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Dual tire equalizer having remote indicator

  • US 5,302,939 A
  • Filed: 09/08/1992
  • Issued: 04/12/1994
  • Est. Priority Date: 09/08/1992
  • Status: Expired due to Term
First Claim
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1. A tire pressure equalizer and remote pressure indicator system for dual tires mounted on a set of wheels on a vehicle body comprising:

  • (A) on the set of wheels;

    (1) a housing having a first chamber and a second chamber separated by a transverse sealed diaphragm, the first chamber having;

    (a) a valve seat opposite the diaphragm, with a central opening, the diaphragm being adapted to seat and close off the seat,(b) first passage means for connecting the seat opening and one tire.(c) second passage means for connecting the first chamber to the other tire, and(d) fill means communicating with the first chamber;

    (2) a rigid hollow tubular elongate probe disposed in the second chamber with one end thereof engaging the diaphragm opposite the seat, the probe being formed with an outward annular web having an annular trough directed away from the diaphragm,(3) spring means in the second chamber encircling the probe and compressively disposed between the trough and a housing part remote from the diaphragm and urging the probe and diaphragm toward seating disposition,(4) electric switch means having a first and second condition disposed adjacent the other end of the probe adapted to be changed from first to second condition thereby when the diaphragm moves from seated to unseated position,(5) a radio transmitter including a power supply in circuit with the switch;

    (B) on the vehicle body;

    (1) a radio receiver spaced from the transmitter and responsive thereto,(2) tire condition indicator means connected to the receiver;

    whereby as pressure drops from a selected pressure, the diaphragm and elongate probe driven by the spring, move to seat and the condition of the switch is changed to indicate to the indicator means a less-than-selected pressure, and the diaphragm in seating isolates the two tires.

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