US6030465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extractor with twin, counterrotating agitators
Assignee: Panasonic Corp of North America
•
Filing: 1997-06-20
•
Granted: 2000-02-29
•
Expires: 2017-06-20
Abstract
Abstract An extractor is provided for cleaning carpet or a like surface or material. The extractor includes a housing, a handle, a cleaning liquid delivery system and a cleaning liquid recovery system. The cleaning liquid delivery system includes a cleaning liquid supply tank, first and second aligned agitators preferably in the form of brushes and a gravity feed or pump for delivering cleaning liquid from the supply tank for cleaning. The cleaning liquid recovery system includes a recovery nozzle, a vacuum generator and a dirty cleaning liquid recovery tank. The extractor is further characterized by a manifold for receiving cleaning liquid from the pump and directing the cleaning liquid into a nip defined between the first and second agitators. A drive assembly counterrotates the agitators so that relative rotation of the agitators in the nip is generally away from the manifold and toward the carpet to be cleaned. In accordance with the method of the present invention, cleaning liquid is delivered into the nip defined between the pair of counterrotating agitators. The cleaning liquid is thereby propelled by the counterrotating agitators through the nip deep into the carpet to be cleaned. This is followed by the recovering of the cleaning liquid.
Inventors
- 👤 Henry Marcussen
- 👤 Toshiyuki Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:21
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4036; A47L11/4041; A47L11/34; A47L11/4044; A47L11/408; A47L11/4083; A47L11/4088; A47L5/00; A47L5/12; A47L5/22; A47L5/28; A47L5/30
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
166 words
An extractor for cleaning carpet comprising: a housing supported for movement relative to said carpet to be cleaned; a handle for manipulating and controlling said extractor; a cleaning liquid delivery system carried by said housing, said cleaning liquid delivery system including a cleaning liquid supply tank and first and second aligned agitators; and a cleaning liquid recovery system carried by said housing, said cleaning liquid recovery system including a recovery nozzle, a vacuum generator and a dirty cleaning liquid recovery tank; said extractor being characterized by; a manifold for receiving said cleaning liquid from said supply tank and directing said cleaning liquid into a nip defined between said first and second agitators; and a drive assembly for counterrotating said first and second agitators so that relative rotation of said first and second agitators in said nip is generally away from said manifold and toward said carpet to be cleaned whereby said cleaning fluid is propelled deep into said carpet to provide enhanced penetration and cleaning effect.
Claim 2
Dependent Claim
166 words
An extractor for cleaning carpet comprising: a housing supported for movement relative to said carpet to be cleaned; a handle for manipulating and controlling said extractor; a cleaning liquid delivery system carried by said housing, said cleaning liquid delivery system including a cleaning liquid supply tank and first and second aligned agitators; and a cleaning liquid recovery system carried by said housing, said cleaning liquid recovery system including a recovery nozzle, a vacuum generator and a dirty cleaning liquid recovery tank; said extractor being characterized by; a manifold for receiving said cleaning liquid from said supply tank and directing said cleaning liquid into a nip defined between said first and second agitators; and a drive assembly for counterrotating said first and second agitators so that relative rotation of said first and second agitators in said nip is generally away from said manifold and toward said carpet to be cleaned whereby said cleaning fluid is propelled deep into said carpet to provide enhanced penetration and cleaning effect.
Claim 3
Dependent Claim
30 words
The extractor of claim 1, wherein said recovery nozzle is aligned with and adjacent to said first agitator, said first agitator being rotated in a direction toward said recovery nozzle.
Claim 4
Dependent Claim
41 words
The extractor of claim 1, wherein said manifold includes a longitudinal axis aligned with and parallel to longitudinal axis of said first and second agitators and a series of delivery ports provided in and spaced along said manifold opposite said nip.
Claim 5
Dependent Claim
143 words
An extractor for cleaning carpet comprising: a housing supported for movement relative to said carpet to be cleaned; a handle for manipulating and controlling said extractor; a cleaning liquid delivery system carried by said housing, said cleaning liquid delivery system including a cleaning liquid supply tank and first and second aligned agitators defining a nip therebetween; and a cleaning liquid recovery system carried by said housing, said cleaning liquid recovery system including a recovery nozzle, a vacuum generator and a dirty cleaning liquid recovery tank; said extractor being characterized by; a drive assembly for counterrotating said first and second agitators so that relative rotation of said first and second agitators in said nip is generally away from said housing and toward said carpet to be cleaned whereby said cleaning fluid is propelled deep into said carpet to provide enhanced penetration and cleaning effect.
Claim 6
Dependent Claim
143 words
An extractor for cleaning carpet comprising: a housing supported for movement relative to said carpet to be cleaned; a handle for manipulating and controlling said extractor; a cleaning liquid delivery system carried by said housing, said cleaning liquid delivery system including a cleaning liquid supply tank and first and second aligned agitators defining a nip therebetween; and a cleaning liquid recovery system carried by said housing, said cleaning liquid recovery system including a recovery nozzle, a vacuum generator and a dirty cleaning liquid recovery tank; said extractor being characterized by; a drive assembly for counterrotating said first and second agitators so that relative rotation of said first and second agitators in said nip is generally away from said housing and toward said carpet to be cleaned whereby said cleaning fluid is propelled deep into said carpet to provide enhanced penetration and cleaning effect.
Claim 7
Independent Claim
48 words
A method of cleaning carpet by cleaning liquid extraction, comprising: delivering cleaning liquid into a nip defined between a pair of counterrotating agitators; propelling said cleaning liquid with said pair of counterrotating agitators through said nip deep into said carpet to be cleaned; and recovering said cleaning liquid.
Claim 8
Independent Claim
48 words
A method of cleaning carpet by cleaning liquid extraction, comprising: delivering cleaning liquid into a nip defined between a pair of counterrotating agitators; propelling said cleaning liquid with said pair of counterrotating agitators through said nip deep into said carpet to be cleaned; and recovering said cleaning liquid.
References Cited (Backward Citations)
US1268963A
Cited
US1596041A
Cited
US1938068A
Cited
US2622254A
Cited
US3631558A
Cited
US3624861A
Cited
DE2361894A1
Cited
US4426751A
Cited
US5018240A
Cited
US5299608A
Cited
US5406673A
Cited
US5493752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-02-28 | 2003-08-30 | 2004-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-02-28 | 2007-08-30 | 2008-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-02-28 | 2011-08-30 | 2012-02-29 | $7700.00 | Window Closed / Lapsed |