Air filter restriction indicating device

Details Air filter restriction indicating device Air filter restriction indicating device

1974-11-07

1976-02-17

Nozick, Bernard

Communications: electrical

Systems

Call station

55274, 73 38, 116DIG25, 210 90, G08B 2100

Patent

active

039394573

ABSTRACT:
An air filter restriction detection device communicating with the air stream passing from an air filter to the air intake of an internal combustion engine sensing a decrease in the supply of air being drawn through said air filter by said engine and the same being indicated by the linear movement of an indicating member in said device, said device indicating also when said air filter requires cleaning or replacement for lack of a sufficient supply of air being drawn therethrough.

REFERENCES:
patent: 2296667 (1942-09-01), Hemphill
patent: 3066527 (1962-12-01), Stein
patent: 3388682 (1968-06-01), Whiting
patent: 3443365 (1969-05-01), Lee et al.
patent: 3492968 (1970-02-01), Workman, Jr.
patent: 3704458 (1972-11-01), Buchanan et al.

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