Patent Publication Number: US-6668873-B1

Title: Tamper-proof chemical dispensing device for high security environments

Description:
This patent application is a continuation of U.S. patent application Ser. No. 09/828,554, filed Apr. 5, 2001 U.S. Pat. No. 6,439,272, entitled TAMPER-PROOF CHEMICAL DISPENSING DEVICE FOR HIGH SECURITY ENVIRONMENTS, which claimed priority to U.S. Provisional Application No. 60/262,733 filed Jan. 19, 2001, and No. 60/194,811 filed Apr. 5, 2000. This patent application relates to and expressly incorporates herein by reference U.S. Provisional Patent Application No. 60/262,733 for TAMPER-PROOF CHEMICAL DISPENSING DEVICE FOR HIGH SECURITY ENVIRONMENTS, by Wertheim, filed Jan. 19, 2001, and U.S. Provisional Patent Application No. 60/194,811, for TAMPER-PROOF CHEMICAL DISPENSING DEVICE FOR HIGH SECURITY ENVIRONMENTS, by Wertheim, filed Apr. 5, 2000. 
    
    
     BACKGROUND OF THE INVENTION 
     The present invention is directed to methods and apparatus for dispensing liquids, and more particularly is directed to dispensing liquid from a tamper proof container. More specifically the present invention relates to dispensing cleaning products from a tamper proof container suitable for use in jail, correctional facility, school, public facility, or any other location subject to abuse or vandalism. 
     Liquid and soap dispensers have been used for many years. These dispensers are used in a number of applications, including: soap dispensers in restrooms, beverage dispensers, liquid dispensers at gas stations, etc. For example U.S. Pat. No. 4,911,212 discloses a device used to dispense water or other liquids into a reusable container. U.S. Pat. No. 5,088,621 discloses a dispenser to be used at a gas station. The &#39;621 patent discloses an apparatus used to dispense a predetermined amount of liquid from a reservoir mounted on the dispenser. These devices although suitable in many applications do not provide a tamper proof dispenser. 
     Therefor there is a need for a tamper proof dispenser that can be used in correctional facilities, prisons, jails, public restrooms, schools and other facilities or institutions where the dispenser is susceptible to abuse or vandalism. 
     SUMMARY OF THE INVENTION 
     The present invention can be characterized as a tamper proof apparatus for dispensing liquid comprising a first chamber, a second chamber coupled to the first chamber, a first lockable door recessed within one of the first chamber and the second chamber such that a first hinge pin is not removable, a mixing unit within the first chamber, a water supply hose coupled to the mixing unit, a first concentrate supply hose coupled to the mixing unit, and an output hose in one of the first chamber and the second chamber coupled to the mixing unit and to a feed-through such that the output hose is not exposed outside the chambers. 
     The present invention also can be characterized as a method of dispensing liquid from a dispensing unit comprising supplying a mixing unit with water through a water supply hose, the mixing unit being stored in a first chamber, supplying a mixing unit with concentrate through a concentrate supply tube, the concentrate being stored in a second chamber, mixing the water and the concentrate within a mixing unit to form a liquid mixture and dispensing the liquid mixture through an output supply hose into a container, the output supply hose being coupled to a feed-through in the dispensing unit such that the output supply hose is not accessible from the outside of the dispensing unit. 
    
    
     DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a perspective view of a dispensing unit for use with soap and other cleaning or chemical materials. 
     FIG. 2 is a front partial cross-sectional view of the dispensing unit of FIG.  1 . 
     FIG. 3 is a side partial cross-sectional view of the dispensing unit of FIG.  1 . 
     FIG. 4 is an enlarged view of the end of the upper hinge in FIG. 1 with crimps in the hinge to secure a hinge pin into the hinge. 
     FIG. 5 is a top view of the hinge in FIG. 1 the hinge being recessed behind the top of the dispensing unit. 
     FIG. 6 is a side view of a horizontal plate from FIG. 3 welded to the back of the dispensing unit. 
     FIG. 7 is a top partial cross-sectional view of the dispensing unit of FIG.  1 . 
     FIG. 8 is a enlarged cross sectional view of a button shown in FIG.  7 . 
     FIG. 9 is a top view is shown of a base of the dispensing unit of FIG.  1 . 
     FIG. 10 is the dispenser unit for use with soap and other cleaning or chemical materials with an alternative faceplate. 
     FIG. 11 is a front cross-section view of the faceplate of FIG.  10 . 
     FIG. 12 is a side partial cross-section of the faceplate of FIG.  10 . 
     FIG. 13 is a enlarged view of a barbed in-line connector shown in FIG.  3 . 
     FIG. 14 is a side view of the dispensing unit of FIG. 1 mounted on a wall with a mop bucket underneath the dispensing unit. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The following description of the presently contemplated best mode of practicing the invention is not to be taken in a limiting sense, but is made merely for the purpose of describing the general principles of the invention. The scope of the invention should be determined with reference to the claims. 
     Referring first to FIG. 1 shown is a dispensing unit  10  for use with soap and other cleaning or chemical materials. Shown is a dispensing unit  10 , a first concentrate supply reservoir  14 , a second concentrate supply reservoir  16 , a water supply hose  62 , an upper lockable door  28 , a lower lockable door  30 , a first outlet  72 , a second outlet  74 , a third outlet  76 , a fourth outlet  78 , a second metal feed-through  128 , a third metal feed-through  130 , a fourth metal feed-through  132 , a fourth output hose  70 , an upper hasp  32 , a lower hasp  34 , a faceplate  26 , a first button  54 , a second button  56 , a third button  58 , a fourth button  60 , a drain hole  84 , a mop bucket  82 , an upper hinge  88 , a lower hinge  90 , a base  87 , a first recessed cavity  36 , a second recessed cavity  38 , a first concentrate supply cap  44 , a second concentrate supply cap  45 , and a spray bottle or container  80 . 
     Referring next to FIG. 2, shown is a front partial cross-sectional view of the dispensing unit  10  of FIG.  1 . Shown is the upper lockable door  28 , the lower lockable door  30 , the upper hinge  88 , the lower hinge  90 , the first concentrate supply reservoir  14 , the second concentrate supply reservoir  16 , a first lock  92 , a second lock  94 , the upper hasp  32 , the lower hasp  34 , a mixing unit  48 , the water supply hose  62 , a first concentrate supply tube  96 , a second concentrate supply tube  98 , a first barbed in-line connector  100 , a second barbed in-line connector  102 , a first Y connector  104 , a second Y connector  106 , a first check valve  108 , a second check valve  110 , a third check valve  112 , a fourth check valve  114 , the faceplate  26 , the spray bottle or container  80 , the first outlet  72 , the second outlet  74 , the third outlet  76 , the fourth outlet  78 , a first output hose  64 , a second output hose  66 , a third output hose  68 , the fourth output hose  70 , a first metal feed-through  126 , the second metal feed-through  128 , the third metal feed-through  130 , the fourth metal feed-through  132 , the first button  54 , the second button  56 , the third button  58 , the fourth button  60 , the first recessed cavity  36 , the second recessed cavity  38 , the first concentrate supply cap  44 , the second concentrate supply cap  45 , an upper chamber  46 , the base  87 , a lower chamber  52 , and a horizontal plate  50 . 
     The dispensing unit  10  features the upper lockable door  28  and the lower lockable door  30  that can be secured using the first lock  92  and the second lock  94 , respectively, such as is known in the art, onto the upper hasp  32  and the lower hasp  34  within the first recessed cavity  36  in the upper locking door  28  or the second recessed cavity  38  in the lower locking door  30 . Behind the lower lockable door  30 , the first concentrate reservoir  14  and second concentrate reservoir  16  are accessible. Advantageously, the first lock  92  is less exposed to abuse or vandalism when in the first recessed cavity  36 . The first recessed cavity  36  makes it harder to hit or exert pressure on the first lock  92 , thus making the first lock  92  harder to break. The second lock  94  and the second recessed cavity  38  function in the same manner. 
     Preferably, the dispensing unit  10  has the first outlet  72 , the second outlet  74 , the third outlet  76 , and the fourth outlet  78 . The first outlet  72  and fourth outlet  78  are located at the base  87  of the dispensing unit  10 . The second outlet  74  and third outlet  76  are preferably located at the faceplate  26 . Thus, the first button  54 , the second button  56 , the third button  58  and the fourth button  60  are used to activate valves within the mixing unit  48 . The first button  54 , the second button  56 , the third button  58  and the fourth button  60  are accessible through the faceplate  26 . However, the dispensing unit  10  could operate with only one outlet located either in the faceplate  26  or the base  87  of the dispensing unit  10  or with more than two outlets located either in the faceplate  26  or the base  87  of the dispensing unit  10 . Additional buttons could be added if more outlets were added to the faceplate  26  or the base  87  of the dispensing unit  10 . Additionally, alternative outlets could be located at various places on the dispensing unit  10 . 
     The mixing unit  48  is concealed behind the faceplate  26 . The faceplate is in the upper chamber  46 . The faceplate  26  is accessible through the upper lockable door  28  and prevents access to the mixing unit  48 , hoses, tubes and other hardware within the dispensing unit  10 . A horizontal plate  50  or barrier separates the upper chamber  46  of the dispensing unit  10  from the lower chamber  52  of the dispensing unit  10 , thus preventing access to the mixing unit  48  and other hardware located in the upper chamber  46 , via the lower chamber  52  or the lower locking door  30 . The upper chamber  46  and lower chamber  52  could also be side by side or the upper chamber  46  could be below the lower chamber  52  without affecting the use of the dispensing unit  10 . 
     Advantageously, the dispensing unit  10  is mounted on a wall in a permanent or semi-permanent fashion at a height barely sufficient to allow the placement of the mop bucket  82  beneath the dispensing unit  10 . Clearance may be, for example, one-half inch between the top of the mop bucket  82  and the base  87  of the dispensing unit  10 , thus allowing sufficient room for the mop bucket  82  to be rolled beneath the dispensing unit  10 , but insufficient clearance for a taller and larger receptacle to be placed beneath the dispensing unit  10 . This prevents, for example, an inmate from using an excessive amount of cleaning product by filling up a larger receptacle than required for the job, such as a large garbage can. Advantageously, this helps keep the cost of cleaning down and the amount of cleaning product used to a minimal amount. 
     Within the dispensing unit  10 , water is mixed in the mixing unit  48  with concentrate from the first concentrate reservoir  14  or the second concentrate reservoir  16  at particular ratios, with the mixture being dispensed through one of the first outlet  72 , the second outlet  74 , the third outlet  76 , and the fourth outlet  78 , accessible at either an exterior of the dispensing unit  10  or through the faceplate  26  within the dispensing unit  10 . 
     The first concentrate reservoir  14  and the second concentrate reservoir  16  are preferably a first flexible plastic bladder and a second flexible plastic bladder housed within a first cardboard container and a second cardboard container, respectively. The first flexible plastic bladder includes a first port through which the concentrate is withdrawn by suction into the first concentrate supply tube  96 . The first port includes a first safety valve that prevents spillage of the concentrate from the first port, but opens when the first concentrate supply cap  44  is place onto the first port such as by screwing the first concentrate supply cap  44  onto the first concentrate reservoir  14  to permit the concentrate to exit through the first port. The first flexible plastic bladder collapses as the concentrate is drawn out of the first flexible plastic bladder through the first concentrate supply cap  44  and little or no air is allowed to enter the first concentrate supply tube  96  or the first flexible plastic bladder. 
     The concentrate is drawn through the first concentrate supply cap  44  and into the first concentrate supply tube  96 , and then up into the upper chamber  46  of the dispensing unit  10  to the mixing unit  48 . Once the concentrate reaches the mixing unit  48 , it is mixed with a prescribed amount of water when a valve is opened in the mixing unit  48  in response to the pressing of the first button  54 , accessible through the faceplate  26 . When the first button  54  is pressed, pressure available on the water supply hose  62 , e.g., city water pressure, forces a mixing of the concentrate with water at the prescribed ratio, through the Venturi effect. The Venturi effect is used to suction the concentrate from the first flexible plastic bladder through the first concentrate supply tube  96 . 
     The mixed water and concentrate then leaves the mixing unit  48  through the first output hose  64  that routes the mixed water and concentrate to the first outlet  72  at the base  87  of the dispensing unit  10 . Alternatively, if a second button  56  is pressed, pressure available on the water supply hose  62 , e.g., city water pressure, forces a mixing of the concentrate with water at the prescribed ratio, through the Venturi effect. The Venturi effect is used to suction the concentrate from the first flexible plastic bladder through the first concentrate supply hose  96 . The mixed water and concentrate then leaves the mixing unit  48  through the second output hose  66  that routes the mixed water and concentrate to the second outlet  74  located at the faceplate  26  of the dispensing unit  10 . 
     The second outlet  74  and a third outlet  76  at the faceplate  26  are for filling small hand-held bottles or containers  80 , such as spray bottles while the first outlet  72  and the fourth outlet  78  located at the base  87  of the dispensing unit  10  are for filling larger receptacles, such as mop buckets  82 . Advantageously, at the second outlet  74 , and the third outlet  76  the second metal feed-through  128  and the third metal feed through  130  are welded to the faceplate  26 . The second output hose  66  and the third output hose  68  attach to the second metal feed-through  128  and the third metal feed-through  130  on the backside of the faceplate  26 . The second output hose  66  and third output hose  68 , thus are not exposed outside the faceplate  26  and thus can not be pulled on from outside. This helps prevent damage to the mixing unit  48  by not allowing the second output hose  66  or third output hose  68  to be pulled, thus putting pressure on the mixing unit  48 . 
     Advantageously, in use, the lower lockable door  30  is generally left in a locked state. The buttons  54 ,  56 ,  58 ,  60  and the outlets  74 ,  76  are accessible when only the upper lockable door  28  is opened. Storage of the spray bottle or container  80  within the indentation in the faceplate  26  also advantageously provides a convenient and secure storage capability. 
     The upper lockable door  28  can be secured in a locked position when the dispensing unit  10  is not in use and opened when the dispensing unit  10  is in use, whereby mixed concentrate and water, a cleaning product, can be dispensed only when the upper lockable door  28  is opened. When the upper lockable door  28  is closed and locked, the buttons  54 ,  56 ,  58 ,  60  cannot be accessed, and thus no product can be dispensed through either the second outlet  74  and the third outlet  76  in the faceplate  26  or the first outlet  72  and fourth outlet  78  located in the base  87  of the dispensing unit  10 . 
     The indentation in the faceplate  26  limits access to the second outlet  74  and the third outlet  76 , located in the faceplate  26 , thus preventing bottles or containers above a predefined height from being positioned within the indentation for filling at the second outlet  74  or the third outlet  76 . This height restriction functions similarly to the height restriction imposed by placing the dispenser unit  10  so that very little clearance is afforded between the height of the mop bucket  82  and the base  87  of the dispensing unit  10 . 
     Water under pressure is supplied to the dispensing unit  10  through the water supply hose  62 , which passes up through the base  87  of the dispensing unit  10 , then up and down through the horizontal plate  50  in a serpentine fashion so as to provide strain relief against pulling on the water supply hose  62  from beneath the dispensing unit  10 . This is effective in preventing damage to the mixing unit  48  when the water supply hose  62  is pulled upon. Advantageously, a coupling  124 , better shown in FIG. 3, between the water supply hose  62  and an internal portion of the water supply hose  62  is made in the lower chamber  52  of the dispensing unit  10  and is thus not accessible from outside the dispensing unit  10 . After passing up through the horizontal plate  50  looping over and back down through the horizontal plate  50  and then looping back up through the horizontal plate  50 , for a total of three passes through the horizontal plate  50 , the upper portion of the water supply hose  62  is coupled to the mixing unit  48 . 
     Within the mixing unit  48 , the water under pressure supplied by the water supply hose  62  is routed to four valves that are actuated, respectively, by the first button  54 , the second button  56 , the third button  58 , and the fourth button  60 . Upon actuation of, for example, the first button  54 , water is allowed to flow into a mixing chamber within the mixing unit  48  wherein concentrated cleaning product is drawn from the first cleaning reservoir  14  up through the first concentrate supply tube  96  and mixed with the water passing through the mixing chamber by the Venturi effect. 
     After mixing, the mixed water and concentrate pass out of the mixing unit  48  into the first output hose  64  which directs the mixed water and concentrate to the first outlet  72  at the base  87  of the dispensing unit  10 . Advantageously, at the first outlet  72 , the first output hose  64  is coupled to the first metal feed-through  126  that is welded to the base  87  of the dispensing unit  10 , thereby making the first output hose  64  inaccessible from outside the dispensing unit  10 . 
     Similarly, when the second button  56  is depressed, a second valve is opened allowing water to flow into a second mixing chamber. Concentrated cleaning product is drawn up from the first cleaning reservoir  14  into a second mixing chamber, and mixed with water from the water supply hose  62 . The mixed water and concentrate is then directed to the second outlet  74  located in the faceplate  26 . Again, advantageously, the second output hose  66  is coupled to the second metal feed-through  128 , which is welded through the faceplate  26  so that the second output hose  66  cannot be accessed from outside of the dispensing unit  10 , even when the upper lockable door  28  is open. 
     When the third button  58  is depressed, water from the water supply hose  62  enters a third mixing chamber and concentrated cleaning product is drawn from the second concentrate reservoir  16  up through the second concentrate supply tube  98  to the third mixing chamber. Water mixed with concentrate exits the third mixing chamber into the third output hose  68 , which is directed to the third outlet  76  located in the faceplate  26 . At the third outlet  76  the third metal feed-through  130  is welded to the faceplate  26 . The third output hose  68  is coupled to the third metal feed-through  130  to prevent the third output hose  68  from being accessed even when the upper lockable door  28  is open. 
     When the fourth button  60  is depressed, similar operation occurs with water and concentrate from the second concentrate reservoir  16  being mixed in a fourth mixing chamber and mixed water and concentrate being directed through the fourth output hose  70  to the fourth outlet  78  on the base  87  of the dispensing unit  10 . As with the other outlets, the fourth metal feed-through  132  is welded to the base  87  of the dispensing unit  10  so the fourth output hose  70  is not accessible from outside the dispensing unit  10 . 
     Near a first concentrate supply tube hole  160  in the horizontal plate  50  through which the first concentrate supply tube  96  passes, the first concentrate supply tube  96  is cut, with the first barbed inline connector  100  being inserted to allow connection of a remainder of the first concentrate supply tube  96  to an initial portion. Advantageously, the first concentrate supply tube  96  is stretched over the first barbed inline connecter  100  to a diameter that exceeds a diameter of the first concentrate supply tube hole  160  in the horizontal plate  50 . This prevents tension placed on a portion of the first concentrate supply tube  96  below the horizontal plate  50  from being translated to any portion of the concentrate supply tube above the first barbed inline connector  100 . In other words, even if the portion of the first concentrate supply tube  96  protruding below the horizontal plate  50  were pulled so hard as to break it, no strain would be placed on the mixing unit  48  or the portions of the first concentrate supply tubes  96  above the horizontal plate  50 . The same operation takes place with respect to the second concentrate supply tube  98 , the second barbed inline connecter  102 , and a second concentrate supply tube hole  162 . 
     Above the first barbed inline connector  100 , the first Y connector  104  is placed so as to allow concentrate from the first concentrate reservoir  14  to be supplied to the first and second mixing chambers. Above the first Y connector  104 , the first check valve  108  and the second check valve  110  are inserted in each of the two concentrate supply tube segments above the first Y connectors  104 . The first check valves  108  and the second check valve  110  prevent concentrate or air from leaking back down through the first concentrate supply tube  96 . This functionality is advantageous when, for example, the first button  54  is depressed so that no air is drawn from the second mixing chamber into the first concentrate supply tube  96 . The second check valve  110  would prevent the air from the second mixing chamber from going into the first concentrate supply tube  96 . The other remaining check valves  108 ,  112 ,  114  function in a similar fashion when an adjacent mixing chamber is utilized. 
     Referring next to FIG. 3, a side view is shown, partially in cross-section, of the dispensing unit  10 . Shown is the upper padlock  92 , the lower padlock  94 , the upper hasp  32 , the lower hasp  34 , the upper lockable door  28 , the lower lockable door  30 , the horizontal plate  50 , the second supply reservoir  16 , the water supply hose  62 , the coupling  124 , the second concentrate supply tube  98 , the second barbed in-line connector  102 , the second Y connector  106 , the first output hose  64 , the third output hose  68 , the fourth output hose  70 , the first outlet  72 , the first metal feed-through  126 , the faceplate  26 , the spray bottle or container  80 , the drain hole  84 , a lower surface  83  of the indentation  85  in the faceplate  26 , a drain tube  86 , the upper chamber  46 , the lower chamber  52 , the mixing unit  48 , the fourth button  60 , and the spray bottle or container  80 . 
     The drain hole  84  is also preferably located at the lower surface  83  of an indentation  85  in the faceplate  26  so that any dripage or spillage resulting from the filling of bottles or containers  80  at the faceplate  26  is directed into the drain hole  84  and routed through the drain tube  86  to a drainage outlet  168  at the base  87  of the dispensing unit  10 . 
     The drain tube  86  passes between the first concentrate reservoir  14  and the second concentrate reservoir  16  to the base  87  of the dispensing unit  10  where it is connected to the drainage outlet  168  welded to the base  87  of the dispensing unit  10 . This prevents the drain tube  86  from being exposed outside the dispensing unit  10 , thus preventing it from being pulled upon. Similarly, the drain tube  86  is connected to the drain hole  84  behind the faceplate  26  so as not to expose the drain tube  26  to the outside of the dispensing unit  10  even when the upper lockable door  28  is unlocked. 
     As can be seen, a lower surface  83  of the indentation  85  of the faceplate  26  is tipped slightly toward the rear of the dispensing unit  10  so that any spillage falling on the lower surface  83  is directed to the drain hole  84  and through the drain tube  86  to the outlet at the base  87  of the dispensing unit  10 . 
     As can be seen, the coupling  124  between the water supply hose  62  and an upper portion of the water supply hose  62  is within the lower chamber  52  of the dispensing unit  10  and thus not accessible from outside the dispensing unit  10 . The portion of the water supply hose  62  is coupled to the mixing unit  48 , where, as explained above, cleaning product from the concentrate supply tubes are mixed with water from the water supply hose  62  and directed out through the first output hose  64 , the second output hose  66 , the third output hose  68  and the fourth output hose  70  through the first outlet  72 , the second outlet  74 , the third outlet  76 , and the fourth outlet  78 , respectively. The first outlet  72 , the second outlet  74 , the third outlet  76 , and the fourth outlet  78  are coupled to a first metal feed-through  126 , a second metal feed-through  128 , a third metal feed-through  130 , and a fourth metal feed-through  132 , respectively, welded through the faceplate  26  or base  87  of the dispensing unit  10 . The first metal feed-through  126  and fourth metal feed-through  132  are welded to the base  87  of the dispensing unit  10 . The second metal feed-through  128  and third metal feed-through  130  are welded to the faceplate  26 . 
     Advantageously, the first metal feed-through  126 , the second metal feed-through  128 , the third metal feed-through  130 , and the fourth metal feed-through  132  prevent the first output hose  64 , the second output hose  66 , the third output hose  68  and the fourth output hose  70 , respectively, from being exposed outside the base  87  of the dispensing unit  10  or the outside of the faceplate  26 . This prevents, for example, an inmate or vandal from pulling on one of the output hoses and damaging the output hoses or mixing unit  48 . 
     Referring next to FIG. 4, an end of the upper hinge  88  is shown with crimps  136  in the upper hinge  88  to secure a hinge pin  138  into the upper hinge  88 . The upper hinge  88  is crimped only on alternative sections so as to allow the door to open while not allowing the hinge pin  138  to slide out of the upper hinge  88 . Advantageously, this does not allow an inmate in a jail or prison to remove the hinge pin  138  and furnish it into a weapon. 
     Referring to FIG. 5, a top view is shown of the upper hinge  88 , with the upper hinge  88  being recessed, so that the hinge pin  138  will not clear a frame of the upper lockable door  28 , and thus cannot be removed from the upper hinge  88 , even if the crimps in the upper hinge  88  are loosened. The top portion  140 , shown in FIG. 3, of the dispensing unit  10  will always be on top of the hinge pin  138 , whether the upper lockable door  28  is open or closed, thus preventing the hinge pin  138  from sliding out of the upper hinge  88 . The hinge pin  138  may also be optionally welded to the upper hinge  88  at its ends, to further make difficult its removal. 
     The upper hinge  88  is secured to the upper lockable door  28  using prison screws  142 ,  144 , or other difficult to remove fasteners, that pass through the upper hinge  88  and through a steel plate  146 ,  148  to lock nuts  150 ,  152 , i.e., hex nuts including nylon inserts. Advantageously, the steel plates  146 ,  148  are juxtaposed along the height of respective halves of the upper hinge  88 , and are threaded, such than even in the event the lock nuts  150 ,  152  are removed, the prison screws  142 ,  144  are not readily removable from the upper hinge  88 . Both sides of the upper hinge  88  are secured, respectively, to the door frame or upper lockable door  28  using prison screws  142 ,  144 , steel plates  146 ,  148 , and lock nuts  150 ,  152 . The lower lockable door  30  and the lower hinge  90  function in a similar manner. 
     Referring to FIG. 6, the horizontal plate  50  is shown welded to a back of the dispensing unit  10 . The horizontal plate  50  advantageously separates the lower chamber  52  of the dispensing unit  10  from the upper chamber  46  of the dispensing unit  10 . This helps to isolate different areas of the dispensing unit  10  and helps to prevent damage to the mixing unit  48 . Additionally, it isolates the concentrate supply reservoirs  14 ,  16  from the buttons  54 ,  56 ,  58 ,  60  of the dispensing unit  10 . This allows the dispensing unit  10  to operate, while only allowing access to the upper chamber  46  of the dispensing unit  10 . 
     Advantageously, the horizontal plate  50  also helps to protect the mixing unit  48 . The horizontal plate  50  does not allow any pressure to be put on the mixing unit  48  when someone pulls on either the water supply hose  62  or one of the first concentrate supply tube  96  and second concentrate supply tube  98 . The three holes  153 ,  155 ,  157  for the water supply hose  62 , shown in FIG. 7, provide a strain relief such that if someone pulls on the water supply hose  62  from outside the dispensing unit  10  the horizontal plate  50  will not allow the water supply hose  62  to pull on the mixing unit  48 . Additionally, if someone while accessing the lower chamber  52  were to pull on the first concentrate supply tube  96  or the second concentrate supply tube  98 , a first concentrate supply hose hole  160  and a second concentrate supply hose hole  162  in the horizontal plate  50  acting in combination with the first barbed in-line connector  100  and the second barbed in-line connector  102 , respectively, would prevent the concentrate supply tubes from pulling on the mixing unit  48 . This is further shown in FIG.  13 . 
     Referring to FIG. 7, a top view is shown of the dispenser unit  10 , partially in cross section. Shown are the water supply house  62 , the mixing unit  48 , the first button  54 , the second button  56 , the third button  58 , the fourth button  60 , the horizontal plate  50 , the faceplate  26 , the upper lockable door  28 , the upper hasp  32 , a first water supply hose hole  154 , a second water supply hose hole  156 , a third water supply hose hole  158 , the first concentrate supply tube hole  160 , and the second concentrate supply tube hole  162 . 
     The water supply hose holes  154 ,  156 ,  158  help to prevent damage to the mixing unit  48 . The water supply hose  62  first comes up through the first water supply hose hole  154  into the upper chamber  46 , then down through the second water supply hose hole  156  into the lower chamber  52 , and finally back up through the third water supply hose hole  158  into the upper chamber  46  before it attaches to the mixing unit  48 . This is one design that provides protection to the mixing unit  48  by providing strain relief on the water supply hose  62  should it be pulled upon from the outside of the dispensing unit  10 . More holes or other means of providing strain relief could also be utilized. 
     Additionally, the concentrate supply tube holes  160 ,  162  prevent damage to the mixing unit  48  in the event the concentrate supply tubes  96 ,  98  are pulled upon. This is further shown in FIG.  13 . 
     Referring to FIG. 8, a partial cross sectional view is shown of a button, such as the fourth button  60 . Also shown is a metal cylinder  164 , and a portion of the faceplate  26 . The metal cylinder  164  prevents access to behind the faceplate  26 , and hinders the use of prying tools on the fourth button  60 , such as may be used to remove the fourth button  60 . Additionally, the metal cylinder  164  helps prevent objects from being lodged between the fourth button  60  and the metal cylinder  164 , thus locking the fourth button  60  into a depressed position. The metal cylinder  164  advantageously helps to prevent damage to the fourth button  60  and prevents the fourth button  60  from being pulled. This is achieved by having a negligible amount of space between the exterior edges of the fourth button  60  and the interior of the metal cylinder  164 . Additionally, the fourth button  60  does not extend beyond the faceplate  26  or the metal cylinder  164 , which helps to prevent the fourth button  60  from being inadvertently pushed or damaged by anything bumping into or hitting the dispensing unit  10 . The first button  54 , the second button  56 , and the third button  58  function in the same manner. 
     Referring to FIG. 9, a top view is shown of the base  87  of the dispensing unit  10 . Shown is a water supply hose hole  166 , the first outlet  72 , the fourth outlet  78 , and the drainage outlet  168 . Advantageously, the first outlet  72 , the fourth outlet  78  and the drainage outlet  168  have the first metal feed-through  126 , the fourth metal feed-through  132 , and a drainage metal feed-through, respectively, on the inside of the lower chamber  52  such that any tubing does not extend to the outside of the dispensing unit  10 . Although not shown, a similar feed-through could be used for the water supply hose  62  on the inside of the lower chamber  52 . If a metal feed through was used for the water supply hose  62 , the water supply hose  62  would not have to wind up and down through the horizontal plate  50 , as the mixing unit  48  would already be protected from pulling on the water supply hose  62 . 
     Referring to FIG. 10, a perspective view is shown of an alternative embodiment of the dispensing unit  10  of FIG.  1 . The alternative dispensing unit  10  is similar to the dispensing unit  10  of FIG. 1 in all respects, except in the design of the indentation  165  in a faceplate  166 , and position and orientation of a first output  168  and a second output  170  in the faceplate  166 , and the direction of a first metal feed-through  169  and a second metal feed-through  171 . 
     Advantageously, the first output  168  and second output  170  are on a top portion of the indentation  165  of the faceplate  166 . The first metal feed-through  169  and second metal feed-through  171  are welded to the faceplate  166  at the first output  168  and second output  170 , respectively, The second output hose  66  and third output hose  68  are connected to the first metal feed-through  169  and second metal feed-through  171 , respectively, behind the faceplate  166  so as not to expose any tubing outside the dispensing unit  10 . The first metal feed-through  169  and second metal feed-through  171  are advantageously directed toward the back of the faceplate  166  as can be seen in FIG.  12 . 
     As can be seen, the indentation  165  is smaller than the indentation  85  shown in FIG. 1, limited in size to dimensions just big enough to accommodate the spray bottle or container  80  shown. In this way the filling of larger containers is inhibited. 
     FIG. 11 is a front view of the faceplate  166  of the alternative design, and FIG. 12 is a side view of the faceplate  166  of the alternative design. As can be seen, the first metal feed-through  169  and second metal feed-through  171  welded through the faceplate  166  are bent and angled slightly back toward a back of the indentation  165  in the faceplate  166 . This orientation prevents or makes difficult the filling of receptacles unless they are inserted into the indentation. This prevents large containers from being filled as the cleaning solution of water and concentrate will not be dispensed outwardly from the dispensing unit  10 , but rather slightly toward the back of the faceplate  166  where a large container will not fit. Also shown in FIG. 12 is the drain hole  84 , and the drain tube  86 , as well as one of the metal cylinders that envelop the buttons  54 ,  56 ,  58 ,  60 , such as better shown in FIG.  8 . 
     Advantageously, the drain hole  84  is a metal tube and the drain tube  86  connects to the metal tube behind the faceplate  166 . Again this prevents access to the drain tube  86  and prevents the drain tube  86  from being pulled on or ripped out of the dispensing unit  10 . The bottom section of the faceplate  166  containing the drain hole  84  is slightly angled such that any excess fluid coming from the first output  168  and the second output  170  will be directed back to the drain hole  84  and not spill over the front of the dispensing unit  10 . 
     Referring to FIG. 13, shown is the concentrate supply tube hole  162  shown in FIG.  7  and the second barbed in-line connector  102  and the second concentrate supply tube  98  shown in FIGS. 2 and 3. 
     The second barbed in-line connector  102  is inserted into the second concentrate supply tube  98  in the upper chamber  46  of the dispensing unit  10 . The diameter of the second barbed in-line connector  102  is greater than the diameter of the second concentrate supply tube hole  162  in the horizontal plate  50 . Advantageously, when the second concentrate supply tube  98  is pulled on from the lower chamber  52  the second barbed in-line connector  102  will be pulled down toward the second concentrate supply tube hole  162 , but not allow the second concentrate supply tube  98  to be pulled any further. This prevents any pressure from being put on the mixing unit  48 , as the second concentrate supply tube  98  will break in the lower chamber  52  without any pressure being put on the mixing unit  48  because the second barbed in-line connector  102  will not go through the second concentrate supply tube hole  162 . This helps prevent damage to the second concentrate supply tube  98  and mixing unit  48  in the upper chamber  46 . The first barbed in-line connector  100 , first concentrate supply tube  96 , and first concentrate supply tube hole  160  function in the same manner as describe above. 
     Additionally, the same functionality could be used for the first output hose  64  and the fourth output hose  70 . For example, a barbed in-line connector could be inserted in the first output hose  64  just above the horizontal plate  50 . Advantageously, if the first output hose  64  were pulled, no pressure would be put on the mixing unit  48  because the barbed in-line connector would not go through the hole in the horizontal plate  50 . This would also prevent damage to the portion of the, first output hose  64  which is in the upper chamber  46 . Advantageously, this prevents damage to the mixing unit  48  even when the lower lockable door  30  is open. 
     Referring to FIG. 14, a side view is shown of the dispensing unit attached to a wall. Shown is the dispensing unit  10 , the wall, and the mop bucket  82 . 
     Advantageously, when the mop bucket  82  is below one of the first outlet  72  and the fourth outlet  78  at the base  87  of the dispensing unit  10  there is a small clearance between the top of the mop bucket  82  and base  87  of the dispensing unit  10 . For example, the distance could be one half of an inch. However, any distance which prevents taller and larger receptacles which are not meant to be filled with the liquid, and are available, from fitting below the dispensing unit  10 , would be sufficient. This reduces the amount of wasted fluid and thus decreases the cost of cleaning. 
     While the invention herein disclosed has been described by means of specific embodiments and applications thereof, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope of the invention set forth in the claims.