Equipment for measuring the inflation pressure of a tire of a vehicle wheel

摘要

Measurement equipment for measuring the inflation pressure of a tire of a vehicle wheel 1. The equipment comprises a body 16 defining an internal volume, a communication orifice 19 for putting the inside volume of the body 16 into communication with an inflation chamber situated between a rim 2 and a tire of the wheel and containing an inflation gas and an indicator member 25 slidably mounted in the body 16 so as to define a gastight separation between a first chamber 26 containing a given quantity of a reference gas and a second chamber 27 into which the communication orifice 19 leads. As a result, the indicator member 25 is subjected to opposing pressures that exist in each of the chambers. A position-identification device 30 is operative to identify the position of the indicator member in the body.

主权项

1. Measurement equipment for measuring the inflation pressure of a tire of a vehicle wheel (1), the equipment comprising:
a body (16) defining an internal volume; a communication orifice (19) for putting the inside volume of the body (16) into communication with an inflation chamber (6) situated between a rim (2) and a tire (4) of the wheel and containing an inflation gas; an indicator member (25; 125; 325) slidably mounted in the body (16) so as to define a gastight separation between a first chamber (26) containing a given quantity of a reference gas and a second chamber (27) into which the communication orifice (19) leads, such that the indicator member (25; 125; 325) is subjected to opposing pressures that exist in each of the chambers; and position-identification means (30; 143; 243, 244; 345; 451) for identifying the position of the indicator member in the body, the position-identification means including a sensor (30) for sensing the position of the indicator member.