Anti-siphonic toilet
AssigneeKohler Co.
InventorsRobert S. Davis, Thomas M. Spankowski, Lachlan A. Stewart, III
Life of this patent
Estimating the term…
Abstract
A wash-down toilet including a bowl, a passageway, and a trapway. The bowl includes a sump. The passageway includes an inlet in fluid communication with the sump, an outlet provided at a height above the inlet, and a weir. The trapway includes an inlet, an outlet, and a vent, with the inlet of the trapway being in fluid communication with the outlet of the passageway and the outlet being in fluid communication with a soil pipe. The vent is configured to introduce a supply of air into the trapway during a flush cycle to prevent siphoning.
Claims21
A wash-down toilet, comprising:
- a bowl having a sump;
- a passageway having an inlet, an outlet provided at a height above the inlet, and a weir, the inlet being in fluid communication with the sump;
- a trapway having an inlet, an outlet, and a vent, the inlet of the trapway being in fluid communication with the outlet of the passageway, the outlet configured to be in fluid communication with a soil pipe;
- and
- a supply of air provided from an air supply to the trapway by way of the vent;
- wherein the vent introduces the supply of air into the trapway during a flush cycle to prevent siphoning;
- and
- wherein the vent is configured as a one-way vent that prevents fluid from entering the vent from the trapway.
A toilet configured to prevent siphoning during its flush cycle, comprising:
- a bowl having a sump;
- a passageway having an inlet in fluid communication with the sump, an outlet provided at a height above the inlet, and a weir provided at a height above the inlet between the inlet and outlet in the passageway;
- a trapway having an inlet portion in fluid communication with the outlet of the passageway, an outlet portion configured to be in fluid communication with a soil pipe, and a vent tube positioned between the inlet portion and the outlet portion the vent tube configured as a one-way vent that prevents fluid from entering the vent tube from the trapway;
- and
- a supply of air provided from an air supply to the trapway through the vent tube;
- wherein the supply of air is fed to the trapway during a flush cycle to prevent siphoning;
- and
- wherein the vent tube is provided above a centerline of a vertical cross-section of the inlet portion of the trapway.
A method for flushing a wash-down toilet, comprising:
- introducing a supply of water into a bowl of the toilet to move water and waste in a sump of the bowl through a passageway to a trapway of the toilet, the passageway including an inlet and an outlet, wherein the outlet is provided at a height that is above the inlet and is in fluid communication with the trapway;
- introducing a supply of air into the trapway through a vent to prevent a siphon when the water and waste flow through the trapway;
- passing the water, waste, and air from the trapway;
- and
- providing a remaining volume of water in the sump.
Dependencies are inferred from the claim text.