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US5585554A Expired / Lapsed US ⏱️ 0.0 years remaining

System and method for monitoring a pneumatic tire

Assignee: Individual
•
Filing: 1995-06-07
•
Granted: 1996-12-17
•
Expires: 2015-06-07
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Abstract

Abstract A pneumatic tire monitoring system is disclosed which provides a pressure sensor/transponder unit for each pneumatic tire of a vehicle to monitor tire pressure. A coded signal transmitted from each transponder unit is received by a multi-purpose receiver which may provide information to the vehicle operator or to other vehicle systems and subsystems. Each transponder unit is characterized by ultra low power consumption to extend the useful battery life. The transponder units may be mounted within the vehicle tires, or externally mounted. Impedance matching circuitry allows the use of the wheel rims with the transmitting antenna so as to avoid doppler shift induced by the rotating antenna and frequency drift induced by capacitive coupling.

Inventors

  • 👤 Michael Handfield
  • 👤 Helene Laliberte

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 07:23
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/2208; H01Q1/2241; B; B60; B60C; B60C23/00; B60C23/02; B60C23/04; B60C23/0408; B60C23/0422; B60C23/0433; B60C23/0447; B60C23/0455; B60C23/0462; B60C23/0491; B60C23/0494; B60C23/0496; G; G06; G06K; G06K19/00; G06K19/06; G06K19/067; G06K19/07; G06K19/077; G06K19/07749; G06K19/07758; G06K19/07764

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 105 words
A super-regenerative receiver with compensation, the receiver comprising: an antenna for receiving a transmitted electromagnetic signal; a two-stage common-base amplifier having an input and an output, the input being operatively associated with the antenna; a transistor having a base, an emitter, and a collector, the base being capacitively coupled to the output of the amplifier; a first inductor connected across the base and the collector of the transistor; a second inductor connected to the base of the transistor and capacitively coupled to the first inductor, the first and second inductors being inductively coupled out of phase so as to improve frequency stability of the system.
Claim 2
Dependent Claim 105 words
A super-regenerative receiver with compensation, the receiver comprising: an antenna for receiving a transmitted electromagnetic signal; a two-stage common-base amplifier having an input and an output, the input being operatively associated with the antenna; a transistor having a base, an emitter, and a collector, the base being capacitively coupled to the output of the amplifier; a first inductor connected across the base and the collector of the transistor; a second inductor connected to the base of the transistor and capacitively coupled to the first inductor, the first and second inductors being inductively coupled out of phase so as to improve frequency stability of the system.
Claim 3
Dependent Claim 24 words
The receiver of claim 1 wherein the receiver is tuned to detect pulses at a nominal frequency of about 300 MHz and 90 MHz.
Claim 4
Dependent Claim 87 words
The receiver of claim 1 wherein the two-stage common-base amplifier comprises: a first low-noise transistor having a base, an emitter, and a collector, the base being coupled to the antenna via a capacitor and a third inductor and the emitter being connected to ground; and a second low-noise transistor having a base, an emitter, and a collector, the base being capacitively coupled to the collector of the first low-noise transistor, the emitter being coupled to ground, and the collector being coupled to the output of the amplifier.
Claim 5
Dependent Claim 19 words
The receiver of claim 1 wherein the first and second inductors have a nominal value of about 20 mH.
Claim 6
Dependent Claim 12 words
The receiver of claim 1 wherein the transistor comprises a low-noise transistor.
Claim 7
Dependent Claim 40 words
The receiver of claim 1 further comprising: a third inductor connected to the emitter of the transistor; and a capacitor having a first end coupled to the base of the transistor and a second end coupled to the third inductor.
Claim 8
Dependent Claim 23 words
The receiver of claim 6 wherein the third inductor and the capacitor are selected to produce a quenching frequency of about 100 KHz.

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1999-12-17 2000-06-17 2000-12-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2003-12-17 2004-06-17 2004-12-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2007-12-17 2008-06-17 2008-12-17 $7700.00 Window Closed / Lapsed

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