Flush toilet with rim nozzles

Details Flush toilet with rim nozzles Flush toilet with rim nozzles

2000-08-16

2001-06-19

Eloshway, Charles R. (Department: 3751)

Baths, closets, sinks, and spittoons

Flush closet

Bowl

C004S421000, C004S432000

Reexamination Certificate

active

06247193

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a flush toilet. More particularly this invention concerns a flush toilet having a system for directing streams of water into the bowl from the bowl's rim.
BACKGROUND OF THE INVENTION
A standard flush toilet has a housing in which is set a bowl that is unitarily formed with a trap outlet. A nozzle ring is provided around the upwardly open mouth of the bowl to direct a plurality of streams of water straight down into the bowl. The incoming water causes the outlet to overflow and the resultant draining action, often augmented by a siphon effect, empties the bowl.
The nozzle ring is typically built into the cover or top part of the toilet and comprises an annular manifold passage fed at one location with water under pressure and having a plurality of outlets forming the nozzles. The nozzles furthest from the feed location are not in this system highly effective because they get little pressure, while those close to the feed location emit relatively powerful streams.
OBJECTS OF THE INVENTION
It is therefore an object of the present invention to provide an improved flush toilet.
Another object is the provision of such an improved flush toilet which overcomes the above-given disadvantages, that is which flushes uniformly and quietly while using a minimum of water.
SUMMARY OF THE INVENTION
A flush toilet has according to the invention a housing and a bowl set in the housing, having an upper rim, and having an inner surface extending downward from the rim. A ring atop the bowl has a plurality of nozzles spaced about the rim and each directed at an acute angle against an immediately adjacent portion of the inner bowl surface. Respective conduits have outer ends connected to the nozzles and inner ends. A supply feeds water under pressure to the inner ends and thereby directs streams of water from the nozzles against the inner surface.
According to further features of the invention the conduits are all of substantially the same length between their ends so that pressure at the nozzles is uniform. These conduits are at least partially formed by flexible tubes. In addition each nozzle has an oval-shaped outlet opening.
Each nozzle is directed at an acute angle of between 10° and 20° against the respective adjacent bowl portion and also at an angle of between 20° and 40° to vertical. Thus the nozzles create an angled swirling flow along the bowl surface.


REFERENCES:
patent: 270113 (1883-01-01), Pike
patent: 705319 (1902-07-01), Bush
patent: 2050152 (1936-08-01), Beam
patent: 2282636 (1942-05-01), Bennett
patent: 4404696 (1983-09-01), Heinze et al.
patent: 4559650 (1985-12-01), Pruckner
patent: 5692250 (1997-12-01), Oldfelt et al.
patent: 5909968 (1999-06-01), Olin et al.
patent: 43 19 304 (1993-11-01), None
patent: 4321559 A1 (1995-01-01), None
patent: 5-230863 (1993-09-01), None
patent: WO 99/27203 (1999-03-01), None

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