Pneumatic pressure monitoring system
First Claim
1. A tire pressure monitoring system for a pneumatic tire, said tire being mounted on the rotating part of a wheel assembly of a vehicle or testing assembly wherein the rotating tire is to have its pneumatic pressure continuously monitored by pressure monitoring means mounted on said tire, wherein pressure changes from normal to abnormal and abnormal to normal produce detectable changes in condition of said pressure monitoring means and wherein it is desired to transmit said changes from said pressure monitoring means to the relatively stationary part of said vehicle or said testing assembly, comprising the following interconnected electrical and mechanical components:
- electrical conduction means for transmitting said change in condition of said pressure monitoring means;
said electrical conduction means being mounted on said rotating part of the wheel assembly and connected to said pressure monitoring means;
magnetic coupling means using only the law of electromagnetics known as Lenz'"'"'s Law for magnetically transmitting one of said changes in condition of said pressure monitoring means for said rotating part of the wheel assembly to the stationary part of said vehicle or testing assembly;
said magnetic coupling means being composed of two parts magnetically coupled to each other at each revolution of said rotating portion of said wheel assembly with the first of said parts mounted on said rotating portion of said wheel assembly and electrically connected to said electrical conduction means and with the second of said parts mounted to said stationary part of said vehicle or said testing assembly;
emf conduction means for transmitting said change in condition of said pressure monitoring means from said magnetic coupling means;
said emf conduction means being mounted on said stationary part of said vehicle or said testing assembly and electrically connected to said second part of said magnetic coupling means; and
circuit sensing and indication means for sensing said change in condition of said pressure monitoring means from the normal to the abnormal condition transmitted by said second part of said magnetic coupling means and indicating said change to the operator of said vehicle or said testing assembly;
said circuit sensing and indication means being mounted on said stationary part of said vehicle or said testing assembly and electrically connected to said emf conduction means.
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Accused Products
Abstract
An improved tire pressure monitoring system and method for detecting, for example, high pressure or low pressure of automobile tires utilizing uniquely designed magnetic coupling means for transmitting the tire high or low pressure from the rotating tire to the relatively stationary, non-rotating portion of the vehicle for indication of the state of the pressure on the operating panel of the vehicle. The novel tire pressure monitoring system is usually located on the wheel and brake drum assembly for all types of vehicles, monitoring the pressure for the appropriate vehicle tire (FIG. 1). The system includes a means for monitoring the pressure in the pneumatic tire, usually coupled directly to the tire stem. The system also includes an electrical conductor from the pneumatic pressure monitor means to ferrous core means, the composition of whose core is a material that has a relative normal permeability that is high, which is mounted on the rotating wheel hub and for which the electrical conduction means is wound around the ferrous core means forming a coil for the ferrous core means. The system also includes permanent magnet means mounted on the non-rotation axle of the wheel which magnetically couples to said ferrous core means to transmit any changes of said pressure monitoring means from the rotating tire to the relatively stationary (non-rotating) portion of the vehicle and transmits this information to alarm circuit means. The switch assembly means includes pick off coil means wrapped around the permanent magnet means to transmit signals from the pressure monitor means to the alarm circuit means by detecting changes in permeability of the ferrous core means, based on the principle of Lenz'"'"'s Law.
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Citations
16 Claims
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1. A tire pressure monitoring system for a pneumatic tire, said tire being mounted on the rotating part of a wheel assembly of a vehicle or testing assembly wherein the rotating tire is to have its pneumatic pressure continuously monitored by pressure monitoring means mounted on said tire, wherein pressure changes from normal to abnormal and abnormal to normal produce detectable changes in condition of said pressure monitoring means and wherein it is desired to transmit said changes from said pressure monitoring means to the relatively stationary part of said vehicle or said testing assembly, comprising the following interconnected electrical and mechanical components:
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electrical conduction means for transmitting said change in condition of said pressure monitoring means;
said electrical conduction means being mounted on said rotating part of the wheel assembly and connected to said pressure monitoring means;magnetic coupling means using only the law of electromagnetics known as Lenz'"'"'s Law for magnetically transmitting one of said changes in condition of said pressure monitoring means for said rotating part of the wheel assembly to the stationary part of said vehicle or testing assembly;
said magnetic coupling means being composed of two parts magnetically coupled to each other at each revolution of said rotating portion of said wheel assembly with the first of said parts mounted on said rotating portion of said wheel assembly and electrically connected to said electrical conduction means and with the second of said parts mounted to said stationary part of said vehicle or said testing assembly;emf conduction means for transmitting said change in condition of said pressure monitoring means from said magnetic coupling means;
said emf conduction means being mounted on said stationary part of said vehicle or said testing assembly and electrically connected to said second part of said magnetic coupling means; andcircuit sensing and indication means for sensing said change in condition of said pressure monitoring means from the normal to the abnormal condition transmitted by said second part of said magnetic coupling means and indicating said change to the operator of said vehicle or said testing assembly;
said circuit sensing and indication means being mounted on said stationary part of said vehicle or said testing assembly and electrically connected to said emf conduction means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A system for signaling conditions between moveable and relatively stationary members, wherein changes in state of conditions to be measured produce detectable changes in condition in monitoring means mounted on either said moveable or said relatively stationary member and mounted on the member where said conditions are to be measured, comprising the following interconnected electrical and mechanical components:
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electrical conduction means for transmitting said change in condition of said monitoring means;
said electrical conduction means being mounted on either said moveable or said relatively stationary member and mounted on the member where said conditions are to be measured and connected to said monitoring means;magnetic coupling means using only the law of electromagnetics known as Lenz'"'"'s Law for magnetically transmitting one of said changes in condition of said monitoring means from said moveable member to said stationary member if said conditions are to be measured on said moveable member, or from said stationary member to said moveable member if said conditions are to be measured on said stationary member;
said magnetic coupling means being composed of two parts magnetically coupled to each other at least once during the movement of said members with the first of said parts mounted on the member where said conditions are to be measured and electrically connected to said electrical conduction means and with the second of said parts mounted on the member that the first of said parts is not mounted on;emf conduction means for transmitting said change of condition of said monitoring means;
said emf conduction means being mounted on the same member as said second part of said magnetic coupling means and electrically connected to said second part of said magnetic coupling means; andcircuit sensing means for sensing said change in condition of said monitoring means transmitted by said second part of said magnetic coupling means and producing a control signal for use by other devices;
said circuit sensing means being mounted on the same member as said emf conduction means and electrically connected to said emf conduction means. - View Dependent Claims (16)
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Specification