Patent US4845794A successfully refreshed from Google Patents.
US4845794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for wet cleaning a floor or wall surface
Assignee: Rotowash Scandinavia ApS
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Filing: 1988-11-10
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Granted: 1989-07-11
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Expires: 2008-11-10
Abstract
Abstract An apparatus for wet cleaning floor or wall surfaces comprises one or more cylindrical brushes which may be rotated by a motor so that they are throwing liquid and dirt from the floor or wall surface on to a rotating cylinder or a moving endless belt. Liquid and dirt is continuously removed from the outer peripheral surface of the cylinder or belt by means of a suction nozzle extending along the axial length of the cylinder and immediately adjacent to the peripheral surface thereof. The suction nozzle may have a lower edge functioning as a scraping member which is in contact with the peripheral surface of a cylinder. Liquid and dirt removed from the cylinder by means of the suction nozzle is passed to a container for collecting dirty liquid.
Inventors
- 👤 Henryk Korski
- 👤 Jerzy Korski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:23
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4063; A47L11/4069; A47L11/29; A47L11/292; A47L11/4013; A47L11/4016; A47L11/4036; A47L11/4041; A47L11/4044; A47L11/4047
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
98 words
An apparatus for wet cleaning a floor surface, said apparatus comprising a liquid collecting member defining a movable endless liquid collecting surface thereon, motordriven rotatable brushing means for contacting said floor or wall surface so as to throw dirty washing liquid therefrom on to said liquid collecting surface, a liquid container for collecting dirty washing liquid therein, and transfer means for transferring liquid from the collecting surface to the container, said transfer means including a suction nozzle communicating with the liquid container and being arranged immediately adjacent to the liquid collecting surface so as to suck liquid therefrom.
Claim 2
Independent Claim
98 words
An apparatus for wet cleaning a floor surface, said apparatus comprising a liquid collecting member defining a movable endless liquid collecting surface thereon, motordriven rotatable brushing means for contacting said floor or wall surface so as to throw dirty washing liquid therefrom on to said liquid collecting surface, a liquid container for collecting dirty washing liquid therein, and transfer means for transferring liquid from the collecting surface to the container, said transfer means including a suction nozzle communicating with the liquid container and being arranged immediately adjacent to the liquid collecting surface so as to suck liquid therefrom.
Claim 3
Dependent Claim
15 words
An apparatus according to claim 1, wherein the liquid collecting member comprises a rotatable cylinder.
Claim 4
Dependent Claim
15 words
An apparatus according to claim 1, wherein the liquid collecting member comprises an endless belt.
Claim 5
Dependent Claim
27 words
An apparatus according to claim 1, wherein the suction nozzle extends along substantially the total dimension of the liquid collecting surface transversely to its direction of movement.
Claim 6
Dependent Claim
69 words
An apparatus according to claim 1, wherein the suction nozzle defines a suction slot between a first edge member and a second edge member spaced therefrom in the direction of movement of the collecting surface, the second edge member being formed as a scraping member, which is in contact with the liquid collecting surface and the first edge member being arranged out of engagement with the liquid collecting surface.
Claim 7
Dependent Claim
17 words
An apparatus according to claim 5, wherein said second edge member is made from a flexible material.
Claim 8
Dependent Claim
22 words
An apparatus according to claim 1, wherein the liquid collecting surface is roughened so as to improve the adherence of liquid thereto.
Claim 9
Dependent Claim
13 words
An apparatus according to claim 7, wherein the liquid collecting surface is dimpled.
Claim 10
Independent Claim
114 words
An apparatus for wet cleaning a floor surface, said apparatus comprising a tank for clean washing liquid, means for dispensing liquid from said tank on to the floor surface, a liquid collecting rotatable, cylinder defining a liquid collecting outer cylindrical surface thereon, motor-driven rotatable brushing means for contacting said floor surface so as to throw dirty washing liquid therefrom on to said liquid collecting surface, a liquid container for collecting dirty washing liquid therein, transfer means for transferring liquid from the collecting surface to the container, said transfer means including a suction nozzle communicating with the liquid container and being arranged immediately adjacent to the liquid collecting surface so as to suck liquid therefrom.
Claim 11
Independent Claim
114 words
An apparatus for wet cleaning a floor surface, said apparatus comprising a tank for clean washing liquid, means for dispensing liquid from said tank on to the floor surface, a liquid collecting rotatable, cylinder defining a liquid collecting outer cylindrical surface thereon, motor-driven rotatable brushing means for contacting said floor surface so as to throw dirty washing liquid therefrom on to said liquid collecting surface, a liquid container for collecting dirty washing liquid therein, transfer means for transferring liquid from the collecting surface to the container, said transfer means including a suction nozzle communicating with the liquid container and being arranged immediately adjacent to the liquid collecting surface so as to suck liquid therefrom.
Claim 12
Dependent Claim
22 words
An apparatus according to claim 9, wherein the suction nozzle extends along substantially the total length of the cylindrical liquid collecting surface.
Claim 13
Dependent Claim
69 words
An apparatus according to claim 9, wherein the suction nozzle defines a suction slot between a first edge member and a second edge member spaced therefrom in the direction of rotation of the cylinder, the second edge member being formed as a scraping member, which is in contact with the cylindrical liquid collecting surface, and the first edge member being arranged out of engagement with the liquid collecting surface.
Claim 14
Dependent Claim
16 words
An apparatus according to claim 9, wherein said edge member is made from a flexible material.
Claim 15
Dependent Claim
22 words
An apparatus according to claim 12, wherein the liquid collecting surface is roughened so as to improve the adherence of liquid thereto.
Claim 16
Dependent Claim
13 words
An apparatus according to claim 13, wherein the liquid collecting surface is dimpled.
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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) | 1992-07-10 | 1993-01-09 | 1993-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-10 | 1997-01-09 | 1997-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-10 | 2001-01-09 | 2001-07-11 | $7700.00 | Window Closed / Lapsed |