Tire pressure sensor for motor vehicles
First Claim
1. A tire pressure sensor to be fastened to a rim of a vehicle wheel for sensing an inflation pressure of a tire mounted on the rim, said pressure tire sensor comprising reference pressure chamber means having a filled reference pressure volume and including a reference pressure chamber for monitoring the tire inflation pressure;
- an electrically conductive diaphragm sealingly separating said reference pressure chamber from a tire interior;
a sensor electric circuit is said sensor;
a contact pin located in said reference pressure chamber and removably contacting said electrically conductive diaphragm for closing said sensor electric circuit when the tire inflation pressure is at a predetermined value; and
means defining a deformable portion of the reference pressure chamber means and enclosing at least partially said reference chamber volume, and means other than the tire pressure for deforming said deformable portion to thereby change said reference chamber volume and establish a predetermined reference pressure in said reference pressure chamber.
1 Assignment
0 Petitions
Accused Products
Abstract
A tire pressure sensor to be fastened to a rim of a vehicle wheel for sensing an inflation pressure of a tire mounted on the rim, the tire pressure sensor comprising a reference pressure chamber having a gas filled reference pressure volume, an electrically conductive diaphragm for sealingly separating the reference pressure chamber at a tire interior, a sensor electric circuit, a contact pin located in the reference pressure chamber and cooperating with the electrically inductive diaphragm for closing the sensor electric circuit when the tire inflation pressure is at a predetermined value, and an additional pressure chamber communicating with the reference pressure chamber and deformable to change the reference pressure volume therein to thereby establish a predetermined reference pressure in the reference pressure chamber.
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Citations
12 Claims
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1. A tire pressure sensor to be fastened to a rim of a vehicle wheel for sensing an inflation pressure of a tire mounted on the rim, said pressure tire sensor comprising reference pressure chamber means having a filled reference pressure volume and including a reference pressure chamber for monitoring the tire inflation pressure;
- an electrically conductive diaphragm sealingly separating said reference pressure chamber from a tire interior;
a sensor electric circuit is said sensor;
a contact pin located in said reference pressure chamber and removably contacting said electrically conductive diaphragm for closing said sensor electric circuit when the tire inflation pressure is at a predetermined value; and
means defining a deformable portion of the reference pressure chamber means and enclosing at least partially said reference chamber volume, and means other than the tire pressure for deforming said deformable portion to thereby change said reference chamber volume and establish a predetermined reference pressure in said reference pressure chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- an electrically conductive diaphragm sealingly separating said reference pressure chamber from a tire interior;
Specification