Patent ID: 7621839

Claim:
A power transmission mechanism for an engine-powered vehicle comprising a multiple speed ratio gear system and ratio range gearing with at least two ranges including a high range and a low range, the multiple ratio gear system having first and second torque input shafts; a clutch assembly with dual clutches for alternately connecting a vehicle engine selectively to the first and second torque input shafts; ratio change clutches in the gear system selectively connecting and disconnecting elements of the gear system whereby a torque flow path for the gear system is defined for each ratio as a torque flow path in an adjacent gear ratio in a ratio change sequence is preselected; the ratio range gearing having range gearing elements with first range clutch elements that are engageable and disengageable to establish and disestablish each ratio range; and the range gearing including a second range clutch having first clutch elements for connecting together separate elements of the multiple ratio gear system as one torque flow path is established and as another torque flow path is preselected without interruption of torque delivery through the range gearing.