Patent ID: 7559869

Claim:
A frictional limited slip differential comprising: a body section having a fixed cover, a first side pinion gear arranged inside of said body section and connected with a driving shaft of a vehicle, a second side pinion gear rotatably connected with a driving shaft of said vehicle opposite to said first side pinion gear, a pair of differential pinion gears each of which is rotated in engagement with said first side pinion gear and second side pinion gear, friction plates arranged at rear sides of said first side pinion gear and second side pinion gear, and a pressure generating device being filled with viscous fluid and having a cover gear and a piston gear, and being constructed such that said cover gear and said piston gear engage with said second side pinion gear and first side pinion gear, respectively, and can be displaced away from each other in a longitudinal direction of said device by a pressure of the viscous fluid pushing said second side pinion gear and said first side pinion gear, respectively.