Quadrant operator
OwnerFrancis J. McCabeinventor
Life of this patent
Estimating the term…
Abstract
A novel operator for use with a damper is disclosed comprising a plurality of pivotally interconnected damper operator members which are pivotally associated with the damper blade linkage and frame, such that they may be moved to an over-center locking position to lock the damper blades in their desired fire actuated positions. The operator also comprises an actuator means for selectively acting through the operator to control the degree of blade opening, and a releasing device for responding to various activation conditions, such as heat, for disengaging the actuator from the operator members to facilitate closure and automatic locking of the blades. The operator members may also be springed biased to automatically accomplish blade closure.
Claims20
An operator for operating a damper having a frame, at least one blade, and linkage means connected to said blade for articulating said blade with respect to said frame, said operator comprisng:
- at least two operator members, said members, being pivotally interconnected with a first of said members being a frame associated member which is pivotally associated with said frame and a second of said members being a linkage associated member which is pivotally associated with said linkage means, said members being associated with said linkage means and said frame so that upon rotation of said frame associated member relative to said frame through an operating portion of its arc, said blade will be articulated relative to said frame, said articulation being between a fully open and fully closed position with respect to said frame, and further said frame associated member being adapted to be movable beyond said operating portion of said arc through a locking portion of said arc of rotation to an over-center position with respect to the pivot points of said members to lock said blade in said fully closed position.
A damper operator comprising:
- (a) a mounting bracket having a bore defined therein;
- (b) a rotatable actuating shaft journaled within said bore and further having an actuator plate fixedly attached thereto;
- (c) a plurality of pivotally interconnected members, at least one of which is pivotally disposed around said shaft;
- and
- (d) actuating means for selectively engaging said interconnected members to said actuator plate so that rotation of said shaft causes said members to rotate therewith.
Dependencies are inferred from the claim text.