Abstract: A flush toilet apparatus includes a tank and a jet pump unit. A throat pipe of the jet pump unit includes a linear portion formed to linearly extend obliquely upward from a suction port that is an inlet of water. The suction port is formed so that the entire edge is along a horizontal surface.

Abstract: Air suction device for a flush toilet configured to suction air from a toilet drain duct having a suction chamber dividing a tank body interior, a float in the suction chamber and an on-off valve closing an air inlet when the float lifts to prevent air flow from the toilet drain duct side into the suction chamber. The air inlet is higher than the water level in a toilet flushing standby mode. The on-off valve opens the air inlet to allow air flow form the drain duct side in the suction chamber when flush water in the tank drops such that the float is lowered form the raised position. An embodiment includes a valve chest, a float and attracting member for on-off valve manipulation. Another embodiment includes a valve chest with a small air flow manipulation hole.

Abstract: A method of enhancing the negative pressure of siphon of toilet is to suck the air between the two traps to enhance the negative pressure between the two seal-water, so as to rapidly form a siphon in the traps and flush the waste out rapidly. A suction device for enhancing the negative pressure of siphon of a toilet is used. It comprises: a water container installed in the water tank, said water container is provided with a water inlet and outlet; an air container with an opening in the bottom installed inside the water container, the lower portion of the side wall of the air container has a water opening connected to the water container; and a connecting tube, the bottom of which is connected to the trapway of the toilet, and the top is connected to the top of the air container.

Abstract: A method of enhancing the negative pressure of siphon of toilet is to suck the air between the two traps to enhance the negative pressure between the two seal-water, so as to rapidly form a siphon in the traps and flush the waste out rapidly. A suction device for enhancing the negative pressure of siphon of a toilet is used. It comprises: a water container installed in the water tank, said water container is provided with a water inlet and outlet; an air container with an opening in the bottom installed inside the water container, the lower portion of the side wall of the air container has a water opening connected to the water container; and a connecting tube, the bottom of which is connected to the trapway of the toilet, and the top is connected to the top of the air container.

Abstract: A toilet flushing method causes high-pressure flush water, provided by a flow pipe, to spray along the baffle in the bottom of the trap of a toilet bowl and causes the flush water used for washing the toilet bowl to spray into the toilet bowl. The high-pressure flush water discharges the egesta with water in order to supply sealing water to the trap. A toilet, which uses components for improving the prior art toilet, carries out the flushing method.

Abstract: A water closet having a trap drainage exit in a wall above a floor, in which at the time of flushing, a vent space is partitioned in a wall-like manner by water falling from a weir. A rise in the water level of a sump portion of the trap results, and air within the trap is quickly forced toward the drainage exit side by the force of the water flow to cause the interior of the trap drainage to have a decreased pressure so that siphon action easily occurs. When the feed rate of water from a tank slows, to terminate the siphon action, air is promptly introduced into the siphon area from a notch in a partitioning wall, whereby the air introduction is hastened and the siphon effect is terminated quickly.

Abstract: A vacuum assisted toilet is described, of the type wherein the toilet bowl outlet has a lower trap that is open to the passage of air therethrough except during each flushing when a vacuum is applied, which uses the vacuum more effectively. A vacuum source (46, FIG. 3) includes a first container portion (107) that holds water between flushings, with the water released during a flushing and creating a vacuum in a second portion (106) of the container that is coupled through a vacuum conduit (48) to the toilet bowl outlet. Instead of constantly coupling the second portion of the container to the bowl outlet, the second portion of the container is allowed to progressively expand but remain substantially unconnected to the bowl outlet until a predetermined amount of expansion (to 108) when the second portion is suddenly connected through the vacuum conduit (48) to the bowl outlet.

Abstract: A toilet flushing apparatus characterized by a closed primer tank and an inherently leakproof syphon discharge through a toilet flush tube, also characterized by a pre-primed syphon, wherein the discharge leg is filled to the syphon bridge and the suction leg can be filled to a level substantially below the bridge, and with a releasable floating flush valve and means for retarding discharge of primer tank water to initiate syphoning, the primer tank being automatically refilled with the rise of float controlled supply tank water.

Abstract: A toilet flushing apparatus characterized by an inherently leakproof syphon discharge through a toilet flush tube, characterized by a pre-primed syphon wherein both the suction leg and the discharge leg are filled with supply and primer tank water, and with a floating flush valve for complete discharge of primer tank water to initiate syphoning, the primer tank being automatically refilled with the rise of float controlled supply tank water, only one primer tank-full of water may be lost.

Abstract: A toilet flushing apparatus characterized by an inherently leakproof syphon discharge through a toilet flush tube, control being of two forms (1) a pre-primed syphon wherein both the suction leg and the discharge leg are filled with water, and (2) a jet primed syphon wherein the suction leg is filled with supply tank water and the discharge leg is dry and with a floating flush valve for complete discharge of primer water followed by immediate closure to ensure continued syphoning, there being a primer tank automatically refilled with the rise of float controlled supply tank water; only primer tank water may be lost.

Abstract: A toilet flushing apparatus characterized by an inherently leakproof syphon discharge through a toilet flush tube, characterized by a jet primed syphon wherein the suction leg is filled with supply tank water and the discharge leg is dry and with a floating flush valve for complete discharge of primer water followed by immediate closure to ensure continued syphoning, there being a primer tank automatically refilled with the rise of float controlled supply tank water; only one primer tankful of water may be lost.

Abstract: A water closet having a trap drainage exit in a wall above a floor, in which at the time of flushing, a vent space is partitioned in a wall-like manner by water falling from a weir. A rise in the water level of a sump portion of the trap results, and air within the trap is quickly forced toward the drainage exit side by the force of the water flow to cause the interior of the trap drainage to have a decreased pressure so that siphon action easily occurs. When the feed rate of water from a tank slows, to terminate the siphon action, air is promptly introduced into the siphon area from a notch in a partitioning wall, whereby the air introduction is hastened and the siphon effect is terminated quickly.

Abstract: An automatic flushing system for use with toilets or urinals which includes a tank having a siphon outlet and a hollow float which has a water access port and an air access port. There is also provided support means for supporting the float for generally vertical movement within the tank. There is also provided a tank inlet and tank inlet valve means which is operated by the support means for controlling flow of water through the tank inlet. There is also provided air access port valve means for controlling flow of air into the float. The support means is suitably characterized to enable the float to reach the intermediate holding level which is lower than the maximum level within the tank. The air access port valve means may also control flow of air through the air access port in such a manner as to provide a water seal associated therewith and a gas lock in the hollow float.

Abstract: A flush valve for a toilet having a tank and a bowl including a valve housing connected to a source of water, a valve stem operatively connected to a float and a piston operatively connected through a cam to a flush lever, the valve stem and piston movable independently to provide a valve for the admission of water to the tank and bowl together with a syphon having a tube therein for breaking the syphon action at a predetermined level of water in the tank, a float operatively connected to the valve stem which automatically varies the float level action and an arm connected to the cam for actuation by the float to return the flush lever to an inoperative position and another valve operated by the piston to interrupt the flow of water into the valve housing to prevent back syphonage of tank water into the water supply line.

Abstract: A water reservoir tank storing a primary body of water for release to a toilet bowl for flushing is associated with a pressure tank that stores a minor amount of water at a pressure considerably higher than that of the primary body and is discharged during flushing to join the water released from the reservoir tank and impart increased overall energy to the water in the bowl. A predetermined time delay is introduced between start of the flushing action and discharge of water from the pressure tank. The pressure tank is automatically discharged and recharged during each flushing cycle.

Abstract: A water reservoir tank storing a primary body of water for release to a toilet bowl for flushing houses a pressure tank that stores a minor amount of water at a pressure considerably higher than that of the primary body and is discharged during flushing to join the water released from the reservoir tank and impart increased overall energy to the water in the bowl. The pressure tank is automatically discharged and recharged during each flushing cycle.

Abstract: Disclosed herein is a ballcock type flush valve that has all moving parts above the water line of the tank, thereby eliminating corrosion. The valve configuration is such that it is designed to shut-off the flow of water, thereby providing a positive shut-off, and further it is unique in that it has no seat or seal to leak that is below the water line. Fail safe features include a flush mechanism that will remain inoperative until the tank has regenerated its water supply, thereby providing a full flush. Anti-syphon means are included in addition to prevent back flow of bowl water into the water system. The ballcock flush valve combination is so constructed that ingress of additional water due to a faulty seal is impossible thereby conserving water.