Foods and beverages: apparatus – Beverage – Infusors
Patent
1982-05-20
1984-07-03
Jenkins, Robert W.
Foods and beverages: apparatus
Beverage
Infusors
99289R, 426433, A47J 3100
Patent
active
044572166
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention concerns a coffee machine for producing liquid coffee from coffee powder.
BACKGROUND OF THE INVENTION
Coffee machines are known in a number of different embodiments. Some of these are automatic machines operating with two pistons moving synchronously. In these cases, the quantity of coffee powder though predetermined is not scalded in a loose state with hot water; the result being that the relatively roughly ground coffee powder fails to properly swell-up, causing the aroma to suffer thereby. Therefore, a larger quantity of coffee powder is needed for obtaining and aromatically stronger coffee.
SUMMARY OF THE INVENTION
The invention has as its object the scalding of finely pulverized, loose coffee powder by means of working pistons moving independently of each other in a scalding chamber for thus obtaining aromatically strong coffee from a relatively small quantity of coffee powder. According to the invention, this object is achieved by using a coffee machine having the claimed features. In addition, separately actuated working pistons meter the quantity of coffee powder and thus predetermine the aromatic strength of the coffee produced.
A BRIEF DESCRIPTION OF THE DRAWINGS
The attached drawings show an exemplary embodiment of the coffee machine as described below in the description of the best mode embodiment. In particular,
FIG. 1 shows a lateral view of the coffee machine,
FIG. 2 shows a vertical sectional view,
FIG. 3 shows a sectional view taken along line III--III of FIG. 2,
FIG. 4 shows a vertical sectional view of the upper working piston on taken along line IV--IV of FIG. 5, turned by 180.degree.,
FIG. 5 shows a top view of the upper working piston of FIG. 4,
FIG. 6 shows a vertical sectional view of the lower working piston taken along line VI--VI of FIG. 7,
FIG. 7 shows a top view of the lower working piston of FIG. 6.
DESCRIPTION OF THE BEST MODE EMBODIMENT
Two spaced horizontal carrier plates 1, 2 and two vertical rods 3 constitute the machine frame. The carrier plates 1, 2 are fixedly positioned in relation to the vertical rods by means of bolts 4 engaging grooves provided on the rods 3. A cylinder 5 open both at its upper and its lower end is fixedly mounted within the carrier plate 1. Two pistons, an upper piston 6 and a lower piston 7, are arranged to penetrate the cylinder 5. FIGS. 1 and 2 of the drawing show the upper piston 6 spaced vertically above the cylinder 5. The lower piston 7, on the other hand, partially engages the cylinder 5, being thus in a state of working readiness. When lowered, the piston 6 assumes the position indicated in FIG. 2 by dotted lines and closes the cylinder 5 at the upper end thereof. The space between the pistons 6 and 7 and the inside wall of the cylinder 5 defines a scalding chamber 8 destined to receive the coffee powder from which coffee is intended to be extracted. The outer dimensions of the pistons 6 and 7 are fitted to the inner diameters of the cylinder 5 and the scalding chamber 8. A traverse 10 is fixedly mounted by means of screws 9 to the upper ends of the vertical rods 3. An entrainer 12 provided with ball bearings 11 and displaceable in the vertical direction is positioned on the vertical rods 3. A guide rod 13 fixedly mounted on the entrainer 12 by means of screws 14 is arranged to pass through the carrier plate 1 and to partially engage the carrier plate 2. The guide rod 13 is surrounded by an entrainer bushing 15, which carries a pivot member 16 above the carrier plate 1. Upon rotation of the entrainer bushing 15 the pivot member 16 is taken along and is brought in position above the cylinder 5 or outside of the same. The pivot member 16 is provided with a conical bore 17 downwardly decreasing in diameter, its smallest diameter being equal to the diameter of the scalding chamber 8 within the cylinder 5. A water supply conduit 18, communicating with the passage 19 and opening into the lower side of the piston 6 as shown in FIG. 4, is connected to the piston 6. Lateral distributing channels 2
REFERENCES:
patent: 3266410 (1966-08-01), Novi
patent: 3369478 (1968-02-01), Black
patent: 3760712 (1973-09-01), Rossi
Jenkins Robert W.
Rost Kurt
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