Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
August 22, 2006
Patent Application Number
10810726
Date Filed
March 29, 2004
Patent Primary Examiner
Patent abstract
A hydraulic transmission apparatus with a lockup clutch has a pump impeller, a turbine runner, a side cover, a lockup clutch, a clutch piston, a lockup control unit, a frictional engagement unit and a resilient member, a backward movement stopping unit, wherein a transmission capacity of the lockup clutch by virtue of a biasing force of the resilient member is set smaller than a torque absorption capacity of the pump impeller when the engine is in an idle state so that the clutch piston is held at the predetermined backward position by virtue of the pressure difference when the engine is in the idle state.
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