| 摘要 |
<p>An adjustable regulator and lock device for a pivotally rotatable damper adapted for installation in an air duct of an HVAC system is disclosed, which includes a pivot rod rotatably attached to the air duct and arranged for rotation with the damper. The pivot rod has coupled to it, a lockdown member having a plurality of radially extending teeth extending outwardly therefrom. A plate member is fixedly spaced from the air duct and has a plurality of correspondingly shaped and dimensioned tooth-shaped cutouts adapted to receive the teeth of the lockdown member to selectively lock the rotational position of the pivot rod and the damper in a selected angular orientation. The teeth of the lockdown member are biased by a coil spring toward engagement with the cutouts of the plate member, and yet selectively releaseable therefrom. When the teeth of the lockdown member are manually released from engagement with the plate member, the pivot rod and the damper are rotatable to any number of select angular positions, whereby the lockdown member can be released from the force of the coil spring and the teeth of the lockdown member can be engaged with the cutouts of the plate member to secure the damper in a selected angular orientation. In a preferred embodiment, the teeth of the lockdown member have an outermost side elevational profile which is tapered, whereby the outermost dimension of the teeth is progressively greater from the plate member toward the air duct. In an alternative embodiment, the teeth of the lockdown member have an outermost dimension which is constant as measured along the length of the pivot rod. The invention provides secure and locked positioning of the damper.</p> |
