Level sensor for an air-spring shock absorber

Details Level sensor for an air-spring shock absorber Level sensor for an air-spring shock absorber

1977-12-12

1979-04-17

Tokar, M.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250231P, G01N 2130

Patent

active

041502990

ABSTRACT:
A level sensor for an air-spring shock absorber is sensitive to the axle-to-body distance of the vehicle on which the shock absorber is mounted. The level sensor comprises a thin support plate formed of resilient material that may be deformed to fit within the shock absorber in conformity with the shape of the inner surface of the tubular member defining the air spring. The support plate has an LED mounted on one end, and first and second photoresistors mounted at the other end in spaced relation to one another; the first and second photoresistors representing the upper and lower limits of permissible axle-to-body distance, respectively. Light communication between the LED and photoresistors is established or interrupted by the absence or interposition of a fluid reserve tube therebetween. A connector head is integrally formed with the support plate and is insertable through a hole in the tubular body defining the air chamber to secure the sensor in position.

REFERENCES:
patent: 3906240 (1975-09-01), Jeffree

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