Abstract:
A toilet with a single handle can produce both light and heavy flushes as needed to conserve water. The handle can be lifted to produce one flush and depressed to produce the other. Separate levers attached to separated flush valves at different water levels are activated by the motion of the handle.

Description:
BACKGROUND OF THE INVENTION 
     This invention relates generally to the art of toilet flush systems and more particularly to dual-flush valve systems of the type through which two different flush volumes of water may be released in order to evacuate a toilet bowl. In an effort to conserve water many varible toilet flush systems have been developed, but very few have required only one handle for such flushes. 
     One such single handle for dual flushes is disclosed in U.S. Pat. No. 4,504,984. This patent discloses a single flush lever attached to two flush valves. A partial or full flush is effectuated by a partial or full depression of the handle, thus requiring the user to regulate the manual force he applies to the handle. 
     U.S. Pat. No. 4,175,295 describes a system whereby the user has the option of either rotating the handle in one direction for a light flush or the opposite direction for a heavy flush. But the positioning of a single internal lever is biased by a pair of springs which are subject to wear and stretching. 
     Other single handle, dual-flushing systems have been proven to be functionally unreliable and to require of the user a non-traditional means of flushing. 
     SUMMARY OF THE INVENTION 
     It is thus an object of this to provide a single handle, dual-flushing toilet. 
     It is a further object of this invention to provide a single handle, dual-flushing toilet with functional certainty based on the traditional flushing mechanism of each single flush lever attached to a single flush valve. 
     It is a still further and more particular object of this invention to provide a single handle, dual-flushing toilet with a first lever inside the tank to effectuate a full flush, a second lever inside the tank to effectuate a partial flush and a means by which the first lever acts on the second lever. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 of the drawings is a cross section view of the tank in accordance with this invention. 
     FIG. 2 of the drawings is a perspective view illustrating the handle and lever mechanisms of this invention. 
     FIG. 3 of the drawings is a breakaway view of the interaction between the levers in this invention. 
     FIG. 4 of the drawings is a view similar to FIG. 2 in a different mode of operation. 
     FIG. 5 of the drawings is a view similar to FIG. 3 and FIG. 4 in a different mode of operation. 
    
    
     DETAILED DESCRIPTION 
     In accordance with this invention it has been found that a single handle of a toilet can be depressed to cause one flush lever to rise and can be lifted to cause a second flush lever to rise. These two levers are connected to separate flush valves located at different water levels within the toilet tank. Thus, lifting the handle causes a flush of one degree and depressing the handle causes a flush of another degree. Various advantages and features will be apparent from the following description given with reference to the various figures of the drawings. 
     FIG. 1 illustrates a flush mechanism 1 in accordance with this invention. Flush valve 110 is located on the bottom of the tank while flush valve 120 is at a higher water level. Lever mechanism 1 is connected to valves 110 and 120. In the preferred embodiment, chain 130 connects lower flush valve 110 to lower lever 11 and chain 140 connects upper flush valve 120 to upper lever 9. Thus, the raising of lower lever 11 results in a full flush; while the raising of upper lever 9 results in a partial flush. 
     The operation of each lever 9 and 11 is best understood by reviewing the handle and lever mechanism 1 of this invention as shown in FIG. 2. A handle 3 is held to a pivot stator 5 by retaining nut 7. An upper lever 9 and a pivot stator 5 by a retaining nut 7. An upper lever 9 and a lower lever 11 fit onto the pivot stator 5 as shown. An actuator 13 fits into the upper lever 9 at its pivot point 15. This is best illustrated in FIG. 3, which shows the handle and lever mechanism 1 in the resting position. The actuator 13 covers both the pivot point 15 of the upper lever 9 and the pivot point 17 of of the lower lever 11. 
     FIG. 4 illustrates the handle and lever mechanism 1 with the handle 3 depressed. The upper lever 9 rises until it hits its &#34;up&#34; stop 19. The lower lever 11 is unaffected. 
     FIG. 5 illustrates the means by which a lifting of the handle 3 causes the rising of the lower lever 11. Lifting handle 3 lowers the upper lever 9 and rotates the actuator 13. A gear tooth 21 on the actuator moves against a gear tooth 23 on the lower lever 11 until the lower lever 11 hits its &#34;up&#34; stop 25. 
     Thus a depression of the handle causes the upper lever to rise. This upper lever is attached to a flush valve at one of two different water levels. A lifting of the handle causes the lower lever to rise. This lower lever is attached to the other valve. Either partial or full flush can be effectuated by depressing of lifting the handle depending on which lever is attached to which valve. In the preferred variation the upper lever is attached to the valve at a higher water level and the lower lever is attached to the valve at a lower water level. Thus, depression of the handle, the more traditional of the two flushing means effectuates a light flush and conserves water. Lifting of the handle effectuates a full flush. 
     It is apparent that the invention disclosed herein provides a means for effectuating a light or heavy flush of a toilet by either lifting or depressing the handle. As many variations will be apparent from a reading of the above description, such variations are embodied within the spirit and scope of this invention as defined by the following appended claims.