US4102255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure household coffee machine
Assignee: Individual
•
Filing: 1976-04-19
•
Granted: 1978-07-25
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Expires: 1996-04-19
Abstract
Abstract There is disclosed a machine for preparing so called "espresso" coffee which is particularly suitable for household use. The machine comprises a water container for heating a quantity of water which is then caused to pass under high pressure through a layer of powdered coffee arranged in a percolating chamber. Before reaching the percolating chamber the hot water passes through a coiled tube which is immersed in a cooling fluid separated from the hot water, thus causing a controlled cooling of the hot water passing in the coiled tube. Between the container for the water to be heated and the chamber in which the cooling fluid is arranged there is provided a partition wall having the purpose of limiting heat transfer between the water container and the cooling chamber.
Inventors
- 👤 Luigi Gasparrini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:28
CPC Classifications
A; A47; A47J; A47J31/00; A47J31/24; A47J31/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
207 words
A machine for preparing "espresso" coffee, particularly for use as a home appliance, including a container for the water to be heated and intended to form the coffee drink, a percolation chamber above said water container and including a layer of powdered coffee through which the heated water is caused to percolate under pressure a delivery conduit connected to said percolation chamber to receive and direct said heated water to a container, a pipe extending between said percolation chamber and said water container having one end submerged in the water contained in said water container and another end opening into the bottom of said percolation chamber, a valve in communication with said pipe between said another end and said percolation chamber, and a cooling space surrounding a portion, of said pipe wherein said cooling space is located above said water container and contains a cooling fluid separated from the water in said water container, said cooling space and fluid providing a controlled cooling of said hot water passing in said pipe to cause activation of said coffee charge in said percolation chamber without burning same the machine further comprising a partition wall arranged between said cooling space and said water container for limiting the heat transfer therebetween.
Claim 2
Dependent Claim
207 words
A machine for preparing "espresso" coffee, particularly for use as a home appliance, including a container for the water to be heated and intended to form the coffee drink, a percolation chamber above said water container and including a layer of powdered coffee through which the heated water is caused to percolate under pressure a delivery conduit connected to said percolation chamber to receive and direct said heated water to a container, a pipe extending between said percolation chamber and said water container having one end submerged in the water contained in said water container and another end opening into the bottom of said percolation chamber, a valve in communication with said pipe between said another end and said percolation chamber, and a cooling space surrounding a portion, of said pipe wherein said cooling space is located above said water container and contains a cooling fluid separated from the water in said water container, said cooling space and fluid providing a controlled cooling of said hot water passing in said pipe to cause activation of said coffee charge in said percolation chamber without burning same the machine further comprising a partition wall arranged between said cooling space and said water container for limiting the heat transfer therebetween.
Claim 3
Dependent Claim
17 words
A machine according to claim 1, comprising a neck between said water container and said cooling space.
Claim 4
Dependent Claim
35 words
A machine according to claim 1, wherein said cooling space is configurated to receive an amount of cooling fluid which is substantially twice as great as the amount of water present in said water container.
Claim 5
Dependent Claim
39 words
A machine according to claim 1, further comprising a safety valve between said pipe and said cooling space for putting into communication said water container with said cooling space in the event of excess pressure in said water container.
Claim 6
Dependent Claim
22 words
A machine according to claim 1, further comprising an interchangeable filter carrier for varying the number of coffee drinks to be delivered.
Claim 7
Dependent Claim
56 words
A machine according to claim 5, further comprising a delivery conduit arranged downstream of said filter carrier and having one end supported thereby, a dispensing element removably arranged at the other end of said delivery conduit and having a number of delivery spouts, said dispensing element being interchangeable according to the number of coffee drinks required.
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) | 1981-07-24 | 1982-01-23 | 1982-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-24 | 1986-01-23 | 1986-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-24 | 1990-01-23 | 1990-07-25 | $7700.00 | Window Closed / Lapsed |