Patent ID: 7458256

Claim:
A tire pressure monitoring device comprising: a housing unit including a tubular body that confines an air chamber and that has first and second portions, a tire coupling seat that is adapted to couple said first portion of said tubular body to a tire such that said air chamber is in fluid communication with an interior of the tire, and a cap body that is disposed at said second portion of said tubular body, said cap body being formed with an outwardly extending annular flange, said second portion of said tubular body being formed with a retainer part that engages said annular flange to prevent removal of said cap body from said tubular body; a tire inflating unit including an inflating tube connected at one end to said tubular body and in fluid communication with said air chamber, and an inflating valve disposed in said inflating tube; and a tire pressure monitoring unit disposed in said second portion of said tubular body and covered by said cap body.