Reduced temperature coffee brewer

A beverage brewing appliance for producing a brewed beverage having a serving temperature within a predetermined serving temperature range. The beverage brewing appliance includes a brewing apparatus for infusing a beverage brewing substance retained therein to extract a brewed beverage therefrom. The appliance also includes a first water source having a water heater coupled thereto for delivering water to the brewing apparatus within a predetermined range of brewing temperatures to produce a desired brewed beverage. The brewing appliance also includes a second water source which delivers temperature reduction water to the brewed beverage within a temperature range which, when mixed with the brewed beverage results in a final beverage dispensed from the brewing apparatus within a predetermined serving temperature ranges. The second water source is controlled to deliver a desired quantity of temperature reduction water which will result in the beverage being dispensed within the predetermined range of serving temperatures.

BACKGROUND 
The present invention relates to beverage brewing apparatus and more 
specifically to a beverage brewing apparatus, as well as a method for 
brewing beverages, which produces a brewed beverage within a desired 
beverage serving temperature range. 
Recently, it has been discovered to be desirable to serve brewed beverages 
at a temperature which is within a serving temperature range which is 
lower than the temperature at which the beverage is brewed. The serving 
temperature is an elevated temperature satisfying a number of requirements 
for brewed beverages but which is lower than a temperature at which a 
beverage is brewed. Often, it is desirable to brew a beverage using water 
having a temperature near or below boiling, i.e. 200.degree. 
F.+5.degree./-10.degree.. Through substantial effort, the brewing 
temperature has been arrived at so that the proper flavor of the brewed 
beverage is achieved by extraction of certain oils, solids and other 
characteristics from a beverage brewing substance. When a brewing 
temperature substantially under 200.degree. F. is used, the same 
characteristics are not extracted from the beverage brewing substance. 
It is important to the food service industry that the characteristics and 
quality of the brewed beverages which they serve to their patrons are 
maintained at a high quality and consistency. While it is advantageous to 
serve the brewed beverages at lower temperatures, such lower temperatures 
would jeopardize the quality, flavor, aroma and other characteristics of 
the brewed beverage. As such, there is a need to provide a beverage 
brewing appliance which brews a beverage using brewing water at a brewing 
temperature and dispenses the beverage into a receptacle at a serving 
temperature which is lower than the brewing temperature. It should be 
noted, that while some heat is lost during the brewing process, the heat 
loss generally is only a few degrees and is not sufficient to lower the 
temperature to a preferred serving temperature. 
A variety of devices have been produced for use in brewing tea. These 
devices are mentioned herein as background since they employ a brewing 
appliance which brews a tea concentrate and then dilutes the concentrate. 
These devices have been designed specifically for use in brewing tea or 
for brewing coffee or tea using the same device upon making modifications 
thereto. 
U.S. Pat. No. 4,920,871 to Anson et al., U.S. Pat. No. 5,025,714 to Brewer, 
and U.S. Pat. No. 5,113,752 to Brewer (all assigned to the Assignee of the 
present invention upon the filing of the present application) shows some 
form of tea brewing device as mentioned hereinabove. These devices produce 
a tea concentrate and then introduce water to dilute the tea concentrate. 
Advantageously, each of the devices employs a double wall brewing funnel. 
Such a brewing funnel provides an interior chamber for retaining a brewing 
substance and a passage between the interior chamber and the outer funnel 
wall for passage of water therethrough. The double walled funnel provides 
the advantage of dispensing the dilution water used to dilute the tea 
concentrate and the point at which the tea concentrate is dispensed into a 
receptacle. 
None of the above-referenced devices attempt to produce a brewed beverage 
having a serving temperature within a predetermined serving temperature 
range. In each of these devices, the goal is to provide iced tea having a 
desired dilution without any discussion of moderating the serving 
temperature. 
As such, heretofore, Applicant does not know of any brewing appliances 
which brew a beverage at a desired brewing temperature and dispense the 
brewed beverage at a desired serving temperature. 
OBJECTS AND SUMMARY 
A general object satisfied by the invention is to brew a beverage at a 
brewing temperature to produce desired beverage brewing characteristics 
and dispense the beverage for serving at a desired serving temperature. 
Another object satisfied by the invention is to provide a beverage brewing 
appliance which eliminates operator interaction during each brew cycle to 
achieve a desired serving temperature. 
Yet another object satisfied by the invention is to produce a brewed 
beverage having desired brewed characteristics which are achieved by 
brewing at a desired brewing temperature yet dispensing the brewed 
beverage at a serving temperature. 
Briefly, and in accordance with the foregoing, the present invention 
envisions a beverage brewing appliance for producing a brewed beverage 
having a serving temperature within a predetermined serving temperature 
range. The beverage brewing appliance includes a brewing apparatus for 
infusing a beverage brewing substance retained therein to extract a brewed 
beverage therefrom. The appliance also includes a first water source 
having a water heater coupled thereto for delivering water to the brewing 
apparatus within a predetermined range of brewing temperatures to produce 
a desired brewed beverage. The brewing appliance also includes a second 
water source which delivers temperature reduction water to the brewed 
beverage within a temperature range which, when mixed with the brewed 
beverage results in a final beverage dispensed from the brewing apparatus 
within a predetermined serving temperature range. The second water source 
is controlled to deliver a desired quantity of temperature reduction water 
which will result in the beverage being dispensed within the predetermined 
range of serving temperatures.

DESCRIPTION 
While the present invention may be susceptible to embodiment in different 
forms, there is shown in the drawings, and herein will be described in 
detail, embodiments with the understanding that the present description is 
to be considered an exemplification of the principles of the invention and 
is not intended to limit the invention to that as illustrated and 
described herein. 
A beverage brewing appliance 20 is shown in FIG. 1 which includes a housing 
or body portion 22, an overhanging section 24 of the body portion, and a 
brewing funnel 26 retained under the overhanging section 24. A warmer 
plate section 28 is positioned underneath the overhanging section 24 so 
that a receptacle 30 may be positioned thereon to collect a brewed 
beverage dispensed from the brewing funnel 26. The collected brewing 
substance retained in the receptacle 30 is maintained at a desirable 
temperature by a warming device 32 of the warmer section 28. A faucet 34 
is provided extending from the housing 22 so that heated water may be 
dispensed for use in a variety of preparations including tea, or instant 
foods such as soups and cereals. 
The beverage brewing appliance 20 as shown in FIG. 1 is shown for purposes 
of example only and is not intended to limit the invention claimed herein 
to only the type of device as illustrated. To the contrary, the present 
invention may be embodied in a number of beverage brewing appliances which 
may include a number of different housing 22 structures, receptacle 30 
structures and may or may not include a faucet 34. 
A broad general diagrammatic representation of the present invention is 
shown in FIG. 2. The overall general diagrammatic illustration as shown in 
FIG. 2 will be elaborated on and more fully described with reference to 
FIGS. 3 and 4. In order to describe the overall general concept of the 
invention, however, FIG. 2 is provided and described herein. In FIG. 2, a 
brewing apparatus 36 is provided for infusing a beverage brewing 
substance. The beverage brewing substance is retained in the beverage 
brewing apparatus 36 and infused with water within a desired brewing 
temperature range, generally 200.degree. F.+5.degree./-10.degree. F. A 
first water source 38 is coupled to the brewing apparatus 36 for 
delivering water thereto. A water heater 40 is coupled to the first water 
source 38 in order to heat the water from the first water source 38 to the 
desired brewing temperature. In this regard, the first water source 38 
provides water at an initial temperature 42 whereupon the water heater 40 
heats the water from the first water source 38 to provide heated water 44 
within a desired brewing temperature range. The beverage brewing substance 
retained in the brewing apparatus 36 is infused with the water 44 within 
the desired brewing temperature range. The resultant infusion is dispensed 
from the brewing apparatus 36 as a brewed beverage 46 having a temperature 
substantially on the order of the brewing water 44. 
A second water source 48 is employed to provide temperature reduction water 
50 which is mixed with the brewed beverage 46 dispensed from the brewing 
apparatus 36 to provide a final brewed beverage 52 having a temperature 
within a predetermined serving temperature range. A regulator 54 is 
associated with the second water source 48 in order to controllably 
deliver temperature reduction water 50 which is at least less than the 
brewing temperature of the water 44 from the first water source 38 so as 
to produce a reduction in the temperature to produce the final brewed 
beverage 52 within the desired serving temperature range. The final brewed 
beverage 52 is dispensed into the receptacle 30 for serving. The present 
invention may be controlled to produce a final brewed beverage 52 having a 
final serving temperature of 180.degree. F.-190.degree. F. The present 
invention also may be controlled to provide beverages having serving 
temperatures of, for example, 165.degree. F. or lower while still 
maintaining a consistent high quality brewed beverage having essentially 
all of the desired characteristics of a beverage served at 200.degree. F. 
The present invention controllably brews a beverage at an optimum brewing 
temperature to achieve desired brewed characteristics and serves the 
beverage at a desired serving temperature. 
The present invention, as will be described in further detail hereinbelow, 
may be embodied in more than one version while achieving substantially the 
same results. The overall function of the present invention provides a 
final brewed beverage 52 directly dispensed from the brewing apparatus 36 
into a receptacle 30 to prevent unintended tampering or inadvertent 
alteration which might otherwise change the desired serving temperature 
range of the final brewed beverage 52. By controlling the quantity and/or 
temperature of the temperature reduction water 50 mixed with the initial 
brewed beverage 46, the final brewed beverage 52 will be consistently 
within a desired serving temperature range. Additionally, the final brewed 
beverage 52 will provide the expected high quality coffee characteristics 
since the brewing water 44 will be at a desired brewing temperature 
thereby extracting the desired levels of flavors, oils, solids, and other 
components of the brewed beverage. 
As an example of the present invention as shown in FIG. 2 and consistent 
with FIGS. 3 and 4 to be described hereinbelow, the invention is used to 
brew a brewed beverage at 200.degree. F. yet the beverage which is 
dispensed into the receptacle will be at approximately 165.degree. F. This 
example may be represented in mathematical terms such that if "X" 
represents hot water, "Y" represents temperature reduction water, and 64 
ounces of brewed beverage is desired, the equation is: 
EQU X+Y=64 oz. 
As such, a quantity of hot water, "X", and a quantity of cold water, "Y" is 
combined to produce 64 ounces of brewed beverage. If a finished beverage 
(52) is desired to have a serving temperature of 150.degree. F., and the 
water from the second source 48 has a temperature of 40.degree. F., then: 
EQU 64(165)=X(200)+(64-X)40 
EQU 64(165)=X(200)+(64-X)40 
EQU X=50 oz. and 
EQU Y=14 oz. 
If a finished beverage 52 is desired to have a serving temperature of 
165.degree. F. and the water supplied by the second water source 48 is at 
85.degree. F. then: 
EQU 65(165)=X(200)+Y(85) 
EQU 64(165)=X(200)+(64-X)(85) 
EQU X=44.5 oz. 
EQU Y=19.5 oz. 
As can be seen, the equations can produce a quantity of brewed beverage 
having a desired temperature in a rather precise manner. In practice, a 
differentiation of approximately 3 to 5 ounces may occur between the 
brewing water and the temperature reduction water. This differentiation 
has a minor effect on the final serving temperature. Additionally, the 
warming device 32 may be controlled to maintain the desired serving 
temperature, for example, 165.degree. F., so that the desired temperature 
range is maintained. 
With further reference to FIG. 3, the beverage brewing appliance 20 is 
shown schematically. The beverage brewing apparatus 36 is generally shown 
as the brew funnel 26, a spray head 56 coupled to the first water source 
38, and a timer controlled solenoid valve 58 coupled to a pressurized 
feedline 60 which brings water to the beverage brewing appliance 20. The 
first water source 38 includes a heated reservoir 62 and a first filling 
line 64 which connects to the feedline 60 to bring water from the feedline 
60 to the reservoir 62 and a first delivery line 66. The first delivery 
line 66 communicates with the heated water reservoir 62 to transport water 
from the reservoir 62 to the beverage brewing apparatus 36 so that the 
beverage brewing substance may be infused with water heated within a 
brewing temperature range. 
While a pressurized feedline 60 is shown, it is envisioned that a pourover 
basin may be associated with the beverage brewing 20 to provide a source 
of water for the brewing process. The pourover basin will provide 
essentially the same results as the feedline 60. 
The second water source 48 includes a second delivery line 68 which is 
connected to the feedline 60 to deliver water from the feedline 60 to the 
beverage brewing apparatus 36 for mixing with a brewed beverage as 
described hereinabove and in greater detail hereinafter. The control valve 
58 connected to the feedline 60 provides a metered quantity of water to 
the beverage brewing apparatus 36 upon initiation of a beverage brewing 
cycle. The control valve 58 is controlled by a controller 70 over control 
line 71. Since both the first feedline 64 and the second delivery line 68 
connect to the feedline 60 downstream from the control valve 58 the 
metered quantity of water will flow into both lines 64, 68 to dispense a 
desired quantity of water for producing a desired quantity of brewed 
beverage. A regulator 72 is coupled to the second delivery line 68 so as 
to regulate how much water passing through the control valve 58 passes 
through the second delivery line 68. The regulator 72 meters the quantity 
of water which passes through the second delivery line 68 and thus how 
much temperature reduction water 50 is added to the brewed beverage 46 to 
produce the final brewed beverage 52. The regulator 72 is shown as being a 
controllable solenoid valve connected to the controller 70 over control 
line 74. It is also envisioned that the regulator 72 may be a manually 
controllably needle valve which is manually controllable to meter only a 
desired quantity of water through the second delivery line 68. 
An additional advantage of the present invention is that while it is 
designed to produce a brewed beverage having a serving temperature within 
a desired serving temperature range, it can also be converted or reverted 
to a brewing device which produces a brewed beverage solely employing the 
first water source 38. In this regard, in situations where the serving 
temperature may not be of concern, the second water source 48 may be 
turned off thereby requiring all of the water to produce the brewed 
beverage to come from the first water source 38. In this regard, the 
regulator 54, when embodied as the automatic solenoid valve, may be 
controlled by the controller 70 to prevent flow through the second 
delivery line 68. In the same regard, if the regulator 54 is embodied as 
the needle valve, the needle valve may be controlled to be shut off to 
prevent flow of water through the second delivery line 68. 
As shown in both FIGS. 3 and 4, a heated water dispenser assembly 76 may be 
provided with the beverage brewing apparatus 20. The heated water 
dispenser 76 connects to the faucet 34 and dispenses heated water at a 
temperature, for example 155.degree. F., which is sufficient to properly 
prepare instant foods such as soups, cereals and teas. The heated water 
dispenser water is generally substantially cooler than the 200.degree. 
F.+5.degree. F./-10.degree. F. temperature of the brewing water. 
As shown in FIG. 3, the heated water dispenser assembly 76 connects at one 
end 78 to the feedline 60 upstream of the solenoid valve 58 and at a 
second end 80 to the faucet 34. The heated water dispenser assembly 76 
includes a reduced temperature line 82 and a heated water line 84. A heat 
transfer section 86 is coupled to the heated water line 84 and passes 
through the heated water reservoir 62 in order to heat the water passing 
through the heated water line 84. A dispenser regulator 88 is coupled to 
the reduced temperature line 82 and to the controller 70 over line 89 in 
order to meter a predetermined quantity of water to the faucet 34 in a 
manner similar to the regulator 72 as discussed hereinabove. 
The heated water dispenser 76 provides an essentially closed loop system in 
order to prevent an depletion of the heated water retained in the heated 
water reservoir 62. This closed loop configuration helps to assure that 
the reservoir 62 maintains a desired quantity of heated water for brewing 
at all times. This prevents a drain of the brewing readiness on the 
brewing appliance 20 while still providing a source of heated water. In 
the closed loop, the heat transfer section 86 prevents commingling of the 
heated water dispenser 76 water with the brewing water retained in the 
heated reservoir 62. Additionally, water for the heated water dispenser 76 
is taken from the feedline 60 independent of the control valve 58. In this 
manner, water may be dispensed from the heated water dispenser assembly 76 
simultaneously with the brewing process having little or no effect on the 
temperature of the brewing water. 
In use, the beverage brewing appliance 20 as shown in FIG. 3 produces a 
brewed beverage upon initiation of a brewing cycle. When a brewing cycle 
is initiated the controller 70 operates the control valve 58 over control 
line 71 to controllably admit a predetermined quantity of water from the 
pressurized feedline 60 to the first and second water sources 38, 40. The 
quantity of water is controlled by the controller 70 which includes a brew 
timer which begins the brew cycle after a start signal, or may incorporate 
a temperature sensor 90. The temperature sensor 90 is coupled to the 
feedline 60 and to the controller 70 over control line 92 to sense the 
temperature of the water passing through the feedline 60. Information 
regarding the temperature of the water passing through the feedline 60 is 
used by the controller 70 to control the regulator to 72 via control line 
74. The reservoir 62 as shown in FIG. 3 is the "pourover" type such that 
when water is introduced into the reservoir through the first feedline 64 
the water will displace water from the reservoir through the first 
delivery line 66 and into the brewing apparatus 36. When water is 
introduced into the reservoir 62, the water heater 40 will be activated in 
response to a temperature reading to heat the water in the reservoir. It 
should be noted, that the water heater 40 will also be activated in 
response to a drop in the temperature of the water in the reservoir 62 
when water is passed through the heat transfer section 86 thereby reducing 
the temperature of the water. 
Water which is displaced from the reservoir 62 is dispensed through the 
first delivery line 66 to the funnel 26. With reference to FIG. 5, the 
funnel 26 includes a primary chamber 94 which retains a filter 96 and a 
quantity of beverage brewing substance 98. A secondary chamber or passage 
100 is provided in the funnel 26 so as to bypass the primary chamber 94 
and the grounds which are infused by heated water. Heated water 44 
distributed from the sprayhead 56 over the beverage brewing substance 98 
is provided at a brewing temperature thereby providing sufficiently heated 
water to advantageously produced desired brewing effects. In this manner, 
only heated water passes through the beverage brewing substance. The 
brewed beverage 46 drains from the primary chamber 94 through the filter 
96 and through a foramenous surface 102 towards a bottom the of the 
primary chamber 94. 
Temperature reduction water 50 from the second water source 58 is combined 
with brewed beverage 46 in a mixing chamber 104 defined between an outlet 
106 of the funnel 26 and the intersection of the bypass section 100 with 
the outfeed from the foramenous structure 102. A brewed beverage 52 having 
a desired serving temperature is dispensed from the dispensing port 106 
into the receptacle 30 therebelow. The controller 70 controllably 
activates the warmer 32 over control line 108 to maintain the beverage 
retained in the receptacle 30 at a desired serving temperature. It would 
be undesirable to raise the temperature of the beverage retained in the 
receptacle 30 using the warmer and as such the warmer 32 generally 
maintains the beverage at a temperature equal to or somewhat less than the 
desired serving temperature. 
Having described the general features of the invention with reference to 
FIGS. 1 and 2, and the specifics of a first version as shown in FIG. 3, 
and with further reference to FIGS. 5 and 6, reference is now made to FIG. 
4 to further describe a second version of the present invention. 
Structures or elements which are the same in the second version as shown 
in FIG. 4 as the first version previously described are represented by the 
same reference numerals. Structures or components having generally 
equivalent functions will be described by the same reference numeral with 
the addition of an alphabetic suffix "a". 
With reference to FIG. 4, the first water source 38a includes the heated 
water reservoir 62a and a heater 40a. A first feedline 64a brings water to 
the reservoir 62a and a first delivery line 66a provides a path from the 
reservoir 62a to the beverage brewing apparatus 36. The water heater 40a 
maintains the water retained in the first reservoir 62a at a temperature 
of approximately 200.degree. F. +5.degree. F./-10.degree. F. In other 
words, the first reservoir 62a of the first water source 38a provides the 
brewing water at the brewing water temperature of approximately 
200.degree. in this second version of the invention. 
The second water source 48a as shown in FIG. 4 includes a second water 
reservoir 110 which maintains water therein at a predetermined temperature 
by means of a water heater 112 which has generally the same configuration 
as the heater 40a associated with the first reservoir 62a. A second 
feedline 114 is connected to the main feedline 60 to deliver water from 
the main feedline 60 to the second reservoir 110. The second delivery line 
68a provides a path from the second reservoir 110 to the bypass passage 
100 of the brewing funnel 26. A regulator 72a is attached to the second 
delivery line 68a in order to regulate the quantity of water which is 
dispensed from the second reservoir 110 to the bypass passage 100 of the 
brewing funnel 26. 
The heated water dispenser assembly 76a employed with the second version of 
the invention as shown in FIG. 4 includes the heated water line 84 which 
is coupled to the feedline 60 by way of the heat transfer section 86 and 
the reduced temperature line 82a which is coupled to the second water 
source 48a. A regulator 88a is connected to the reduced temperature line 
82a to meter the quantity of water which is fed through the reduced 
temperature line 82a to the faucet 34. 
In use, the second version of the invention, consistent with the general 
diagram as shown in FIG. 2, combines water from a first water source 38a 
and a second water source 48a to produce a beverage having desired 
characteristics and a serving temperature within a desired serving 
temperature range. The temperature sensor 90 as shown in FIG. 3 is absent 
from FIG. 4 since the temperature of the temperature reduction water from 
the second water source 48 will be a generally constant temperature having 
a generally known value. As such, the regulator 72a may be simplified in 
that the temperature sensor is not required. For a more accurate reading, 
however, the temperature sensor may be associated with the valve 72a and 
the controller 70 so as to more precisely meter the quantity of 
temperature reduction water to the brewing apparatus 36. 
In general, the serving temperature of the second version may be more 
precise or have a smaller deviation range since the temperature of the 
water from the second water source 48a is more consistent. The water 
retained in the second reservoir 110 is not subject to temperature 
fluctuations as may be the version shown in FIG. 3 as the result of the 
temperature of the water in the feedline 60 may range, for example, range 
from 40.degree. F.-85.degree. F., which introduces greater variability 
into the system. 
The heated water dispenser assembly 76a as shown in FIG. 4 is not a closed 
circuit system as discussed with regard to the first version of the 
invention. Water in the assembly 76a is drawn from the second reservoir 
110 through the reduced temperature line 82a. While FIG. 4 shows a 
preferred second version, yet a further variation of the invention 
connects the reduced temperature line 82a in the manner as shown in FIG. 3 
to provide a true closed loop system. In many circumstances, however, 
water may be drawn from the second reservoir since the temperature will 
generally be much lower than the temperature of the water in first 
reservoir 62. As such, it will take a shorter period of time to heat the 
water in the second reservoir 110 and therefore require a shorter cycle 
time to recover the temperature when water is drawn therefrom through the 
heated water dispenser 76a. The valve 88a meters a quantity of water 
through the reduced temperature line 82a. 
During a brewing cycle, once the brewing cycle is initiated, the valve 58 
meters a desired quantity of water from the pressurized feedline 60 to the 
first and second reservoirs 62a, 110. Water is introduced into the bottom 
of the reservoirs 62a, 110 so that the heated water which rises towards 
the top as a result of convection phenomena, will be displaced and 
dispensed through the first delivery line 66a and the second delivery line 
68a. The brewing cycle is generally the same as described hereinabove such 
that the valve 72a controllably regulates the quantity of water dispensed 
into the bypass passage 100 of the funnel 26. The difference in the 
version as shown in FIG. 4 is that the temperature of the water in the 
second reservoir 110 will be substantially closer to the temperature of 
the reservoir in the first reservoir 62a compared to the version as shown 
in FIG. 3 where the water used in the second water source 48 comes 
directly from the feedline 60, generally at room temperature or cooler. 
With reference to FIG. 3, the controller 70 includes a brew timer of known 
construction which begins a brew cycle after a start signal is received by 
the controller 70. The brew timer measures a period of time related to the 
quantity of beverage 52 to be brewed. The controller 70 then calculates 
the quantity of water which must be dispensed through both the first 
delivery line 66 and the second delivery line 68. The calculation operates 
the solenoid valve 58 over line 71 for a predetermined period of time. The 
controller 70 is preprogrammed to control the solenoid valve 58 to 
dispense only a required quantity of water. If a controllable solenoid 
valve 72 is employed on the second feedline 68, the controller may also lo 
control the solenoid valve 72 over line 74 to open a valve 72 simultaneous 
with the initiation of the brew cycle or at a predetermined time after the 
intiation of the brew cycle. In this manner, the temperature reduction 
water dispensed to the funnel 26 can be delivered simultaneous with the 
heated water or after a predetermined quantity of heated water to the 
grounds. A delay of dispensing temperature reduction water to the funnel 
26 may be employed to maintain a desired temperature in the brewing water. 
Additionally, the valve 72 can be adjusted to dispense a desired quantity 
of water depending on the temperature sensed by the temperature sensor 90 
of the water passing through the feedline 60. Generally, at the end of the 
cycle, the controller 70 controls the valve 58 over line 71 to prevent 
further dispensing water from the feedline 60. The controller operates the 
heater 40 over control line 116 to heat and maintain the water in the 
reservoir 62 at a desired temperature. 
With reference to FIG. 4, control valves 58, 72a and 118 can be operated to 
control the operation and flow of water through the brewing apparatus 36. 
In this regard, at the beginning of a brew cycle, the solenoid valve 58 
must be opened and thus controlled over line 71 by the controller 70 to 
allow water to flow from the feedline 60 to the first water source 38a and 
the second water source 48a. The controller 70 can control the valve 72a 
associated with the second water source 48a independent of the valve 118 
associated with the first water source 38a. As such, the temperature 
reduction water dispensed through the second line 68a may be delayed to 
allow the heated water delivered through the first line 66a to steep in 
the beverage brewing substance thereby producing the desired results. This 
delay may be desired so that the temperature reduction water does not 
reduce the temperature during the brewing process and does not have any 
effect on the characteristics on the beverage produced thereby. 
Alternatively, the valves 72a, 118 may be operated over control lines 74a, 
120 by the controller 70 generally simulatenously. The second version as 
shown in FIG. 4 provides a broad range of controllability to produce 
precise brewing characteristics and maintain these characteristics 
consistently over numerous batches of beverage. 
As may be evident from the preceding description, the present invention 
includes a novel method of brewing a beverage in a beverage brewing 
appliance to produce a beverage having a predetermined serving 
temperature. The method includes the steps of placing a quantity of 
brewing substance in the brewing device 36 and dispensing a quantity of 
brewing water (42) from the first water source 38. The water (42) is 
heated by a water heater 40 so that the water dispensed to the brewing 
apparatus is at a brewing temperature (44). The brewing water is used to 
infuse the beverage brewing substance to produced a desired brewed 
beverage. Before the brewed beverage is dispensed from the brewing 
apparatus, a quantity of temperature reduction water is dispensed into the 
brewed beverage for mixing the temperature reduction water and the brewed 
beverage to produce a final brewed beverage having a serving temperature 
within a predetermined temperature range. 
While preferred embodiments of the present invention have been shown and 
described, it is envisioned that those skilled in the art may devise 
various modifications and equivalents without departing from the spirit 
and scope of the appended claims. The invention is not intended to be 
limited by the foregoing disclosure.