WO2011115925A1

WO2011115925A1 - Single cup brewer

Info

Publication number: WO2011115925A1
Application number: PCT/US2011/028395
Authority: WO
Inventors: Charles H. Clark; Suresh Radhakrishnan
Original assignee: Bunn-O-Matic Corporation
Priority date: 2010-03-13
Filing date: 2011-03-14
Publication date: 2011-09-22
Also published as: US9161658B2; US20130004629A1

Abstract

A beverage making apparatus including a housing containing a water system. The water system includes a heated water reservoir and a pour-in basin for receiving water. The pour-in basin is connected to a water pump which pumps water from the basin to the heated water reservoir. Water from the heated water reservoir is moved to a spray head for dispensing to a beverage brewing substance retained in either at least one of a pod format or a cartridge format. A pair of conductance probes are contained in the fill basin to indicate the status of water in the fill basin. The brewer is designed for use with multiple beverage making substance holders so that multiple beverage substance formats can be used with the brewer.

Description

SINGLE CUP BREWER

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit of priority under 35 U.S.C. § 119(e) to U.S. Provisional Application No. 61/313,737, filed March 13, 2010. The disclosure set forth in the referenced application is incorporated herein by reference in its entirety, including all information as originally submitted to the United States Patent and Trademark Office.

BACKGROUND

[0002] Beverage making apparatus has been produced which include a reservoir for holding a portion of heated water. The reservoir includes an inlet into the reservoir and an outlet from the reservoir and a heating element in association with the reservoir. Water is supplied to the reservoir, heated, and then moved to a spray head for dispensing over a beverage making substance. Heated water dispensed over the beverage making substance infuses the substance and produces a beverage.

[0003] The exemplification set out herein illustrates embodiments of the disclosure that are not to be construed as limiting the scope of the disclosure in any manner. Additional features of the present disclosure will become apparent to those skilled in the art upon consideration of the following detailed description of illustrative embodiments exemplifying at least the best mode of carrying out the disclosure as presently perceived.

BRIEF DESCRIPTION OF THE DRAWINGS

[0004] Figure 1 is a perspective view of a single cup brewer which includes a housing have a body extending from a base and a hood extending from the body, a brewing substance holder is provided and removably attachable to an engagement area of the hood, a cover is provided over a portion of the hood which receives water therein for use in the beverage making process; [0005] Figure 2 is a perspective view of the brewer in which the holder has been removed from the engagement area to reveal a cavity for receipt of a brewing substance, the cover has been displaced from the holder to reveal a filling area, a drip tray area has been removed to reveal a collection area;

[0006] Figure 3 is a rear perspective view which has been partially fragmented to reveal various components within the body of the housing including the heated water reservoir, fill basin, controller, air pump, water pump, and related structures;

[0007] Figure 4 is an illustrative general schematic diagram showing the overall brewing system of the brewer;

[0008] Figure 5 is a drawing showing the relationship of the exploded illustrations of Figures 5A, 5B, and 5C;

[0009] Figure 5A is an enlarged exploded view of a portion of the brewer including the pour-in basin, spray head, control switch assembly and holder assembly shown in an exploded view relative to other views as shown in Figures 5b and Figure 5c;

[0010] Figure 5B shows an exploded view of a water moving assembly including a water pump, heated water reservoir, air pump and vent valve which operate to move water and air through the brewer during operation;

[0011] Figure 5C is an exploded view of the brewer housing which has been exploded to reveal other components contained therein, Figures 5A, 5B and 5C providing a combined exploded view of the entire brewer assembly;

[0012] Figure 6 is a perspective view of a holder which is used for holding a prepackaged filter cartridge cup containing brewing substance with a cover displaceably attached to a corresponding holder defining a cavity for receiving the cartridge;

[0013] Figure 7 shows a partial fragmentary side elevational view of a holder with a cartridge (not in cross section) placed therein and shows the first of a series of progressions in which the cartridge is engaged in the holder for use during a brewing process; [0014] Figure 8 shows the view of Figure 7 in which a cover has been advanced to a position over the top surface of the cartridge (not in cross section) and in which the surfaces of the cartridge have not been pierced by multiple cannulae retained on the cover and in the cavity of the holder;

[0015] Figure 9 is a view of the illustrations of Figures 7 and 8 in which the cover has been positioned over the cartridge with the multiple cannulae piercing corresponding surfaces of the cartridge for delivering water to a brewing substance retained in the filter portion of the cartridge, and the holder having a compatible engagement structure for retention on the engagement area of the hood;

[0016] Figure 10 is a side elevational cross-sectional view of the brewer with the prepackaged beverage brewing cartridge retained in the holder for use in the brewing process;

[0017] Figure 11 is an enlarged cross-sectional view as shown in Figure 10 showing the holder position below and mating with a spray head for delivering water to the holder system, the spray head is the same spray head that us used for distributing water over a pod retained in a pod holed configured for attachment to the same brewer; and

[0018] Figure 12 is an enlarged cross-sectional view of the holder.

DETAILED DESCRIPTION

[0019] While the present disclosure 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 disclosure and is not intended to be exhaustive or to limit the disclosure to the details of construction and the arrangements of components set forth in the following description or illustrated in the drawings.

[0020] As shown in Figure 1, a brewer 20 includes a housing 24 having a body 28 extending above a base 30. A hood 34 extends from the body 28 over a portion of the base 30. A beverage substance holder or holder 36 is retained underneath a portion of the hood 34. The base 30 includes a drip tray 40 on top of which a cup or container 44 may be placed. The container 44 is position underneath the beverage substance holder 36 so that when the brewer 20 operates a brewing cycle a volume of beverage is dispensed from the holder 36 into the cup there below.

[0021] In Figure 2, the holder 36 has been removed from the hood. A handle 48 attached to the holder 36 used to grip the holder for removal from and attachment to the brewer. An engagement assembly 50 includes rails 54 on the holder 36 and corresponding engagement ribs 58 on an engagement area 60 of the hood 34.

[0022] In the exploded view of Figure 2, the holder 36 reveals a cavity 64 which is positioned in the holder for retaining a beverage brewing substance. The substance may be retained in a pre-packaged manufactured "pod". Pods are manufactured of a filter material which allows water to flow there through. When packaged with brewing substance between layers of filter material, a pod can be used to brew a selected beverage.

[0023] As shown in Figures 1 and 2, a cover 70 is provided on the hood. Figure 2 shows the hood in which the cover 70 has been displaced. The cover 70 is designed to swivel or tilt relative to the hood. As shown in Figure 2, the cover 70 has been rotated to reveal a filling opening 74 or mouth. Water used in the brewing process is poured through the mouth into a basin below a filling grill 76. With reference to Figure 10, water 80 is poured through the opening 74 once the cover is removed there from. Water flows into a fill basin 82. The water collects in the fill basin 82 first filling a lower portion of reservoir 84.

[0024] As the water fills the basin 82 it reaches a level which can be measured by the measuring features 86. The measuring features 86 are a series of defined horizontal levels associated with selected volumes of water in the basin. This allows a user to look through the mouth 74 and grating 76 to determine the various measurements on the measuring features 86. This allows a user who has not selected a pre-measured amount of water to pour into the basin to use the measuring features as a guide. In other words, the upper feature may indicate 14 ounces of water whereas a lower feature may indicate 6 ounces of water with the other features in between providing additional measuring indicia. [0025] The lower basin or area 84 is provided so that water poured into the basin 82 will continue to drain to the lowest area 84. Water flows from the lower basin 84 through a tube 90 to a water pump 92. The water pump pumps the water to the heated tank 94. Water is discharged from the pump 92 into the tank 94 in a lower area which includes a heating element 100. Water fills the cavity of the tank 94. Continued pumping of the water pump 92 pushes water out through the top 102 which connects to a spray head 106. Water is pumped by the pump 92 into the tank 94 until there is an indication that basin 82 is substantially drained. As water is pumped by the pump 92 through the tank 94 it displaces water already in the tank so that water can be provided on demand. In other words, heated water is retained in the tank 94 and is displaced upon activation of a pump. This helps to reduce the time a user has to wait for the heated water to be dispensed by a spray head.

[0026] With further references to Figures 4 and 5A and 5B, conductance probes 110 are positioned in the reservoir for detecting the presence, absence and/or level of water in the lower basin 84. It should be noted that while a pair of conductance probe 110 is illustrated, a variety of other sensing devices may be used.

[0027] With reference to Figure 4, operation of the brewer includes pouring water into the fill-in basin 82 and movement of the water by the water pump 92 to the tank 94. Heated water is displaced from the tank 94 and dispensed though the water line 112 to a spray head 106 positioned above the holder 36. Water is dispensed into a pod or other making substance container retained in the holder for producing a brewed beverage which is dispensed from the nozzle 114 of the holder to the container 44 there below. At the end of the brewing cycle an air pump 120 is activated to expel at least some of the moisture retained in the holder at the end of the brewing cycle.

[0028] The diagrammatic system illustration of Fig. 4 shows that the conductance probes 110 are connected to a controller 124. The controller 124 is also coupled to the air pump 120, water pump 92, to valve 128, and heating element 100 associated with heated water tank 94. A sensor assembly 130 is associated with the holder 36. The sensor assembly 130 is coupled to the controller 124 to prevent operation of the brewer unless a predetermined condition is detected by the sensor assembly. The sensor assembly is associated with the handle 48. The handle includes a locking assembly 132, shown in greater detail in Figure 12. The locking assembly 132 includes a locking button 134 which is spring loaded into a locked position with a spring 136. The locking button 134 engages a corresponding portion of the hood 140 or locking hasp. Engagement of the button 134 with the hasp 140 will result in operation of the sensing assembly 130. If the engagement assembly 50 is properly engaged with the rails 54 engaging the ribs 58, the holder 36 will be positioned for operation of the brewer. The positioning condition will be detected by the sensor which will provide a signal to the controller 124. When the controller 124 senses a signal the brewer will be operable.

[0029] During the brewing cycle, the volume of water to be used for brewing is poured into the basin 82. Once the user activates a brewing switch 150 coupled to the controller 124, the system will check for positioning of the holder 36 as detected by the sensor assembly 130. If the sensor assembly 130 provides a predetermined signal, water pump 92 will be activated. The pump will initiate a pumping cycle to deliver water to the tank 94. The heater 100 will also be activated to heat incoming water. Since the heated water tank 94 retains a volume of heated water, the introduction by the water pump 92 of additional water will displace heated water from the reservoir through the water line 112 to the spray head 106.

[0030] The water pump 92 will continue to operate for a period of time as controlled by the controller 124. The pump 92 will stop operating when the controller provides a signal indicating that water in the pouring basin has reached a predetermined level. The

predetermined level is sensed the conductance probes. When the conductance probes 110 are submerged in the basin 82 there will be a signal indicating the presence of water in the basin. When the water level in the basin 82 drops below the conductance probes 110, the pump 92 will operate for a predetermined period of time beyond the signal. This will help to assure the water in the basin will be drained from the basin. Alternatively, the pump 92 can continue to operate only while the conductance probes are submerged. In other words, once there is no water bridging the space between the conductance probes, the pump may be stopped. This may allow some residual portion of water to remain in the basin to provide priming water on the next dispensing cycle.

[0031] As shown, a pair of conductance probes 110 are used in the fill basin 82 of the brewer 20. The probes 110 are generally horizontally spaced in the pour-in bowl. They are spaced generally close to each other but far enough apart to prevent unintentional bridging of water there between. In other words, if the probes are too close, water may bridge even though the overall volume of the water in the basin 82 is dropped below the conductance probes. By spacing the probes 110 horizontally, an indication of a water level in the basin can be provided. By positioning the probes 110 in the lower portion of the reservoir in the lower basin 84, an indication of the end of cycle water condition can be provided. The conductance probes 110 operate by providing an electric signal there between. Water in the basin bridges the two probes thereby completing the circuit. When the water drops below the probes the circuit is opened and the low water condition is detected.

[0032] With reference to Figures 6-11, an alternate embodiment of the holder 36a, a cartridge holder 36a, which is removable from the brewer, is shown. The holder 36a is completely compatible with the brewer so that a user may choose whether to use pods or cartridges. If the user has a favorite type of coffee packaged in a cartridge form he can use this brewer to brew the coffee. If the same user or another user of the machine has a favorite type of tea packaged in a pod, he can use this brewer by merely using a different holder. This allows the brewer to be used by several different users, in a home or office setting, and multiple brewing container formats.

[0033] As shown in Figure 6, the cartridge holder 36a includes a cavity 64a for receipt of a pre-packaged beverage cartridge cup 160. A cover 162 is provided and attached to the holder 36a with a hinge 164. As shown in these figures, rails 54 are provided on the cover 162. When the cover is positioned over the holder 36a the assembly can be positioned upon the engaging ribs 58 of the brewer 20 shown in the preceding figures.

[0034] The holder 36a includes a drain cannula 170. The cover 162 includes at least one water inlet cannula 172 and may include a group of multiple cannulae. As shown in the progressions in Figures 7, 8 and 9 the cartridge 160, having a generally known construction, is positioned in the holder 36a. When positioning the cartridge in the holder the base of the cartridge 176 will be positioned above the tip of the corresponding drain cannula 170. In other words, the bottom surface of the cartridge is not yet pierced. The drain cannula 170 may be provided with a larger diameter than the water inlet cannula 172. Also, the body 178 of the cartridge is formed of a more rigid plastic material compared to the cover 180 of the cartridge which is generally formed of a lower tear resistance plastic, foil or multilayer food packaging material. With reference to Figure 8, the cover 162 is positioned over the cartridge 160. In the transition from Figure 8 to Figure 9, the cannulae 172 and 170 will either puncture the top 180 and bottom 176 simultaneously or the top cannulae 172 will puncture the top 180 before the drain cannula 170 punctures the bottom 176.

[0035] Figures 9 - 12 show the final condition of the cartridge 160 positioned in the holder 36a and punctured for brewing. A pliable sealing material or structure 151 is provided surrounding the upper cannulael72 to provide some degree of interface to reduce leakage or seepage of water dispensed into the cartridge though the upper cannulae 172. Similarly, the pliable material or structure 153 is provided proximate the lower cannula 170 to provide some degree of interface to reduce leakage or seepage of beverage dispensed from the cartridge though the lower cannula 170.

[0036] As shown in Figure 12, the locking button 132 provides a function of retaining the cover on the holder and engagement of the holder on the engaging rib 58. An upstanding finger 190 of the button is used to engage the hasp 140 of the brewer. The leading edge 192 of this finger helps to retain the cover 162. The cover is not sealed to the holder, and is merely positioned over the mouth of the holder as shown in Figure 12. Also, the rim of the cartridge is not captured between the cover and the holder. A hook 200 holds the cover over the holder. The button 132 is spring loaded by the spring 202. The finger 190 engages the hasp. Operation of the button 132 to remove the holder from the brewer can also be used, with a separate action, to release the cover by disengaging the hook 200 from the cover.

[0037] Figures 10 and 11 show the holder 36 retained on the brewer 20 for brewing. In this position, a collection area 194 of the cover 162 communicates with the spray head. In this regard, the spray head is designed to distribute water over a pod as used in the holder 36 as shown in Figures 1-5C. The collection area 194 allows the water distributed by the spray head to be collected and directed through the corresponding multiple water inlet cannulae 172.

[0038] The multiple cannulae facilitate distribution of water into the cartridge and agitation of substance retained in the cartridge. The multiple cannulae may be generally evenly spaced relative to only another and the group of multiple cannulae are spaced inwardly away from the outer edge of the cartridge. This is because the cartridge may be fabricated with a filter material inside the cartridge which retains the beverage making substance. Water is then dispensed through the top 180 for mixing with the beverage brewing substance 143 in the filter material 145. Beverage drained from the beverage making substance through the filter material and collects in the lower portion of the body 178 of the cartridge and drains through the drain cannula 170. In other words, the spray head can be used for brewing beverages using both a pod retained in the holder 36 and a cartridge retained in the cartridge holder 36a. This provides a brewer which can be used with multiple beverage substance holding formats.

[0039] It should be noted that the present disclosure may refer to coffee in reference to beverage making substance throughout the description in the interest of clarity and simplicity. It will be understood, however, that any form of beverage making substance may be used to produce a beverage and the term coffee or beverage making substance is intended to be broadly interpreted. This broad interpretation is also intended to include, but is not limited to, beverage substances including but not limited to, coffee, tea, herbs, botanicals, liquid beverage concentrate, ground, pulverized, rough cut, whole, powdered beverage concentrate, flaked, granular, freeze dried or other forms of materials including, but not limited to, liquid, gel, crystal or obtain a beverage or other food product or any other forms of beverage substance or food products.

[0040] Terms including beverage, brewed, brewing, brewing substance, brewed liquid, and brewed beverage as may be used herein are intended to be broadly defined as including, but not limited to, the brewing of coffee, tea, and any other beverages. This broad

interpretation is also intended to include, but is not limited to, any process of dispensing, infusing, steeping, reconstituting, diluting, dissolving, saturating or passing a liquid through or otherwise mixing or combining a beverage substance with a liquid such as water without limitation to the temperature of such liquid unless specified. While a heated liquid is referred to herein it should be understood that reference to temperature is provided by way of illustration and not limitation and should be broadly interpreted. It should be understood that a beverage may be made to accommodate a recipe using heated, unheated, chilled or liquid within any range of temperature. Also, the volume or quantity of the beverage making substance used in the system or the beverage produced by the system is intended to be broadly interpreted and not limited to that as specifically disclosed and includes serving sizes ranging from single cup to multiple cup containers. [0041] While this disclosure has been described as having exemplary embodiments, this application is intended to cover any variations, uses, or adaptations using its general principles. It is envisioned that those skilled in the art may devise various modifications and equivalents without departing from the spirit and scope of the disclosure as recited in the following claims. Further, this application is intended to cover such departures from the present disclosure as come within the known or customary practice within the art to which it pertains.

Claims

1. A beverage brewer including a heated water reservoir, a water pump and a fill basin, the fill basin includes a pair of conductance probes contained therein in a generally horizontal orientation, the probes being spaced apart in the fill basin; a controller associated with the brewer and coupled to the conductance probes to detect a condition of water in the basin.

2. A beverage brewer which includes a water dispensing system and a pair of holders for retaining at least two different beverage substance retaining formats, the holders being compatible for attachment to the brewer in receipt of water from the brewer for producing a beverage there from.

3. A method which includes a heated water reservoir, a water pump, a spray head, and pour- in basin, the water pump communicating with the pour in basin and the heated water reservoir, the heated water reservoir communicating with the spray head, and a holder positionable on the brewer for retaining a beverage making substance, the method including the steps of:

placing water in the pour-in basin;

operating the pump to move water from the pour-in basin to the heated water reservoir;

displacing water from the heated water reservoir to the spray head;

detecting the condition of water in the pour-in basin using a pair of spaced apart conductance;

stopping operation of the pump at a pre-determined time in response to a condition detected by the probes in the pour-in basin.