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US4499628A Expired / Lapsed US ⏱️ 0.0 years remaining

Vacuum cleaning apparatus

Assignee: Matsushita Floor Care Co
•
Filing: 1983-06-09
•
Granted: 1985-02-19
•
Expires: 2003-06-09
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Abstract

Abstract A vacuum cleaner structure arranged to provide front edge cleaning fully to the intersection of a floor surface and an upright wall surface by a forward movement of the vacuum cleaner nozzle thereto. The vacuum cleaner structure includes a front wall of the nozzle having openings and associated structure for selectively closing the openings when the nozzle is spaced remotely from the upright wall surface and automatically causing the openings to be opened when the nozzle front wall is closely juxtaposed to the upright wall surface. The closure member, in the illustrated embodiment is pivotally mounted to the front wall and movement thereof is effected by an actuator sensor button slidably mounted in the front wall to overcome the gravity biasing and suction biasing of the closure member to the closed position, as an incident of the front wall of the nozzle being juxtaposed to the upright wall surface.

Inventors

  • 👤 Clark I. Platt

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 16:39
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/02

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 117 words
In a vacuum cleaner having a nozzle defining a front wall, means defining a downwardly opening suction chamber rearwardly of the front wall, and means for applying suction to said chamber for picking up dirt from subjacent said chamber, the improvement comprising: means for providing an opening to said chamber through said front wall; closure means moveably mounted to said front wall to move forwardly thereof for selectively closing said opening; and means for sensing the proximity of said front wall to an upright wall surface and for causing said closure means to move forwardly of said front wall to discontinue closing said opening when said nozzle front wall is closely juxtaposed to said upright wall surface.
Claim 2
Dependent Claim 117 words
In a vacuum cleaner having a nozzle defining a front wall, means defining a downwardly opening suction chamber rearwardly of the front wall, and means for applying suction to said chamber for picking up dirt from subjacent said chamber, the improvement comprising: means for providing an opening to said chamber through said front wall; closure means moveably mounted to said front wall to move forwardly thereof for selectively closing said opening; and means for sensing the proximity of said front wall to an upright wall surface and for causing said closure means to move forwardly of said front wall to discontinue closing said opening when said nozzle front wall is closely juxtaposed to said upright wall surface.
Claim 3
Dependent Claim 22 words
The vacuum cleaner structure of claim 1 wherein said opening is disposed adjacent the level of the bottom of said suction chamber.
Claim 4
Dependent Claim 20 words
The vacuum cleaner structure of claim 1 wherein said closure member is biased to the position thereof closing said opening.
Claim 5
Dependent Claim 20 words
The vacuum cleaner structure of claim 1 wherein said closure member is gravity-biased to the position thereof closing said opening.
Claim 6
Dependent Claim 23 words
The vacuum cleaner structure of claim 1 including means for directing air flow upwardly from forwardly subjacent said front wall through said opening.
Claim 7
Dependent Claim 28 words
The vacuum cleaner structure of claim 1 wherein said closure means further defines means for directing air flow upwardly from forwardly subjacent said front wall through said opening.
Claim 8
Dependent Claim 18 words
The vacuum cleaner structure of claim 1 wherein said closure means is pivotally mounted to said front wall.
Claim 9
Dependent Claim 37 words
The vacuum cleaner structure of claim 1 wherein said closure means is pivotally mounted to said front wall and said means for moving the closure means comprises means for moving one portion of the closure means rearwardly.

References Cited (Backward Citations)

US1348587A Cited
US1860854A Cited
US2324111A Cited
US2528278A Cited
US2659925A Cited
US3005224A Cited
US3089178A Cited
US3550183A Cited
US3862469A Cited
US3942219A Cited
US4254525A Cited
US4416034A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1988-02-19 1988-08-20 1989-02-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1992-02-19 1992-08-20 1993-02-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1996-02-19 1996-08-20 1997-02-19 $7700.00 Window Closed / Lapsed

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