Communications: electrical – Selective – Having indication or alarm
Patent
1980-01-15
1982-01-19
Waring, Alvin H.
Communications: electrical
Selective
Having indication or alarm
200 6122, 340539, B60C 2304
Patent
active
043119859
ABSTRACT:
Tire pressure monitors are incorporated in vehicles having penumatic tires (14) to continuously or periodically measure the air pressure within the tires and to alert the driver should the pressure in one of the tires fall below a predetermined value. A self-contained battery powered rf transmitter unit (10) is affixed within the drop center (22) of each wheel (12) and includes a pressure sensing switch (84). The battery is contained within a housing (20) mounted to the external surface of the wheel adjacent a fill valve (30) through which electrical wires (50) are routed to the transmitter (11). The transmitter emits a pulse every 33 seconds when the air pressure within the tire is above a prescribed value. A receiver (13), located in the passenger compartment of the vehicle, receives the signal(s) from the transmitters and counts the number of signals received over a given time period established by an internal pulse generator. If fewer than a predetermined number of pulses are received during any given time period, a fault condition is indicated and the driver is appropriately warned. The system also has self-check features wherein upon start-up of the associated vehicle, a warning light (320) and buzzer (322) are turned on until the first correct sequence of signals are received from the transmitters. A centrifugal switch interconnects each transmitter with its associated battery only during vehicle operation to prolong battery life.
REFERENCES:
patent: 2860321 (1958-11-01), Strickland et al.
patent: 3111644 (1963-11-01), Froelich et al.
patent: 3178686 (1965-04-01), Mills
patent: 3223969 (1965-12-01), Course
patent: 3296590 (1967-01-01), Dalton
patent: 3588815 (1971-06-01), Koonce
patent: 3796990 (1974-03-01), Hill
patent: 3803550 (1974-04-01), Mirsky
patent: 3950726 (1976-04-01), Fujikawa et al.
patent: 4059823 (1977-11-01), Martin et al.
Gee Thomas A.
Speranza Donald
Eaton Corporation
Lewis J. G.
McCloskey R. J.
Waring Alvin H.
LandOfFree
Tire pressure monitor and deenergization circuit therefore does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tire pressure monitor and deenergization circuit therefore, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tire pressure monitor and deenergization circuit therefore will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1917624