Blockage indicator for internal combustion engine air cleaner el

Signals and indicators – Alarms – Fluid flow

Patent

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Details

116 70, 116114PV, G01L 1912

Patent

active

040290417

ABSTRACT:
The blockage indicator for an internal combustion engine air cleaner element has a cylindrical housing with ports provided in the cylindrical wall thereof. The housing accommodates an indicator drum which is carried on a stationary shaft mounted on the housing end wall. The cylindrical surface of the indicator drum has painted signalling areas. The indicator drum is fixed axially on the shaft and accommodates a spring adapted to turn the drum on the shaft.
The indicator housing also accommodates a spring-loaded diaphragm which forms, in conjunction with the housing, a sealed-off chamber communicating with the cleaned-air chamber of the air cleaner involved. A locking device provides interaction between the diaphragm and the indicator drum whose bottom wall faces toward the diaphragm. This constructional arrangement reduces the overall dimensions of the indicator.

REFERENCES:
patent: 3066527 (1962-12-01), Stein
patent: 3247824 (1966-04-01), Rodgers
patent: 3258960 (1966-07-01), Baden
patent: 3556043 (1971-01-01), Vayda
patent: 3721789 (1973-03-01), Black

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