Patent ID: 6702187
Filing Date: 2004-03-09
Classification: F24F

Abstract:
A diffuser for controlling flow of air in an air conditioning system, the said diffuser including:an air flow control baffle, a first temperature sensitive element for sensing room temperature variations, said first temperature sensitive element including a body and a piston which move relatively to one another in response to temperature variations, a second temperature sensitive element for sensing duct temperature variations, said second temperature sensitive element including a body and a piston which move relatively to one another in response to temperature variations, a housing, a pair of links having inner ends and outer ends, the links being pivotally mounted on said housing at the inner ends and the links being connected to the baffle at the outer ends, the links protruding outwardly from said housing, each link having a respective first cam surface on one side of the pivotal mounting and a respective second cam surface on the other side of its pivotal mounting, a control element having a first surface for bearing on the first cam surfaces of the links and a second surface for bearing on the second cam surfaces of the links, spring means for urging the first surface of the control element towards the first cam surfaces of the links, and a rod having opposite ends bearing on the pistons of the temperature sensitive elements to prevent the pistons from moving towards one another, the body of one of the temperature sensitive elements being fixed to said housing and the body of the other temperature sensitive element being fast with said control element, said spring means acting on the body of the other temperature sensitive element and holding the pistons against movement away from the ends of the rod.