Patent US4001912A successfully refreshed from Google Patents.
US4001912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner device
Assignee: Electrolux AB
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Filing: 1976-01-16
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Granted: 1977-01-11
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Expires: 1996-01-16
Abstract
Abstract A vacuum cleaner having a device for ensuring that the dust container is in place when it is desired to operate the cleaner. The device constitutes an arrangement on the dust container that functions to close the motor circuit thereby permitting the vacuum cleaner to be operative, however, if no dust container is present in the vacuum cleaner the motor circuit remains open and the vacuum cleaner can not be operated.
Inventors
- 👤 Bolik Anders Gottfrid Eriksson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:42
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/19; Y; Y10; Y10S; Y10S55/00; Y10S55/02; Y10S55/03; Y10S55/34
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
95 words
In a motor-driven vacuum cleaner having a dust container with an air pervious portion connected to a relatively rigid attachment plate, said plate having an inlet for dust-laden air, a current supply circuit for said motor that is normally open when no dust container is present in said vacuum cleaner, the improvement comprising: a surface of said attachment plate being positioned to close the current supply circuit and render said motor operative when said dust container is inserted in the proper place in said vacuum cleaner, and said vacuum cleaner is in its operating configuration.
Claim 2
Dependent Claim
95 words
In a motor-driven vacuum cleaner having a dust container with an air pervious portion connected to a relatively rigid attachment plate, said plate having an inlet for dust-laden air, a current supply circuit for said motor that is normally open when no dust container is present in said vacuum cleaner, the improvement comprising: a surface of said attachment plate being positioned to close the current supply circuit and render said motor operative when said dust container is inserted in the proper place in said vacuum cleaner, and said vacuum cleaner is in its operating configuration.
Claim 3
Dependent Claim
28 words
The combination as claimed in claim 1 wherein at least a part of said attachment plate is formed as an actuating device to close said current supply circuit.
Claim 4
Dependent Claim
57 words
The combination as claimed in claim 1 further comprising switch contacts which are acted upon by said surface of the attachment plate, said switch contacts being normally open and urged into a closed position when said dust container is inserted in the proper place in said vacuum cleaner and said vacuum cleaner is in its operating configuration.
Claim 5
Dependent Claim
87 words
The combination as claimed in claim 3 wherein said vacuum cleaner includes a housing for said dust container, a movable cover part for said housing, an air channel in said housing communicating said dust container to said motor, and said switch contacts being mounted in said cover whereby when said cover is in a closed position on said housing said surface of the attachment plate engages at least one of said switches to move said switch into engagement with the other switch and thereby close said circuit.
Claim 6
Dependent Claim
20 words
The combination as claimed in claim 4 wherein said cover is pivotally hinged to an upper part of said housing.
Claim 7
Dependent Claim
55 words
The combination as claimed in claim 4 wherein the lower switch is movable and the upper switch is fixed, and a projecting part of said attachment plate is so constructed and arranged as to urge the lower switch against said upper switch when said dust container is in the proper place in the vacuum cleaner.
Claim 8
Dependent Claim
54 words
The combination as claimed in claim 6 wherein said cover is provided with a base portion that has a slot through which the projecting part of said attachment plate protrudes when the cover is in the closed position to engage said lower switch and move the same into engagement with said fixed upper switch.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-11 | 1980-07-12 | 1981-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-11 | 1984-07-12 | 1985-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-11 | 1988-07-12 | 1989-01-11 | $7700.00 | Window Closed / Lapsed |