TW200508058A - Tire pressure monitoring devices - Google Patents

Tire pressure monitoring devices

Info

Publication number
TW200508058A
TW200508058A TW092122880A TW92122880A TW200508058A TW 200508058 A TW200508058 A TW 200508058A TW 092122880 A TW092122880 A TW 092122880A TW 92122880 A TW92122880 A TW 92122880A TW 200508058 A TW200508058 A TW 200508058A
Authority
TW
Taiwan
Prior art keywords
pressure
counter
tire
monitoring device
pressure chamber
Prior art date
Application number
TW092122880A
Other languages
Chinese (zh)
Other versions
TWI238124B (en
Inventor
Torbjorn Lundqvist
Claes Grondahl
Original Assignee
Torbjorn Lundqvist
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Torbjorn Lundqvist filed Critical Torbjorn Lundqvist
Priority to TW92122880A priority Critical patent/TWI238124B/en
Publication of TW200508058A publication Critical patent/TW200508058A/en
Application granted granted Critical
Publication of TWI238124B publication Critical patent/TWI238124B/en

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  • Measuring Fluid Pressure (AREA)

Abstract

A low tire pressure monitoring device (20) that is provided within a tire valve wire stem (210) and methods of using the same. The monitoring device comprises a counter-pressure chamber (21), a flexible membrane (36), a contact member, counter-pressure chamber pin (230), a PC board (29), and a means for emitting a signal. The monitoring device is calibrated by trapping the tire's initial air pressure in the counter-pressure chamber. The monitoring device (20) monitors the pressure differential between the counter-pressure chamber (21) and the tire. When the pressure differential between the pressure in the counter-pressure chamber and the pressure within the tire exceeds a predetermined maximum pressure differential, the flexible membrane (36) is deflected so that an electrical circuit is completed and a warning signal is emitted.
TW92122880A 2003-08-20 2003-08-20 Tire pressure monitoring devices TWI238124B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW92122880A TWI238124B (en) 2003-08-20 2003-08-20 Tire pressure monitoring devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW92122880A TWI238124B (en) 2003-08-20 2003-08-20 Tire pressure monitoring devices

Publications (2)

Publication Number Publication Date
TW200508058A true TW200508058A (en) 2005-03-01
TWI238124B TWI238124B (en) 2005-08-21

Family

ID=37000201

Family Applications (1)

Application Number Title Priority Date Filing Date
TW92122880A TWI238124B (en) 2003-08-20 2003-08-20 Tire pressure monitoring devices

Country Status (1)

Country Link
TW (1) TWI238124B (en)

Also Published As

Publication number Publication date
TWI238124B (en) 2005-08-21

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees