GB1569204A - Machine for making hot beverages - Google Patents

Machine for making hot beverages Download PDF

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Publication number
GB1569204A
GB1569204A GB176077A GB176077A GB1569204A GB 1569204 A GB1569204 A GB 1569204A GB 176077 A GB176077 A GB 176077A GB 176077 A GB176077 A GB 176077A GB 1569204 A GB1569204 A GB 1569204A
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GB
United Kingdom
Prior art keywords
tank
making machine
beverage making
boiler
hot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB176077A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bramah E R
Original Assignee
Bramah E R
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bramah E R filed Critical Bramah E R
Priority to GB176077A priority Critical patent/GB1569204A/en
Publication of GB1569204A publication Critical patent/GB1569204A/en
Expired legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/04—Coffee-making apparatus with rising pipes
    • A47J31/057—Coffee-making apparatus with rising pipes with water container separated from beverage container, the hot water passing the filter only once i.e. classical type of drip coffee makers
    • A47J31/0573—Coffee-making apparatus with rising pipes with water container separated from beverage container, the hot water passing the filter only once i.e. classical type of drip coffee makers with flow through heaters

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Apparatus For Making Beverages (AREA)

Description

(54) MACHINE FOR MAKING HOT BEVERAGES (71) I, EDWARD RODERICK BRA MAH, a British subject, of 7 Wychwood Grove, Chandler's Ford, Eastleigh, Hants, do hereby declare the invention, for which I pray that a patent may be granted to me, and the method by which it is to be performed, to be particularly described in and by the following statement: This invention relates to a machine for making hot beverage, for example coffee or tea, and is concerned more particularly with a hot beverage making machine of the kind comprising a boiler, a tank for supplying cold water to the boiler to fill the boiler with water, and a hot water pipe for conveying hot water from the boiler to a beverage brewing device, the hot water pipe extending above the maximum water level in the tank.Such a machine, which will hereinafter be referred to as a hot beverage making machine of the kind described, has the advantage that the flow of hot water does not commence until the water is boiling in the boiler, the steam in the boiler and the reduced density of the hot water in the hot water pipe compared to the density of the cold water in the inlet causing water to flow from the tank through the boiler and discharge out of the hot water pipe into the brewing device. The boiler can conveniently be heated by an electric heating element.
According to the present invention there is provided a hot beverage making machine of the kind described, wherein the hot water pipe from the boiler extends into the tank to a level above that of the maximum water level in the tank, and then extends downwards to a position immediately above the brewing device, a vent being provided in the part of the pipe in the tank above the maximum water level to prevent syphoning.
It has been found that the hot beverage making machine of the invention has a higher degree of coffee extraction when making coffee, and of tea extraction when making tea, than occurs with prior known conventional constructions of hot beverage making machines of the kind described in which the hot water is discharged from the end of a horizontal pipe before dropping into the brewing device. It is believed that the more effective extraction rate of the machine of the present invention is due to the fact that the discharge end of the hot water pipe extends downwards to a position immediately above the brewing device so that the hot water is delivered in a concentrated jet and is not dispersed in a spray before it contacts the coffee or tea in the brewing device.The hot water is discharged in an intermittent flow, as is frequently the case with hot beverage making machines of the kind described.
In the hot beverage making machine of the invention. the tank preferably has a lid so that there is little or no escape of steam during operation. since the steam in the hot water pipe passes through the vent into the tank where it condenses. In a machine in which the boiler is heated bv an electric coil there is no risk of steam condensation coming into contact with the electric circuit of the heating coil. Moreover the steam in the tank heats up the air therein and thereby assists in maintaining the hot water pipe at an elevated temperature.
In order to deal effectively with any steam which may flow past the vent in the hot water pipe and prevent it escaping out of the machine case. the discharge end of the hot water pipe preferably extends downwards into or through a stub tube sealed in an upright position in an aperture in the base of the tank. the tube extending upwards above the maximum water level in the tank, and an annular space being provided between the hot water pipe and the tube for passage of steam from the brewing device into the tank.
The preferred construction of a coffee making machine according to the invention will now be described, by way of example, with reference to the accompanying drawings, in which: Figure 1 is a perspective view of the machine, Figure 2 is a sectional side elevation of the machine, and Figure 3 is a view taken along the line 111-111 in Figure 2.
The coffee making machine shown in the drawings comprises a base 10 fitted with an electrically heated hot plate 11, a hollow column 12 mounted on the rear of the base and accommodating an electrically heated boiler 13, and a water tank 14 mounted on the top of the column, the water tank projecting forwardly above the base. The space between the water tank and the hot plate is large enough to accommodate a coffee brewing device consisting of a flask 15 resting on the hot plate and a filter funnel 16 suspended from the underside of the water tank.
The water tank comprises a container having a flat bottom 20, four side walls 21 and a detachable lid 22 resting on the upper edges of the side walls. The water tank is provided with an outlet tube 23 the upper end of which is sealed in an aperture in the bottom of the tank at the rear thereof. and a large diameter upright tube 26 the lower end of which is sealed in an aperture in the bottom of the tank and the upper end of which terminates inside the tank but above the maximum designed level of water therein. The tube 26 is positioned directly above the filter funnel. The underside of the tank is fitted with two side rails 27 for reception of side flanges (not shown) on the upper edges of the filter funnel 16. wherebv the funnel is suspended from the tank.The lid 22 consists of a rear section 28 and a front section 29 hinged to the rear section. the rear section being a close fit on the side walls but the front section being a loose fit on the side walls so that it can readilv be lifted when adding water to the tank.
The boiler comprises a cylindrical drum 32, an inlet tube 33 opening into the bottom of the drum, an outlet tube 34 leading from the top of the drum. and an electrical heating coil 35 wound around the drum. The inlet tube 33 is connected bv a flexible tube 30 to the lower end of the tube 23 on the water tank, and the outlet tube 34 on the boiler is connected by a flexible tube 31 to one end of a hot water pipe 36 which is substantially the shape of an inverted U and has an upright portion 38 extending through an aperture in the base of the tank into the interior of the tank, the portion 38 being sealed in the aperture. portion 39 positioned between the lid 22 and the maximum water level in the tank and inclined upwardly at an angle of approximately 5 degrees in the direction of flow through the pipe and a further portion 40 which extends downwards through the tube 26. The portion 38, of the pipe 36 is fitted with a sleeve 37 of silicone rubber which insulates the pipe against loss of heat to water in the tank. The tube 26 is substantially larger in diameter than the pipe 36. and the annular air gap between the portion 40 and the tube 26 forms a passageway 42 for steam from the filter funnel to enter the container. The inclined portion 39 of the outlet tube is provided with a vent 44.
The vent 44 is positioned at the highest point of the inclined portion 39 of the hot water pipe so that, when hot water ceases to flow along the hot water pipe due to the tank being empty or the heating coil of the boiler being switched off. any water at the top end of the inclined portion 39 will drain backwards down the pipe and into the boiler. This ensures that no water will drip from the discharge end of the hot water pipe when the machine is not in operation. and there will be no risk of an operator scalding his hand when removing the filter funnel.
To operate the coffee making machine, the front section 29 of the lid on the tank is folded upwards and water is poured into the tank up to a maximum level just below the top of the tube 26. the water from the tank flowing down the tubes 23. 33 to fill the boiler and rise up the outlet tube 34 and the hot water pipe 36 to the level of the water in the tank. The filter funnel 16 containing a filter paper and a measured amount of ground coffee is placed in position under the tank. and the flask 15 is placed on the hot plate below the funnel 16. The electric coil 35 is then energised to heat the water in the boiler.
When the water boils in the boiler, the hot water rises up the portion 38 of the hot water pipe (for the reasons explained hereinbefore) and flows along portion 39 and down portion 40 into the funnel. Liquid coffee brewed in the funnel drains into the flask 15. Steam in the hot water pipe 36 escapes through the vent opening 44 into the interior of the tank where it condenses. Any steam emerging from the pipe 36 into the filter funnel 16 tends to rise upwards through the passageway 42 into the interior of the tank where it condenses. When the flask contains a desired quantity of liquid coffee the electric coil 35 is de-energised and. when the water ceases to boil. the water level in the outlet tube drops below the inclined portion 39 and water no longer flows into the funnel 16. The vent 44 prevents svphoning of the water through the hot water pipe 36.
The beverage making machine described above can conveniently be made in steel or plastics material. If made in steel, the base, column and tank can be made separately and then screwed, welded or otherwise secured together to form the frame structure of the machine. The boiler together with the inlet and outlet tubes can be inserted in the structure after the tank has been fitted with the hot water pipe 36 and assembled on the column and base. Also, the boiler together with the inlet and outlet tubes can be replaced without separating the tank from the column.
The base and the water tank may be circular in plan view, instead of rectangular as shown, to simplify manufacture.
The arrangement of the vent in the interior of the water tank has the advantage that any steam emerging from the vent condenses in the tank and there is no risk of steam condensation coming into contact with the electric circuit of the heating coil.
The position of the water tank on the top of the column and the provision of a lid which can be opened without disturbing other components of the machine facilitates operation of the machine. Also the positioning of the tank above both the boiler and the filter funnel enables the tank to be of large capacity.
The tank may, if desired. be mounted on the front of the column adjacent the top thereof. The hot water pipe from the boiler can then conveniently extend over the top edge of a side wall of the tank instead of through the bottom of the tank as shown in the drawings.
WHAT I CLAIM IS: 1. A hot beverage making machine of the kind described, wherein the hot water pipe from the boiler extends into the tank to a level above that of the maximum water level in the tank, and then extends downwards to a position immediately above the brewing device, a vent being provided in the part of the pipe in the tank above the maximum water level to prevent syphoning.
2. A hot beverage making machine as claimed in claim 1, wherein the tank is provided with a lid.
3. A hot beverage making machine as claimed in claim 1 or 2. wherein the tank is provided with an upright stub tube sealed in an aperture in the base of the tank. the tube extending upwards above the maximum water level in the tank. and the discharge end of the hot water pipe extends downwards into or through the tube. an annular space being provided between the hot water pipe and the tube for passage of steam from the brewing device into the tank.
4. A hot beverage making machine as claimed in claim 3, wherein the brewing device is suspended from the underside of the tank.
5. A hot beverage making machine as claimed in claim 4, wherein the brewing device comprises a filter funnel detachably mounted on guide rails on the underside of the tank.
6. A hot beverage making machine as claimed in anv of the preceding claims, wherein the hot water pipe extends from the boiler upwards into the tank through an aperture in the base of the tank, the pipe being sealed in said aperture and the part of the pipe between the base of the tank and the maximum water level being fitted with a sleeve of heat insulating material.
7. A hot beverage making machine as claimed in any of the preceding claims, wherein part of the hot water pipe in the tank above the maximum water level is inclined upwardly in the direction of flow of water through the pipe.
X. A hot beverage making machine as claimed in claim 7. wherein said part of the hot water pipe is inclined at an angle of approximately 5C/c to the horizontal.
9. A hot beverage making machine as claimed in claim 7 or 8, wherein the vent is positioned or adjacent the highest point in the hot water pipe.
10. A hot beverage making machine as claimed in any of the preceding claims wherein the frame of the machine comprises a hollow upright column mounted on one side of a base. the boiler is located in the column. the tank is mounted on the top of the column and extends above the base, and the brewing device is suspended from the underside of the tank.
II. A hot beverage making machine as claimed in anv of claims 1-9, wherein the frame of the machine comprises a hollow upright column mounted on one side of the base, the boiler is located in the column, the tank is mounted on the front of the column and extends above the base, the hot water pipe extends upwards from the boiler and over the side of the tank, and the brewing device is suspended from the underside of the tank.
12. A hot beverage making machine as claimed in claim 2. wherein the lid on the tank consists of two sections hinged together. one section being fixed on the tank and the other section being pivotable
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (14)

**WARNING** start of CLMS field may overlap end of DESC **. plastics material. If made in steel, the base, column and tank can be made separately and then screwed, welded or otherwise secured together to form the frame structure of the machine. The boiler together with the inlet and outlet tubes can be inserted in the structure after the tank has been fitted with the hot water pipe 36 and assembled on the column and base. Also, the boiler together with the inlet and outlet tubes can be replaced without separating the tank from the column. The base and the water tank may be circular in plan view, instead of rectangular as shown, to simplify manufacture. The arrangement of the vent in the interior of the water tank has the advantage that any steam emerging from the vent condenses in the tank and there is no risk of steam condensation coming into contact with the electric circuit of the heating coil. The position of the water tank on the top of the column and the provision of a lid which can be opened without disturbing other components of the machine facilitates operation of the machine. Also the positioning of the tank above both the boiler and the filter funnel enables the tank to be of large capacity. The tank may, if desired. be mounted on the front of the column adjacent the top thereof. The hot water pipe from the boiler can then conveniently extend over the top edge of a side wall of the tank instead of through the bottom of the tank as shown in the drawings. WHAT I CLAIM IS:
1. A hot beverage making machine of the kind described, wherein the hot water pipe from the boiler extends into the tank to a level above that of the maximum water level in the tank, and then extends downwards to a position immediately above the brewing device, a vent being provided in the part of the pipe in the tank above the maximum water level to prevent syphoning.
2. A hot beverage making machine as claimed in claim 1, wherein the tank is provided with a lid.
3. A hot beverage making machine as claimed in claim 1 or 2. wherein the tank is provided with an upright stub tube sealed in an aperture in the base of the tank. the tube extending upwards above the maximum water level in the tank. and the discharge end of the hot water pipe extends downwards into or through the tube. an annular space being provided between the hot water pipe and the tube for passage of steam from the brewing device into the tank.
4. A hot beverage making machine as claimed in claim 3, wherein the brewing device is suspended from the underside of the tank.
5. A hot beverage making machine as claimed in claim 4, wherein the brewing device comprises a filter funnel detachably mounted on guide rails on the underside of the tank.
6. A hot beverage making machine as claimed in anv of the preceding claims, wherein the hot water pipe extends from the boiler upwards into the tank through an aperture in the base of the tank, the pipe being sealed in said aperture and the part of the pipe between the base of the tank and the maximum water level being fitted with a sleeve of heat insulating material.
7. A hot beverage making machine as claimed in any of the preceding claims, wherein part of the hot water pipe in the tank above the maximum water level is inclined upwardly in the direction of flow of water through the pipe.
X. A hot beverage making machine as claimed in claim 7. wherein said part of the hot water pipe is inclined at an angle of approximately 5C/c to the horizontal.
9. A hot beverage making machine as claimed in claim 7 or 8, wherein the vent is positioned or adjacent the highest point in the hot water pipe.
10. A hot beverage making machine as claimed in any of the preceding claims wherein the frame of the machine comprises a hollow upright column mounted on one side of a base. the boiler is located in the column. the tank is mounted on the top of the column and extends above the base, and the brewing device is suspended from the underside of the tank.
II. A hot beverage making machine as claimed in anv of claims 1-9, wherein the frame of the machine comprises a hollow upright column mounted on one side of the base, the boiler is located in the column, the tank is mounted on the front of the column and extends above the base, the hot water pipe extends upwards from the boiler and over the side of the tank, and the brewing device is suspended from the underside of the tank.
12. A hot beverage making machine as claimed in claim 2. wherein the lid on the tank consists of two sections hinged together. one section being fixed on the tank and the other section being pivotable
upwards to provide access to the interior of the tank for filling with water.
13. A hot beverage making machine as claimed in claim 12, wherein said one section of the lid is a close fit on the side walls of the tank and the other section is a loose fit so that it can readily be lifted.
14. A hot beverage making machine substantially as hereinbefore described with reference to the accompanying drawings.
GB176077A 1978-03-31 1978-03-31 Machine for making hot beverages Expired GB1569204A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB176077A GB1569204A (en) 1978-03-31 1978-03-31 Machine for making hot beverages

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB176077A GB1569204A (en) 1978-03-31 1978-03-31 Machine for making hot beverages

Publications (1)

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GB1569204A true GB1569204A (en) 1980-06-11

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GB176077A Expired GB1569204A (en) 1978-03-31 1978-03-31 Machine for making hot beverages

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GB (1) GB1569204A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4356382A (en) * 1980-08-28 1982-10-26 General Electric Company Drip coffeemaker having a condenser eliminating delivery of steam to the water spreader
US4361750A (en) * 1980-08-28 1982-11-30 General Electric Company Drip coffeemaker having a condenser eliminating delivery of steam to the water spreader
EP0342336A2 (en) * 1988-05-18 1989-11-23 Robert Krups GmbH & Co. KG Device for preparing hot beverages such as coffee, tea or the like

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4356382A (en) * 1980-08-28 1982-10-26 General Electric Company Drip coffeemaker having a condenser eliminating delivery of steam to the water spreader
US4361750A (en) * 1980-08-28 1982-11-30 General Electric Company Drip coffeemaker having a condenser eliminating delivery of steam to the water spreader
EP0342336A2 (en) * 1988-05-18 1989-11-23 Robert Krups GmbH & Co. KG Device for preparing hot beverages such as coffee, tea or the like
EP0342336A3 (en) * 1988-05-18 1990-04-18 Robert Krups Stiftung & Co. Kg. Device for preparing hot beverages such as coffee, tea or the like

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee