CA2012882A1 - Coffee making system - Google Patents

Coffee making system

Info

Publication number
CA2012882A1
CA2012882A1 CA 2012882 CA2012882A CA2012882A1 CA 2012882 A1 CA2012882 A1 CA 2012882A1 CA 2012882 CA2012882 CA 2012882 CA 2012882 A CA2012882 A CA 2012882A CA 2012882 A1 CA2012882 A1 CA 2012882A1
Authority
CA
Canada
Prior art keywords
heating
percolator
container
dripolator
combination
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.)
Abandoned
Application number
CA 2012882
Other languages
French (fr)
Inventor
Lloyd Blake
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to CA 2012882 priority Critical patent/CA2012882A1/en
Publication of CA2012882A1 publication Critical patent/CA2012882A1/en
Abandoned legal-status Critical Current

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Abstract

ABSTRACT OF THE DISCLOSURE

A combination dripolator/percolator is disclosed wherein in addition to the normal dripolator function, the device has been modified to allow for a subsequent percolating step to improve the brewing of the coffee and to reduce the amount of coffee grounds required. The combination dripolator/percolator includes a particular electronic circuit for controlling of various heating elements used to provide the dual function.

Description

2 ~ ~ ~

~IT~; COFFEE MA~E~

FIELD OF THE INV~NTION
The present invention relates to devices for making coffee and other similar hot beverages where water is dispensed through certain particles and the resultant liquid is collected therebelow. In particular, the invention relates to devices which can operate as a combination dripolator/percolator.

BAC~G~OUND OF THE INVENTION
The brewing of hot beverages such as coffee and tea have undergone numerous developments and many structures are shown for the making thereof. With respect to the brewing of coffee, a number of devices have been disclosed which fall into one of two categories, either a percolator or a dripolator. Examples of such devices can be found from the following United States patents: United States Patent 4,448,113; United States Patent 4,381,696; United States Patent 4,721,034; United States Patent 3,935,804; and United States Patent 3,174,424. ~;
United States Patent 3,174,424 describes a device which can operate either as a percolator or as a dripolator. This structure does not operate on the principle of first acting as a dripolator and, after completing that operation, functioning as a percolator to complete the preparation steps.
There remains a need to provide an improved structure which has the advantages of the fast dispensing time of a dripolator in combination with the more efficient operation of a percolator structure.
, SUMMARY OF THE INVENTION
The present invention combines the advantages of a dripolator with the efficiencies of a percolator while allowing for a structure which is convenient to use. The combination dripolator/percolator comprises a top water reservoir having a heating element therein and a closable outlet adjacent the bottom of the reservoir. A filter basket is placed benea~h the :

2 ~ g ~

closable outlet for receiving water and for receiving material such as coffee grounds through which the water will pass. The filter basket includes an outlet port ~n the bottom thereof for allowing the resulting liquid to pass therethrough and be collected within a container located beneath the outlet port.
The container has an open top through which the fluid passes. A
percolator return arrangement is supported on the bottom of the container, with this percolator return arrangement being partially received within the filter means at a point generally above the normal placement of the coffee grounds or like material. A heating means is placed beneath the container for heating of the fluid and causing the fluid to percolate up to the filter means for a second pass through the particles. With this arrangement, liquid is initially passed through the filter means in the manner of a dripolator, whereafter the fluid is returned to the filter means for a second passing through the particles due to heating of the bottom of the container.

BRIEF DEscRIpTIQ~ OF TH~ D~ GS
Preferred embodiments of the invention are shown in the drawings, wherein:
Figure 1 is a perspective view of the dripolator/
percolator;
Figure 2 is a sectional view through the dripolator/
percolator;
Figure 3 is a perspective view showing the loading of the device in preparation for the coffee making process;
Figures 4 and 5 are elevations showing the dripolator function followed by the percolating function; and Figure 6 is a schematic of the electric circuit used for controlling the device.

D~8lhEn DE~BIe~lQN OF TH~ PREFERRED EMBO2IMEWTS
The combination dripolator/percolator 2 has a stand 4 which supports at the top thereof a water reservoir 6. This water reservoir has an inlet 8 by means of which water fills the , ~-: ;: , ' - ' . . , :" 2~3~.~

reser~oir and has a closable outle-t 10 at the bottom of the reservoir which dispenses the heated water into the filter basket 14. At the bottom of the closable outlet 10 is a water dispersing head 12 which ensures proper distribution of the water into the filter basket 14. The filter basket also includes a handle 16 to allow convenient removal thereof as well as a central port 18 for receiving a portion of the percolator ~:~
arrangement 40. The filter basket has an open top 20 for receiving the water from the reservoir when it is dispensed.
The dispensed water strikes the coffee grounds 24, with the resulting fluid passing out of the outlet port 22 of the filter basket.
The combination dripolator/percolator 2 also includes a container 30 for receiving and retaining the dispensed fluid, with this container having an open top 32 sized for receiving and supporting the lower portion of the filter basket 14. In this way, the sidewalls of the filter basket engage the open top 32 and ensure that the fluid enters container 30.
The percolator 40 includes a domed base 42 which rests on the bottom of the container 30 with a percolator tube 44 extending upwardly therefrom and passing through the central -~
port 18 of the filter basket 14 to at least the midway point of - ;-the filter basket or greater, whereby fluid percolated through the percolator arrangement passes up the percolator tube 44 and enters the filter basket at a position above the coffee grounds 24. The base of the stand 4 includes a heating element 50 for providing the energy necessary to cause the fluid to percolate up the percolator arrangement and return to the filter basket.
Associated with the heating element 50 and the heating element 7 provided in the water reservoir 6, is an electric circuit generally shown in Figure 6. Power is provided to the combination dripolator/percolator with a power light indicator identified as 52 and an on/off switch identified as 54.
As illustrated in Figure 3, coffee grounds are dispensed in the filter basket 14 and the filter basket is placed or supported by the container 30, with the percolator ~
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2~8~
WH-7971-90 - ~ -arrangement 40 being received in the container and extending upwardly into the filter basket 1~. Once the coffee grounds have been placed in the filter basket and the filter basket placed on top of the container 30, the combination is placed in the stand 4, as generally indicated in Figure 4. Water in the reservoir 6 is then heated and when it reaches a temperature approaching the boiling temperature of water, it is allowed to dispense through the closable outlet 10, through the water dispersing head 12 and into the filter basket 14. The dispersed fluid then contacts the coffee grounds 24 and eventually passes out of the filter basket 14 into the container 30.
After a predetermined time, the second stage of the operation commences, as generally illustrated in Figure 5. In this embodiment, heat is supplied to heating element 50 resulting in coffee percolating up the percolator arrangement 90 and being dispersed for a second time into the filter basket 14.
The fluid then continues to drip back into the container 30. As can be appreciated, this arrangement should operate for different brewing volumes, for example from 4 to 12 cups of coffee, and the percolating function would vary in accordance with the volume to be prepared. This is accomplished in the present structure by monitoring the heat associated with the electric heating element 50 to provide an estimate of the temperature of the fluid in the container 30. When this fluid reaches a predetermined temperature or a predetermined temperature range, the percolating process is terminated. For lesser volumes of fluid to be prepared, the percolating cycle would therefore be shorter whereas with higher volumes, the percolating cycle would be longer. In this way, the advantages of the dripolator are achieved in combination with the efficiency of a percolator. For example~ in a percolator structure it is already known to increase the percolating time in order to provide a strong cup of coffee and to reduce the percolating time to provide a weaker cup of coffee. In the present structure, the advantages of fast heat-up of the dripolator are combined with the more efficient operation of the ~` 2 ~ 3 ~

percolator and less coffee grounds can be used with the combination structure, as compared to the coffee grounds required for the dripolator alone.
Circuit 100 includes a power supply, in this case indicated as 102, being a 110 volt AC supply. An on/off switch 104 is provided which, in this case, corresponds to the on/off switch 54 of Figures 1 through 5. When this switch is turned on, the current begins to flow through the normally closed contacts of the timer, generally indicated as 106. Associated with switch 104 is a thermal switch or fuse 108 which acts as a safety feature to shut down the unit if excessively high temperatures are encountered. After passing through the timer 106, the current causes heater 110 to be activated which, in this case, corresponds with heating element 7 shown in Figure 2.
This causes the water within the reservoir 6 to heat up and approach the boiling temperature, at which point it is dispensed. Associated with heater 110 is the thermal switch 112 which will disconnect heater 110 once a temperature at or approaching the boiling temperature of water is reached. At this point, the heated water and vapour located within the reservoir is dispensed through the water dispersing head 12 via the closable outlet 10 and enters the filter basket 14. The resulting coffee solution, which ends up in container 30, typically will be at about 70C. This temperature causes the thermistor 114 associated with the heating element 116, which corresponds to heating element 50 of Figure 2, to call for heat.
The microprocessor 118 receives this signal and triggers the silicone control rectifier 120 to turn on heating element 116.
This results in the necessary heat being supplied to the bottom of container 30 to effect a percolating action on the fluid located within the container 30. This percolating action occurs once the fluid has reached a particular temperature and results -in the fluid going up the percolating arrangement, as generally shown in Figure 5. This process continues by continuing to supply power to heating element 116 until the temperature of the coffee solution reaches approximately 97C. This temperature is : -` 2 ~

sensed via the thermistor 114. At this point, the percolating process is complete and heater 2 is shut off by means of the microprocessor.
One additional feature is provided with the circuit, namely that the temperature in the coffee pot is sensed and should it fall below a predetermined temperature such as 80C, the thermistor 114 triggers a response from the microprocessor to cause heating of the fluid in the coffee pot to maintain the temperature thereof, generally in a range of 80 to 85C, for a total duration of about 30 minutes. The timer T1 keeps track of the entire process and will shut down the unit when the 30 minute period, or other suitable period has been reached.
It is also possible to combine the two heating elements H1 and H2 in Figure 6 can be combined into a single heater located at the base of the coffee. In this case the water accumulates in the bottom of the stand and is heated by a common element in the base. The user pours in a further amount of water at the top which due to gravity forces the heated water at the base to disperse through the dispersion head. This approach follows the traditional heating system for a dripolator.
With the present arrangement, it can be recognized that the structure combines the advantages of a dripolator with the more efficient operation of a percolator. In addition, simple modifications can be made to the electric circuit to allow the apparatus to work either solely as a percolator or solely as a dripolator while still providing heat to the resulting f]uid in container 30.Such modifications would exclude the dripolator function by rendering heater H1 non effective during the first cycle and in the case of a pure dripolator heater H2 would only function to maintain the coffee or other liquid warm. Thus, the apparatus allows three functions to occur, i.e. a dripolator function, a percolating function, and a combination dripolator/percolator function automatically controlled by the electric circuit.
Although various preferred embodiments of the present invention have been described herein in detail, it will be 2~2~2 : `

appreciated by those skilled in the art, that variations may be made thereto without departing from the spirit of the invention or the scope of the appended cla~ms. :

Claims (11)

1. A combination dripolator/percolator comprising a top water reservoir having means for heating the water and a closable outlet adjacent the bottom of said reservoir, a filter beneath said closable outlet for receiving water which passes through said outlet, said filter means including an outlet port in the bottom thereof, a container beneath said outlet port having an open top for receiving fluid which passes through said outlet, a percolator return arrangement associated with the bottom of said container and said filter means of a shape and structure to allow heated fluid and vapour to pass therethrough from said container to said filter means, and said heating means for heating the water including means beneath said container for heating fluid within said container.
2. A combination dripolator/percolator as claimed in claim 1 wherein said filter means includes a port for receiving a tube portion of said percolator return arrangement which extends to a midway point or greater of the height of the filter means.
3. A combination dripolator/percolator as claimed in claim 2 wherein said filter means is shaped to be supported by the open top of said container.
4. A combination dripolator/percolator as claimed in claim 1, 2, or 3 wherein said heating means includes electric circuit means for heating said container a predetermined time duration.
5. A combination dripolator/percolator as claimed in claim 1, 2, or 3 wherein said heating means includes electric circuit means for heating said container and heating said water reservoir, said electric circuit means having two heating elements, one of said elements heating said water reservoir and the other heating element heating said container.
6. A combination dripolator/percolator as claimed in claim 1, 2, or 3 wherein said heating means includes electric circuit means for heating said container and heating said waker reservoir, said electric circuit means having two heating elements, one of said elements heating said water reservoir and the other heating element heating said container, said circuit means operating in a manner such that only one of said heating elements operates at one time.
7. A combination dripolator/percolator as claimed in claim 1, 2, or 3 wherein said heating means includes electric circuit means for heating said container and heating said water reservoir, said electric circuit means having two heating elements, one of said elements heating said water reservoir and the other heating element heating said container, said circuit means operating in a manner such that only one of said heating elements operates at one time and heating of said container only occurs for a predetermined time duration.
8. A combination dripolator/percolator as claimed in claim 7 wherein said electric circuit means includes a temperature sensor for sensing the temperature of the liquid in said reservoir and activating the associated heating element when the temperature of the liquid falls below a particular level.
9. A combination dripolator/percolator as claimed in claim 7 wherein said electric circuit means includes means for adjusting the time duration said heating element associated with said container is activated in accordance with the amount of fluid to be processed.
10. A combination dripolator/percolator as claimed in claim 9 wherein said circuit means includes a manual adjustment for varying the time duration the heating element associated with said container operates per cycle.
11. A combination dripolator/percolator as claimed in claim 1,2, or 3 wherein said heating means is a common heating element located in the base of said combination dripolator/percolator.
CA 2012882 1990-03-22 1990-03-22 Coffee making system Abandoned CA2012882A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA 2012882 CA2012882A1 (en) 1990-03-22 1990-03-22 Coffee making system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA 2012882 CA2012882A1 (en) 1990-03-22 1990-03-22 Coffee making system

Publications (1)

Publication Number Publication Date
CA2012882A1 true CA2012882A1 (en) 1991-09-22

Family

ID=4144581

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2012882 Abandoned CA2012882A1 (en) 1990-03-22 1990-03-22 Coffee making system

Country Status (1)

Country Link
CA (1) CA2012882A1 (en)

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