Tire pressure monitoring device capable of being folded
First Claim
Patent Images
1. A tire pressure monitoring device for use with a pneumatic wheel assembly mounted to a vehicle, the wheel assembly including a wheel supporting a tire, the tire having an interior filled with air and the air having a pressure, said tire pressure monitoring device comprising:
- an attachment portion having a hollow passage therein, said attachment portion being securable to an existing valve stem such that said hollow passage communicates with the interior of the tire; and
a gauge portion having a central tube with a hollow interior, said gauge portion having a first and a second end, said first end being hingedly attached to said attachment portion such that said hollow interior communicates with said hollow passage, said central tube having a bleeder valve at said second end and said central tube supporting a pressure gauge, whereby said tire pressure monitoring device can be folded so as to reduce a distance to which said tire pressure monitoring device projects from the wheel.
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Abstract
A tire pressure monitoring device includes a pressure gauge pivotably mounted to a base which can be attached to a tire valve stem. The pressure gauge includes a ring-shaped piston and spring mounted in a transparent sleeve. Other embodiments use an electronic pressure sensor to generate a digital pressure display. Optionally the device may include a transmitter to provide pressure data to a display in the interior of a motor vehicle.
42 Citations
8 Claims
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1. A tire pressure monitoring device for use with a pneumatic wheel assembly mounted to a vehicle, the wheel assembly including a wheel supporting a tire, the tire having an interior filled with air and the air having a pressure, said tire pressure monitoring device comprising:
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an attachment portion having a hollow passage therein, said attachment portion being securable to an existing valve stem such that said hollow passage communicates with the interior of the tire; and a gauge portion having a central tube with a hollow interior, said gauge portion having a first and a second end, said first end being hingedly attached to said attachment portion such that said hollow interior communicates with said hollow passage, said central tube having a bleeder valve at said second end and said central tube supporting a pressure gauge, whereby said tire pressure monitoring device can be folded so as to reduce a distance to which said tire pressure monitoring device projects from the wheel. - View Dependent Claims (2, 3)
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4. A tire pressure monitoring device for use with a pneumatic wheel assembly mounted to a vehicle, the wheel assembly including a wheel supporting a tire, the tire having an interior filled with air and the air having a pressure, said tire pressure monitoring device comprising:
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an attachment portion having a hollow passage therein, said attachment portion being securable to an existing valve stem such that said hollow passage communicates with the interior of the tire; a filling portion having a hollow interior, said filling portion having a first and a second end, said first end being hingedly attached to said attachment portion such that said hollow interior communicates with said hollow passage, said filling portion having a bleeder valve at said second end, whereby said tire pressure monitoring device can be folded so as to reduce a distance to which said tire pressure monitoring device projects from the wheel; and electronic pressure sensing means mounted to said tire pressure monitoring device, said electronic pressure sensing means including a digital display for displaying sensed pressure. - View Dependent Claims (5, 6)
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7. A tire pressure monitoring device for use with a pneumatic wheel assembly mounted to a vehicle, the wheel assembly including a wheel supporting a tire, the wheel assembly having an interior filled with air and the air having a pressure, said tire pressure monitoring device comprising:
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a hollow housing having a wall with an exterior and an interior; a pressure sensor formed on said interior of said wall; circuit means for converting output from said pressure sensor to electronic pressure data, said circuit means housed within said housing; and power supply means for converting motion of the wheel assembly to electrical energy, said power supply means being housed in said housing and communicating with said circuit means. - View Dependent Claims (8)
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Specification