Tire-mounted air pressure gauge assembly

In combination with a tire pressure gauge and a wheel having an inflatable tire mounted thereon, the tire having a valve stem with a conventionally depressible valve core therein, the valve stem extending longitudinally from a first side of said tire in direction generally parallel to the tire's rotational axis, toward a second opposite side of said tire and through an aperture in the wheel, the improvement which comprises:

• the gauge being a dial-type gauge having a dial face with a light-reflective background which covers substantially the entire dial face and has contrasting pressure indicia thereon and a pressure responsive indicator needle pivotally mounted with respect to the dial face;
• and
• an air pressure conduit threadably and sealably mounted at a first end thereof onto the valve stem and sealably connected at a second end thereof to the tire pressure gauge, the first end of the conduit having means for continuously depressing the valve core of the valve stem to allow air pressure from the tire to bleed through the conduit to the tire pressure gauge, and the conduit formed and aligned to readably present the dial face of the tire pressure gauge through said aperture in the wheel to an operator positioned on the first side of the tire.

For use with a tire-mounted air pressure gauge which has a spring chamber, a coiled spring responsive to tire air pressure mounted within the spring chamber and a pressure indicator needle mounted on the outer end of the coiled spring to extend radially outwardly therefrom, the improvement which comprises:

• arc-shaped wall means mounted within the spring chamber, the wall means being aligned between the coiled spring and an inner wall surface of the spring chamber for engaging an arcuate portion of the coiled spring to prevent radial expansion of the coiled spring beyond a predetermined radius and thus prevent the pressure indicator needle from contacting the inner wall surface of the spring chamber.

For use with a tire-mounted air pressure gauge which has a coiled spring responsive to tire air pressure, a dial face and a transparent cover portion thereover, the improvement which comprises:

• arc-shaped wall means formed integrally with the cover portion, with the arc-shaped wall means radially spaced from a most outward section of the coiled spring of the gauge for engaging an arcuate portion of the coiled spring to prevent radial expansion of the coiled spring beyond a predetermined radius.

For use with a tire-mounted air pressure gauge which has a coiled spring with a pressure indicator needle mounted thereon, wherein the coiled spring is responsive to tire air pressure, the improvement which comprises:

• arc-shaped wall means, having first and second ends, radially spaced from a most outward section of the coiled spring of the gauge for engaging an arcuate portion of the coiled spring to prevent radial expansion of the coiled spring beyond a predetermined radius;
• and
• a radially extending wing portion secured to each end of the wall means to extend outwardly therefrom in position to engage the pressure indicator needle.

For use with a tire-mounted air pressure gauge of the type having a coiled spring responsive to tire air pressure and an indicator needle secured to a radially outward end of the coiled spring, the improvement comprising:

• retainer means for preventing expansion of the coiled spring beyond a predetermined radius, the retainer means including an arc-shaped wall radially spaced from a most outward section of the coiled spring of the gauge for limiting radial expansion of the coiled spring, and first and second wing portions integrally formed with the annular wall and extending generally radially outward from the wall for engaging the indicator needle.

For use with a tire-mounted air pressure gauge of the type having a spring chamber and a coiled spring responsive to tire air pressure mounted within the spring chamber, the improvement comprising:

• cylindrical retainer wall means coaxially positioned with respect to the coiled spring and aligned between the coiled spring on an inner wall surface of the spring chamber for engaging the coiled spring when a predetermined radial expansion limit thereof has been reached, thereby preventing unlimited radial expansion and operative distortion of the coiled spring.

For use with a tire-mounted air pressure gauge which as a coiled spring with a pressure indicator needle mounted thereon, wherein the coiled spring is responsive to tire air pressure, the improvement which comprises:

• arc-shaped wall means, having first and second ends, radially spaced from a most outward section of the coiled spring of the gauge for engaging an arcuate portion of the coiled spring to prevent radial expansion of the coiled spring beyond a predetermined radius;
• and
• a radially extending wing portion secured to one end of the wall means to extend outwardly therefrom in position to engage the pressure indicator needle.