Patent ID: 8564429

Claim:
A tire pressure equalizer and tire pressure monitor for dual tires comprising: (A) a housing adapted to be mounted on a dual tire wheel assembly, having: (1) a first chamber and a second chamber separated by a sealed diaphragm, having: (a) the first chamber having a seat opposite the diaphragm, with a central opening, the diaphragm being adapted to seat and close off the seat, (b) first passageway means for communicating the first chamber to one tire, (c) second passageway means for communicating the first chamber seat opening and the other tire, and (d) fill means communicating with the first chamber; (2) a removable rigid cap with a lock ring affixed on the housing for forming the second chamber, (3) an inverted cup disposed in the second chamber with the base engaging the diaphragm opposite the seat; (4) spring means in the second chamber compressively disposed in between said cap interior end and the cup bottom wall and urging the cup and diaphragm toward seating disposition, whereby permitting said cup and diaphragm driven by said spring moving to seat and isolate the two tires as pressure dropped below a selected pressure, and moving to unseat and open up air communication between the tires when pressure rose above the selected pressure; (5) a tire pressure monitor section having: (a) first hole means with passage communicating to the first passageway, (b) second hole means with passage communicating to the second passageway, (c) electronic assembly means having a combination of a control unit, two pressure sensors, radio frequency signal transmitter, antenna, and power supply mounted on a print circuit board, and (d) mounting means securing said electronic assembly into tire pressure monitor section with said pressure sensors pressed against respective said hole to form an airtight mating, such that each pressure sensor through said hole adapted to expose directly to air pressure in the respective passageway and associated tire; (B) remote radio signal reception means for receiving and displaying tire pressure data and alerts transmitted by said tire pressure monitor.