US4823685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for preparing hot drinks
Assignee: BOUMANS PETER MATHIJS
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Filing: 1987-05-14
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Granted: 1989-04-25
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Expires: 2007-05-14
Abstract
Abstract An apparatus for making coffee or other hot drinks from finely divided material and hot water including a space for receiving the water and the material, a filter and a discharge conduit positioned below the filter. A source of gas under pressure is connected to the discharge conduit such that during a selected time the mixture of water and material inside the space can be agitated from below in counterflow to the natural flow of the extract.
Inventors
- 👤 Peter M. Boumans
- 👤 Hendrik J. J. Sobczak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:53
CPC Classifications
A; A47; A47J; A47J31/00; A47J31/002
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
120 words
An apparatus for preparing hot drinks from a beverage material and a liquid comprising: a container for receiving the material and the liquid, a filter positioned so that the brewed hot liquid from said container can pass therethrough, a discharge conduit positioned generally below said filter and having a discharge outlet, a forcing means for forcing a continuous steady flow of gas into said discharge conduit up through said filter and into said container to agitate the material and liquid therein, said forcing means being connected to said discharge conduit at a connection point, a controlling means for adjustably controlling the operation time of said forcing means, and a control valving positioned between said discharge outlet and said connection point.
Claim 2
Independent Claim
120 words
An apparatus for preparing hot drinks from a beverage material and a liquid comprising: a container for receiving the material and the liquid, a filter positioned so that the brewed hot liquid from said container can pass therethrough, a discharge conduit positioned generally below said filter and having a discharge outlet, a forcing means for forcing a continuous steady flow of gas into said discharge conduit up through said filter and into said container to agitate the material and liquid therein, said forcing means being connected to said discharge conduit at a connection point, a controlling means for adjustably controlling the operation time of said forcing means, and a control valving positioned between said discharge outlet and said connection point.
Claim 3
Dependent Claim
14 words
The apparatus of claim 1 wherein said forcing means comprises an electric air pump.
Claim 4
Dependent Claim
20 words
The apparatus of claim 1 wherein said forcing means distributes the forced gas evenly over the surface of said filter.
Claim 5
Dependent Claim
29 words
The apparatus of claim 1 further comprising a nonreturn valving means positioned between said forcing means and said point of connection for preventing fluid flow towards said forcing means.
Claim 6
Dependent Claim
55 words
The apparatus of claim 1 wherein said control valve is a membrane valve including a membrane having a first membrane area on one side controlling the flow through said discharge conduit and a second membrane area on the other side, larger than said first membrane area and exposed to the pressure of a pressurized gas.
Claim 7
Dependent Claim
22 words
The apparatus of claim 5 further comprising a pressure relief valve between said membrane valve and the source of said pressurized gas.
Claim 8
Dependent Claim
23 words
The apparatus of claim 5 further comprising a pressurized gas source for operating said membrane valve which is separate from said forcing means.
Claim 9
Dependent Claim
17 words
The apparatus of claim 1 wherein said beverage material is coffee and said liquid is hot water.
References Cited (Backward Citations)
FR931540A
Cited
US3552976A
Cited
FR1565033A
Cited
US3565641A
Cited
FR2067808A5
Cited
US3666558A
Cited
DE2432141A1
Cited
US4632023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-24 | 1992-10-24 | 1993-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-24 | 1996-10-24 | 1997-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-24 | 2000-10-24 | 2001-04-25 | $7700.00 | Window Closed / Lapsed |