Abstract: A friction hinge uses a plastic frictional member operating against a metal shaft that needs no topically applied grease, can achieve long cycle life and can be sealed against external contamination. The frictional member engages the shaft of the hinge to form a frictional engagement to permit rotation only while a torque is applied on the housing or the shaft. For this purpose the frictional member is made initially with a smaller diameter then the shaft and is then crushed or deformed as the shaft is inserted into the frictional member. Spaces are provided about the shaft to receive material as the element is being deformed.

Abstract: A hinge assembly rotationally connecting two components includes at least a shaft coupled to one of the components and a tubular member connected to the other component and a defining an annular space around said shaft. A viscous damping fluid is disposed in said space and provides a damping force resisting relative rotation between the two components. A second tubular member is also provided that is connected to the shaft and is arranged axially around the first tubular member. In this latter configuration, static and dynamic frictional forces are generated between the tubular members that resist rotation between the components as well.