US4724573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for cleaning carpets
Assignee: K E W INDUSTRI AS
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Filing: 1987-01-13
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Granted: 1988-02-16
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Expires: 2007-01-13
Abstract
Abstract In a carpet cleaning machine with a machine housing (1), two containers (4,5) for fresh and used cleaning liquid respectively and flexible tubing (2,3) connecting the machine housing (1) to at least one liquid ejection nozzle (not shown) and a suction mouthpiece (not shown), each of the two containers (4,5) is removably supported in a space (14) above a substantially horizontal portion (7) of said housing (1) and close to a substantially vertical partition portion (8) of said housing (1), each container preferably being supported by plugs (11) extending outwards and upwards from each side of the partition portion (8) and cooperating with sockets (12) recessed into the sides (10) of the containers adapted to face the partition portion (8). Fluid communication between the machine housing (1) and the containers (4,5) may be established by said plugs (11) being tubular and cooperating with openings (13) in the inner ends of the recessed sockets (12) and/or by means of a valve-cum-connector (not shown) in the bottom of the container cooperating with an upwardly extending connector (15) on the base portion (7). This arrangement makes it easy to remove and replace each container (4,5) independently of the other container (4,5), and in the preferred embodiment shown makes the assembly comprising the machine housing (1) and the container (4,5) easy to handle and manoeuvre. A wheeled carriage (6) provides the requisite mobility.
Inventors
- 👤 Karsten Z. Ostergaard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:46
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/408; A47L11/4083; A47L11/29; A47L11/30; A47L11/4013; A47L11/4016; A47L11/4075
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
207 words
A machine for cleaning carpets and the like and comprising (a) a machine housing (1) containing at least a suction fan, a liquid pump and means for driving same, (b) a first container (4) for uncontaminated cleaning liquid removably supported by said machine housing (1), and (c) a second container (5) for cleaning liquid having been ejected into a carpet or the like and subsequently aspirated by said fan through said suction mouthpiece, said second container (5) also being removably supported by said machine housing (1), (d) flexible tubing (2, 3) allowing communication of said liquid pump with an ejection nozzle, and said fan with a suction mouthpiece, characterized in (e) that said machine housing (1) comprises a substantially horizontal base portion (7) with a partition portion (8) extending substantially vertically upwards therefrom in such a manner to leave a space (14) limited downwardly by a part of said base portion (7) and on one side by said partition portion (8) on each side of same, and (f) that said machine housing (1) is adapted to receive said first (4) and second (5) containers in said spaces (14) resting substantially close to said parts of said base portion (7) and substantially close to said partition portion (8).
Claim 2
Dependent Claim
207 words
A machine for cleaning carpets and the like and comprising (a) a machine housing (1) containing at least a suction fan, a liquid pump and means for driving same, (b) a first container (4) for uncontaminated cleaning liquid removably supported by said machine housing (1), and (c) a second container (5) for cleaning liquid having been ejected into a carpet or the like and subsequently aspirated by said fan through said suction mouthpiece, said second container (5) also being removably supported by said machine housing (1), (d) flexible tubing (2, 3) allowing communication of said liquid pump with an ejection nozzle, and said fan with a suction mouthpiece, characterized in (e) that said machine housing (1) comprises a substantially horizontal base portion (7) with a partition portion (8) extending substantially vertically upwards therefrom in such a manner to leave a space (14) limited downwardly by a part of said base portion (7) and on one side by said partition portion (8) on each side of same, and (f) that said machine housing (1) is adapted to receive said first (4) and second (5) containers in said spaces (14) resting substantially close to said parts of said base portion (7) and substantially close to said partition portion (8).
Claim 3
Dependent Claim
57 words
A machine according to claim, 1 characterized in that said base (7) and partition (8) portions and said first (4) and second (5) containers have such cooperating shapes that the external shape of the machine with said first (4) and said (5) containers in place, is at least approximately that of a cylinder with a vertical axis.
Claim 4
Dependent Claim
111 words
A machine according to claim 1 or 2, characterized in (a) that at least one of said first (4) and second (5) containers in the upper part of its wall (10) adapted to face said partition portion (8) comprises at least one socket (12), the axis of which extends downwards and away from its inner end, and (b) that said partition portion (8) on at least one side adapted to face said container comprises at least one plug (11) adapted to cooperate with said socket (12) to establish mechanical connection between the container and said machine housing (1), when said container is placed in the operating position in said space (14).
Claim 5
Dependent Claim
70 words
A machine according to claim 3, characterized in that said socket (12) comprises an opening (13) communicating with the interior of said second container, and that said cooperating plug (11) on said partition portion (8) is tubular and adapted to establish fluid communication between said second container and fluid conducting means in said partition portion (8), when said second container is placed in the operating position in said space (14).
Claim 6
Dependent Claim
77 words
A machine according to claim 3, characterized by a bottom valve in said first container (4) adapted to establish a connection between the interior of the container and a connector (15) communicating with said liquid pump, when the container is placed in the operating position in said space (14), said connector (15) extending upwards from the upper side of that part of said base portion (7) adapted to face the bottom part of said first container (4).
Claim 7
Dependent Claim
28 words
A machine according to claim 5, characterized in that the first (4) and the second (5) containers are identically shaped, with the exception of their fluid connection elements.
Claim 8
Dependent Claim
78 words
A first (4) or second (5) container for a machine according to claim 1 or 2, characterized in that is comprises a substantially flat inner wall (10) adapted to face said partition portion (8) on said machine housing (1) and a substantially semi-cylindrical outer wall (17) as well as a top wall and a bottom wall, all of said walls having substantially equal thickness, and said inner wall (10) being provided with corrugations (16) to increase its rigidity.
Claim 9
Dependent Claim
38 words
A container according to claim 7, characterized in that it is at least in part made from an at least translucent material of a kind to make is possible to observe the liquid level in the container visually.
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) | 1991-02-15 | 1991-08-17 | 1992-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-15 | 1995-08-17 | 1996-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-15 | 1999-08-17 | 2000-02-16 | $7700.00 | Window Closed / Lapsed |