US3761997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner
Assignee: Individual
•
Filing: 1971-05-26
•
Granted: 1973-10-02
•
Expires: 1991-05-26
Abstract
Abstract A cleaning tool or pick-up head for use with a vacuum sweeper, such as an electric vacuum broom, is adapted for connection to the suction tube or hose of a vacuum cleaner. The head is provided with a free-rolling, hollow, floor-engaging roller that is constructed to minimize frictional resistance to hand-operated movement along a rug and the like, while at the same time, to assure a maximized suction pick-up action of dust, etc., through a floor-engaging nozzle of the head. The cylindrical roller is of hollow or cagelike construction, in order that the dirt may be drawn upwardly therethrough, enabling its positioning substantially centrally within the entry mouth of the housing nozzle.
Inventors
- 👤 J Frazier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:09
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/02; A47L9/04; A47L9/0461; A47L9/0466; A47L9/0477
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
185 words
In a cleaning tool for coupling to a vacuum sweeper housing having an active suction force producing means for inducing negative pressure air flow into and through the cleaning tool to pick up dirt from a surface such as a rug or floor, wherein the tool has a nozzle provided with an endwise-elongated open-mouth portion defined by a lip edge thereabout, the improvement which comprises, an elongated roller operatively positioned within the open mouth portion for rotative movement therein and with respect thereto, said roller having a pair of longitudinally spaced-apart surface-engaging wheels that project outwardly through the nozzle beyond the lip edge thereabout, said roller being of unitary construction and having a body with cross-extending connecting portions between said wheels that define open passageways therethrough for bypassing dirt into the nozzle upon the application of negative air pressure thereto, and said roller being adapted to rotate forwardly and backwardly in the direction of movement of said nozzle along the surface to, during such movement, deflect material secured to the surface outwardly that is being drawn towards the nozzle by negative pressure induced air flow.
Claim 2
Dependent Claim
185 words
In a cleaning tool for coupling to a vacuum sweeper housing having an active suction force producing means for inducing negative pressure air flow into and through the cleaning tool to pick up dirt from a surface such as a rug or floor, wherein the tool has a nozzle provided with an endwise-elongated open-mouth portion defined by a lip edge thereabout, the improvement which comprises, an elongated roller operatively positioned within the open mouth portion for rotative movement therein and with respect thereto, said roller having a pair of longitudinally spaced-apart surface-engaging wheels that project outwardly through the nozzle beyond the lip edge thereabout, said roller being of unitary construction and having a body with cross-extending connecting portions between said wheels that define open passageways therethrough for bypassing dirt into the nozzle upon the application of negative air pressure thereto, and said roller being adapted to rotate forwardly and backwardly in the direction of movement of said nozzle along the surface to, during such movement, deflect material secured to the surface outwardly that is being drawn towards the nozzle by negative pressure induced air flow.
Claim 3
Dependent Claim
39 words
In a cleaning tool as defined in claim 1, the body of said roller being constructed of rodlike portions extending across between said pair of wheels and connected thereto adjacent to and at spaced locations along the peripheries thereof.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |