Abstract:
A beverage dispenser as provided for use with a container having an adapter with a resealable valve, which is a ball valve, has a valve which includes an engaging mechanism, such as a pin, for mechanically opening the valve in the adapter. The dispenser valve has a handle for rotatable motion, causing the pin to vertically move in contact with the ball valve, thus opening the container so that its contents flow. The valve may also be provided with a rinse water conduit and an opening so that the user can selectively close the adapter valve and rinse the dispenser system. The pin is preferably mounted to an x-shaped support.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation-in-part of Ser. No. 08/309,043, filed Sep. 20, 1994, now abandoned which is a continuation of Ser. No. 08/060,604, now U.S. Pat. No. 5,348,192. 
    
    
     FIELD OF THE INVENTION 
     This invention relates to a valve for use in a beverage dispensing device. 
     BACKGROUND OF THE INVENTION 
     Concentrated juices, such as orange juice or lemonade, may be shipped frozen in a plastic container which is disposable or refillable. One type of container which is used to ship concentrated juice has a threaded opening onto which an adapter with a ball valve is screwed. The adapter has a threaded portion at one end, and a reduced diameter cylindrical portion with a spring mounted ball valve at the end opposite the threaded portion. 
     A dispenser concentrate control valve for a bag-in-box type of container is available from Jet Spray Corp. of Norwood, Mass., and is described in U.S. Pat. Nos. 4,856,676 and 5,000,348, each of which are assigned to the same assignee as the present invention, and each of which are expressly incorporated by reference. 
     To install this general type of valve with a container, a cap is unscrewed and discarded. The valve has a threaded portion or a threaded adapter which can be screwed onto the threaded opening of the container. With the adapter and ball valve arrangement, the adapter would be discarded, and the valve screwed on with its own adapter. 
     A drawback of this arrangement is that a user, such as an employee in a restaurant or diner, must remove the adapter and add the dispenser valve each time a new container is used. Many restaurants have a fast-paced environment so restaurant managers do not want to expend any extra time and effort replacing food items. 
     Another arrangement that has been used with a ball valve includes a stationary pin which contacts the ball valve when the container is inserted. With this arrangement, it is cumbersome to rinse the system since the flow of juice cannot be stopped unless the container is removed. This, too, is cumbersome and undesirable in the fast-paced food service environment. 
     SUMMARY OF THE INVENTION 
     The invention features a beverage dispenser for use with a container for holding a concentrated beverage. The container has an adapter which is resealably actuatable between an open position for allowing the beverage to flow from the container and a closed position for containing the beverage. The dispenser has a housing with a chamber for holding a container in a fixed position, and a dispenser valve which includes an engaging mechanism for engaging the adapter, and a manually actuatable switch operable between a first position in which the engaging means causes the adapter to be in an open position and a second position in which the adapter is maintained in a closed position. The concentrated beverage is then combined with water. 
     In preferred embodiments, the adapter has a spring loaded ball valve, and the engaging mechanism includes a pin. In the dispenser, the switch is a rotatable switch for causing the pin to move vertically. The dispenser also comprises a conduit for providing rinse water into the dispenser valve through an opening in the valve. The opening is aligned with the conduit when the adapter is in the closed position, and is out of alignment with the conduit when the adapter is in an open position. 
     In another aspect, the invention features a beverage dispenser for use with a concentrated juice container which has an adapter with a ball valve at the bottom of the container. The dispenser has a housing with a chamber for holding a container in a stationary position when the container is inserted. A dispenser valve is mounted in the housing and has a pin which is vertically actuatable to a first position in which the pin is spaced from the ball valve so that the juice is contained, and a second position in which the pin engages the ball valve to allow the concentrated juice to flow from the container. A switch is provided for moving the pin between the first and second positions. A conduit provides water from a water supply; and the water and the concentrated juice are combined. A tap provides the combined water and concentrated juice to a user. 
     In preferred embodiments, the dispenser further comprises a second conduit for providing rinse water to the dispenser valve. The dispenser valve has a movable portion with an opening for receiving water from the second conduit when the opening is aligned with the conduit. This occurs when the pin is in the first position. The dispenser valve has a stationary outer sleeve with grooves and a rotatable inner sleeve with radial pins which mate with the grooves when the inner sleeve is inserted in the outer sleeve. The inner sleeve has a radially extending handle. The chamber in the dispenser can holds a plurality of containers, in which case the dispenser has an equal plurality of dispenser valves. 
     In another embodiment, the dispenser further comprises a removable cleaning plug to allow cleaning of the dispenser valve. The cleaning plug includes a handle to allow the plug to be easily removed from the dispenser valve. 
     In yet another embodiment, the pin is cylindrical and is supported by an x-shaped support member. The pin and the support member are integrally formed with the dispenser valve. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     Other features and advantages will become apparent from the following description of preferred embodiments and from the claims when read in conjunction with the drawings in which: 
     FIG. 1 is a perspective view of a beverage dispenser according to the present invention; 
     FIG. 2 is a perspective view of a container and adapter; 
     FIG. 3 is a partial cross-sectional view taken through the line 3--3 in FIG. 1; 
     FIGS. 4 and 5 are partial cross-sectional views of a dispenser valve according to the present invention in rinse and run positions, respectively; 
     FIG. 6 is an exploded perspective view of the dispenser valve; 
     FIGS. 7 and 9 are side views of a dispenser valve in rinse and run positions, respectively; 
     FIGS. 8 and 10 are cross-sectional views through the lines 8 and 10 in FIGS. 7 and 9, respectively; and 
     FIG. 11 is a cross sectional view of an alternative embodiment of a dispenser valve; 
     FIG. 12 is a cross sectional view taken along section lines 12--12 of FIG. 11; and 
     FIG. 13 is a partially broken away perspective view of a dispenser valve according to an alternative embodiment of the present invention. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Referring to FIG. 1, a beverage dispenser 10 has a refrigerated chamber 12 for holding one or more beverage containers 14. The containers are placed on a horizontal shelf 18 in the chamber through a hinged front door 16. The shelf has slots 19 positioned to correspond to where an adapter 20 extends vertically downward. 
     Referring to FIG. 2, container 14 has a threaded opening 28 in the bottom surface 30 (the container is shown upside down). Adapter 20 has a threaded portion at one end which screws over opening 28. At the other end 32 is a ball valve which keeps the liquid in the container. 
     Referring again to FIG. 1, adapter 20 mates with a concentrate control dispenser valve 22 which can be resealably opened or closed to allow a liquid in the container to flow. The concentrate is then mixed with water before being provided to a tap 24. To get juice from the dispenser, a user presses a glass against a switch 26 which causes the tap 24 to dispense combined water and concentrated juice. As an alternative to switch 26, a measured portion can be obtained by pushing a button (not shown). 
     Referring to FIG. 3, adapter 20 has a threaded portion 34 and a reduced diameter portion 36. At the shoulder between these two portions, a lip 38 extends into the interior of the adapter. Near the bottom of the adapter, a ball 40 is seated in an opening 42. A spring 44 is mounted between the ball and the lip, and keeps the ball pressed against the opening to seal the concentrated juice 46 in the container. An O-ring 47 is provided near the bottom to help seal the adapter when it is inserted in the valve 22. 
     The adapter is shown positioned over dispenser valve 22. Valve 22 has an engaging pin 48 which is mounted in a rotatable, cup-shaped, inner sleeve 50. The inner sleeve is mounted in a stationary outer sleeve 52, and is sealed by three O-rings 54. The inner sleeve has a radially extending handle 56 which is moved circumferentially to rotate the inner sleeve and the engaging pin relative to the outer sleeve. 
     Referring to FIGS. 4 and 5, the dispensing valve is shown in rinse position and run position, respectively. When the dispensing valve is in the rinse position (FIG. 4), the adapter extends into the inner sleeve, but the engaging pin and the ball are spaced apart by a small distance. If a user desires to rinse the dispensing valve, rinse water can be provided by a rinse water conduit 72 through a rinse inlet opening 110 in the inner sleeve 50 between the top two O-rings 54 to flow through the dispensing valve, without being combined with juice 46. 
     Referring to FIG. 5, when the dispensing valve is in the run position, the inner sleeve is rotated by an actuating handle (not shown) which causes the inner sleeve and the engaging pin to rotate upward. As a result, the engaging pin pushes the ball away from the opening and compresses the spring. Pushing the ball allows juice to flow from the container into valve 22. At the same time, the rinse inlet opening 110 in the inner sleeve is moved out of alignment with rinse water conduit 72, so rinse water does not enter the valve. The rinse conduit is now positioned between the bottom two O-rings. 
     The concentrate is pumped by a pump 100. The pump, as described in U.S. Pat. Nos. 4,856,676 and 4,610,145 preferably has a pump head with an eccentric pump chamber connected to inlet 102. An impeller (not shown) has flexible, rotating names mounted in pump 100. The concentrated liquid is combined with water from a water line 74, through a solenoid valve 76, and is then provided to tap 24. 
     Referring to FIGS. 3-5, an out-of-juice sensor is provided for detecting when the concentrated juice is low. A sensor, such as that shown in the present application, is described in U.S. Pat. No. 4,856,676 and 4,645,095, each of which are assigned to the assignee of the present invention and are incorporated by reference. Sensor 90 includes a first electrode 92 and a second electrode 94 which is grounded to the shelf 18 through a contact 96. Under normal running operation (FIG. 5), the concentrate contacts both electrodes. Circuitry (not shown) detects a change in impedance when the juice is not in a channel 98 between the electrodes. The circuitry senses the change and provides a visual indication of the change. 
     Referring to FIG. 6, an exploded view of the adapter and dispenser valve shows more detail. The inner sleeve of the dispenser valve has an inner cylindrical portion 80 and an overhanging portion 82. Two radial pins 84 extend from portion 82 toward portion 80. The outer sleeve has two upwardly slanting circumferential grooves 86, and two vertical grooves 88 extending from the top surface 91 to the middle of grooves 86. When assembled, the inner sleeve is placed over the outer sleeve so that pins 84 are aligned with vertical grooves 88. The inner sleeve is lowered and rotated so that the pins mate with grooves 86. When the handle is rotated, it causes the inner sleeve with the engaging pin to move relative to the outer sleeve as the pins move up or down in the grooves 86. Since the outer sleeve is held in a fixed position, the engaging pin is moved vertically to be in and out of contact with the ball valve without moving either the container or the outer sleeve. 
     Referring to FIGS. 7 and 8, groove 86 has a ramp portion 90 and a level portion 92. The ramp portion 90 comprises a sector of about 80°, and level portion 89 is about a 10° sector. Accordingly, the handle has a total range of movement of about 90° The level portion at the top of the groove helps to prevent the handle from rotating downward due to gravity or vibrations from the dispenser. 
     An alternative embodiment is shown in FIGS. 11-13. A dispenser valve 120 has an inner sleeve 122 rotatably disposed in a stationary outer sleeve 126. The sleeves are sealed with a plurality of O-rings 128. A handle 124 is connected to the inner sleeve for rotating it. 
     The valve 120 receives an adapter 130, which has a ball 132 biased with a coil spring 134. The spring extends downward from a lip 136 and biases the ball against an adapter opening 137 to seal the concentrated juice in the container as shown in FIG. 4. An O-ring 138 is provided near the bottom of the adapter to seal the adapter when it is inserted into the valve 120. 
     The valve has a cylindrical engaging pin 140, which extends vertically and perpendicular to an x-shaped support member 142 having a hub and four identical spokes 143. The pin and the support member are integrally formed with the inner sleeve 122. The pin is at the hub of the support member while the spokes are formed so that the support is mounted intermediate adjacent O-rings and the spokes are thinner than the distance between the O-rings. 
     Referring to FIG. 13, an exploded view of the dispenser valve shows more detail. The inner sleeve 122 of the dispenser valve has an inner cylindrical portion 180 and an overhanging portion 182. Two radial pins 184 extend from the overhanging portion toward the inner cylindrical portion. An outer wall 127 of the outer sleeve 126 has raised walls 185 forming two sets of tracks 187. Each set of tracks contains one upwardly slanting track 186, and one vertical track 188 extending from the top surface 191 of the outer sleeve 126 to the middle of track 186. When assembled, the inner sleeve is placed over the outer sleeve so that pins 184 are aligned with vertical tracks 188. The inner sleeve is lowered and rotated so that the pins mate with tracks 186. When the handle is rotated, it causes the inner sleeve with the engaging pins to move relative to the outer sleeve as the pins move up or down in the tracks 186. The tracks, and the radial pins function in a manner similar to that described for the radial pins and the grooves for the embodiment of FIGS. 3-10. In the embodiment shown in FIG. 13 the wall thickness of the outer sleeve 126 can be reduced since the tracks are formed from raised walls extending out from the outer surface 127 rather than from grooves formed within the outer sleeve as shown in FIG. 6. 
     Valve 120 operates in a manner similar to that described for the embodiment of FIGS. 3-10. When the inner sleeve 122 is rotated in a first direction, engaging pin 140 rotates and moves upward pushing ball 132 away from opening 137 and compressing spring 136, thus allowing juice to flow from the container into valve 120. When the inner sleeve is rotated in the opposite direction, the engaging pin rotates and moves downward so that the engaging pin and the ball are spaced apart by a small distance. In this position, the ball rests against the opening 137 and seals the juice in the container. 
     The valve includes a removable cleaning plug 144 inserted in an opening 148 of outer sleeve 126. An O-ring 146 seals an interface between the cleaning plug and the outer sleeve. The cleaning plug has a handle portion 150 for grasping the cleaning plug to remove it from the outer sleeve as shown in FIG. 13. With the cleaning plug removed, a brush or some other cleaning instrument may be inserted through opening 148 to clean valve 120. Also, water or a cleaning solution may be injected through the opening to assist in cleaning the valve. 
     Having described preferred embodiments of the present invention, it will become apparent to those skilled in the art that other modifications can be made without departing from the scope of the appended claims. For example, the chamber can hold one container or many, and have corresponding pumps, sensors, and taps. Also other embodiments of the dispenser can be used, for example, different types of pumps, microproccessor control, and other features.