# US 12,214,659 B2 · Power take-off (PTO) assembly in a transmission and PTO assembly operating method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,214,659 B2 - Document ID: US12214659B2 - Status: Granted - Kind: B2 - Application number: 18/523,236 - Filed: 2023-11-29 - Published: 2024-05-30 - Granted: 2025-02-04 - Earliest claimed: 2022-11-30 - Assignees: Dana (WUXI) Technology Co., Ltd. - Applicants: Dana (Wuxi) Technology Co., Ltd. - Inventors: Weiguo Zhao; Filip D. Schacht; Quan Liu - Web page: https://patentgrep.com/patent/US12214659B2 ## CPC - B60K 17/28: characterised by arrangement, location, or type of power take-off - B60K 1/02: comprising more than one electric motor - B60K 17/02: characterised by arrangement, location, or kind of clutch - B60K 17/08: of mechanical type - B60K 17/344: having a transfer gear - F16H 3/003: {the gear ratio being changed by inversion of torque direction} - F16H 3/10: with one or more one-way clutches as an essential feature - F16H 3/54: one of the central gears being internally toothed and the other externally toothed - F16H 37/065: {with a plurality of driving or driven shafts (F16H37/0806 takes precedence)} - B60K 2025/005: {driven by electric motors forming part of the propulsion unit} - B60Y 2400/424: Friction clutches - B60Y 2400/427: One-way clutches - B60Y 2400/61: Arrangements of controllers for electric machines, e.g. inverters - F16H 2200/0021: specially adapted for electric vehicles - F16H 2200/0034: the gear ratios comprising two forward speeds - F16H 2200/2005: with one sets of orbital gears - F16H 2200/2035: with two engaging means - F16H 2200/2064: using at least one positive clutch, e.g. dog clutch - F16H 2200/2094: using positive clutches, e.g. dog clutches - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - F16H: GEARING - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY ## Abstract Power take-off (PTO) systems and methods. A PTO assembly, in one example, includes a first one-way clutch configured to engage with a shaft of a prime mover or an output shaft when the prime mover rotates in a first direction and a second one-way clutch configured to engage with the shaft of the prime mover or the output shaft when the prime mover rotates in second direction which is opposite the first direction. The PTO assembly further includes a first mechanical branch rotationally coupling the first one-way clutch to the output shaft or the prime mover shaft and a second mechanical branch rotationally coupling the second one-way clutch to the output shaft or the prime mover shaft. ## Claims ### Claim 1 A power take-off (PTO) assembly, comprising: a first one-way clutch configured to engage with a shaft of a prime mover or an output shaft when the prime mover rotates in a first direction; a second one-way clutch configured to engage with the shaft of the prime mover or the output shaft when the prime mover rotates in second direction which is opposite the first direction; a first mechanical branch rotationally coupling the first one-way clutch to the output shaft or the prime mover shaft; a second mechanical branch rotationally coupling the second one-way clutch to the output shaft or the prime mover shaft; and a PTO device rotationally coupled to the output shaft. ### Claim 2 (depends on 1) The PTO assembly of claim 1, wherein the first one-way clutch engages with the prime mover shaft when the prime mover rotates in the first direction and the second one-way clutch engages with the prime mover shaft when the prime mover rotates in the second direction. ### Claim 3 (depends on 1) The PTO assembly of claim 1, wherein the first one-way clutch engages with the output shaft when the prime mover rotates in the first direction and the second one-way clutch engages with the output shaft when the prime mover rotates in the second direction. ### Claim 4 (depends on 1) The PTO assembly of claim 1, wherein the first mechanical branch includes a different number of gears than the second mechanical branch. ### Claim 5 (depends on 1) The PTO assembly of claim 1, wherein the first and second one-way clutches are sprag clutches. ### Claim 6 (depends on 1) The PTO assembly of claim 1, wherein the first mechanical branch and the second mechanical branch include an equivalent number of gears and the second mechanical branch includes a chain or a belt. ### Claim 7 (depends on 6) The PTO assembly of claim 6, wherein the chain or the belt is rotationally coupled to two gears in the second mechanical branch. ### Claim 8 (depends on 1) The PTO assembly of claim 1, wherein the PTO device is a uni-directional pump. ### Claim 9 (depends on 1) The PTO assembly of claim 1, wherein the shaft of the prime mover is rotationally coupled to a multi-speed transmission. ### Claim 10 (depends on 1) The PTO assembly of claim 1, wherein the prime mover is an electric motor. ### Claim 11 (depends on 1) The PTO assembly of claim 1, wherein the prime mover is a hydraulic motor. ### Claim 12 A method for operation of a driveline system, comprising: during both a forward drive condition and a reverse drive condition of a prime mover, transferring mechanical power to a power take-off (PTO) device in a PTO assembly; wherein the PTO assembly includes: a first one-way clutch configured to engage with a shaft of the prime mover or an output shaft when the prime mover rotates in a first direction; a second one-way clutch configured to engage with the shaft of the prime mover or the output shaft when the prime mover rotates in second direction which is opposite the first direction; a first mechanical branch rotationally coupling the first one-way clutch to the output shaft or the prime mover shaft; a second mechanical branch rotationally coupling the second one-way clutch to the output shaft or the prime mover shaft; and the PTO device rotationally coupled to the output shaft. ### Claim 13 (depends on 12) The method of claim 12, wherein the PTO device is a uni-directional pump. ### Claim 14 (depends on 13) The method of claim 13, further comprising transferring hydraulic fluid from the PTO device to an auxiliary device. ### Claim 15 (depends on 12) The method of claim 12, wherein the prime mover is an electric motor. ### Claim 16 (depends on 12) The method of claim 12, wherein the prime mover is a hydraulic motor. ### Claim 17 A power take-off (PTO) system for a vehicle powertrain, comprising: a first one-way clutch configured to engage with a shaft of a prime mover or an output shaft when the prime mover rotates in a forward drive direction; a second one-way clutch configured to engage with the shaft of the prime mover or an output shaft when the prime mover rotates in a reverse drive direction; a first mechanical branch rotationally coupling the first one-way clutch to the output shaft or the prime mover shaft; a second mechanical branch rotationally coupling the second one-way clutch to the output shaft or the prime mover shaft; and a uni-directional pump rotationally coupled to the output shaft. ### Claim 18 (depends on 17) The PTO system of claim 17, wherein the first and second one-way clutches are ratcheting type one-way clutches. ### Claim 19 (depends on 17) The PTO system of claim 17, wherein the PTO system does not include a disconnect clutch. ### Claim 20 (depends on 17) The PTO system of claim 17, wherein the prime mover is an electric motor-generator.