Parker-hannifin Corporation

John William Burrell

John Loeffler

Brian L Rang

Gregory Friend

Christopher Frederick Heuer, Jr

Robert McPherson

William J Barton

Greg Friend

Robert Mcpherson

A power take off unit includes an input gear, an output gear, and an intermediary gear that cooperate to transfer power from a rotational power source to an operating target. The power take off unit has a control module that biases the intermediary gear relative to the input gear and the output gear to reduce gear rattle vibrations associated with intermeshed tooth looseness.

Gear control system for vibration attenuation

A drive train system includes a source of rotational energy, a viscous coupling and power take off assembly that is rotatably driven by the source of rotational energy, and a rotatably driven device that is rotatably driven by the viscous coupling and power take off assembly. The viscous coupling and power take off assembly may include a power take off that is rotatably driven by the source of rotational energy and a viscous coupling that is rotatably driven by the power take off. Alternatively, the viscous coupling and power take off assembly may include a viscous coupling that is rotatably driven by the source of rotational energy and a power take off that is rotatably driven by the viscous coupling. Lastly, the viscous coupling and power take off assembly may include a combined viscous coupling and power take off assembly that is integrated into a single housing.

Viscous coupling and power take off assembly for a drive train system

A power take-off unit includes a housing, an input mechanism mounted at least partially within the housing and configured for attachment to a source of rotational energy, and an output mechanism is configured for attachment to a driven accessory. The power take-off unit also includes a clutch assembly configured to selectively connect the output mechanism to the input mechanism. A pneumatic valve manifold is attached to the housing and is configured to provide pressurized air to the clutch assembly.

Power take-off unit with attached pneumatic valve

A power take-off that significantly reduces the amount of undesirable noise that is transmitted therethrough during operation includes a housing, an input mechanism, and an output mechanism. The input mechanism is disposed within the housing and is adapted to be connected to a source of rotational energy. The output mechanism is also disposed within the housing and is adapted to be connected to a driven device. The output mechanism is adapted to be rotatably driven by the input mechanism. At least one of the input mechanism and the output mechanism includes a shaft having at least one portion that is supported on the housing by a vibration damping material.

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Olive Branch, MS, United States of America

John William Burrell