Lock-up device for torque converter
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United States of America Patent
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Jul 18, 2017
Grant Date -
Nov 26, 2015
app pub date -
Aug 6, 2015
filing date -
Jun 7, 2011
priority date (Note) -
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Abstract
A lock-up device for a torque converter includes a piston, a clutch part, a first hydraulic chamber, a second hydraulic chamber, a first hydraulic port and a second hydraulic port. The first hydraulic chamber is formed on a piston side of the front cover. The second hydraulic chamber is formed independently from the first hydraulic chamber. The first hydraulic port is in communication with the first hydraulic chamber. The second hydraulic port is formed independently from the first hydraulic port, and a portion of the second hydraulic chamber is in communication with the second hydraulic port. The first hydraulic chamber is sealed with the exception of a portion of the first hydraulic chamber that is in communication with the first hydraulic port. The second hydraulic chamber is sealed with the exception of the portion of the second hydraulic chamber that is in communication with the second hydraulic port.
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