Patent ID: 6557407
Filing Date: 2003-05-06
Classification: G01D,G01L

Abstract:
A tire pressure gauge comprising:a casing, comprising a first end hole, a second end hole, and a receiving chamber in communication between said first end hole and said second end hole; a light penetrable scale mounted in the receiving chamber of said casing and moved in and out of the first end hole of said casing, said light penetrable scale having a first end moved in and out of the first end hole of said casing, a second end, and an elongated scale body connected between said first end and said second end; a battery and lamp assembly fastened to the first end of said light penetrable scale outside said casing; a compression spring mounted in the receiving chamber of said casing and accommodating said light penetrable scale; a piston moved in the receiving chamber of said casing between the first end hole and second end hole and fastened to one end of said compression spring and stopped at the second end of said light penetrable scale; and an air nozzle fixedly fastened to the second end hole of said casing and adapted for being engaged with an air valve of a vehicle tire for guiding air pressure from a vehicle tire into said casing so as to move said piston and to force said light penetrable scale out of the first end hole of said casing.