Patents by Inventor Derek E. Muff
Derek E. Muff has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 12366289Abstract: A power take-off includes a housing that is adapted to be supported on a source of rotational energy, an input mechanism that is supported within the housing and adapted to be rotatably driven by the source of rotational energy, and an output mechanism that is supported within the housing and rotatably driven by the input mechanism. At least one of the input mechanism and the output mechanism includes a pair of mating gears. An eddy current damper is supported within the housing and configured to exert a drag torque on either or both of the mating gears during operation of the power take-off. The eddy current damper may provide a variable amount of such drag torque, a constant amount of such drag torque, or a combination of both.Type: GrantFiled: June 26, 2020Date of Patent: July 22, 2025Assignee: Parker-Hannifin CorporationInventors: Derek E. Muff, Bradley A. Slakans, Steven Wesley Bennett
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Publication number: 20240042848Abstract: A power take-off includes a housing including a mounting surface that is adapted to be secured to a source of rotational energy. The mounting surface has an opening therethrough. An input mechanism includes an input gear that has a portion that extends outwardly from the housing through the opening provided through the mounting surface and is adapted to extend within and be rotatably driven about an input gear rotational axis by a driving gear contained within the source of rotational energy. An output mechanism is disposed within the housing and includes a driven gear that is rotatably driven about an output gear rotational axis by the input gear of the input mechanism. The rotational axis of the input gear and the rotational axis of the driven gear are movable relative to one another so as to minimize the transmission of torque transients and other vibrations therethrough during operation.Type: ApplicationFiled: October 18, 2023Publication date: February 8, 2024Applicant: Parker-Hannifin CorporationInventor: Derek E. Muff
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Publication number: 20230383797Abstract: A power take-off includes a hollow housing that is adapted to be supported on a source of rotational energy. An input mechanism supported within the housing is adapted to be rotatably driven by the source of rotational energy, and an output mechanism supported within the housing is adapted to rotatably drive a rotatably driven accessory. A clutch is operable in an engaged condition, wherein the input mechanism rotatably drives the output mechanism, and a disengaged condition, wherein the input mechanism does not rotatably drive the output mechanism. A clutch actuator selectively operates the clutch in the engaged and disengaged conditions and includes a primary clutch cylinder, a primary clutch piston that is supported for movement relative to the primary clutch cylinder, and a secondary clutch piston that is supported for movement relative to the primary clutch cylinder and the primary clutch piston.Type: ApplicationFiled: May 25, 2023Publication date: November 30, 2023Applicant: PARKER-HANNIFIN CORPORATIONInventors: Derek E. Muff, Maxwell A. Samlow
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Patent number: 11794576Abstract: A power take-off includes a housing including a mounting surface that is adapted to be secured to a source of rotational energy. The mounting surface has an opening therethrough. An input mechanism includes an input gear that has a portion that extends outwardly from the housing through the opening provided through the mounting surface and is adapted to extend within and be rotatably driven about an input gear rotational axis by a driving gear contained within the source of rotational energy. An output mechanism is disposed within the housing and includes a driven gear that is rotatably driven about an output gear rotational axis by the input gear of the input mechanism. The rotational axis of the input gear and the rotational axis of the driven gear are movable relative to one another so as to minimize the transmission of torque transients and other vibrations therethrough during operation.Type: GrantFiled: October 11, 2021Date of Patent: October 24, 2023Assignee: Parker-Hannifin CorporationInventor: Derek E. Muff
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Publication number: 20220024305Abstract: A power take-off includes a housing including a mounting surface that is adapted to be secured to a source of rotational energy. The mounting surface has an opening therethrough. An input mechanism includes an input gear that has a portion that extends outwardly from the housing through the opening provided through the mounting surface and is adapted to extend within and be rotatably driven about an input gear rotational axis by a driving gear contained within the source of rotational energy. An output mechanism is disposed within the housing and includes a driven gear that is rotatably driven about an output gear rotational axis by the input gear of the input mechanism. The rotational axis of the input gear and the rotational axis of the driven gear are movable relative to one another so as to minimize the transmission of torque transients and other vibrations therethrough during operation.Type: ApplicationFiled: October 11, 2021Publication date: January 27, 2022Applicant: Parker-Hannifin CorporationInventor: Derek E. Muff
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Patent number: 11142065Abstract: A power take-off includes an input mechanism having an input gear that is rotatably supported on a housing of the power take-off portion. The input mechanism also has a portion that extends outwardly through the opening provided through the mounting surface of the housing of the power take-off portion and that is adapted to extend within and be rotatably driven by the source of rotational energy. The power take-off further includes an output mechanism that is disposed within the housing and includes a driven gear that is rotatably driven by the input gear of the input mechanism. A rotational axis of the input gear and a rotational axis of the driven gear are misaligned so as to minimize the transmission of torque transients and other vibrations therethrough during operation.Type: GrantFiled: November 30, 2018Date of Patent: October 12, 2021Assignee: Parker-Hannifin CorporationInventor: Derek E. Muff
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Publication number: 20210001719Abstract: A power take-off includes an input mechanism having an input gear that is rotatably supported on a housing of the power take-off portion. The input mechanism also has a portion that extends outwardly through the opening provided through the mounting surface of the housing of the power take-off portion and that is adapted to extend within and be rotatably driven by the source of rotational energy. The power take-off further includes an output mechanism that is disposed within the housing and includes a driven gear that is rotatably driven by the input gear of the input mechanism. A rotational axis of the input gear and a rotational axis of the driven gear are misaligned so as to minimize the transmission of torque transients and other vibrations therethrough during operation.Type: ApplicationFiled: November 30, 2018Publication date: January 7, 2021Applicant: Parker-Hannifin CorporationInventor: Derek E. Muff
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Publication number: 20200408276Abstract: A power take-off includes a housing that is adapted to be supported on a source of rotational energy, an input mechanism that is supported within the housing and adapted to be rotatably driven by the source of rotational energy, and an output mechanism that is supported within the housing and rotatably driven by the input mechanism. At least one of the input mechanism and the output mechanism includes a pair of mating gears. An eddy current damper is supported within the housing and configured to exert a drag torque on either or both of the mating gears during operation of the power take-off. The eddy current damper may provide a variable amount of such drag torque, a constant amount of such drag torque, or a combination of both.Type: ApplicationFiled: June 26, 2020Publication date: December 31, 2020Applicant: Parker-Hannifin CorporationInventors: Derek E. Muff, Bradley A. Slakans, Wesley Bennett