US 12,428,828 B2
Grey water toilet and flushing method
Clayton C. Garrels, Sheboygan, WI (US); William C. Kuru, Plymouth, WI (US); and Randy S. Graskamp, Sheboygan, WI (US)
Assigned to Kohler Co., Kohler, WI (US)
Filed by Kohler Co., Kohler, WI (US)
Filed on Dec. 20, 2023, as Appl. No. 18/390,662.
Application 16/829,913 is a division of application No. 14/019,487, filed on Sep. 5, 2013, granted, now 10,655,313, issued on May 19, 2020.
Application 18/390,662 is a continuation of application No. 17/497,300, filed on Oct. 8, 2021, granted, now 11,885,111.
Application 17/497,300 is a continuation of application No. 16/829,913, filed on Mar. 25, 2020, granted, now 11,168,471, issued on Nov. 9, 2021.
Claims priority of provisional application 61/697,565, filed on Sep. 6, 2012.
Prior Publication US 2024/0125103 A1, Apr. 18, 2024
Int. Cl. E03D 5/00 (2006.01); E03D 1/08 (2006.01); E03D 1/34 (2006.01)
CPC E03D 5/006 (2013.01) [E03D 1/08 (2013.01); E03D 1/34 (2013.01); E03D 5/003 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A grey water trapway system for a toilet, the grey water trapway system comprising:
a trapway passage first end with a connection to a toilet bowl;
a trapway passage curved portion at a height higher than the connection to the toilet bowl;
a trapway passage down-leg extending from the trapway passage curved portion in a substantially vertical direction;
an inlet opening configured to supply grey water to the trapway passage down-leg;
a trapway passage horizontal portion extending from the trapway passage down-leg to an exit to a drain pipe; and
a dispensing pipe directly connected to the drain pipe and configured to connect the drain pipe and grey water trapway system to a storage tank.
 
5. A grey water trapway system for a toilet, the grey water trapway system comprising:
a trapway passage curved portion;
a trapway passage down-leg extending from the trapway passage curved portion in a substantially vertical direction;
an inlet opening configured to supply grey water to the trapway passage down-leg;
a trapway passage horizontal portion extending from the trapway passage down-leg to an exit to a drain pipe, and
a dispensing pipe directly connected to the drain pipe and configured to connect the drain pipe and grey water trapway system to a storage tank.
 
11. A grey water system configured to be in fluid communication with a trapway of a toilet, the grey water system comprising:
a collection device configured to capture water from at least one appliance;
a pump configured to cause the captured water to move from the at least one appliance to a storage tank, wherein the storage tank is connected to the trapway of the toilet;
a pipe configured to couple to an outlet of the storage tank and couple to a trapway of the toilet, wherein the trapway comprises:
a trapway passage curved portion;
a trapway passage down-leg extending from the trapway passage curved portion in a substantially vertical direction; and
a trapway passage horizontal portion extending from the trapway passage down-leg to an exit to a drain pipe; and
a dispensing subsystem directly connected to the drain pipe and configured to connect the drain pipe and the grey water system to direct excess grey water from the storage tank.