Vacuum cleaner with filling-condition indicator
First Claim
1. In a vacuum cleaner, a combination comprising a housing having a suction chamber and a bag-admitting opening;
- a filter bag supporting plate mounted in said housing inwardly of said bag-admitting opening and having two openings communicating with the interior of a supported filter bag in which pressure increases as the bag is filled with dust;
a cover on said housing movable between an open and a closed position in which it respectively exposes and closes said bag-admitting opening, said cover having a suction-nipple entering in one of said openings and a connecting nipple entering into another of said openings and communicating with said suction chamber when said cover moves into said closed position; and
bag-filling condition indicator means including a member in said connecting nipple operative in response to pressure differentials between said suction chamber and the interior of said bag.
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Accused Products
Abstract
A vacuum cleaner has a housing with an inlet which can be closed by a cover. A dust bag can be installed in the housing suspended from a plate which is located inwardly of the cover and has two openings both of which communicate with the interior of the bag. The cover carries a suction nipple which sealingly enters one of the openings when the cover is closed. A connecting nipple is also carried by the cover and sealingly enters the other opening when the cover is closed. The entire connecting nipple, or a diaphragm mounted in the same, moves in direction towards the cover when, in response to increasing filling of the bag and clogging of the filter pores thereof, the pressure in the bag rises to a level higher than the pressure at the other side of the connecting nipple or diaphragm, respectively. This movement is transmitted to an indicator observable from the exterior of the vacuum cleaner and provides an indication of the degree to which the bag is filled.
15 Citations
12 Claims
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1. In a vacuum cleaner, a combination comprising a housing having a suction chamber and a bag-admitting opening;
- a filter bag supporting plate mounted in said housing inwardly of said bag-admitting opening and having two openings communicating with the interior of a supported filter bag in which pressure increases as the bag is filled with dust;
a cover on said housing movable between an open and a closed position in which it respectively exposes and closes said bag-admitting opening, said cover having a suction-nipple entering in one of said openings and a connecting nipple entering into another of said openings and communicating with said suction chamber when said cover moves into said closed position; and
bag-filling condition indicator means including a member in said connecting nipple operative in response to pressure differentials between said suction chamber and the interior of said bag. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- a filter bag supporting plate mounted in said housing inwardly of said bag-admitting opening and having two openings communicating with the interior of a supported filter bag in which pressure increases as the bag is filled with dust;
Specification