US 11,940,041 B2
Gear control system for vibration attenuation
John W. Burrell, Olive Branch, MS (US); John Loeffler, Sun City Center, FL (US); and Brian L. Rang, Olive Branch, MS (US)
Assigned to Parker-Hannifin Corporation, Cleveland, OH (US)
Filed by Parker-Hannifin Corporation, Cleveland, OH (US)
Filed on Sep. 28, 2021, as Appl. No. 17/487,222.
Application 17/487,222 is a division of application No. 15/708,722, filed on Sep. 19, 2017, granted, now 11,131,377, issued on Sep. 28, 2021.
Application 15/708,722 is a continuation of application No. 14/438,028, granted, now 9,765,873, issued on Sep. 19, 2017, previously published as PCT/US2013/067736, filed on Oct. 31, 2013.
Claims priority of provisional application 61/720,762, filed on Oct. 31, 2012.
Prior Publication US 2022/0010872 A1, Jan. 13, 2022
Int. Cl. F16H 57/022 (2012.01); F16H 57/00 (2012.01); F16H 57/12 (2006.01)
CPC F16H 57/022 (2013.01) [F16H 57/0006 (2013.01); F16H 57/12 (2013.01); F16H 2057/0222 (2013.01); F16H 2057/127 (2013.01); Y10T 74/19575 (2015.01)] 5 Claims
OG exemplary drawing
 
1. A power take off (PTO) unit that is adapted to be rotationally driven by a primary drive component and to rotationally drive an auxiliary device, the PTO unit comprising:
a housing that is configured to be attached to a primary drive component;
a first gear that is supported on the housing and includes a portion that extends from the housing and is adapted to be rotationally driven by the primary drive component;
a second gear that is supported on the housing so as to be rotationally driven by the first gear and is adapted to rotationally drive an auxiliary device;
a sensor that is configured to generate a signal that is representative of the gear separation forces or the gear rattle signal, and
a control module that is configured to exert a biasing force that urges one of the first gear and the second gear to move relative to the other of the first gear and the second gear to attenuate gear rattle when the PTO unit is operated, wherein the biasing force is generated in response to gear separation forces or a gear rattle signal, wherein the control module adjusts a magnitude of the biasing force in response the signal from the sensor.