Flush apparatus

Claim 2

Flush apparatus comprising a bowl having an outlet at the bottom and an inner wall with an inner surface converging to said outlet, said wall defining in its upper portion a spiral ledge which extends in a direction around the interior of the bowl and which has a downward slope, and liquid-injection means mounted adjacent to the upper end of said ledge for introducing flush liquid onto the ledge for flow in a direction around the bowl so as to provide a vortex pattern of flow on the converging surface of the bowl when the water spills inward from said ledge.

Claim 3

Flush apparatus as is defined in claim 1, wherein said spiral ledge has at least one full convolution around the interior of the bowl.

Claim 4

Flush apparatus as is defined in claim 1, wherein said spiral ledge has an inward slant.

Claim 5

Flush apparatus as is defined in claim 1, wherein said spiral ledge has its maximum width at its upper end and becomes narrower in width progressively toward its lower end where it merges into said surface.

Claim 6

Flush apparatus as is defined in claim 1, wherein the inner edge of said ledge is rounded to facilitate spill of flush liquid from the ledge onto the converging surface of said wall.

Claim 7

Flush apparatus as is defined in claim 1, wherein said liquid-injection means comprises an injection tube in longitudinal alignment with the upper end of said ledge and opening in a direction to discharge liquid onto said ledge toward the lower end thereof.

Claim 8

Flush apparatus as is defined in claim 1, wherein said wall defines an overflow chamber adjacent to the upper end of said ledge, and a trap tube is mounted in communication with the interior of said overflow chamber and the outlet of said bowl.

Claim 9

Flush apparatus as is defined in claim 7, wherein said liquid-injection means comprises an injection tube in longitudinal alignment with the upper end of said ledge and opening in a direction to discharge liquid onto said ledge, said injection tube extending across said overflow chamber and having an aperture for discharging a limited quantity of liquid into said chamber each time liquid flows through said injection tube.

Claim 10

Flush apparatus comprising a bowl having an outlet at the bottom and an inner surface converging to said outlet, said bowl defining in its upper portion an inwardly facing spiral ledge, said ledge having a downward slope and an inward slant to facilitate flow of a flush liquid around the bowl and onto the converging surface of the bowl, said ledge having relatively greater width at its upper end merging into said converging surface at its lower end, and means mounted adjacent to the upper end of the ledge for introducing flush liquid thereon for flow toward the lower end thereof.

Claim 11

Flush apparatus comprising a bowl having an outlet at the bottom and an inner surface converging to said outlet, said bowl defining in its upper portion an inwardly facing spiral ledge, said ledge having a downward slope and an inward slant to facilitate flow of a flush liquid around the bowl and onto the converging surface of the bowl, said ledge having relatively greater width at its upper end merging into said converging surface at its lower end, and means mounted adjacent to the upper end of the ledge for introducing flush liquid thereon for flow toward the lower end thereof.

Claim 12

Flush apparatus as is defined in claim 9, wherein the inner edge of said ledge is rounded to facilitate spill of the flush liquid onto said converging surface.

Claim 13

A toilet comprising a bowl having an outlet at the bottom and an inner surface converging to said outlet, said bowl defining in its upper portion an overflow chamber and an inwardly facing spiral ledge, the upper end of said ledge being located adjacent to said overflow chamber, said ledge having downward slope and an inward slant to facilitate flow of a flush liquid around the bowl and onto the converging surface of the bowl, said ledge having relatively greater width at its upper end merging into said converging surface at its lower end, a flush liquid injection tube mounted to extend across said overflow chamber and in alignment with the upper end of said ledge for discharging liquid thereon, said injection tube having an aperture in its wall located over said overflow chamber for discharging a limited quantity of liquid thereinto when liquid is injected through the tube onto said ledge, and a trap tube mounted in communication with said overflow chamber for receiving said limited quantIty of liquid and for receiving overflow liquids that may enter said chamber.

Claim 14

A toilet comprising a bowl having an outlet at the bottom and an inner surface converging to said outlet, said bowl defining in its upper portion an overflow chamber and an inwardly facing spiral ledge, the upper end of said ledge being located adjacent to said overflow chamber, said ledge having downward slope and an inward slant to facilitate flow of a flush liquid around the bowl and onto the converging surface of the bowl, said ledge having relatively greater width at its upper end merging into said converging surface at its lower end, a flush liquid injection tube mounted to extend across said overflow chamber and in alignment with the upper end of said ledge for discharging liquid thereon, said injection tube having an aperture in its wall located over said overflow chamber for discharging a limited quantity of liquid thereinto when liquid is injected through the tube onto said ledge, and a trap tube mounted in communication with said overflow chamber for receiving said limited quantIty of liquid and for receiving overflow liquids that may enter said chamber.

Claim 15

A toilet as is defined in claim 11, wherein said trap tube has a discharge outlet in communication with the outlet of said bowl.

Claim 16

A toilet as is defined in claim 11, wherein an annular cover ring is mounted on said bowl to overlie said spiral ledge.