Patent Publication Number: US-2023150810-A1

Title: Water container with manual dispensing valve

Description:
FIELD OF THE INVENTION 
     The present invention relates to a water dispenser with a manually operable toggle valve with a valve member that is resiliently pre-stressed towards a closing state. 
     BACKGROUND OF THE INVENTION 
     Water dispensers are provided with a large variety of valve arrangement, including taps in which the valve is rotating and pre-stressed toggle valves. An example of the latter is disclosed in U.S. Pat. No. 8,448,564 where a valve member is arranged in a bottom cavity of the water container. A lever activates a stem that extends into the outlet channel of the valve arrangement so that toggling of the lever moves a valve member at the end of the stem to open an outlet channel inside the valve arrangement. 
     Typical for many dispensers is a relatively complex construction of the valve arrangement which elevates production costs. For example, in the above example U.S. Pat. No. 8,448,564, a valve arrangement is inserted into the side wall of the container and needs sealing between the container and the valve arrangement in addition to the sealing between the valve member and the valve seat inside the valve arrangement. 
     It would be desirable to provide a water dispenser with a valve arrangement that is simple in construction with few components. 
     DESCRIPTION/SUMMARY OF THE INVENTION 
     It is an objective to provide an improvement in the art. Especially, it is an objective to provide a valve arrangement and a water dispenser with such valve arrangement with a high degree of simplicity but high reliability. This is achieved with a water dispenser and valve arrangement as explained below and by a water dispenser as defined in the claims. 
     The water dispenser comprises a container for holding water for dispensing from the container. One use of such dispenser is dispensing of water after having been cooled down in a refrigerator in which the dispenser is placed. 
     Although, the container in principle can be formed like a sphere, the container would typically have well defined top, side wall and bottom, which define an inner volume of the container for holding the water. For example, the dispenser stands on the bottom when in use. 
     The container comprises an outlet channel at the bottom of the container for dispensing water from the inner volume through the outlet channel. The outlet channel has an upstream end in the inner volume inside the container for receiving water from the inner volume and a downstream end at an outer side of the container for dispensing the water from the container. 
     In some embodiments, the bottom and the side wall, or side walls, of the container are plastic moulded in one piece. A suitable material is polycarbonate, which also allows the container to be moulded in a solid and highly transparent material. However, other materials, for example polyolefins, are also possible candidates for moulding. 
     For example, the outlet channel and the side wall of the container, or one of the side walls in the event that the container has several side walls, are plastic moulded in one piece, which is advantageous in that no gaskets are necessary between the outlet channel and the container wall. A similar advantage is achieved, if the outlet channel is moulded in one piece with the bottom of the container and extends through the bottom. 
     In comparison, the above-mentioned disclosure in U.S. Pat. No. 8,448,564 requires a seal between the container and the valve arrangement that is inserted through an opening into the container wall. 
     The water dispenser comprises a manually operated valve arrangement so that manual interaction causes the valve arrangement to be opened for dispensing of water. The valve arrangement is further arranged to toggle between a closing state and an open state, typically such that the valve member is resiliently pre-stressed towards the closing state, and manual force is necessary to counteract the resilient pre-stressed closing state for shift towards an opening state. 
     In practical embodiments, a valve member is provided either at an upstream end or at a downstream end of the outlet channel. The valve arrangement is further arranged to toggle between a closing state where the upstream end or the downstream end of the outlet channel is obstructed by the valve member and an open state where the valve member is removed from its obstructing state for dispensing the water from the inner volume through the outlet channel. In these embodiments, the outlet channel also forms the valve seat for the valve member, which is an advantage in order to minimize the number of components for the dispenser, thereby reducing complexity and production costs. 
     Typically, the manual pressing or pulling action to toggle the valve is remote from the valve member. For example, the manually operated valve arrangement comprises a hinged lever arranged for manual push or pull of the lever against the pre-stressing force for changing the valve member from the closing to the open state. 
     In some practical embodiment, manual push or pull action is done on a first end of the lever for moving the valve member by the second end, where the hinge of the lever is located between the first and the second end. In some embodiments, the lever is arranged vertically and hinged horizontally so that a manual force is necessary for pushing or pulling the lever at its first end, which is arranged above the outlet channel. Alternatively, the lever is hinged in a direction different from horizontal, for example vertically, with a corresponding manual action of the lever remote from the outlet channel at some side of the outlet channel. It is preferred that the position for manual action is not below the outlet channel in order to provide easy dispensing from the outlet channel. 
     Optionally, the outlet channel is substantially horizontal and has a substantially horizontal flow direction. A useful further embodiment has been found in providing a small platform just underneath the outlet channel in order for the water to flow downwards from the outlet channel onto the platform during open state of the valve arrangement and for being dispensed to a user from the platform for consumptions. By using the platform, a smooth flow is achieved for the water, which is user friendly. For example, the platform is provided on an outer side of dispenser side wall and extending farther from the side wall than the outlet channel in order for the water to flow onto the platform even where there is a slight pressure on the water from the outlet channel. 
     Optionally, a frame is provided on the side wall of the dispenser and around the outlet channel. For example, the lever is hinged in this frame. In useful embodiments, the frame comprises the platform as an integral part of the frame, such as frame moulded in one piece with the platform. Optionally, the side wall of the container and the frame are plastic moulded in one piece such that also the platform is moulded in one piece with the side wall. 
     In some embodiments, the frame comprises two opposed side portions arranged on opposite sides of the outlet channel. Opposite sides here mean right and left of the outlet channel when the dispenser is in operational orientation for water dispensing. In some of these embodiments, the lever is horizontally hinged in the side portions, and the lever is oriented substantially vertically, rotating about the horizontal rotation axis as defined by the hinge. 
     For example, the frame comprises a profile above the outlet channel and extending from the side wall outwards and extending from one to the other of the side portions, thus extending from the left to the right, for example in a curved fashion that is concave downwards. The profile is provided and arranged for preventing water to flow upwards along the side wall and/or the frame during dispensing of water from the outlet channel and for guiding water from the outlet channel downwards for dispensing, for example for guiding water onto the platform in the event that such platform is provided. 
     Various embodiments are possible for a valve member. In some embodiments, the valve member is moulded from an elastomeric polymer and is sufficiently resilient and soft to provide a good tightening capability against the end of the outlet channel by the valve member without the necessity of additional gaskets, such as O-rings. For example, the valve member is made of silicone. In practical embodiments, the valve member comprises a resilient central part that obstructs the downstream end of the outlet channel in the closing state. Optionally, the valve member also has an upper part, advantageously a curved upper part, above the central part, where the upper part extends from the valve member towards the side wall and thus, forming, a roof above the downstream end of the outlet channel for preventing water to flow upwards along the valve member during dispensing of water from the outlet channel and for guiding water downwards for dispensing. Optionally, this upper part of the valve member is combined with the abovementioned profile between the sides of the frame, where both the profile and the upper part of the valve member are provided above the outlet channel and forming a double-roof system. In this case, these two roofs assist each other in preventing upwards flow of the water. For example, the upper part, such as curved upper part, of the valve member is located between the outlet channel and the profile. 
     In some practical embodiments, the valve member is fastened to the lever. In such embodiments, it is useful if a spring is arranged for acting on the lever in order for the lever to provide the resilient pre-stressing force on the valve member. The valve arrangement is then arranged for being opened by manual force acting on the lever and counteracting the pre-stressing force on the lever and, thus, also on the valve member. 
     If the dispenser is used for filtering water, this is optionally accomplished with an insert, for example a top insert, inserted into the container, where the insert comprises a receptacle for water to be filtered and a water filter compartment for a water filter. The insert is then arranged for receiving water to be filtered into the receptacle and for filtering water through the water filter and into the reservoir by gravity. 
     For course-filtering of the water from the receptacle, a pre-filter is used to catch debris. For fine filtering, the water filter comprises at least one fine filter for filtering microbes. For example, the pre-filter limit is in the range of 150-10 micrometer, typically 10 micrometers. 
     Optionally, the fine filter comprises a plurality of hollow fiber microfiltration and/or ultrafiltration membranes. Alternatively, the filter element comprises a roll of pleated microporous material with microfiltration or ultrafiltration purposes. It is recalled that an ultrafiltration filter has pores that filter particles of a size down to a minimum size, for example a minimum size in the range of 0.001 to 0.01 micrometer, whereas a microfiltration filter has pores that filter particles of a size down to a minimum size of around 0.1 micron. 
     For example, the fine filter is configured for filtering microbes that have a size below a predetermined water filter limit, wherein the predetermined water filter limit is in the range of 0.01 to 0.5 micrometer, optionally in the range of 0.05 to 0.2 micrometers. In order to assure a high flow of water through the filtration system microfiltration is preferred with a filtration of particles having a size down to 0.1 micrometer. 
     Advantageously, bacteria are reduced by 99.9999% (log 6). Optionally, viruses are reduced by 99.99% (log 4). Optionally protozoan and parasites are reduced by 99.9% (log 3). Advantageously, all three criteria are met. 
    
    
     
       SHORT DESCRIPTION OF THE DRAWINGS 
       The invention will be explained in more detail with reference to the drawing, wherein 
         FIG.  1 A  illustrates a water dispenser; 
         FIG.  1 B  illustrates a top insert for the dispenser; 
         FIG.  2 A  shows a front part of a moulded container; 
         FIG.  2 B  illustrates the frame on the front part and a lever and valve member mounted; 
         FIG.  2 C  is a sectional view of the lever mounting; 
         FIG.  2 D  is a font view of the valve member; 
         FIG.  2 E  illustrates the mounting principle of the valve member; 
         FIG.  2 F  shows the valve member from the back; 
         FIG.  2 G  illustrates a cover for the frame; 
         FIG.  2 H  is a sectional view of an alternative embodiment; 
         FIG.  3 A  is a principle sketch of a first embodiment of a valve arrangement; 
         FIG.  3 B  is a principle sketch of a slight modification of the first embodiment; 
         FIG.  3 C  is a principle sketch of a further slightly modification of the first embodiment; 
         FIG.  4 A  is a principle sketch of a second embodiment of a valve arrangement; 
         FIG.  4 B  is a principle sketch of a slight modification of the second embodiment; 
         FIG.  4 C  is a principle sketch of a further modification of the second embodiment; 
         FIG.  5    illustrates a further embodiment of a lever; 
         FIG.  6    illustrates a non-integrated valve arrangement; 
         FIG.  7    illustrates an alternative non-integrated valve arrangement; 
         FIG.  8    illustrates a further alternative non-integrated valve arrangement; 
       FIG. 9 A illustrates a first mounting principle of the non-integrated valve arrangement; 
         FIG.  9 B  illustrates a second mounting principle of the non-integrated valve arrangement; 
         FIG.  10 A  illustrates a separate valve in the water channel; 
         FIG.  10 B  illustrates a slight modification of the embodiment of  FIG.  10 A ; 
         FIG.  10 C  illustrates a lever arrangement for the embodiments of  FIG.  10 A and  10 B . 
     
    
    
     DETAILED DESCRIPTION/PREFERRED EMBODIMENT 
       FIG.  1 A  illustrates a dispenser  1  having a top  2  comprising a lid  2 ′ and a bottom  3  on which it stands when in use, as well as side walls  4 , which in common define a container  5  with an inner volume  6  for water. 
     The dispenser  1  comprises a top insert  7 , which is shown in greater detail in  FIG.  1 B . The top insert  7  is optional and useful when filtering water before consumption, as it comprises a water filter  8  for filtering water inside a filter compartment  9 . When such a top insert  7  is used for the dispenser  1 , water is filled into an upper dirt water receptacle  10  from which the dirt water to be filtered is entering the filter compartment  9  and the filter  8  for finally leaving the filter compartment  9  as filtered water through a filter exit  11  at the bottom of the filter compartment  9  from which it flows into the clean water tank  12  of the container  5 . From the clean water tank  12 , the water can be dispensed through a water outlet  13  typically arranged at the bottom  3  of the clean water tank  12  in order to be able to entirely empty the clean water tank  12  through the water outlet  13 . The water outlet  13  is covered by a valve arrangement  14 . 
     In the shown embodiment, the dispenser  1  is dimensioned and formed to fit into a refrigerator for cooling the water before dispensing it through the water outlet  13 . 
     The bottom  3  and side walls  4  of the container  5 , as illustrated in  FIG.  1   , are advantageously formed as a single piece that is moulded in polymer, for example transparent polymer in order for the user to observe the water level in the container  5 . 
       FIG.  2 A  illustrates that the front of the container  5  comprises a frame  17 , moulded integrally in one piece with the foremost side wall  4 ′. The frame  17  extends outwardly from the foremost side wall  4 ′ and forms a mechanical basis for holding the valve arrangement  14 . The valve arrangement  14  toggles between closing and opening an outlet channel  15  of the water outlet  13 . When water leaves the container  5  through the outlet channel  15 , the water falls onto a platform  16 , for example a curved platform, as illustrated, which is arranged below the outlet channel  15  and which extends farther from the foremost side wall  4 ′ than the outlet channel  15 . From the platform  16 , water is dispensed to the user. The platform  16  is illustrated as a part of the frame  17 , which is, therefore, simple in construction and yields a high mechanical stability. 
     Above the outlet channel  15 , there is provided a profile  18  which is used as a roof above the outlet channel  15  for preventing water to flow upwards and for guiding the water downwards towards the platform  16 . The profile  18  extends between opposite sides of the frame  17 . 
       FIG.  2 B  illustrates a valve arrangement  14  mounted to the frame  17 , where the walls of the container  5  and the frame  17  are moulded in a transparent polymer material. The valve arrangement  14  is simple in its construction and comprises in the shown embodiment only three parts, namely a lever  20 , a valve member  19 , and a helical spring  22 . 
     The lever  20  comprises a hinge profile  21  on either longitudinal side of the lever  20 . The hinge profile  21  comprises a protrusion  21 C that cooperates with a corresponding opening  17 A in the frame  17  for rotational movement of the hinge profile  21  around an axis extending through the openings  17 A of the two sides of the frame  17 . For mounting the lever  20 , the hinge profiles  21  are slightly pressed towards each other so that the hinge profiles  21  with the protrusions  21 C fit in into the space defined by the sides of the frame  17 , and the protrusions  21 C snap into the cooperating openings  17 C. 
     When the first, upper end ( 20 A) of the lever  20  is pressed inwards by a finger against the pre-stressed force of the spring  22 , the second, lower end ( 20 B) moves outwards away from the container  5 , and the valve member  19  will be lifted away from the downstream end  15 B of the channel  15  and open for flow of water through the outlet channel  15  and down onto the platform  16 , from where the water is received by the user for consumption. 
       FIG.  2 C  illustrates sectional view through the frame  17  and the lever  20  as well as the spring  22  and the valve member  19 . The drawing illustrates that not only the profile  18  that creates a roof over the outlet channel  15  prevents water from flowing upwards along the lever  20 , but that also the valve member  19  with its upper cylindrical part  19 A covers the area above the outlet channel and captures water and guides it downwards to the platform  16 . Centrally, a bulb-formed resilient part  19 B forms a gasket against the downstream end  15 B of the outlet channel  15 . 
       FIG.  2 D  shows a perspective view of the valve member  19 , showing the cylindrical part  19 A that extends over an angular span in the range of 180-270°, which is sufficient as a good barrier for preventing water from flowing upwards. 
       FIG.  2 E  and  FIG.  2 F  illustrate the valve member  19  and its mounting in a detailed image. The valve member  19  comprises a notch  19 C fitting with a corresponding protrusion  25 A on the retainer  25  onto which the resilient valve member  19  is mounted by pressing the resilient elastomeric valve member  19  over the cylindrical edge of the retainer  25 . The cooperation of the groove  19 C and the retainer protrusion  25 A assures that the valve member  19  is mounted in a correct orientation. 
       FIG.  2 G  illustrates a cover  19  for the frame  17 , where the cover  29  is pushed over the frame  17  and held in place. A slit  29 A in the cover  29  eases mounting. 
       FIG.  2 H  illustrates a cover  29 , which comprises an edge  29 B at it upper side in order to make it easier for the user to operate the valve arrangement  14 . A user would, thus, place one or two fingers behind the upper edge  29 B and press with the thumb against the first end ( 20 A) of the lever  20 . 
       FIG.  3 A  illustrates a first principle for the valve arrangement  14  where, instead of the upper edge  29 B of the cover  29 , there is such an edge  17 B for ease of operation integrated in the frame  17  itself. The valve arrangement  14  comprises a valve member  19  fastened to the second end of a lever  20  that has a hinged profile  21  and is pre-stressed by a helical coil spring  22  into its closed position. In this embodiment, the valve member  19  closes the downstream end  15 B of the outlet channel  15 . In order to keep the valve member  19  pre-stressed against the downstream end  15 B of the outlet channel  15 , the spring  22  is located between the hinged profile  21  and the first end ( 20 A) of the lever  20  and compressed in order to exert force on the first end ( 20 A) of the lever  20  by expansion of the spring  22 . The expansion force of the spring presses the valve member  19  against the downstream end  15 B of the outlet channel  15 . 
       FIG.  3 B  illustrates the functioning of the first principle for the valve arrangement  14  of  FIG.  3 A  in that a manual push with a finger, for example thumb, against the upper, first end ( 20 A) of the lever  20  removes the valve member  19  from the downstream end  15 B of the outlet channel  15 , so that water can flow unhindered through the outlet channel  15  and down onto the platform  16 , as illustrated by an arrow  27 . 
       FIG.  3 B  show a further feature in addition to the features in  FIG.  3 A , namely a protrusion  17 C on the frame  17 , where the protrusion  17 C in cooperation with the first end ( 20 A) of the lever  20  forms a snap holder when the second end ( 20 B) of the lever  20  is resiliently pressed under the protrusion  23  by manual force, and where the protrusion  23  holds the lever  20  in the valve-open orientation because the force of the spring  22  is not sufficient for returning the lever  20  pass the protrusion  23 . An additional manual press on the first end ( 20 B) of the lever  20  is necessary in order to close the valve arrangement  14  again. 
       FIG.  3 C  illustrates an alternative to the embodiment in  FIG.  3 B  in which a magnet  24  is used as an alternative to the protrusion  23 , and where the magnetic force is sufficiently strong to counteract the force of the spring  22  and hold the lever  20  in place when the first end ( 20 A) of the lever  20  is attached to the magnet  24 . 
       FIG.  3 D  shows a further alternative feature in addition to the features in  FIG.  3 A , namely a snap holder  23  at the hinged profile  21 . When the lever  20  is operated by a manual pushing force against the first end ( 20 A) of the lever  20 , an edge  21 A of the hinged profile  21  is moved pass a protrusion  23  which due to deformation force holds the lever  20  in place, until a manual pushing counterforce against the second end ( 20 B) of the lever  20  is bringing the lever  20  into the closed state orientation where the valve member  19  at the end of the stem  25  is again closing the downstream stream end  15 B of the outlet channel  15 . 
       FIG.  3 E  illustrates an alternative embodiment, where a spring  30  is connecting a holding point  28  on the foremost side wall  4 ′ of the container  5  with an angled arm  21 B of the hinge profile  21  in a knee-joint configuration. In the open configuration, as shown, the holding spring  30  is compressed and exerts an expanding, pushing force in order to hold the lever  20  in an open state of the valve arrangement. During manual pushing of the second end ( 20 B) of the lever  20 , the holding spring  30  is first further compressed, until the spring  30  in upward motion passes a dead point line  28 A, after which is expands again during further manual pushing of the second end ( 20 A) of the lever  20 , after which that the holding spring  30  then holds the lever  20  in an orientation where the lever keeps the valve arrangement  14  in an closing state. 
       FIG.  4 A  illustrates a second principle for the valve arrangement  14 . In this case, the valve arrangement  14  comprises a valve member  19  connected to the end of a stem  31  that is attached with its one end to the second end ( 20 B) of the lever  20 . Also, in this embodiment, the lever  20  is hinged in a hinged profile  21  and pre-stressed by a helical coil spring  22  into its closed position, where the valve member  19  closes the outlet channel  15 . However, in contrast to the embodiment of  FIG.  3 A , the valve member closes the upstream end  15 A of the outlet channel  15 . In order to keep the valve member  19  pre-stressed against the upstream end  15 A of the outlet channel  15 , the spring  22  is located between the hinge profile  21  and the second end ( 20 B) of the lever  20  and compressed in order to exert force on the second end ( 20 B) of the lever  20  by extension of the spring. 
       FIG.  4 B  shows a further feature in addition to the features in  FIG.  4 A , namely a snap holder  26  at the hinged profile  21 . When the lever  20  is operated by a manual pulling force, an edge  21 A of the hinged profile  21  is moved pass a protrusion  23  which due to deformation force holds the lever  20  in place, until a manual pushing counterforce at the first end ( 20 A) of the lever  20  is bringing the lever  20  into the closed state orientation where the valve member  19  at the end of the stem  25  is again closing the upstream end  15 A of the outlet channel  15 . 
       FIG.  4 C  illustrates an alternative embodiment, where a spring  30  is connecting a holding point  28  on the foremost side wall  4 ′ of the container  5  with an angled arm  21 B of the hinge  21  in a knee-joint configuration. The holding spring  30  is compressed when the lever  20  holds the valve arrangement  14  in the closed state. During manual pulling of the first end ( 20 A) of the lever  20 , the holding spring  30  is first compressed, until the spring passes a dead point line  28 A, after which is expands during further manual pulling of the first end ( 20 A) of the lever  20 , so that the holding spring  30  then holds the lever  20  in an orientation where the pre-stressed lever  20  keeps the valve arrangement  14  in an open state. A manual pushing force is necessary at the first end ( 20 A) of the lever  20  in order to bring the lever  20  into the orientation where the lever  20  holds the valve arrangement  14  in a closed state. 
       FIG.  5    illustrates an alternative embodiment for a lever  20 , in which a leaf spring  20 C is integrated as part of the lever  20  material. The leaf spring  20 C has a similar function as the helical coil spring  22  explained above. 
     In the above examples, the lever  20  was held by its hinge profiles  21  inside the frame  17 . In the Example of  FIG.  6   , the valve member  19  and the lever  20  are integrated in a valve insert unit  33 , which is mounted, for example pressed, into the frame  17 . In order to make the connection between the outlet channel  15  and the valve insert unit  32  watertight, a gasket is used between the downstream end  15 B of the outlet channel  15  and the valve insert unit  32 . 
       FIG.  7    also illustrates a valve insert unit  32 , resembling the lever and valve principle of  FIG.  4 A . 
       FIG.  8    illustrates a valve insert unit  32  which uses a different principle for the lever action in that the lever  20  has a central joint  20 D and two hinge profiles  21  on either longitudinal edge of the lever  20 . Pull at the first end  21 A of the lever  20  results in a motion of the second end ( 20 B) in the same direction. 
       FIG.  9 A  and  FIG.  9 B  illustrate mounting principles of the valve insert unit  32 . In  FIG.  9 A , the valve insert unit  32  is pushed into the frame  17  in a lateral direction, whereas in  FIG.  9 B , the valve insert unit  32  is pushed into the frame  17  in a direction parallel with the foremost side wall  4 ′. The latter, however, requires a slight modification of the frame  17  as compared to the embodiments above. 
       FIG.  10 A  illustrates an enlarged view of a valve  34  that is mounted in the foremost side wall  4 ′. The valve  34  comprises a valve stem  31 , around which an O-ring  34 A is provided for tightening against the upstream end  15 A of the outlet channel  15 . Pushing against the head  34 C of the valve  34  will move the O-ring  34 A into the container  5  and away from the upstream end  15 A of the outlet channel  15  so that water can flow through the outlet channel  15 . The O-ring  34 A in cooperation with the stem  31  cover the entrance to the outlet channel  15  at its upstream end  15 A and therefore constitute a closing valve member  19 , taking a role similarly to the one that was discussed above in relation to  FIG.  2   . 
       FIG.  10 B  illustrates a slightly different valve arrangement where the valve is closer to the bottom  3  of the container  5  in order to make sure that substantially all water can be emptied through the valve  34 . 
       FIG.  10 C  illustrates a lever  20  that can be used to push the head  34 C of the valve of  FIG.  10    inwards. Notice that the valve itself is not shown in  FIG.  10 C  for simplicity, however, the lever can be used for both valve arrangements of  FIG.  10 A  and  FIG.  10 B . 
     REFERENCE NUMBERS 
       1  dispenser 
       2  top of container  5   
       3  bottom of container  5   
       4  side walls of container  5   
       4 ′ foremost side wall 
       5  container 
       6  inner volume of container  5   
       7  top insert 
       8  water filter 
       9  filter compartment 
       10  dirt water receptacle 
       11  filter exit 
       12  clean water tank 
       13  water outlet 
       14  valve arrangement 
       15  outlet channel 
       15 A upstream end of channel 
       15 B downstream end of channel 
       16  platform 
       17  pre-moulded frame 
       17 A snap protrusion of frame  17  (optional) 
       17 B upper edge of frame  17  for facilitating manual operation of the valve 
       17 C opening in pre-moulded frame  17  for cooperation with protrusion  21 C 
       18  profile above channel 
       19  valve member 
       19 A cylindrical part of valve member  19   
       19 B bulb-formed gasket part of valve member  19   
       19 C notch of valve member  19   
       20  lever 
       20 A first end of lever  20   
       20 B second end of lever  20   
       20 C integrated spring in lever  20   
       20 D Central joint of lever  20   
       21  hinge profile of lever  20   
       21 A edge of hinge profile 
       21 B arm of hinge profile 
       21 C protrusion of hinge profile 
       22  helical coil spring 
       23  protrusion to form snap holder in cooperation with the edge  21 A of the hinge 
       24  magnet 
       25  retainer for valve member  19   
       25 A top protrusion of retainer  25   
       26  arrow illustrating manual push action 
       27  arrow illustrating water flow 
       28  holding point 
       28 A dead point line 
       29  cover for frame  18   
       29 A slit in cover  29  for easy mounting 
       29 B upper edge of cover for easing manual pressure 
       30  holding spring 
       31  valve stem 
       32  valve insert unit 
       33  gasket between valve insert unit  32  and foremost side wall  4 ′ 
       34  separate valve 
       34 A O-ring of separate valve  34   
       34 B valve spring 
       34 C head of valve  34