. Should either tyre deflate to below a predetermined pressure, the spring urges said element (28) against said seat to isolate the tyres one from the other. A warning device triggered by movement of the piston to close the valve warns the driver that he has an under inflated tyre. A semicylindrical groove (96) in the casing (10) and a bore (98) co-axial with the groove serve to receive a tyre inlet connection (104), there being a valve opening element (116) in the bore (98). <IMAGE> |
