# US 9,750,388 B2 · Fluid flow structure and method of use for continuous motion washing machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,750,388 B2 - Document ID: US9750388B2 - Status: Granted - Kind: B2 - Application number: 14/379,190 - Filed: 2013-02-19 - Published: 2015-01-15 - Granted: 2017-09-05 - Earliest claimed: 2009-04-22 - Assignees: Unified Brands, Inc. - Applicants: Unified Brands, Inc. - Inventors: Cantrell W. John; Mark Churchill; David Robert Gast; John N. McCreight; Bryon J. London - Web page: https://patentgrep.com/patent/US9750388B2 ## CPC - A47L 15/4221: {Arrangements for redirection of washing water, e.g. water diverters to selectively supply the spray arms (A47L15/0078 takes precedence)} - A47L 15/0092: {specially adapted to wash large items like pots, trays, baking trays, cooking grids} - A47L 15/08: by application of a pressure effect produced by pumps - B08B 3/006: {Cabinets or cupboards specially adapted for cleaning articles by hand} - B08B 3/02: Cleaning by the force of jets or sprays - B08B 3/04: Cleaning involving contact with liquid - B08B 3/102: {with means for agitating the liquid (by agitating the container B08B3/042, B08B3/044, B08B3/045, B08B3/06)} - F15D 1/0005: {Baffle plates} - A47L 15/16: with rigidly-mounted spraying devices - Y10T 137/8593: Systems - A47L: DOMESTIC WASHING OR CLEANING (brushes A46B; cleaning quantities of bottles or of other hollow articles of one kind B08B9/00; laundry D06F); SUCTION CLEANERS IN GENERAL (cleaning in general B08) - B08B: CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL - F15D: FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A washing machine and/or a fluid flow structure for a washing machine wash tank is provided. The wash tank is generally rectangular and includes a bottom wall, two side walls and two end walls extending upward from said bottom wall. The wash tank further includes at least one flow directional opening in at least one of the walls. In a preferred embodiment, the wash tank includes plurality of flow directional openings positioned along one of the side walls of the wash tank. A fluid flow structure is located within said wash tank, which includes a fluid flow guide surface, and a support for said guide surface. The guide surface includes an expansion structure that is designed to counteract expansion of the guide surface that occurs during operation of the washing machine. In one embodiment the expansion structure is an expansion slot that engages a portion of the guide surface. As the guide surface expands the expansion slot is pressed against the portion of the guide surface, causing the expansion slot to expand into a relief area associated with the expansion slot at a location generally opposite of the portion of the guide surface. ## Claims ### Claim 1 A fluid flow structure for a washing machine wash tank the fluid flow structure comprising: a removable fluid flow guide surface, said guide surface being capable of alternatively being inserted into and removed entirely from the washing machine wash tank, said guide surface including at least one region contoured inconsistently from the contour of at least one corresponding wall of the washing machine wash tank; and a support for said guide surface, wherein said support creates a gap between said guide surface and an interior surface of at least one wall of the washing machine wash tank; wherein said guide surface includes an expansion structure engaged with a portion of said support, said expansion structure being configured to expand in a first direction as said guide surface expands in a second direction, thereby providing an indication of whether the guide surface has reached a predetermined expansion value. ### Claim 2 (depends on 1) The fluid flow structure as claimed in claim 1 wherein said expansion structure forms an expansion slot that is configured to engage a finger of said support. ### Claim 3 (depends on 1) The fluid flow structure as claimed in claim 1 wherein said expansion structure is associated with a relief area within said fluid flow guide surface. ### Claim 4 (depends on 3) The fluid flow structure as claimed in claim 3 wherein said expansion structure is configured to expand into said relief area as said fluid flow guide surface expands in the second direction, thereby causing said expansion structure to press against said portion of said support such that said expansion structure is caused to expand in the first direction. ### Claim 5 (depends on 4) The fluid flow structure as claimed in claim 4 wherein said relief area includes a bottom surface that correlates with the predetermined expansion value of the guide surface. ### Claim 6 (depends on 3) The fluid flow structure as claimed in claim 3 wherein said relief area comprises a primary relief area and a secondary relief area. ### Claim 7 (depends on 1) The fluid flow structure as claimed in claim 1 wherein a circulating wash action is created in the washing machine wash tank whether said guide surface is inserted into or removed from the washing machine wash tank. ### Claim 8 (depends on 1) The fluid flow structure as claimed in claim 1 wherein said guide surface and/or said support are capable of flexible motion independent of the walls of the washing machine wash tank. ### Claim 9 (depends on 8) The fluid flow structure as claimed in claim 8 wherein said flexible motion at least partially isolates impacts, noise or other vibrations acting on said guide surface from acting on the walls of the washing machine wash tank. ### Claim 10 (depends on 9) The fluid flow structure as claimed in claim 9 wherein said impacts, noise or other vibrations acting on said guide surface causes said guide surface to expand. ### Claim 11 (depends on 1) The fluid flow structure as claimed in claim 1 wherein said guide surface is capable of alternatively being inserted into and removed entirely from the washing machine wash tank without the use of any tools. ### Claim 12 (depends on 1) The fluid flow structure as claimed in claim 1 wherein said support is removably positioned within the washing machine wash tank. ### Claim 13 (depends on 1) The fluid flow structure as claimed in claim 1 wherein said at least one region contoured inconsistently from the contour of at least one corresponding wall of the washing machine wash tank is generally curved. ### Claim 14 The fluid flow structure as claimed in 1 wherein said fluid flow guide surface is generally flexible. ### Claim 15 (depends on 1) The fluid flow structure as claimed in claim 1 wherein said support comprises a plurality of interconnected ribs. ### Claim 16 (depends on 1) The fluid flow structure as claimed in claim 1 wherein said fluid flow guide surface defines a washing area within said wash tank, said washing area being generally opposite said gap with respect to said fluid flow guide surface. ### Claim 17 (depends on 1) The fluid flow structure as claimed in claim 1 wherein said fluid flow guide surface and said support comprise a plurality of fluid flow guide surfaces and/or supports within the wash tank. ### Claim 18 (depends on 17) The fluid flow structure as claimed in claim 17 further comprising a divider member at least primarily held in place between two adjacent sets of said plurality of fluid flow guide surfaces and/or supports. ### Claim 19 A washing machine comprising: a generally rectangular wash tank including a bottom wall, two side walls and two end walls extending upwardly from said bottom wall, said side walls being longer than said end walls; at least one flow directional opening in at least one of said walls; a fluid flow structure within said wash tank, the structure comprising: a fluid flow guide surface, said guide surface including at least one region contoured inconsistently from the contour of at least one corresponding wall of the washing machine wash tank; and a support for said guide surface, wherein said support creates a gap between said guide surface and at least one wall of the washing machine wash tank; wherein said guide surface includes an expansion structure engaged with a portion of said support, said expansion structure being configured to expand in a first direction as said guide surface expands in a second direction, thereby providing an indication of whether the guide surface has reached a predetermined expansion value. ### Claim 20 A fluid flow guide surface for a fluid flow structure for a washing machine wash tank the fluid flow guide surface comprising: a generally planar sheet that is capable of alternatively being inserted into and removed entirely from a support for said guide surface, wherein the support creates a gap between said guide surface and an interior surface of at least one wall of the washing machine wash tank; wherein said guide surface includes an expansion structure engaged with a portion of the support, said expansion structure being configured to expand in a first direction as said guide surface expands in a second direction, thereby providing an indication of whether the guide surface has reached a predetermined expansion value.