Abstract:
A toilet bowl in combination with a pressurized flush tank is presented wherein the pressurized tank has a spring, a float piston, a water inlet control valve set, a water discharge control unit and a container lid. The water inlet control valve set includes a valve unit, a valve cover, a small spring, a control piston, a seal ring, a float and a control wire. The water discharge control unit has a control handle, a link bar, a seal ring, two link bar fixing seats, a seal cap and a set of discharge fixing ring. When water is discharged, the compressed spring applies a force to the float piston so that the float piston will exert pressure on water which rushes into a toilet bowl as a result.

Description:
BACKGROUND OF THE INVENTION 
     The present invention relates to an improved toilet bowl in combination with a pressurized flush tank. The pressurized tank is made up of a spring, a float piston, a water inlet control valve set, a water discharge control unit and a container lid. The water inlet control valve set includes a valve, a valve cover, a small spring, a control piston, a seal ring, a float base and a control cord. The water discharge control unit has a control handle, a link bar, a seal ring, two link bar fixing seats, a water stopper and a set of discharge fixing ring. When water is discharged, the compressed spring applies a force to the float piston so that the float piston will exert pressure on water which rushes into a toilet bowl as a result. 
     Referring to FIG. 1, a conventional toilet bowl  10  sectionally shown is provided with a plurality of flushing holes  11  defined on the top periphery of the bowl with slant flushing slopes  12  disposed inside thereof A water collection area  13  is disposed at the bottom of the toilet bowl  10 . A downwardly extending water discharge tunnel  14  is disposed at a rear section of the flushing slope  12  and communicates with the same water source of the flushing holes  11  at the top end thereof and is in communication with the water collection area  13  at the bottom end thereof. The front section of the water collection area  13  extends in connection to a goose neck shaped dumping pipe  15  which has a front stop section  16  at the front end thereof and a rear stop section  17  at the rear end thereof. When the water collection area  13  is full of water, foul odor in the dumping pipe  15  can be stopped from entering and a vacuum chamber  18  is defined at the upper space of the dumping pipe  15 . 
     Referring to FIG. 2, it shows the direction of water flow. When water flushes into the toilet bowl, it will be first discharged from the top of the bowl out of the flushing holes  11  and flushes down along the flushing slopes  12 , producing a turbulent whirlpool. At the same time, water flushes down from the water discharge tunnel  14  to permit the whirling water to be discharged out of the dumping pipe  15 . It will produce a siphon state in the vacuum chamber  18  so that waste in the toilet bowl can be sucked out of the same as a result of the siphon state. 
     There are some disadvantages associated with the prior toilet bowl given as below: 
     1. The water discharge tunnel  14  has a steep angle, almost a right angle, at the top end thereof, so, water flushing out of an outlet will become weak as a result of vast change of angle of the water flow. Thus, it takes more water to effectively flush waste in a toilet bowl out 
     2. The water collection area  13  remains less quantity of water in a very short period of time and then a reverse flow will be produced in the water collection area  13  by the water discharge tunnel  14 . As a result, waste or fowl odor in the dumping pipe  15  will be sucked back. It is not hygienic to most people. 
     SUMMARY OF THE INVENTION 
     The primary object of the present invention is to provide a toilet bowl in combination with a pressurized flush tank which is operated without any electrical power to get water pressurized to flush waste and water out of a toilet bowl whereby the flush tank can be reduced in size and water discharged from the tank is economically saved. 
     Another object of the present invention is to provide an improved toilet bowl in combination with a pressurized flush tank. The toilet bowl of the present invention is provided with a back flushing tunnel which can build up a siphon state on filth waste and water being discharged in a vacuum chamber with a siphon state produced simultaneously so that filth water and waste can be dumped out effectively with less water used. 
     One further object of the present invention is to provide an improved toilet bowl in combination with a pressurized flush tank. The toilet bowl has a smoother dumping path which has no sharp angles of its structure so that filthy water and waste can be more directly dumped with no whirlpool produced in the water collection area in use. It is more hygienic than a conventional one. 
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a sectional diagram showing the operation mode of the present invention; 
     FIG. 2 is another sectional diagram showing the operation mode thereof; 
     FIG. 3 is a perspective diagram showing the present invention; 
     FIG. 4 is a perspective diagram showing exploded components of a pressurized flush tank; 
     FIG. 5 is a sectional diagram showing the pressurized flush tank of the present invention; 
     FIG. 6 is a sectional diagram of an improved toilet bowl of the present invention; 
     FIG. 7 is a sectional diagram showing the pressurized tank full of water; 
     FIG. 8 is a sectional diagram showing the pressurized tank running out of water; 
     FIG. 9 is a diagram showing water being flushed in the toilet bowl. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring to FIG. 3, the toilet bowl in combination with a pressurized flush tank of the present invention includes a tank  2  which is connected to a toilet bowl  90  by a pipe  80 . The tank  2  comprises a tank embodiment  20 , a top lid  30 , a spring  40 , a float piston  50 , a water inlet control valve set  60  and a water outlet control valve set  70 , as shown in details in FIGS. 4,  5 . 
     The tank embodiment  20  of a long cylindrical form has a top peripheral flange having a reduced diameter. A pair of symmetric trapezoidal retaining blocks  21  project from the top peripheral flange. A pair of symmetric vertical slide tracks  22  are axially disposed on the inner wall on the upper portion of the cylindrical tank embodiment  20 . On the wall of the lower portion of the tank embodiment  20  and at two symmetric positions are disposed a pipe hole  23  and a shaft hole  24  and at the bottom plane is disposed a water outlet pipe hole  25 . 
     The top lid  30  has a vent  31  disposed adjacent the peripherally projected edge of a housing recess  32  for locating one end of a spring  40  and has a pair of trapezoidal locking blocks  33  symmetrically disposed on an inner peripheral edge thereof. 
     The float piston  50  has a pair of symmetrically disposed vertical grooves  51  on the periphery thereof, which are defined in correspondence to the vertical slide tracks  22  of the tank embodiment for slidable engagement in installation. On the top face of the float piston  50  are disposed two securing projections  52  for retaining the spring  40  in place and adjacent the bottom periphery of the float piston  50  is disposed a downwardly extended positioning plate  53 . On the bottom face of the float piston  50  is disposed a float receiving cavity  54 . 
     The water inlet control valve set  60  is made up of a valve unit  61 , a valve cap  62 , a spring  63 , a control piston  64 , a sealing ring  65 , a float  66  and a control wire  67 . The sealing ring  65  is engaged with the pipe hole  23  of the tank embodiment  20  so as to permit the valve unit  61  to stick out of the tank embodiment and connect to a water inlet pipe. The valve unit  61  has an internal receiving space  611  and a water outlet  612  on the wall thereof. A control piston  64  housed in the receiving space  611  of the valve unit  61  is provided with a discharge tunnel  641 . In the receiving space  611  and on the top surface of the control piston  64  is disposed a securing ring element  642 . The valve cap  62  is fixedly mounted to the top of the valve unit  61  with a wire bore  621  defined at the center thereof. At the bottom of the float  66  is disposed a retaining ring  661 . One end of the control wire  67  led through the wire bore  621  is secured to securing ring element  642  of the control piston  64  and the other end of the control wire  67  is fixed to the retaining ring  661  of the float  66 . 
     The water outlet control valve set  70  comprises a control handle  71 , a link bar  72 , a sealing ring  73 , a pair of link bar mounts  74 , a seal cap  75  and a discharge pipe head  76  fixed to the water outlet pipe hole  25  of the tank embodiment  20 . A pipe  80  is connected to the outlet pipe hole  25 . The two link bar mounts  74  fixed to the bottom of the tank embodiment  20  are respectively provided with a shaft hole  741 . A sealing element  73  is disposed at the shaft hole  24 . The link bar  72  is pivotal engaged with the two shaft holes  741  of the link bar mounts  74  and the sealing element  73 . The control handle  71  is secured to an externally exposed end of the link bar  72  by a screw. The seal cap  75  is removably fixed to the link bar  72  and is just in sealing engagement with the discharge pipe head  76 . 
     Thereby, the spring  40  is fixed to the two securing projections  52  of the top surface of the float piston  50 . Then the float piston  52  is slidably engaged with the vertical slide tracks  22  inside of the tank embodiment  20  by way of the vertical grooves  51  thereof. The top lid  30  is secured to the top of the tank embodiment  20  by rotation of the top lid  30  so that the retaining blocks  21  can be in locking engagement with the locking blocks  33 . At the same time, the spring  40  is just fitted in the housing recess  32  of the top lid  30 . 
     Referring to FIG. 6, the toilet bowl  90  of the present invention is sectionally shown. A water inlet path  91  is disposed at the top corner and periphery at the rear end of the toilet bowl  90  and on the periphery of the toile bowl  90  are defined a plurality of flush holes  92  communicating with water inlet path  91 . On the interior of the toilet bowl  90  are defined downwardly extended flushing slopes  93  and at the bottom of the toilet bowl  90  is disposed a water collection area  94 . A front water flushing passage  95  is defined behind one of the flushing slopes  93 . The front water flushing passage  95  is in communication with the water inlet path  91  at the top end and communicates with the water collection area  94  at the bottom end thereof. At a rear end of the water collection area  94  is disposed a goose-like waste discharge path  96  which is connected to a sewage tunnel. At the front end of the waste discharge path  96  is disposed a front stop edge  961  in smooth connection to one of the flushing slope  93  and at the rear end of the water collection area  94  is placed a rear stop edge  962 . 
     When water collection area  94  is filled up with water having a level reaching the edges of the front stop edge  961  and the rear stop edge  962 , foul odor produced in the waste discharge path  96  can be stopped from distributing into a room via the waste discharge path  96 . A vacuum chamber  97  is formed in the sharply curved area of the waste discharge path  96 . Communicating with the vacuum chamber  97  is a rear water flushing passage  98  which communicates with the water inlet path  91 . The front water flushing passage  95  having its outlet end in alignment with the opening of the goose like waste discharge path  96 . 
     Referring to FIGS.  7 , 8 , 9 , when the tank  20  is to be filled with water, i.e., it is empty then, the float piston  50  is being forced by the spring  40  to a proper position near the bottom of the tank  20 . At this time the float  66  is engaged with the float receiving cavity  54  on the underside of the float piston  50 , and the control wire  67  is in a loose state; as a result, the spring  63  in the valve unit  61  is downwardly extended and forces the control piston  64  to such a position that the discharge tunnel  641  of the control piston  64 , the water outlet  612  of the valve unit  61  and the water pipe in communication with the valve unit are in linear alignment. Thereby water can be delivered into the tank  20  accordingly. 
     As the control handle  71  is pressed down to get the toilet bowl flushed, the seal cap  75  is activated by the link bar  72  so as to get the discharge pipe head  76  opened for permitting water to be delivered out of the water inlet path  91  of the toilet bowl  90  via the pipe  80 . Then, the spring  40  has a larger force than the internal force of the valve unit  61 , so, the spring  40  will exert a downward force on the float piston  50  which will pressurize water to flow into the water inlet path  91  of the toilet bowl  90  and to flush out of the flush holes  92 . As a result, water will flush down along the flushing slopes  93  to produce a turbulent whirlpool and at the same time, the pressurized water will smoothly rush down the water flushing passage  95  and flow into the waste discharge path  96 . Simultaneously, a siphon state will be produced in the vacuum chamber  97  in the waste discharge path  96  accordingly and a water flow flushes down the rear water flushing passage  98 , resulting in building up of the siphon state in the vacuum chamber  97  of the waste discharge path  96  to effectively suck waste and filthy water out of the waste discharge path  96 . At then, the float  66  will move down to cause the control piston  64  to position in such a place that water can flow into the tank  20  via the valve unit  61 . The lifted seal cap  75  will be touched and forced to close by the positioning plate  53  extended downwardly from the float piston  50 . 
     As water continues pouring in with the level of water in the tank  20  going up, the float piston  50  lifts up, making the spring  40  compressed. During the period, the float  66  will be lifted up along with the raise of water level in the tank  20 . As long as the control wire  67  is not completely extended to its preset length, water will keep on flushing in the tank  20  until the float  66  moves to such a position that the control wire  67  is fully straightened up. As a result of the buoyancy of the float  66  larger than the force of the spring  63  disposed between the control piston  64  and the valve cap  62 , the control piston  64  is lifted up to a summit position to cut off the inlet of water via the discharge tunnel  641  into the tank  20 . Since the valve unit  61  and the control piston  64  are made of ceramic material that can be sealedly matched, no seal rings are needed, making the moving elements smoothly operated with ease. 
     In summary, the present invention has the following advantages in use: 
     1. Waste in toilet bowl can be flushed with economic amount of water. 
     2. It is effectively operated because of production of siphon states in a toilet bowl which can suck waste therein efficiently out of the toilet bowl. 
     3. The smoother flushing slopes in the toilet bowl make discharge of waste and filthy water out of toilet bowl fast without producing turbulent whirlpool therein.