Patent ID: 6932409

Claim:
A vehicle seat assembly comprising: a seat backrest; a seat bottom; a seat frame having a front member and a rear member, said seat frame operatively supporting said seat bottom and further having at least one backrest rotating mechanism supported at said rear member that is adapted to allow said seat backrest to move between an upright position and a folded position in which said seat backrest is folded down upon said seat bottom, said seat frame further having at least one first pair of linkage attachment points on said front member to allow said rear member of said seat frame to be rotatively lifted upward and forward and move said seat frame from a seating position to a tumbled position relative to said front member; at least one tumble mechanism is operatively disposed between said front member of said seat frame and the vehicle floor, said tumble mechanism having a first and a second linkage arm, and a base plate fixedly mounted to the vehicle floor, said first and second linkage arms are operatively and pivotably mounted to said front member of said seat frame and pivotably mounted to said base plate; said first and second linkage arms having two unequal length lever arms which work cooperatively to cause said front member of said seat assembly to move rearward in an arcuate path as said rear member is lifted.