US4416034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Front-suction arrangement on a vacuum cleaner
Assignee: Vorwerk and Co Interholding GmbH
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Filing: 1981-10-22
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Granted: 1983-11-22
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Expires: 2001-10-22
Abstract
Abstract An arrangement for front suction on a vacuum cleaner, which includes a lever or a spring on a front side of the vacuum cleaner. The lever or the spring lifts the vacuum cleaner from the floor in response to a counter pressure exerted on the lever or the spring by a limiting wall, when the vacuum cleaner abuts against that limiting wall.
Inventors
- 👤 Heinz-Jurgen Ahlf
- 👤 Wieland Guhne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:25
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
147 words
A device for front suction on a vacuum cleaner including a housing having a front side as viewed in a direction of traveling of the vacuum cleaner and a bottom plane, comprising lifting means mounted to said front side and operative for lifting said front side from a floor in response to a counter pressure exerted on said lifting means by a limiting surface when said lifting means is brought into contact with said limiting surface, said lifting means including a pivotable lever pivotable about a pivot point located on said front side of the housing at a predetermined distance from said bottom plane, said lever being longer than said predetermined distance and being spring-loaded in said direction of traveling and adapted to pivot in the direction of the floor under said counter pressure and thus lift said front side when the lever rests against the floor.
Claim 2
Independent Claim
147 words
A device for front suction on a vacuum cleaner including a housing having a front side as viewed in a direction of traveling of the vacuum cleaner and a bottom plane, comprising lifting means mounted to said front side and operative for lifting said front side from a floor in response to a counter pressure exerted on said lifting means by a limiting surface when said lifting means is brought into contact with said limiting surface, said lifting means including a pivotable lever pivotable about a pivot point located on said front side of the housing at a predetermined distance from said bottom plane, said lever being longer than said predetermined distance and being spring-loaded in said direction of traveling and adapted to pivot in the direction of the floor under said counter pressure and thus lift said front side when the lever rests against the floor.
Claim 3
Dependent Claim
22 words
The device as defined in claim 1, wherein said pivotable lever points back to its initial position upon ceasing said counter pressure.
Claim 4
Independent Claim
143 words
A device for front suction on a vacuum cleaner including a housing having a front side as viewed in a direction of traveling of the vacuum cleaner and a bottom plane, comprising lifting means mounted to said front side and operative for lifting said front side from a floor in response to a counter pressure exerted on said lifting means by a limiting surface when said lifting means is brought into contact with said limiting surface, said lifting means including at least one curved leaf spring having one end rigidly connected to the front side of the housing and another end, and a slide slidably mounted on the housing, said another end of said spring being rigidly connection to said slide, said spring in response to said counter pressure urging said slide to rest against the floor and thus lift said front side.
Claim 5
Independent Claim
143 words
A device for front suction on a vacuum cleaner including a housing having a front side as viewed in a direction of traveling of the vacuum cleaner and a bottom plane, comprising lifting means mounted to said front side and operative for lifting said front side from a floor in response to a counter pressure exerted on said lifting means by a limiting surface when said lifting means is brought into contact with said limiting surface, said lifting means including at least one curved leaf spring having one end rigidly connected to the front side of the housing and another end, and a slide slidably mounted on the housing, said another end of said spring being rigidly connection to said slide, said spring in response to said counter pressure urging said slide to rest against the floor and thus lift said front side.
Claim 6
Dependent Claim
25 words
The device as defined in claim 3, wherein said front side is formed with an elongated groove, said slide being slidably positioned in said groove.
Claim 7
Dependent Claim
18 words
The device as defined in claim 4, wherein a number of leaf springs and corresponding slides are provided.
Claim 8
Dependent Claim
20 words
The device as defined in claim 5, wherein said leaf springs are connected to each other by a connecting rod.
Claim 9
Dependent Claim
26 words
The device as defined in claim 3, wherein only one spring and a number of slides are provided, said slides being rigidly connected to each other.
References Cited (Backward Citations)
US2513587A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-21 | 1987-05-23 | 1987-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-21 | 1991-05-23 | 1991-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-21 | 1995-05-23 | 1995-11-22 | $7700.00 | Window Closed / Lapsed |