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Heat Accumulators

System-powered-damper-and-control-unit

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System powered damper and control unit

Details

Inventors: Waeldner, William J.; Harris, William J.;
Assignee: Dynamics Corporation of America (New York, NY)
Primary Examiner: Camby; John J.
Assistant Examiner: Yuen; Henry C.
Attorney, Agent or Firm: McCormick, Paulding & Huber

A damper and control unit for controlling air flow through a conduit comprises a movable damper having a ball-joint connection with the end of an actuating rod. The actuating rod has first and second angularly related portions and the first portion serves as a pivot element for a movable actuating plate, the second portion mounting the damper. The movable or swingable plate is arranged above an expandible and contractable actuating bellows and has a stop chain associated therewith for limiting downward swinging movement thereof in the direction of bellows contraction. The bellows has a supply line leading to the conduit upstream of the damper and a control unit is interposed in the line for determining bellows pressure. Conduit pressure and/or temperature signals are supplied to the control for bellows and damper operation as a function thereof. A seat associated with the damper is uniformly and tightly engaged whereby to seal the conduit due to the floating or ball-joint damper connection with its actuator. Bellows and actuating plate arrangement externally of the conduit results in a requirement for lesser bellows operating pressures and bellows isolation from fire code regulations.

DETAILED DESCRIPTION It is the general object of the present invention to provide an improved system powered damper and control unit wherein provision is made for the remote or external location of an actuating bellows, a consequent reduction in operating pressure requirements is achieved along with isolation from conduit air and the elimination of smoke, fuel contribution limitations, and wherein a free floating damper arrangement is provided resulting in the uniform and tight closing operation of the damper and in the optimization of energy conservation.

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