# US 5,330,102 A · Spray arm inlet for dishwasher > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,330,102 A - Document ID: US5330102A - Status: Granted - Kind: A - Application number: 08/019,842 - Filed: 1993-02-19 - Granted: 1994-07-19 - Earliest claimed: 1993-02-19 - Assignees: Whirlpool Corporation - Inventors: Wilbur W. Jarvis; Roger J. Bertsch - Web page: https://patentgrep.com/patent/US5330102A ## CPC - A47L 15/23: moved by means of the sprays - 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) ## Abstract An inlet construction is provided which is particularly useful in a spray arm for a dishwasher. The inlet is formed of a circular opening in a bottom wall of the spray arm and a flat plate positioned within the hollow arm, above the opening and generally perpendicular to the direction of the liquid jet directed at the underside of the arm. The plate is held in place by being pressed against a plurality of spacers formed on the bottom wall of the arm by resilient fingers positioned adjacent to each of the spacers. The liquid jet strikes the plate and the liquid is forced radially outwardly into the arms of the spray arm to be ejected from openings in the spray arm. ## Claims ### Claim 1 An inlet in a bottom surface of a hollow interior spray arm member for a dishwasher having a central hub area and a plurality of arms extending approximately radially therefrom, said arms having holes therein from which wash liquid, received from a source of pressurized liquid in the form of a free jet not enclosed in a conduit, but directed along a path at said arm member, is to be ejected, said bottom surface consisting solely of a relatively flat surface, at least one of said holes and said inlet, said inlet comprising: an opening formed as an unencumbered aperture in said bottom surface of said arm member positioned in said path of said free jet and communicating with said hollow interior of said arm member and a flat surface positioned within said interior perpendicular to and in said path. ### Claim 2 (depends on 1) An inlet according to claim 1, wherein said flat surface is provided by a plate secured to the interior of said arm member. ### Claim 3 (depends on 2) An inlet according to claim 2, wherein said plate is secured between a spacer fixed to a bottom wall of said arm member and a resilient finger having a catch nose spaced above said spacer. ### Claim 4 (depends on 2) An inlet according to claim 2, wherein said plate is circular. ### Claim 5 (depends on 1) An inlet according to claim 1, wherein said fiat surface is spaced above a bottom wall and below a top wall of said arm member. ### Claim 6 (depends on 1) An inlet according to claim 1, wherein said opening is circular. ### Claim 7 A spray arm for a dishwasher comprising: a central hub area; a plurality of arms extending approximately radially from said hub area, said arms having holes therein from which wash liquid received from a source of pressurized liquid in the form of a free jet not enclosed in a conduit, but directed along a path at said spray arm is to be ejected; said hub area and said arms having a relatively flat bottom wall; an inlet formed as an unencumbered aperture in said bottom wall of said spray arm positioned in said path of said free jet, and a flat surface spaced above said bottom wall and positioned above said inlet perpendicular to and in said path; wherein, said liquid jet will flow unimpeded into said spray arm through said inlet and impinge on said flat surface and be caused to flow radially outwardly from said path without significant backsplash outside of said spray arm. ### Claim 8 (depends on 7) A spray arm according to claim 7, wherein said flat surface is provided by a plate secured to an interior of said spray arm. ### Claim 9 (depends on 8) A spray arm according to claim 8, wherein said plate is secured between a spacer fixed to said bottom wall of said spray arm and a resilient finger having a catch nose spaced above said spacer. ### Claim 10 (depends on 8) A spray arm according to claim 8, wherein said plate is circular. ### Claim 11 (depends on 7) A spray arm according to claim 7, wherein said fiat surface is spaced below a top wall of said spray arm. ### Claim 12 (depends on 7) A spray arm according to claim 7, wherein said inlet is circular. ### Claim 13 An inlet for a member having a hollow interior which is to receive a liquid in the form of a free jet not enclosed in a conduit, but directed along a path at said member, said inlet comprising: an opening formed as an unencumbered aperture in a surface of said member positioned in said path of said free jet and communicating with said hollow interior of said member, said aperture being the sole means for said free jet to enter said member and a flat surface positioned within said interior generally perpendicular to and in said path. ### Claim 14 (depends on 13) An inlet according to claim 13, wherein said flat surface is provided by a plate secured to the interior of said member. ### Claim 15 (depends on 14) An inlet according to claim 14, wherein said plate is secured between a spacer fixed to a bottom wall of said member and a resilient finger having a catch nose spaced above said spacer. ### Claim 16 (depends on 14) An inlet according to claim 14, wherein said plate is circular. ### Claim 17 (depends on 13) An inlet according to claim 13, wherein said flat surface is spaced above a bottom wall and below a top wall of said member. ### Claim 18 (depends on 13) An inlet according to claim 13, wherein said opening is circular.