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Tire pressure control system

  • US 4,562,874 A
  • Filed: 02/28/1984
  • Issued: 01/07/1986
  • Est. Priority Date: 03/19/1983
  • Status: Expired due to Fees
First Claim
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1. A tire pressure control system with a pressure switch assembly installed in a rim, which pressure switch, as part of a tuned circuit, damps, across an air gap, an HF transmitter, installed in a wheel web and having downstream analysis electronics, the pressure switch assembly comprising a support body having a diaphragm pressure cell with a reference pressure located in it and having a filling connection and the diaphragm of the pressure cell being subjected on one side to the reference pressure and on the other side to the tire pressure and being effectively connected to a contact switch which is part of the tuned circuit and is also located in the support body, further comprising a first valve means with an air inlet opening located in the support body of the pressure switch, which air inlet opening, when the tire is being filled, is in connection, via a first valve seat, with the tire volume and, via a second valve seat effectively in series with the first valve means, is also in connection, via the filling connection, with the reference volume of the diaphragm pressure cell.

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