Abstract:
The present invention relates to a double trip handle type flush control assembly, which operates to allow either a full volume of water to be drawn out of the toilet tank or a partial volume of water to be drawn out of the tank. In particular, the double trip handle type flush control assembly of the present invention is adaptable for use in any size toilet tank. Further, the flush control assembly of the present invention has been adapted to accommodate a refill tube, which directs water from a ball cock valve into an overflow tube to refill the toilet trapway after flushing.

Description:
FIELD OF THE INVENTION  
         [0001]    The present invention relates generally to a toilet flushing mechanism that allows a user to chose between a partial flush and a full flush. In particular, the present invention relates to a dual flushing assembly having two concentric handles operable to either partially or fully flush a toilet.  
         BACKGROUND OF THE INVENTION  
         [0002]    Water conservation is becoming increasing more important. A significant source of water consumption is the water used in flushing toilets. As is well known in the art, several problems and difficulties are encountered in providing suitable means for flushing controlled amounts of water from a toilet water tank.  
           [0003]    One of the most common flushing apparatuses in use today utilizes a ball cock supply valve that controls the inlet of water into the toilet tank. A buoyant float ball is connected to the ball cock by means of a trip lever and as the toilet tank is filled with water, the buoyant ball rises. The upward motion of the buoyant ball is transmitted to the ball cock supply valve through the trip lever until, at a predetermined water level, the ball cock shuts off the water inlet to the toilet tank. In most toilets, the water level in the tank may be adjusted by means of a screw-set mechanism located in the ball cock supply valve. Once the water level in the tank is set, further adjustment is not required and a consistent volume of water will be discharged each time the toilet is flushed.  
           [0004]    In addition to the ball cock supply valve, a second valve means is needed for controlling the flushing of the toilet, namely a flush valve. Typically the flush valve comprises a flapper that seals water into the toilet tank. When the trip lever or handle on the outside of the toilet tank is depressed to initiates the flush of the toilet, the trip lever activities a trip arm to lift the flapper and allow water to exit the tank into the toilet bowl for the flush cycle.  
           [0005]    Finally, a tank refill tube is commonly integrated with the water supply valve and the flush valve to ensure that the toilet trapway refills with water after the flush is completed.  
           [0006]    A flush valve mechanism for controlling the flushing action of water through the water outlet of a toilet tank is taught in U.S. Pat. No. 4,305,163. The valve taught in U.S. Pat. No. 4,305,163 is a dual activity flush valve having a float assist, the operation of which permits the complete drainage of the water in the tank for a full flush. The flush valve operates by means of a pair of lever arms whereby one arm operates to lift up a vertical tube for limited flushing and the other arm operates to lift both the vertical tube and an ancillary float assist that extends the opening time of the valve until the entire water volume is depleted. Such a valve system is manufactured by Plasson Maagan Michael Industries Ltd. (“Plasson”).  
           [0007]    The present invention provides a dual flushing assembly comprising dual handles for use with currently available components such as conventional ball cock supply valves and flushing valves as taught in U.S. Pat. No. 4,305,163 and manufactured by Plasson. Thus, when one wishes to flush only liquid waste, one of the dual handles will be responsible for a partial flush and when one wishes to flush both solid and liquid waste, a second handle will operate to effect a full flush.  
         SUMMARY OF THE INVENTION  
         [0008]    The present invention has been accomplished to provide a double trip handle type flush control assembly, which operates to allow either a full volume of water to be drawn out of the toilet tank or a partial volume of water to be drawn out of the tank. In particular, the double trip handle type flush control assembly of the present invention is adaptable for use in any size toilet tank. Further, the flush control assembly of the present invention has been adapted to accommodate a refill tube, which directs water from the ball cock valve into an overflow tube to refill the toilet trapway after flushing.  
           [0009]    The present invention provides a dual flushing apparatus, mountable through an aperture in a wall of a toilet tank, for use with a dual flushing valve assembly comprising a vertical tube having a first float means attached thereto and a float assist arm having a second float attached thereto, said flushing apparatus comprising:  
           [0010]    a rotatable first handle means comprising a first handle and a first shaft having an annulus therethrough;  
           [0011]    a rotatable second handle means comprising a second handle and a second shaft, said second shaft adapted to be slideably received in said annulus of said first shaft such that the second handle nests with the first handle;  
           [0012]    a first flush lever arm have two ends, a first end operably attached to said first shaft and a second end operably attached to said float assist arm; and  
           [0013]    a second flush lever arm having two ends, a first end operably attached to said second shaft and a second end operably attached to said vertical tube, said second end further having a bore therethrough and a nipple member in communication with said bore for attaching a refill tube such that when said second flush lever arm is operably attached to said vertical tube, said bore is directly over said vertical tube;  
           [0014]    whereby said first flush lever arm supports said second flush lever arm such that when said second handle is depressed only said vertical tube is lifted for a partial flush but when said first handle is depressed both said vertical tube and said assist arm are lifted for a full flush.  
           [0015]    In a preferred embodiment, the first flush lever and the second flush lever arm are adjustable in length so as to fit in any size toilet tank.  
           [0016]    In another preferred embodiment, the first flush lever arm further comprises a first arm portion and a second arm portion, whereby each arm portions have male ends, and the second flush lever arm further comprises a first arm portion and a second arm portion, each arm portions having male ends. The male ends of the first and second arm portions of the first flush lever arm are interconnected by means of a first tube. The male ends of the first and second arm portions of said second flush lever arm are also interconnected by means of a second tube. The first and second tubes can be made in a variety of lengths, or can be of one length that can be cut to adapt to a particular size toilet tank.  
           [0017]    In another preferred embodiment, the present invention provides a dual flushing apparatus comprising:  
           [0018]    a rotatable first handle means comprising a first handle and a first shaft having an annulus therethrough;  
           [0019]    a rotatable second handle means comprising a second handle and a second shaft, said second shaft adapted to be slideably received in said annulus of said first shaft such that the second handle nests with the first handle;  
           [0020]    means for securing said second handle means to said first handle means;  
           [0021]    a first flush lever arm operably attached to said first shaft, said first flush lever arm having a first arm portion and a second arm portion and each arm portion having an annulus therethrough;  
           [0022]    a second flush lever arm operably attached to said second shaft, said second flush lever arm having a first arm portion and a second arm portion, each arm portion having an annulus therethrough;  
           [0023]    a first rod member for insertion into said annulus of said first and second arm portions of said first flush lever arm to interconnect said first and second arm portions; and  
           [0024]    a second rod member for insertion into said annulus of said first and second arm portions of said second flush lever arm to interconnect said first and second arm portions.  
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0025]    [0025]FIG. 1 shows the dual flushing apparatus of the present invention installed in a toilet tank.  
         [0026]    [0026]FIG. 2 a  is a perspective view of the dual flushing apparatus of the present invention.  
         [0027]    [0027]FIG. 2 b  is a side view of the dual flushing apparatus of the present invention.  
         [0028]    [0028]FIG. 3 shows a perspective of the individual parts of the dual flushing apparatus and how they fit together.  
         [0029]    [0029]FIG. 4 a  is a perspective view of the dual flushing apparatus of the present invention showing the adjustable flush lever arms.  
         [0030]    [0030]FIG. 4 b  is a side view of the dual flushing apparatus of the present invention showing the adjustable flush lever arms. 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0031]    In FIG. 1, an embodiment of the dual flushing assembly  10  of the present invention has been installed through a mounting hole  12  in a wall  14  of a toilet tank  16 . In addition to the dual flushing assembly  10 , the toilet tank  16  comprises a ball cock valve assembly  18 , a dual acting flush valve assembly  22  and a refill tube  20 , wherein one end of refill tube  20  is attached to ball cock valve assembly  18  and the other end is attached to flush valve assembly  22 . The dual acting flush valve assembly  22  is preferably constructed of a thermoplastic material and manufactured by Plasson.  
         [0032]    Dual acting flush valve assembly  22  is used in place of conventional flush valves such as a flapper valve or ball type valve because it has been designed to either partially or fully release water from the tank into the toilet bowl, as the need arises. Dual acting flush valve assembly  22  comprises a water outlet valve  24  and a buoyant valve engaging assembly which assembly comprises a float assist  28  attached to one end of a float assist arm  30 . Float assist arm  30  further comprises a ring  40  attached to the opposite end from float assist  28 . Float assist arm  30  operates to release float assist  28 .  
         [0033]    Water outlet valve  24  comprises vertical tube  25  having a toilet mounting means  70  at one end for mounting said dual flush valve assembly  22  to water outlet  34 . Vertical tube  25  further comprises a flushing valve seal  100 , which seals the water outlet valve when water outlet valve is not in the lifted position. When vertical tube  25  of the water outlet valve  24  is lifted, flushing valve seal  100  is also lifted thereby releasing water through water outlet  34  into the toilet bowl (not shown).  
         [0034]    Vertical tube  25  further comprises an aperture  38  at the opposite end and a partial float  26 . In operation, dual acting flush valve assembly  22  releases a full tank of water when both the float assist arm  30  and vertical tube  25  are simultaneously lifted. However, when vertical tube  25  is lifted alone, only a partial amount of water is released from the tank. Dual acting flush valve assembly  22  is described in more detail in U.S. Pat. No. 4,305,163, incorporated herein by reference.  
         [0035]    To ensure that the toilet trapway is refilled after flushing, refill tube  20 , having first end  102  and second end  104  is provided. First end  102  is connected to ball cock valve assembly  18 , which supplies water to refill tube  20 . Second end  104  of refill tube  20  is posited directly over flush valve assembly  22  for supplying water through vertical tube  25  and water outlet  34 .  
         [0036]    Dual flushing assembly  10  of the present invention has been adapted to be used with such dual acting flushing valve assemblies as shown in FIG. 1. One embodiment of dual flushing assembly  10  is illustrated in FIGS. 2 a  and  2   b.  FIG. 3 provides details of the interconnection of the various components of dual flushing assembly  10 . A rotatable first handle means  42  is provided, said first handle means  42  comprising a handle  72  (“first handle”) having a hollow shaft  76  (“first shaft”) at one end. End  78  of shaft  76  comprises a plurality of splines  80  arranged for mating with the correspondingly shaped hub  82  of first flush lever arm  46 . This ensures proper orientation of said first lever arm  46  relative to first handle means  42 .  
         [0037]    A rotatable second handle means  44 , having a handle  84  (“second handle”) and a shaft  86  (“second shaft”), said shaft  86  located at one end of said handle  84 , is shown in FIGS. 2 a  and  2   b  with second shaft being inserted into first shaft such that second shaft is free to rotate concentrically within first shaft. Thus, second handle is resting on first handle to give the appearance of a single handle.  
         [0038]    Shaft  86  further comprises a plurality of splines  88  at end  90  of shaft  86 , said splines  88  being discontinuous across the length of end  90  because of depressed ridge  92 , said ridge  92  being continuous around the circumference of shaft  86 . Splines  88  are arranged for mating with the correspondingly shaped hub  94  of second flush lever arm  48 .  
         [0039]    [0039]FIGS. 2 a  and  2   b  show second handle means  44  nested within first handle means  42 . Retainer means  50  fittingly attaches to ridge  92  and is designed to ensure that first and second handle means remain nested. Retainer means  50  is shown in FIG. 3 as a simple clip, which clips over ridge  92 .  
         [0040]    First flush lever arm  46  further comprises end  52  adapted to be mounted into ring  40  of float assist arm  30  as shown in FIG. 1. First flush lever arm  46  is bent such that it is positioned beneath second flush lever arm  48 . Second flush lever arm  48  further comprises end  54  adapted to penetrate aperture  38  of vertical tube  25  of water outlet valve  24  as shown in FIG. 1.  
         [0041]    Second flush lever arm  48  further comprises a bore  98  therethrough and nipple  96 , said nipple adapted to snugly receive refill tube  20  as shown in FIG. 1. As previously mentioned, first end  102  of refill tube  20  is connected to ball cock valve assembly  18  and second end  104  of refill tube  20  is posited directly over the vertical tube  25  of dual acting flush valve assembly  22  for supplying water through vertical tube  25  and water outlet  34 . In the prior art, the refill tube had an elbow tube connected at its end, and said elbow tube simply hooked to the lip of the vertical tube of a dual acting flush valve assembly. However, such an attachment means of the refill tube to the vertical tube proved to be unsatisfactory as the refill tube was constantly being “knocked off” the lip of the vertical tube. As well, the movement of the vertical tube of the dual flush valve assembly, in response to the movement of the second flush lever arm is partially restricted due to the pull or drag of the elbow tube on the refill tube.  
         [0042]    In the present invention, second end  104  of refill tube  20  snugly attaches on to nipple  96  located at end  54  of second flush lever arm  48  such when end  54  penetrates aperture  38  of vertical tube  25 , bore  98  and nipple  96  are located directly over the opening  106  of vertical tube  25 . Once bore  98  and nipple  96  are positioned directly over opening  106 , refill tube  20  can be fitted thereon to supply water through vertical tube  25  and through water outlet  34  in order to refill the toilet trapway (not shown) once flushing has occurred. Thus, by snugly fitting the refill tube  20  on second flush lever arm  48 , refill tube  20  will be less likely to be knocked off, and will always be positioned directly above the vertical tube. Further, by being positioned on the second flush lever arm  48 , there is no drag or pull on vertical tube  25 .  
         [0043]    In a preferred embodiment first and second flush lever arms  46  and  48  are adjustable in length. Such adjustability is desirable due to the variety of different tank sizes and shapes on the market today. Adjustability is achieved in a preferred embodiment as follows.  
         [0044]    With reference now to FIGS. 4 a  and  4   b,  first flush lever arm  46  is comprised of two separate sections  58  and  60 , each having male ends  66  and  67 , respectively. Tube  36 , which can be made in any length, or, in the alternative, can be cut to any length, snugly fits over male ends  66 ,  67  of sections  58  and  60 , thereby connecting the two sections  58  and  60  to form a contiguous arm. Similarly, second flush lever arm  48  is comprised of two separate sections  62  and  64 , each having male ends  68  and  69 , respectively. Tube  56 , which again can be made in any length or cut to any length, snugly fits over male ends  68 ,  69  of sections  62  and  64  to form a contiguous arm.  
         [0045]    In an alternative embodiment (not shown), each arm section could have an annulus partially therethrough and a dowel could be inserted into each annulus to form a contiguous arm.  
         [0046]    With reference again to FIG. 1, the dual flushing assembly of the present invention operates as follows. When the handle  84  of second handle means  44  is depressed, second flush lever arm  48  is lifted, which in turn lifts vertical tube  25  of water outlet valve  24  and flushing valve seal  100  thereby releasing water through water outlet  34  into toilet bowl (not shown). However, partial float  26  is positioned on vertical tube  25  such that the water outlet valve  24  will close water outlet  34  when only part of the water in the tank  14  is released. This results in only a partial flush. In a preferred embodiment, partial float  26  can be adjustable along the length of vertical tube  25  to control the amount of water released during partial flushing.  
         [0047]    When handle  72  of first handle means  42  is depressed, first flush lever arm  46  is lifted, which in turn lifts both second flush lever arm  48  and float assist arm  30 . Second flush lever arm  48  in turn lifts vertical tube  25  as described above. Float assist arm  30  in turn releases float assist  28 . When float assist  28  is released, it operates to keep the vertical tube  25  in the lifted position for a longer period of time. Hence, water outlet valve  24  will remain in the lifted position longer thereby allowing all of the water in the tank  14  to be released through water outlet  34  into toilet bowl (not shown). This results in a full flush.  
         [0048]    While various embodiments in accordance with the present invention have been shown and described, it is understood that the same is not limited thereto, but is susceptible to numerous changes and modifications as known to those skilled in the art, and therefore the present invention is not to be limited to the details shown and described herein, but is intended to cover all such changes and modifications as are encompassed by the scope of the appended claims.