Vacuum cleaner

Details Vacuum cleaner Vacuum cleaner

2005-02-01

2005-02-01

Hopkins, Robert A. (Department: 1724)

Gas separation: apparatus

With signals, indicators, measuring, or testing means

Position measuring means

C055S337000, C055S429000, C055SDIG003, C055SDIG003, C015S339000

Reexamination Certificate

active

06849108

ABSTRACT:
A vacuum cleaner includes a removable filter element and an indicator member having a first position when the filter member is removed from the cleaner and a second position when the filter member is in place in the cleaner and being readily visible to a user of the vacuum cleaner in at least one of the first and second positions. When the indicator member is in the first position, the vacuum cleaner cannot be used to collect dust and dirt.

REFERENCES:
patent: 2742105 (1956-04-01), Dow
patent: 3745965 (1973-07-01), Liung et al.
patent: 4044421 (1977-08-01), Kristenson et al.
patent: 5102435 (1992-04-01), Rau et al.
patent: 3434209 (1986-03-01), None
patent: 197 25 990 (1998-12-01), None
patent: 100 21 594 (2001-11-01), None
patent: 839494 (1998-05-01), None
patent: WO 9835602 (1998-08-01), None

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