US4565121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for use in preparing infusions
Assignee: Toshiba Home Technology Corp
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Filing: 1984-11-26
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Granted: 1986-01-21
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Expires: 2004-11-26
Abstract
Abstract An apparatus for preparing infusions such as coffee in different forms includes a sealed container in which water is heated so that it can be used either as hot water or steam, a water tank and a heating element for heating the contents of the container. Water in the tank can flow into the container through a conduit containing a check valve. Four conduits have outlets at the top of the container. One of them is connected to an infuser and is adapted to transport hot water. Another conduit is adapted to transport steam which may be used for preparing a cappuccino-like drink or for preheating a receptacle. The other two conduits are for removing high pressure steam from inside the container, one of them having an outlet near the bottom of a subtank which is built as a part of the water tank.
Inventors
- 👤 Yoshio Ohya
- 👤 Junichi Sano
- 👤 Koichi Tamaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:14
CPC Classifications
A; A47; A47J; A47J31/00; A47J31/44; A47J31/54; A47J31/56
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
186 words
An apparatus for use in preparing infusions, said apparatus comprising a water tank, a sealed container having a top, a heating means including a heating element inside said sealed container, a first conduit means connecting said sealed container and said water tank, an infuser means having an inlet and an outlet, a second conduit means connecting said container and said inlet, a third conduit means for conveying steam from said container through said top, a first valve means for controlling the movement of liquid through said second conduit means, a second valve means for controlling the movement of liquid through said third conduit means, a first control switch connected in series with said heating element, said first control switch being adapted to operate said first and second valves, an air vent valve for controlling the removal of steam from said container through a fourth conduit means, a second control switch connected in series with said first control switch and with said air vent valve, and a thermostat adapted to control the temperature inside said container, said thermostat being connected in parallel with said second conotrol switch.
Claim 2
Independent Claim
186 words
An apparatus for use in preparing infusions, said apparatus comprising a water tank, a sealed container having a top, a heating means including a heating element inside said sealed container, a first conduit means connecting said sealed container and said water tank, an infuser means having an inlet and an outlet, a second conduit means connecting said container and said inlet, a third conduit means for conveying steam from said container through said top, a first valve means for controlling the movement of liquid through said second conduit means, a second valve means for controlling the movement of liquid through said third conduit means, a first control switch connected in series with said heating element, said first control switch being adapted to operate said first and second valves, an air vent valve for controlling the removal of steam from said container through a fourth conduit means, a second control switch connected in series with said first control switch and with said air vent valve, and a thermostat adapted to control the temperature inside said container, said thermostat being connected in parallel with said second conotrol switch.
Claim 3
Dependent Claim
65 words
The apparatus of claim 1 further comprising a subtank which is separated from said water tank by a partition, said partition having an opening near the bottom so that the water level in said subtank can be maintained the same as that in said water tank, the bottom of said subtank having a recess, said recess being deeper than the bottom of said water tank.
Claim 4
Dependent Claim
26 words
The apparatus of claim 2 further comprising a fifth conduit means which contains a safety valve and connects said subtank with said container through said top.
Claim 5
Dependent Claim
22 words
The apparatus of claim 1 wherein said fourth conduit means has an end which is positioned near the bottom of said subtank.
Claim 6
Dependent Claim
61 words
The apparatus of claim 1 further comprising a check valve, said first conduit means having a vertical portion, said check valve being disposed in said vertical portion, said check valve being adapted to allow water to flow downward therethrough from said water tank to said container but to prevent water to move upward therethrough from said container to said water tank.
Claim 7
Dependent Claim
52 words
The apparatus of claim 5 wherein said check valve comprises a valve housing, a moving piece disposed inside said valve housing, a valve inlet connected to said water tank, and a valve outlet connected to said container, said check valve being so oriented that said valve inlet is above said valve outlet.
Claim 8
Dependent Claim
25 words
The apparatus of claim 8 wherein said moving piece is made of a thermostable material of specific gravity in the range of 1.05 to 1.15.
Claim 9
Dependent Claim
14 words
The apparatus of claim 1 wherein said first control switch consists of one switch.
Claim 10
Dependent Claim
15 words
The apparatus of claim 1 wherein said container is positioned lower than said water tank.
Claim 11
Dependent Claim
16 words
The apparatus of claim 1 wherein said first, second and air vent valves are operated manually.
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) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |