×

Tire pressure indicator

  • US 5,856,619 A
  • Filed: 05/13/1997
  • Issued: 01/05/1999
  • Est. Priority Date: 05/13/1997
  • Status: Expired due to Fees
0
Associated Cases
0
Associated Defendants
0
Product Citations
0
Petitions
23
Forward Citation
0
Assignments
First Claim
Patent Images

1. A tire pressure indicator comprising:

  • a connecter shaped cylindrical, and having a center lengthwise space of an H-shaped cross-section, an outer portion having female threads to screw with male threads of an air valve of a tire, an air guide disc together with a seal gasket fitted in an intermediate portion and in said outer portion, said intermediate portion having a smaller diameter hole than those said outer portion and an inner portion have, said inner portion having male threads, an extensible bellows fixed in said inner portion, an inverted T-shaped disc located behind said bellows in said inner portion, said male threads screwing with female threads of a lampcover via a washer;

    said air guide disc having a center projecting-down post and two air holes at both sides of said post, said post able to press open the air valve of a tire inward to let air in the tire to flow out to pass through said two air holes into said connecter to extend said extensible bellows;

    said lamp cover receiving an LED lamp and an electric conducting unit therein, having female threads in a lower end to screw with said male threads of said connecter;

    said electric conducting unit including a negative pole tube, a positive copper conductor, an insulating spring base with a center hole, a fix disc with a center hole, an insulating ring, and a negative copper washer with a center hole;

    a battery deposited laterally in said insulating ring, said positive copper conductor, said insulating spring base, said fix disc and said insulating ring all having a hole near a spherical edge in the same location for fitting said negative pole tube therein in place, said negative pole tube containing a negative lead coming from said LED lamp and connected with said negative washer, said positive copper conductor connected with said positive of said LED with a positive lead, said center hole of said insulating spring base receiving a small diameter portion of a copper cylinder and a spring therein, said projecting small diameter portion protruding through the center hole of said fix disc and urging the positive of said battery, said spring urged in place by said positive copper disc; and

    ,said connecter screwed with and pressing an air valve of a tire for forcing air of the tire to flow out, said extensible bellows expanded inward to push said inverted T-shaped disc when the air pressure of the tire is strong enough, said inverted T-shaped disc then pressing said battery in said insulating ring, said battery pressed to move inward to be disconnected from said negative washer so that the negative of said battery is cut off and said LED lamp is then turned off, said bellows shrinking back in case the air pressure of the tire is not sufficient for running, said spring compressed so far recovering its elasticity to push said T-shaped cylinder back, which then pushes said battery back to contact with said negative washer so that said LED lamp is lit up to show that the air pressure in the tire is not sufficient for running.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×