Patent Publication Number: US-11383966-B1

Title: Fluid dispenser with anti-run-on

Description:
FIELD OF THE INVENTION 
     This application relates generally to fluid dispenser in a refrigerating appliance, a refrigerating appliance including a fluid dispenser, a method of dispensing a fluid, and a dispensing apparatus including a fluid dispenser. 
     BACKGROUND OF THE INVENTION 
     Conventional refrigeration appliances, such as domestic refrigerators, typically have both a fresh food compartment and a freezer compartment or section. Frequently, water, beverage, and/or ice dispensers are located on a fresh food compartment door or a freezer compartment door.  FIG. 1  illustrates a prior art French door bottom mount freezer style refrigerator  10 , having two French doors  16  enclosing a fresh food compartment, a sliding freezer door  12 , and an outer case  14 . Fluid and/or ice dispenser  18  may be located in a niche or inset  15  on a fresh food compartment door  16 , as shown in  FIG. 1 . Generally, a fluid container is placed in the niche or inset below a dispensing nozzle. Then, by depressing a paddle or a button the water or beverage is dispensed through a nozzle. Depending on the mechanism used to dispense the water or beverage, deactivation of dispensing may not be immediate and a small amount water or beverage may continue to flow after the fluid container is removed, such occurrence being referred to as “run-on.” Some niches or insets are equipped with a reservoir to collect such spilled water or beverage. It would be preferrable to have a dispensing system which automatically prevents any excess dispensing when the fluid container is removed or the paddle is released. 
     SUMMARY OF THE INVENTION 
     The instant invention is fluid dispenser for a refrigerator with an anti-run-on feature. 
     In a first embodiment, the invention provides a fluid dispenser for a refrigerator comprising a dispenser housing; a dispenser frame pivotally mounted within the dispenser housing, the dispenser frame comprising a front face and two side faces and a first gear disposed on one of the side faces; an actuator comprising a paddle and a lever, the paddle pivotally mounted to the dispenser housing, the lever interlocking with the dispenser frame such that when the paddle is pushed, the lever causes the dispenser frame to pivot forward; a flexible and compressible tube with a dispensing open end mounted to the dispenser frame; a fixed compression jaw mounted onto the dispenser housing above a pivot point of the paddle and behind the flexible and compressible tube; a movable compression jaw having a jaw end and a pivot end, the jaw end mounted in front of the flexible and compressible tube and opposite the fixed compression jaw, wherein the pivot end comprises a second gear, the second gear interlocking with the first gear, such that when the paddle is pushed the first gear rotates the second gear moving the movable jaw away from the flexible and compressible tube. 
     In another embodiment, the water dispenser further includes a spring positioned between the pivot end of the movable jaw and the dispenser frame such that the movable jaw is biased against the tube and toward the fixed jaw when the paddle is not pushed. 
     In an alternative embodiment, the invention provides a water dispenser wherein at least one of the fixed and movable jaws have a flat face facing the tube. 
     The invention further provides an embodiment of the water dispenser wherein at least one of the fixed and movable jaws have two protrusions facing the tube. 
     In yet another embodiment, each of the fixed and movable jaws of the water dispenser have a flat face facing the tube. In another embodiment, each of the fixed and movable jaws of the water dispenser have two protrusions facing the tube and wherein the fixed and movable jaws are positioned such that the protrusions on the fixed jaw face the protrusions on the movable jaw. 
     In an alternative embodiment, the invention provides the water dispenser wherein a portion of the tube above the fixed and movable jaws connects to a water supply line. In another embodiment, the water supply line connects to a water filter upstream of the flexible and compressible tube. 
     In yet another embodiment, the water dispenser is located on an outside surface of a refrigerator door. In an alternative embodiment, the water dispenser is located on an inside surface of a refrigerator door. Alternatively, the water dispenser is located within a fresh food compartment of the refrigerator. 
     The invention further provides the water dispenser according to any of the embodiments described herein, wherein a distance which the paddle is pushed by a user is proportional to a remaining force applied by the movable jaw onto the flexible tube. 
     The invention also provides a refrigerator comprising the water dispenser of any embodiment herein. 
     The invention further provides a method to prevent or minimize fluid leakage from a fluid dispenser comprising the steps of: providing the water dispenser of claim  1 ; connecting a portion of the tube above the fixed and movable jaws to a fluid supply line; depressing the paddle of the actuator causing the movable jaw to move away from the tube, thereby dispensing fluid; releasing the paddle of the actuator causing the spring to bias the movable jaw forward against the tube, thereby compressing the tube between the movable and fixed jaws. 
     In an alternative method, the fluid supply line provides water, filtered water, or a flavored beverage to the flexible and compressible tube. 
     The invention further provides the method of any embodiment herein, wherein the depressing the paddle occurs to a variable distance resulting in a variable force being applied by the movable jaw to the tube resulting in variable flow rates through the flexible tube. 
     The invention further includes a fluid dispensing apparatus comprising any embodiment of the fluid dispenser described herein. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       For the purpose of illustrating the invention, there is shown in the drawings a form that is presently preferred; it being understood, however, that this invention is not limited to the precise arrangements and instrumentalities and scale shown. 
         FIG. 1  is a front perspective view of a prior art household refrigeration appliance showing doors of the fresh food and freezer compartments in closed positions; 
         FIG. 2  is a side cross sectional view of a first embodiment of the fluid dispenser; 
         FIG. 3  is a side perspective partial cross-sectional view of the embodiment shown in  FIG. 2  wherein the fluid dispenser is shown in an open position; 
         FIG. 4  is a side perspective partial cross-sectional view of the embodiment shown in  FIG. 2  wherein the fluid dispenser is shown connected to a water supply line; and 
         FIG. 5  is a front elevational view of an embodiment of the fluid dispenser installed in a niche of a door. 
     
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION 
     Embodiments of a refrigerating appliance or a component thereof now will be described with reference to the accompanying drawings. Whenever possible, the same reference numerals are used throughout the drawings to refer to the same or like parts. 
     Referring first to  FIG. 2 , a side cross sectional view of a first embodiment of the fluid dispenser  20  is shown. In  FIG. 2 , the dispenser  20  is located in a niche or inset  22 . The fluid dispenser  20  includes a dispenser housing  24 , a dispenser frame  26  pivotally mounted within the dispenser housing  24 . The dispenser frame  26  Includes a front face  28  and two side faces  21  (only one shown in the cross-sectional view) and a first gear  23  disposed on one of the side faces  21 . The fluid dispenser  20  further includes an actuator  25  which in turn includes a paddle  27  and a lever  29 . The paddle  27  is pivotally mounted to the dispenser housing  24 . The lever  29  interlocks with the dispenser frame  26  such that when the paddle  27  is pushed, the lever  29  causes the dispenser frame  26  to pivot forward. 
     The fluid dispenser  20  further includes a flexible and compressible tube  30  with a dispensing open end  31  mounted to the dispenser frame  26 . A fixed compression jaw  32  is mounted onto the dispenser housing  24  above a pivot point  32  of the paddle  27  and behind the flexible and compressible tube  30 . A movable compression jaw  33  has a jaw end  34  and a pivot end  35 . The jaw end  34  of the movable compression jaw  33  is mounted in front of the flexible and compressible tube  30  and opposite the fixed compression jaw  32 . The pivot end  35  of the movable compression jaw  33  includes a second gear  36  which interlocks with the first gear  23 . 
     When the paddle  27  is pushed backward, the first gear  23  rotates the second gear  36  causing the movable compression jaw  33  to move away from the flexible and compressible tube  30 , as shown in  FIG. 3 .  FIG. 3  further illustrates a fluid container  46  in cross section pushing the paddle  27  backward. When the movable compression jaw  33  moves away from the flexible and compressible tube  30  and the fixed compression jaw  32 , fluid is allowed to flow through the flexible and compressible tube  30  in which a constant fluid pressure is maintained. In  FIG. 2 , the movable compression jaw  33  is held in a closed position in which the movable compression jaw  33  is biased against the flexible and compressible tube  30  and the fixed compression jaw  32  thereby preventing any fluid held in the tube  30  from flowing out of open end  31 . 
     As seen in  FIG. 2 , when paddle  27  is not pushed, spring  37  holds movable compression jaw  33  biased against the flexible and compressible tube  30 , thereby pinching tube  30  and preventing any fluid flow through tube  30 . Spring  37  is positioned between the pivot end  35  of the movable compression jaw  33  and the dispenser frame  26 . Spring  37  includes a coiled section  38  and a biasing arm  39 . 
     In the embodiment illustrated in the  FIGS. 2 and 3 , the fixed and movable jaws  32  and  33 , respectively, have protrusions  40  facing the tube  30 . In alternative embodiments, one or both of the fixed and movable jaws  32  and  33  may have a flat face facing the tube. Alternative profiles of the fixed and movable jaws  32  and  33  may be used provided such profiles are capable of pinching the tube  30  so as to restrict fluid flow through tube  30 . In yet another embodiment, the fixed and movable jaws have complementary shapes, such as an S-shape and a reverse S-shape, so that the contact area of pinching the flexible tube between the jaws is maximized. 
     As can be seen from the foregoing discussion and  FIGS. 2 and 3 , a variable force on paddle  27  can result in a variable compression of tube  30  by movable jaw  33 . Accordingly, the inventive fluid dispenser may dispense a fluid at a variable rate depending upon the amount of compression of tube  30 , 
       FIG. 4  illustrates the fluid dispenser  20  connected to a water supply line  41 . In the embodiment illustrated in  FIG. 4 , the flexible and compressible tube  30  is connected by connecting mechanism  42  to a more rigid water supply line  41 . Water supply line  41  may be made of the same material as the flexible and compressible tube  30 , or alternatively, of a more rigid plastic or polymer material, or of a metal material. As shown in  FIG. 4 , water supply line  41  supplies water which has been filtered through an in-line filter  43 . Water supply line  41  ultimately connects to a water supply  44  which may be a residence water supply, water bottle or other source. In an alternative embodiment, flexible and compressible tube  30  connects to an alternative fluid supply, such as a source of soda, juice or the like. It will be understood that the inventive fluid dispenser may be used in connection with dispensing any fluid but is particularly useful in connection with dispensing fluids typically dispensed from refrigerating appliance. Likewise, it will be understood that the inventive fluid dispenser may be used in a niche which includes other dispensers, such as ice dispensers. When used in conjunction with an ice or other dispenser, the inventive fluid dispenser may be disposed in solely a part of a niche or inset. 
     The invention further provides a refrigerator having the inventive fluid dispenser.  FIG. 5  illustrates the fluid dispenser  20  on the outside surface of a refrigerator door  50  and in a niche  52  located on the door. In  FIG. 5 , the dispensing frame  26  is covered by a decorative faceplate  54 . In alternative embodiments, the fluid dispenser may be located on an inside surface of a refrigerator door, or within a fresh food compartment, such as on or within a fresh food compartment liner. Moreover, any form of refrigerator may accommodate the inventive fluid dispenser. The inventive fluid dispenser may be used with, in or on a French door bottom mount refrigerator as shown in  FIG. 1 , or alternatively, with top freezer mount refrigerators, side by side refrigerators, multi-door refrigerators, mini or compact refrigerators, or independent refrigerating units. 
     The invention further provides a method to prevent or minimize fluid leakage from a fluid dispenser which includes the steps of providing the fluid dispenser as described herein, connecting a portion of the tube above the fixed and movable jaws to a fluid supply line; depressing the paddle of the actuator causing the movable jaw to move away from the tube, thereby dispensing fluid; releasing the paddle of the actuator causing the spring to bias the movable jaw forward against the tube, thereby compressing the tube between the movable and fixed jaws. In a particular embodiment of the inventive method, the fluid supply line provides water to the flexible and compressible tube. The fluid supply line may provide filtered water, or alternatively, a flavored beverage to the flexible and compressible tube. 
     In another embodiment of the invention, the depressing the paddle occurs to a variable distance resulting in a variable force being applied by the movable jaw to the tube resulting in variable flow rates through the flexible tube. 
     In another embodiment, the invention provides a fluid dispensing apparatus comprising the fluid dispenser as described herein. Such fluid dispensing apparatus could be, for example, a countertop fluid dispenser or a floor mounted fluid dispenser. In alternative embodiments, the fluid dispensing apparatus may dispense by way of example, water, juice, milk, flavored beverages, such as sodas, or teas. In yet another alternative embodiment, the fluid dispensing apparatus may include a heating unit to dispense hot fluids, such as coffee, hot teas, hot chocolate milk, or the like.