Patent US4137590A successfully refreshed from Google Patents.
US4137590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for scrubbing carpet
Assignee: Milliken Research Corp
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Filing: 1977-08-02
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Granted: 1979-02-06
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Expires: 1997-08-02
Abstract
Abstract A device for scrubbing carpets having a scrubber which rotates about a point which is driven in a circle wherein the scrubber is pivotably mounted on a frame and the weight of the device is supported by the scrubber and two wheels at the rear of the frame. A press bar may be included at the front of the machine for pressing powdered cleaning composition into the carpet.
Inventors
- 👤 Robert S. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:45
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4063; A47L11/4069; A47L11/02; A47L11/10; A47L11/14; A47L11/16; A47L11/164; A47L11/29; A47L11/292; A47L11/293; A47L11/4036; A47L11/4038; A47L11/4072; A47L11/408
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
185 words
A device for cleaning carpets, comprising: a frame; a plurality of wheels rotatably mounted on said frame and partially supporting said device, said wheels being rotatable about the same axis of rotation; a housing pivotably mounted on said frame, said housing being free to pivot about an axis which is substantially parallel to said carpet, and substantially parallel to the axis of rotation of said wheels; a substantially vertical shaft rotatable supported by said housing; means for rotating said shaft; an orbiting scrubber element rotatably mounted on said shaft, said scrubber element being rotatable about an axis which is substantially parallel to but offset from the axis of rotation of said vertical shaft; said scrubber element supporting the remainder of the weight of the device; means mounted on said frame for spreading coherent powder on said carpet; and means for pressing said powdered cleaning composition into said carpet before said powder encounters said scrubber element as said machine translates over said carpet, said means including a horizontal pressing member mounted on said frame and means for holding said pressing member in contact with said carpet.
Claim 2
Independent Claim
185 words
A device for cleaning carpets, comprising: a frame; a plurality of wheels rotatably mounted on said frame and partially supporting said device, said wheels being rotatable about the same axis of rotation; a housing pivotably mounted on said frame, said housing being free to pivot about an axis which is substantially parallel to said carpet, and substantially parallel to the axis of rotation of said wheels; a substantially vertical shaft rotatable supported by said housing; means for rotating said shaft; an orbiting scrubber element rotatably mounted on said shaft, said scrubber element being rotatable about an axis which is substantially parallel to but offset from the axis of rotation of said vertical shaft; said scrubber element supporting the remainder of the weight of the device; means mounted on said frame for spreading coherent powder on said carpet; and means for pressing said powdered cleaning composition into said carpet before said powder encounters said scrubber element as said machine translates over said carpet, said means including a horizontal pressing member mounted on said frame and means for holding said pressing member in contact with said carpet.
Claim 3
Dependent Claim
64 words
The device of claim 1 wherein said means for spreading coherent powder includes: a powder storage bin mounted on said frame having a foraminous discharge area; a cylinder of pore bearing resilient reticulated foam rotatably mounted within said bin and disposed such that on rotating, it presses against said foraminous discharge area forcing said powder through said perforations; and, means for rotating said cylinder.
Claim 4
Independent Claim
55 words
A device for scrubbing carpets, using powdered cleaning composition, comprising: a frame; scrubbing means rotatably mounted on said frame for agitating powdered cleaning composition in the pile of said carpet; and means mounted on said frame for pressing powdered cleaning composition into the pile of said carpet prior to action thereupon by said scrubbing means.
Claim 5
Independent Claim
55 words
A device for scrubbing carpets, using powdered cleaning composition, comprising: a frame; scrubbing means rotatably mounted on said frame for agitating powdered cleaning composition in the pile of said carpet; and means mounted on said frame for pressing powdered cleaning composition into the pile of said carpet prior to action thereupon by said scrubbing means.
Claim 6
Dependent Claim
32 words
The device of claim 3 further comprising means mounted on said frame for dispensing powdered cleaning composition forward of said means for pressing powdered cleaning composition into the pile of said carpet.
Claim 7
Dependent Claim
35 words
The device of claim 3 wherein said means for pressing powdered cleaning composition into the pile of said carpet includes a horizontal pressing member and means urging said pressing member into contact with said carpet.
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) | 1982-02-05 | 1982-08-07 | 1983-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-05 | 1986-08-07 | 1987-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-05 | 1990-08-07 | 1991-02-06 | $7700.00 | Window Closed / Lapsed |