Baths – closets – sinks – and spittoons – Flush closet – Tank only
Patent
1991-02-25
1992-12-15
Recla, Henry J.
Baths, closets, sinks, and spittoons
Flush closet
Tank only
4300, 4329, 4332, 4421, 4428, E03D 106, E03D 1102
Patent
active
051705150
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a water closet having a drain hole above a floor.
DESCRIPTION OF THE BACKGROUND AND RELEVANT INFORMATION
A one-piece closet of a low silhouette type is known (for example, see Japanese Utility Model Application Laid-Open No. 106584/1986).
In a water closet of this kind, the height dimension of a flushing tank is adjusted to a closet body as much as possible so as to provide a united impression.
Therefore, sufficient water head cannot be obtained, and the feed water momentary flow rate which is a great factor in controlling the flushing function of a closet is extremely low as compared with that of a closet of the type in which the flushing tank is mounted on the closet body and a closet of the type in which a flush valve is used as a feed device.
Generally, a closet of a wall drain type has a a drain hole set to 100 to 150 mm from a floor surface in terms of execution of a closet and a function of a closet. However, when a one-piece closet of the low silhouette type employs the wall drain type to secure the aforesaid drain hole height, the head from the water surface of a bowl portion to the drain hole decreases and a satisfactory function cannot be achieved with the aforementioned poor condition being present. Therefore, no one-piece closet of the wall drain type has been present in commerce so far.
On the other hand, since a water closet of a one-piece type is considered as a luxury closet, this one-piece type closet has been desired to be installed in luxury mansions, suite rooms in luxury hotels, and the like.
However, in hotels, mansions and the like, ceiling beams often obstruct drain pipes, and in case of high buildings or the like, the ceiling height is often obtained by removal of piping space in the ceiling. Therefore, the conventional one-piece type water closet which employs the floor drain type wherein drain pipes need be installed under the floor cannot satisfy the above-described demand of the market.
SUMMARY OF THE INVENTION
The problem to be solved by the present invention is that a trap drainage is made by a new construction in which a siphon tends to occur and a powerful siphon force is obtained, thereby making it possible to provide a wall drain for a one-piece type water closet.
According to the technical means provided by the present invention to solve the aforementioned problem, a drain hole of a trap drainage is formed continuously with a bowl portion of a closet body. The trap drainage has a sump portion downstream of a weir portion and has partly constricted a diameter of the trap drainage between the weir portion. A sump portion, and a partitioning wall is suspended on an upper wall of said sump portion leaving a slight vent space between the upper wall and a water surface of the sump portion and the partitioning wall being provided with a notch.
With the above-described arrangement, according to the aforesaid technical means of the present invention, at the time of flushing, the vent space is partitioned in a wall-like manner by water falling from the weir portion and a rise in a water level of the sump portion occurs. The air within the trap is promptly forced toward the drain hole by the power of the water flow so that the pressure in the trap drainage becomes a pressure less than atmospheric pressure. In other words, splashing of the water, falling over the weir and into the sump, causes entrainment of some of the air with the water, and the subsequent discharge of the water with the entrained air, through the exit, causes low atmospheric pressure within the trap drainage, which results in a siphon action.
Accordingly, a siphon effect tends to occur.
Further, when feed from the tank terminates, to thus terminate the duration of the siphon effect, air is immediately introduced from the notch of the partitioning wall, and therefore, timing of air introduction becomes accelerated to promptly end the siphon effect. In other words, at the end of the flush cycle, air is introduced into the trap drainage, and this result
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patent: 3224013 (1965-12-01), Tubbs
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patent: 4159550 (1979-07-01), Tobin, Jr.
Kai Yoshio
Yoneda Toshifumi
Kupferschmid Keith
Recla Henry J.
Toto Ltd.
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