Fill indicator for a vacuum cleaner dust collector

Details Fill indicator for a vacuum cleaner dust collector Fill indicator for a vacuum cleaner dust collector

1976-08-18

1977-11-29

Yasich, Daniel M.

Signals and indicators

Alarms

Fluid flow

55274, 73396, 116114PV, 116DIG25, G01P 1308, G01L 716

Patent

active

040600505

ABSTRACT:
An indicator device mounted on a vacuum cleaner housing which is under the influence of the pressure differnce between the inlet and outlet of a dust or dirt collector unit of the vacuum cleaner. The outer surface of the indicator device has markings that are continuously visible, and which show the amount of accumulated dust and dirt filling in the dust collector, at any given time.

REFERENCES:
patent: 2174443 (1939-09-01), Lofgren
patent: 2325188 (1943-07-01), Lofgren
patent: 2365962 (1944-12-01), Kahn
patent: 3119369 (1964-01-01), Harland et al.
patent: 3639998 (1972-02-01), Masson

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