Tire pressure monitoring system having a collapsible casing
First Claim
1. A tire pressure monitoring system for a wheel having a rim and a tire defining an internal cavity with a tire pressure present within the cavity, said system comprising:
- a support adapted for mounting to the rim within the internal cavity;
a casing supported by said support and having a first end and a second end spaced from said first end with said ends defining a length;
a first magnet disposed within said casing approximate said first end;
a second magnet disposed within said casing approximate said second end; and
a sensor mounted a distance from said casing for sensing a presence of each of said magnets;
said casing being sealed at a predetermined pressure and collapsible for varying said length of said casing in response to changes in the tire pressure within the internal cavity of the wheel to move said first magnet relative to said second magnet.
2 Assignments
0 Petitions
Accused Products
Abstract
A tire pressure monitoring device and system includes a support or housing mounted to a rim of a wheel of a vehicle. A casing is movably secured to the support and a pair of spaced magnets are disposed within the casing. The casing is collapsible for varying the length of the casing in response to changes in the tire pressure to move the magnets relative to each other. A sensor is mounted a distance from the casing for sensing a presence of each of the magnets. A controller is in communication with the sensor to determine the length of the casing and the relative movement between the magnets to calculate any changes in tire pressure.
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Citations
20 Claims
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1. A tire pressure monitoring system for a wheel having a rim and a tire defining an internal cavity with a tire pressure present within the cavity, said system comprising:
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a support adapted for mounting to the rim within the internal cavity; a casing supported by said support and having a first end and a second end spaced from said first end with said ends defining a length; a first magnet disposed within said casing approximate said first end; a second magnet disposed within said casing approximate said second end; and a sensor mounted a distance from said casing for sensing a presence of each of said magnets; said casing being sealed at a predetermined pressure and collapsible for varying said length of said casing in response to changes in the tire pressure within the internal cavity of the wheel to move said first magnet relative to said second magnet. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A tire pressure monitoring device for a wheel having a rim and a tire defining an internal cavity with a tire pressure present within the cavity, said device comprising:
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a housing adapted for mounting to the rim and in fluid communication with the internal cavity for exposing said housing to the tire pressure; a casing having a length and movably disposed relative to said housing; a first magnet secured to said casing at a first location; and a second magnet secured to said casing at a second location spaced from said first location; said casing being collapsible for varying said length of said casing in response to changes in the tire pressure to move said magnets relative to one another. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification