US4227316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Discharge duct for apparatuses for extracting water from carpets
Assignee: Werner and Mertz GmbH
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Filing: 1979-02-08
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Granted: 1980-10-14
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Expires: 1999-02-08
Abstract
Abstract A liquid-pickup apparatus for carpetry, e.g. for the removal of liquid from the shampooing of a carpet, comprises a slot-shaped compressed air outlet adjacent a discharge duct with an entry slot. The flattened cross-section duct rises at an angle to the horizontal and is subdivided internally into a plurality of channels of substantially the same cross section as the slot and having rounded bases.
Inventors
- 👤 Helmut Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:51
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4036; A47L11/4044; A47L11/34; A47L11/408; A47L11/4088
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
131 words
An apparatus for extracting liquid from a wetted carpet by blowing gas through the carpet, which comprises a gas duct for blowing gas through the carpet and which has a gas exit slot at the lower end thereof; a discharge duct for discharge of a gas/liquid mixture from the carpet and having at a lower end an entry slot adjacent said gas exit slot and an upper end communicating with a liquid container, the discharge duct having an overall cross-section substantially the same as the cross-section of the entry slot; means subdividing said discharge duct into a plurality of separate upwardly extending channels, each of said channels having a base which is curved in cross-section, the channels being inclined at an angle not greater than 60° with respect to the horizontal.
Claim 2
Independent Claim
131 words
An apparatus for extracting liquid from a wetted carpet by blowing gas through the carpet, which comprises a gas duct for blowing gas through the carpet and which has a gas exit slot at the lower end thereof; a discharge duct for discharge of a gas/liquid mixture from the carpet and having at a lower end an entry slot adjacent said gas exit slot and an upper end communicating with a liquid container, the discharge duct having an overall cross-section substantially the same as the cross-section of the entry slot; means subdividing said discharge duct into a plurality of separate upwardly extending channels, each of said channels having a base which is curved in cross-section, the channels being inclined at an angle not greater than 60° with respect to the horizontal.
Claim 3
Dependent Claim
29 words
An apparatus according to claim 1, wherein an upper portion of each channel is formed with a passage which is arched in longitudinal cross-section and communicates with said container.
Claim 4
Dependent Claim
23 words
An apparatus according to claim 1 or 2, which further comprises means for moving the apparatus in a direction relative to the carpet.
Claim 5
Dependent Claim
43 words
An apparatus according to claim 3, wherein the gas exit slot extends transversely of the direction of movement and is downwardly directed towards the carpet; and the entry slot extends parallel to the gas exit slot and opens upwardly into the discharge duct.
Claim 6
Dependent Claim
39 words
An apparatus according to claim 1, which comprises sealing means extending around the gas exit slot and the entry slot so as to prevent escape of gas and liquid to adjacent areas of the carpet not being acted upon.
Claim 7
Dependent Claim
24 words
An apparatus according to claim 1, wherein the liquid container is open at an upper end thereof to receive liquid from the discharge duct.
Claim 8
Dependent Claim
17 words
An apparatus according to claim 1, wherein the angle of inclination of the channels is substantially 45°.
Claim 9
Dependent Claim
16 words
An apparatus according to claim 1, wherein the base of each channel is of semi-elliptical shape.
Claim 10
Dependent Claim
26 words
An apparatus according to claim 8, wherein the ratio of short to long axis of the ellipse is substantially 1:3, the long axis being disposed horizontally.
Claim 11
Dependent Claim
16 words
An apparatus according to claim 1, wherein the width of each channel is substantially 3 cm.
Claim 12
Dependent Claim
19 words
An apparatus according to claim 1, wherein the width and depth of the channels increases in the upward direction.
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) | 1983-10-14 | 1984-04-14 | 1984-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-14 | 1988-04-14 | 1988-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-14 | 1992-04-14 | 1992-10-14 | $7700.00 | Window Closed / Lapsed |