# US 11,897,010 B2 · Heatable high pressure cleaning appliance > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,897,010 B2 - Document ID: US11897010B2 - Status: Granted - Kind: B2 - Application number: 17/198,074 - Filed: 2021-03-10 - Published: 2021-06-24 - Granted: 2024-02-13 - Earliest claimed: 2018-09-11 - Assignees: Alfred Kärcher GmbH & Co. KG - Applicants: Alfred Kärcher SE & Co. KG - Inventors: Stefan Kelle; Ralph Seitter; Zheyi Jin; Denis Dammkoehler; Stefan Ehrhardt - Web page: https://patentgrep.com/patent/US11897010B2 ## CPC - B08B 3/10: with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration - B05C 11/1042: {provided with means for heating or cooling the liquid or other fluent material in the supplying means upstream of the applying apparatus} - B08B 3/02: Cleaning by the force of jets or sprays - B08B 13/00: Accessories or details of general applicability for machines or apparatus for cleaning - B08B 3/026: {Cleaning by making use of hand-held spray guns; Fluid preparations therefor} - B08B 2203/007: Heating the liquid - B08B 2203/0211: Case coverings - B08B 2203/0223: Electric motor pumps - B08B 2203/0276: Hose reels specific for high pressure cleaners - B08B: CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL - B05C: APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (spraying apparatus, atomising apparatus, nozzles B05B; plant for applying liquids or other fluent materials to objects by electrostatic spraying B05B5/08) ## Abstract A heatable high pressure cleaning appliance is provided with an undercarriage and a housing lower part, arranged on the undercarriage, in which a motor and a pump driven by the motor for pressurizing water are arranged, and with a fuel-operated heat exchanger for heating the water and a fuel tank for storing liquid fuel for the heat exchanger. In order to further develop the heatable high pressure cleaning appliance in such a way that it has a high mechanical stability and is producible in a cost-effective manner, it is proposed that the fuel tank is configured as a one-piece plastic hollow body, which forms the housing lower part and is held on a rigid support frame, wherein the support frame forms a shock protector that at least partially surrounds the fuel tank in the circumferential direction. ## Claims ### Claim 1 A heatable high pressure cleaning appliance with an undercarriage on which a plurality of wheels are rotatably mounted, and with a housing lower part, arranged on the undercarriage, in which a motor and a pump driven by the motor for pressurizing water are arranged, and with a fuel-operated heat exchanger for heating the water, and a fuel tank for storing liquid fuel for the heat exchanger, wherein the fuel tank is configured as a one-piece plastic hollow body, which forms the housing lower part and which is held on a rigid support frame, wherein the support frame forms a shock protector that at least partially surrounds the fuel tank in the circumferential direction. ### Claim 2 (depends on 1) The heatable high pressure cleaning appliance in accordance with claim 1, wherein the support frame forms the undercarriage. ### Claim 3 (depends on 1) The heatable high pressure cleaning appliance in accordance with claim 1, wherein the support frame projects beyond a front side and a rear side of the fuel tank in relation to a main movement direction of the high pressure cleaning appliance. ### Claim 4 (depends on 1) The heatable high pressure cleaning appliance in accordance with claim 1, wherein the support frame projects transversely to the main movement direction of the high pressure cleaning appliance beyond a first longitudinal side and a second longitudinal side of the fuel tank. ### Claim 5 (depends on 1) The heatable high pressure cleaning appliance in accordance with claim 1, wherein the support frame comprises two rigid side frame parts, which are arranged on mutually opposing longitudinal sides of the fuel tank. ### Claim 6 (depends on 5) The heatable high pressure cleaning appliance in accordance with claim 5, wherein the side frame parts are each configured as self-contained support frame side portions. ### Claim 7 (depends on 5) The heatable high pressure cleaning appliance in accordance with claim 5, wherein a covering is removably held at least on a side frame part, said covering covering a face side of the pump. ### Claim 8 (depends on 7) The heatable high pressure cleaning appliance in accordance with claim 7, wherein an opening is arranged between the at least one side frame part and the covering removably held thereon. ### Claim 9 (depends on 1) The heatable high pressure cleaning appliance in accordance with claim 1, wherein the support frame comprises a rigid front frame part, which is arranged on a front side of the fuel tank. ### Claim 10 (depends on 9) The heatable high pressure cleaning appliance in accordance with claim 9, wherein the front frame part is configured as a U-shaped support frame front portion. ### Claim 11 (depends on 1) The heatable high pressure cleaning appliance in accordance with claim 1, wherein the support frame comprises a rigid base frame part, which forms the undercarriage of the high pressure cleaning appliance. ### Claim 12 (depends on 11) The heatable high pressure cleaning appliance in accordance with claim 11, wherein the base frame part is configured as a U-shaped support frame base portion. ### Claim 13 (depends on 1) The heatable high pressure cleaning appliance in accordance with claim 1, wherein the support frame comprises at least one rigid back frame part, which projects beyond the rear side of the fuel tank and forms a grip of the high pressure cleaning appliance. ### Claim 14 (depends on 13) The heatable high pressure cleaning appliance in accordance with claim 13, wherein the support frame comprises two rigid rear frame parts, which are arranged at a distance from one another and project beyond the rear side of the fuel tank and each form a grip of the high pressure cleaning appliance. ### Claim 15 (depends on 13) The heatable high pressure cleaning appliance in accordance with claim 13, wherein at least one rigid rear frame part is of stirrup-shaped configuration. ### Claim 16 (depends on 1) The heatable high pressure cleaning appliance in accordance with claim 1, wherein the support frame comprises a rigid attachment frame part for attaching a crane hook or a lifting strap. ### Claim 17 (depends on 16) The heatable high pressure cleaning appliance in accordance with claim 16, wherein the attachment frame part engages over the fuel tank. ### Claim 18 (depends on 16) The heatable high pressure cleaning appliance in accordance with claim 16, wherein the attachment frame part is arranged between the motor and the fuel tank in relation to a main movement direction of the high pressure cleaning appliance. ### Claim 19 (depends on 16) The heatable high pressure cleaning appliance in accordance with claim 16, wherein the attachment frame part comprises two support frame attachment portions oriented at an angle to one another. ### Claim 20 (depends on 16) The heatable high pressure cleaning appliance in accordance with claim 16, wherein the high pressure cleaning appliance comprises a housing upper part, which is arranged on the housing lower part, wherein the housing upper part comprises a through-channel, which extends from a top side to a bottom side of the housing upper part, wherein the attachment frame part of the support frame is accessible to the user by way of the through-channel. ### Claim 21 (depends on 1) The heatable high pressure cleaning appliance in accordance with claim 1, wherein the support frame consists of metal. ### Claim 22 (depends on 1) The heatable high pressure cleaning appliance in accordance with claim 1, wherein the support frame comprises a plurality of bent pipes that are rigidly connected to one another. ### Claim 23 (depends on 22) The heatable high pressure cleaning appliance in accordance with claim 22, wherein the pipes are welded to one another. ### Claim 24 (depends on 1) The heatable high pressure cleaning appliance in accordance with claim 1, wherein the support frame comprises a base plate on which the heat exchanger is arranged. ### Claim 25 (depends on 1) The heatable high pressure cleaning appliance in accordance with claim 1, wherein the fuel tank forms a motor receiving part into which the motor is insertable and which comprises supporting bodies for supporting the motor. ### Claim 26 (depends on 25) The heatable high pressure cleaning appliance in accordance with claim 25, wherein the motor receiving part comprises a through-duct, which is molded into the fuel tank and extends from a top side to a bottom side of the fuel tank. ### Claim 27 (depends on 1) The heatable high pressure cleaning appliance in accordance with claim 1, wherein the fuel tank comprises a recess, which forms a decoupling tank that comprises an inlet connectable to a water supply network and that is in flow connection with the pump. ### Claim 28 (depends on 27) The heatable high pressure cleaning appliance in accordance with claim 27, wherein a fill level-dependent valve is arranged at the inlet of the decoupling tank. ### Claim 29 (depends on 1) The heatable high pressure cleaning appliance in accordance with claim 1, wherein the fuel tank is produced by rotational molding. ### Claim 30 (depends on 1) The heatable high pressure cleaning appliance in accordance with claim 1, wherein the high pressure cleaning appliance comprises a housing upper part, which is arranged on the housing lower part. ### Claim 31 (depends on 30) The heatable high pressure cleaning appliance in accordance with claim 30, wherein the housing upper part is configured as a one-piece closed plastic hollow body. ### Claim 32 (depends on 30) The heatable high pressure cleaning appliance in accordance with claim 30, wherein the housing upper part is produced by rotational molding. ### Claim 33 (depends on 30) The heatable high pressure cleaning appliance in accordance with claim 30, wherein the housing upper part forms at least one winding hook for winding up a hose and/or an electrical cable.