Patent US3760712A successfully refreshed from Google Patents.
US3760712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical unit for brewing infusions, more particularly espresso-coffee
Assignee: Individual
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Filing: 1971-12-01
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Granted: 1973-09-25
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Expires: 1991-12-01
Abstract
Abstract An automatic machine is disclosed, for brewing infusions, more particularly espresso coffee, in which a first cylinder has a first piston reciprocable therein, and into which a second piston can enter, as driven by a stem, for providing a brewing chamber. The distinguishing feature of the machine according to the invention is that a second cylinder is provided, having the same diameter as the first, the second cylinder being movable between a loading position (charge of coffee powder) in which the second cylinder is coaxial with the first, and a second position, in which the second cylinder is far from the first. The second cylinder has a sector, hinged to another sector and the former can be opened against the bias of a spring. The advantage achieved by the invention is to reduce the size and the mechanical intricacy of the assembly to a minimum.
Inventors
- 👤 L Rossi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:06
CPC Classifications
A; A47; A47J; A47J31/00; A47J31/24; A47J31/34; A47J31/36; A47J31/3604; A47J31/3609; A47J31/3619; A47J31/3614
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
183 words
A mechanical unit for the brewing of infusions, more particularly espresso coffee, comprising a first cylinder in whose interior there is a first moveable piston and into which can penetrate, driven by a stem, a second piston thereby forming a brewing chamber between the two pistons, the improvement comprising two component parts; a second cylinder having a diameter equal to the first and open at both ends, moveable between a first position, coaxial with the first cylinder, for loading in the infusion brewing dosage of coffee powder, and a second position, removed from the first cylinder, in which dispensing means for coffee powder feed a unit dosage to the second cylinder which, during the displacement between said two positions, is moveable between the two component parts in sealtight manner with respect to its bases; said second cylinder including a hinged sector which can be opened against a spring bias to allow said second cylinder to be removed from said first cylinder by passing over said stem when the second piston is housed in the first cylinder so as to form a brewing chamber.
Claim 2
Dependent Claim
183 words
A mechanical unit for the brewing of infusions, more particularly espresso coffee, comprising a first cylinder in whose interior there is a first moveable piston and into which can penetrate, driven by a stem, a second piston thereby forming a brewing chamber between the two pistons, the improvement comprising two component parts; a second cylinder having a diameter equal to the first and open at both ends, moveable between a first position, coaxial with the first cylinder, for loading in the infusion brewing dosage of coffee powder, and a second position, removed from the first cylinder, in which dispensing means for coffee powder feed a unit dosage to the second cylinder which, during the displacement between said two positions, is moveable between the two component parts in sealtight manner with respect to its bases; said second cylinder including a hinged sector which can be opened against a spring bias to allow said second cylinder to be removed from said first cylinder by passing over said stem when the second piston is housed in the first cylinder so as to form a brewing chamber.
Claim 3
Dependent Claim
42 words
The mechanical unit according to claim 1, characterized in that said first and second cylinders have vertical axes and the dispensing means feeds a unit dosage to said second cylinder through an opening in the upper wall of said two component parts.
Claim 4
Dependent Claim
40 words
The mechanical unit according to claim 1, characterized in that said first and second cylinders have horizontal axes and the dispensing means feeds a unit dosage to said second cylinder through an opening formed radially through the second cylinder wall.
Claim 5
Dependent Claim
28 words
The mechanical unit according to claim 1, characterized in that said second cylinder is moveable for rotation about an axis parallel to the generating lines of the cylinder.
Claim 6
Dependent Claim
42 words
The mechanical unit according to claim 1, characterized in that the moveable sector of the second cylinder consists of a portion of a surface located between two generating lines and is moved about an axis which is parallel to said generating lines.
Claim 7
Dependent Claim
78 words
The mechanical unit according to claim 1, characterized in that said first piston is moved within said first cylinder from a first position therein, where it forms the base of the brewing chamber, to a second position where its head is aligned with either of said component parts, said second piston being moveable between a position within said first cylinder and a second position in which it has its head aligned with the other of said component parts.
Claim 8
Dependent Claim
40 words
The mechanical unit according to claim 1, characterized in that said first piston effects the stroke necessary to be positioned within said first cylinder under the thRust of said second piston, a unit dosage of coffee powder being inserted therebetween.
Claim 9
Dependent Claim
24 words
The mechanical unit according to claim 7, characterized in that said first piston is braked during its stroke by a substantially constant resistance force.
Claim 10
Dependent Claim
30 words
The mechanical unit according to claim 8, characterized in that said first piston is braked in its stroke by a resistance force which is resilient and proportional to the stroke.
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |