| 摘要 |
a. Safety valve. b. Safety valve characterised in that it consists of an outer casing 1, particularly a tubular one which is at least partially transparent and closed at that one of its ends 2 which is opposite the end 3 carrying the screw thread 4, by an opening means capable of placing the internal part of the casing 1 in contact with the pressure prevailing in the air chamber or the tyre, as well as of an indicator means equipped with a movable indicator member capable of moving inside the casing 1, the position of the indicator member in the casing 1 being a function of the pressure prevailing in the air chamber or the tyre. c. The invention applies to safety valves. <IMAGE>
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