# US 2025/0083196 A1 · Pressure Washer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0083196 A1 - Document ID: US20250083196A1 - Status: Published application - Kind: A1 - Application number: 18/830,005 - Filed: 2024-09-10 - Published: 2025-03-13 - Earliest claimed: 2023-09-12 - Assignees: Andreas Stihl AG & Co. KG - Applicants: Andreas Stihl AG & Co. KG - Inventors: Alexander Kiebler; Lukas Zürcher; Christopher Tost - Web page: https://patentgrep.com/patent/US20250083196A1 ## CPC - B08B 3/026: {Cleaning by making use of hand-held spray guns; Fluid preparations therefor} - B08B 2203/0223: Electric motor pumps - B08B 2203/027: Pump details - B08B: CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL ## Abstract The invention relates to a pressure washer (1) comprising a port (2) for a liquid source (3), a high-pressure pump (4), a main line (5), through which liquid can be conveyed from the port (2) to a spray opening (6) of the main line (5) by the high-pressure pump (4), and a first electric motor (10) for driving the high-pressure pump (4), which generates a first amount of power. The pressure washer (1) comprises a second electric motor (20) for driving the high-pressure pump (7), which generates a second amount of power. The pressure washer (1) comprises a gearbox (30), which comprises an output shaft (31) for driving the high-pressure pump (4). The gearbox (30) is designed in such a way that the first amount of power and the second amount of power can be used simultaneously to drive the output shaft (31) of the gearbox (30). ## Claims ### Claim 1 A pressure washer, comprising: a port (2) for connecting the pressure washer to a liquid source (3); a high-pressure pump (4); a gearbox (30) with an output shaft (31) for driving the high-pressure pump (4); a main line (5), through which liquid can be conveyed from the port (2) to a spray opening (6) of the main line (5) by the high-pressure pump (4); and two electric motors (10, 20), including a first electric motor (10) operatively connected to the gearbox (30) for driving the high-pressure pump (4), the first electric motor (10) generating a first amount of power, and a second electric motor (20) operatively connected to the gearbox (30) for driving the high-pressure pump (7), the second electric motor (20) generating a second amount of power, wherein the gearbox (30) is designed such that the first amount of power and the second amount of power can be simultaneously transferred to the output shaft (31). ### Claim 2 (depends on 1) The pressure washer according to claim 1, wherein the first electric motor (10) is an alternating current motor. ### Claim 3 (depends on 1) The pressure washer according to claim 1, wherein the first electric motor (10) is a universal motor. ### Claim 4 (depends on 1) The pressure washer according to claim 1, wherein the second electric motor (20) is a direct current motor. ### Claim 5 (depends on 1) The pressure washer according to claim 1, wherein the second electric motor (20) is a brushless direct current motor. ### Claim 6 (depends on 1) The pressure washer according to claim 1, wherein the second electric motor (20) is an electronically commutated motor. ### Claim 7 (depends on 1) The pressure washer according to claim 1, wherein the first electric motor (10) can be supplied by an external energy source. ### Claim 8 (depends on 1) The pressure washer according to claim 1, wherein the first electric motor (10) can be supplied by an alternating current voltage. ### Claim 9 (depends on 1) The pressure washer according to claim 1, wherein the first electric motor (10) can be supplied by a mains voltage. ### Claim 10 (depends on 1) The pressure washer according to claim 1, further comprising a battery (21), wherein the pressure washer (1) is configured to supply the second electric motor (20) with electrical energy from the battery (21). ### Claim 11 (depends on 1) The pressure washer according to claim 1, wherein the gearbox (30) is designed such that selectively the two electric motors drive the output shaft (31) simultaneously, or only one of the two electric motors drives the output shaft (31). ### Claim 12 (depends on 1) The pressure washer according to claim 1, wherein the gearbox (30) comprises at least one freewheel (32, 33) which, when the output shaft (31) is driven by only one of the two electric motors (10, 20), prevents a power transmission from an active one of the two electric motors (10, 20) to an inactive one of the two electric motors (10, 20). ### Claim 13 (depends on 1) The pressure washer according to claim 1, wherein the first electric motor (10) and the second electric motor (20) are electrically separated from each other. ### Claim 14 (depends on 1) The pressure washer according to claim 1, wherein the output shaft (31) of the gearbox (30) is a single output shaft (31). ### Claim 15 (depends on 1) The pressure washer according to claim 1, wherein the gearbox (30) is a planetary gear system. ### Claim 16 (depends on 15) The pressure washer according to claim 15, wherein the planetary gear system comprises a sun gear (34), a ring gear (35), and planet gears (36). ### Claim 17 (depends on 16) The pressure washer according to claim 16, wherein one of the two electric motors (10, 20) can drive the sun gear (34) and another of the two electric motors (10, 20) can drive the ring gear (35). ### Claim 18 (depends on 17) The pressure washer according to claim 17, wherein the first electric motor (10) can drive the sun gear (34), and wherein the second electric motor (20) can drive the ring gear (35). ### Claim 19 (depends on 16) The pressure washer according to claim 16, wherein the output shaft (31) can be driven by the planet gears (36), and wherein the planet gears (36) can be driven by the sun gear (34) and/or the ring gear (35). ### Claim 20 (depends on 19) The pressure washer according to claim 19, wherein the output shaft (31) for driving the high-pressure pump (1) can be rotated about an axis of rotation (50), and wherein the planet gears (36) can be driven by the sun gear (34) and/or the ring gear (35) to rotate about the axis of rotation (50).