Tire pressure indicator
First Claim
1. A tire pressure indicator having a hollow cylindrical body formed with a closed side at one end thereof and an open side at another end thereof for being positioned on a tire valve of an associated tire with a light bulb being detachably mounted in a threaded central opening formed in the closed side of the hollow cylindrical body, comprising:
- a transparent light cover screw-connected to the closed side of the hollow cylindrical body over the light bulb thereof;
a first conductor member having a central opening formed therein disposed on a bottom surface of the closed side of the hollow cylindrical body and engaged with a threaded negative portion of the light bulb through the central opening of said first conductor;
a piston container with an upper closed side thereof and an lower open side thereof screw-connected to the threaded negative portion of the light bulb at said upper closed side in the hollow cylindrical body;
a sleeve member with a closed side located at a lower end thereof movably disposed in the hollow cylindrical body with said piston container being sleevingly received therein;
a piston means movably disposed in an inner chamber of said piston container so as to be controlled by the tire pressure of an associated tire for turning the light bulb on and off in conjunction with the tire pressure condition of the associated tire;
a pressure sensing means fixedly provided on the closed side of said sleeve member under said piston means for being detachably connected to the tire valve of the associated tire to monitor and indicate the pressure condition of the associated tire; and
a supporting base, having an air chamber formed therein with internal and external threads provided therearound, screw-connected to the open side of the hollow cylindrical body for being detachably connected to the tire valve of the associated tire;
whereby, with said tire pressure indicator being detachably connected to an associated tire, the pressure condition of the associated tire can be monitored and indicated via the light bulb without incurring any air pressure leakage therefrom even when the hollow cylindrical body is damaged or loosened.
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Accused Products
Abstract
A tire pressure indicator includes: a hollow cylindrical body with a closed side and an open side; a light bulb with a threaded negative portion and a positive contact detachably mounted at the closed side of the hollow cylindrical body; a transparent cover positioned at the closed side over the light bulb; a first conductor, together with a piston container, connected to the threaded negative portion of the light bulb; a sleeve member movably disposed around the piston container in the hollow cylindrical body; a piston unit composed of a mercury cell, a pressure spring and a sliding member movably disposed in the piston container; a pressure sensor which is a combination of a flexible film member, a second conductor and an air-channel member fixed on the closed side of the sleeve member under the piston unit; and a supporting base with an air chamber screw-connected to the open side of the hollow cylindrical body; whereby, when the air pressure indicator is connected to the tire valve of an associated tire, the tire pressure condition of the associated tire can be monitored and indicated via the light bulb without incurring any air pressure leakage of the associated tire.
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Citations
4 Claims
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1. A tire pressure indicator having a hollow cylindrical body formed with a closed side at one end thereof and an open side at another end thereof for being positioned on a tire valve of an associated tire with a light bulb being detachably mounted in a threaded central opening formed in the closed side of the hollow cylindrical body, comprising:
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a transparent light cover screw-connected to the closed side of the hollow cylindrical body over the light bulb thereof; a first conductor member having a central opening formed therein disposed on a bottom surface of the closed side of the hollow cylindrical body and engaged with a threaded negative portion of the light bulb through the central opening of said first conductor; a piston container with an upper closed side thereof and an lower open side thereof screw-connected to the threaded negative portion of the light bulb at said upper closed side in the hollow cylindrical body; a sleeve member with a closed side located at a lower end thereof movably disposed in the hollow cylindrical body with said piston container being sleevingly received therein; a piston means movably disposed in an inner chamber of said piston container so as to be controlled by the tire pressure of an associated tire for turning the light bulb on and off in conjunction with the tire pressure condition of the associated tire; a pressure sensing means fixedly provided on the closed side of said sleeve member under said piston means for being detachably connected to the tire valve of the associated tire to monitor and indicate the pressure condition of the associated tire; and a supporting base, having an air chamber formed therein with internal and external threads provided therearound, screw-connected to the open side of the hollow cylindrical body for being detachably connected to the tire valve of the associated tire;
whereby, with said tire pressure indicator being detachably connected to an associated tire, the pressure condition of the associated tire can be monitored and indicated via the light bulb without incurring any air pressure leakage therefrom even when the hollow cylindrical body is damaged or loosened. - View Dependent Claims (2, 3, 4)
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Specification