Hydraulic engagement device
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United States of America Patent
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-
Dec 11, 2018
Grant Date -
Aug 4, 2016
app pub date -
Feb 3, 2016
filing date -
Feb 4, 2015
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A hydraulic engagement device includes a first friction engagement element, a second friction engagement element, a cylinder, a piston, an oil chamber, hydraulic oil, and a release groove. The first friction engagement element and the second friction engagement element are to rotate around a third rotational axis. The piston is slidably provided in the cylinder. The oil chamber is defined between the piston and the cylinder. The hydraulic oil is supplied to the oil chamber to move the piston to push the first friction engagement element or the second friction engagement element so that the first friction engagement element engages the second friction engagement element. The release groove is provided on the cylinder or the piston. The hydraulic oil in the oil chamber is released through the release groove when a stroke of the piston exceeds a predetermined level.
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