VISCOUS FAN CLUTCH: FLUID DAM ON SCOOP PLATE HAS ENLARGED HEAD AND ZERO CLEARANCE WITH DRIVE PLATE

摘要

A fan clutch construction and method of making the same are provided, the fan clutch construction comprising a drive plate rotatably mounted in a chamber of a housing and a scoop plate disposed in the chamber and being operatively interconnected to the housing to cause rotation of the housing when the scoop plate is rotated by the rotation of the drive plate, the scoop plate having a dam that cooperates with the drive plate to cause rotation of the scoop plate through a fluid coupling drive arrangement with the drive plate, the dam having a surface that provides a substantially zero clearance with the drive plate when relative movement is provided between the drive plate and the scoop plate.