# US 2023/0053777 A1 · Waste drain systems and methods for a toilet > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0053777 A1 - Document ID: US20230053777A1 - Status: Published application - Kind: A1 - Application number: 17/405,436 - Filed: 2021-08-18 - Published: 2023-02-23 - Earliest claimed: 2021-08-18 - Assignees: The Boeing Company - Applicants: The Boeing Company - Inventors: Darren Carl McIntosh - Web page: https://patentgrep.com/patent/US20230053777A1 ## CPC - B64D 11/02: Toilet fittings - E03D 5/024: {Operated hydraulically or pneumatically} - E03D 9/10: Waste-disintegrating apparatus combined with the bowl {(special flushing devices E03D5/00)} - E03D 11/00: Other component parts of water-closets (pipe-joints or couplings in general F16L ){, e.g. noise-reducing means in the flushing system (noise-reducing means in combination with flushing valves E03D9/14), flushing pipes mounted in the bowl, seals for the bowl outlet, devices preventing overflow of the bowl contents; devices forming a water seal in the bowl after flushing, devices eliminating obstructions in the bowl outlet or preventing backflow of water and excrements from the waterpipe} - E03F 1/006: {Pneumatic sewage disposal systems; accessories specially adapted therefore} - B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT - E03D: WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR - E03F: SEWERS; CESSPOOLS ## Abstract A waste drain system is configured to be coupled to a toilet. The waste drain system includes a conduit including a main body defining an internal passage having a central longitudinal axis, and one or more cutting blades extending from the main body toward the central longitudinal axis. The one or more cutting blades are configured to cut one or more items that pass through the internal passage. ## Claims ### Claim 1 A waste drain system configured to be coupled to a toilet, the waste drain system comprising: a conduit including a main body defining an internal passage having a central longitudinal axis; and one or more cutting blades extending from the main body toward the central longitudinal axis, wherein the one or more cutting blades are configured to cut one or more items that pass through the internal passage. ### Claim 2 (depends on 1) The waste drain system of claim 1, wherein the waste drain system is disposed within a waste drain line connected to the toilet. ### Claim 3 (depends on 2) The waste drain system of claim 2, wherein the waste drain system forms the waste drain line. ### Claim 4 (depends on 1) The waste drain system of claim 1, wherein the waste drain system is disposed within a waste outlet interface of the toilet. ### Claim 5 (depends on 1) The waste drain system of claim 1, wherein the conduit is coupled to a vacuum generator that is configured to draw the one or more items through the internal passage by vacuum force. ### Claim 6 (depends on 1) The waste drain system of claim 1, wherein the at least one cutting blade comprises a plurality of cutting blades. ### Claim 7 (depends on 6) The waste drain system of claim 6, wherein each of the plurality of the cutting blades is opposed by another of the plurality of the cutting blades. ### Claim 8 (depends on 1) The waste drain system of claim 1, wherein a waste passage extends around the central longitudinal axis. ### Claim 9 (depends on 8) The waste drain system of claim 8, wherein the one or more cutting blades are outside of the waste passage. ### Claim 10 (depends on 1) The waste drain system of claim 1, wherein the one or more cutting blades are fixed in position. ### Claim 11 (depends on 1) The waste drain system of claim 1, wherein the one or more cutting blades are movable. ### Claim 12 (depends on 11) The waste drain system of claim 11, wherein the one or more cutting blades are spring-biased. ### Claim 13 (depends on 1) The waste drain system of claim 1, wherein the one or more cutting blades are formed on a carrier that is rolled into an annular member and disposed within the conduit. ### Claim 14 (depends on 1) The waste drain system of claim 1, wherein the conduit and the one or more cutting blades are formed as an insert that is configured to be disposed within one or both of the toilet or a waste drain line connected to the toilet. ### Claim 15 A waste drain method, comprising: cutting one or more items flushed down a toilet by one or more cutting blades of a waste drain system that is coupled to or within a waste drain connected to the toilet. ### Claim 16 (depends on 15) The waste drain method of claim 15, further comprising drawing the one or more items through the waste drain system through vacuum force. ### Claim 17 A vehicle comprising: an internal cabin; a lavatory within the internal cabin, wherein the lavatory comprises a toilet; a vacuum generator coupled to the toilet; and a waste drain system coupled to the toilet, the waste drain system comprising: a conduit including a main body defining an internal passage having a central longitudinal axis, wherein a waste passage extends around the central longitudinal axis, and wherein the conduit is coupled to the vacuum generator; and one or more cutting blades extending from the main body toward the central longitudinal axis, wherein the one or more cutting blades are outside of the waste passage, wherein the one or more cutting blades are configured to cut one or more items that pass through the internal passage, and wherein the vacuum generator is configured to draw the one or more items through the internal passage by vacuum force. ### Claim 18 (depends on 17) The vehicle of claim 17, wherein the waste drain system is disposed in one or both of a waste drain line connected to the toilet, or a waste outlet interface of the toilet. ### Claim 19 (depends on 17) The vehicle of claim 17, wherein the at least one cutting blade comprises a plurality of cutting blades, and wherein each of the plurality of the cutting blades is opposed by another of the plurality of the cutting blades. ### Claim 20 (depends on 17) The vehicle of claim 17, wherein the one or more cutting blades are movable.