Pressure gauge for a pneumatic tire

Details Pressure gauge for a pneumatic tire Pressure gauge for a pneumatic tire

1999-04-26

2000-09-26

Swarthout, Brent A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

731465, 116 34R, 340447, B60C 2300

Patent

active

061247855

ABSTRACT:
A pressure gauge has a pressure-sensing unit including an inner casing that contains a pressure-responsive contact unit, a conductive high-pressure contact unit and a conductive low-pressure contact unit. The pressure-responsive contact unit includes an air impervious and length variable tubular member, and a conductive contact member on one end of the tubular member. In the event of an over-inflated condition, the pressure-responsive contact unit moves in the inner casing to establish physical contact with the high-pressure contact unit, thereby controlling a signal-transmitting unit to transmit a first pressure signal. In the event of an under-inflated condition, the pressure-responsive contact unit moves in the inner casing to establish physical contact with the low-pressure contact unit, thereby controlling the signal-transmitting unit to transmit a second pressure signal.

REFERENCES:
patent: 4048614 (1977-09-01), Shumway
patent: 5130694 (1992-07-01), Zaihaleian
patent: 5289161 (1994-02-01), Huang
patent: 5355924 (1994-10-01), Olney
patent: 5694111 (1997-12-01), Huang
patent: 5798689 (1998-08-01), Huang
patent: 6058768 (2000-05-01), Huang

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