Damper blade and damper blade assembly for an air duct
a technology of damper blades and air ducts, which is applied in the direction of lighting and heating apparatus, ventilation systems, heating types, etc., can solve the problems of component parts, substantial installation time, and subsequent adjustment or balancing
Inactive Publication Date: 2010-08-05
CAPITAL HARDWARE SUPPLY LLC
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
[0013]The present invention seeks to significantly reduce the number of components required in a damper blade assembly and to reduce cost of manufacture by more efficient use of material to produce the parts, and to significantly reduce time spent in assembling and installing these parts and adjusting the installed damper blade when balancing the system.
[0016]Another object is for at least one of these pivot elements to have outward projections on its external surface for engagement with the edges of the aperture in the duct wall through which it is inserted inwardly, these projections to restrain the pivot element from being moved or pulled axially out of the hole in the duct wall. In a preferred embodiment these projections would be external threads of a standard pitch to later receive and cooperate with a wing nut or equivalent, which when screwed onto said external threads, locks against the duct wall and fixes the axial position and rotational orientation of the pivot element.
[0019]One of the two pivot elements extends substantially further outward of the aperture in the duct wall and then extends transversely of the axis of the pivot element, as a handle or lever. When the HVAC system is balanced such handle or lever is turned to pivot the damper plate between its closed position where the plane of the plate is perpendicular to the air flow axis of the duct, and a 90° pivot therefrom putting the plane of the plate parallel to the flow axis to allow maximum airflow, or to any angular position therebetween. The selected angular position of the plate is later maintained by a wing nut pivotally engaged to the pivot pin which includes the handle. Thus, an operator or technician who rotates the wing nut to an open position can with his other hand easily engage the closely adjacent lever, rotate or pivot the damper plate, and re-tighten the wing nut.
Problems solved by technology
Prior art assembles of the type described above have numerous component parts and require substantial time for installation and subsequent adjustment or balancing.
Method used
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Embodiment Construction
[0045]FIGS. 1-3 illustrate the new damper assembly 10 in a conventional HVAC duct system represented by duct segment 12.
[0046]A. The Damper Plate
[0047]The new damper plate 14 as seen in FIGS. 1-3 and 7 is as a disk-like element of diameter dimensioned to fit with appropriate clearance in bore 15 of duct 12. Plate 14 has a central part and a peripheral edge region and includes two apertures 16A, 16B in said peripheral edge region which are aligned along a diameter and pivot axis Y-Y. Adjacent to aperture 16A in plate 14 is a finger-like projection 18 which serves as a guide pin to enter aperture 20 (see FIGS. 3 and 4) in the wall of duct 12 during initial installation of plate 14. Within the scope of this invention it is also possible to utilize a rectangular or other shaped damper plate in duct of corresponding shape bore.
[0048]B. Installation of the Damper Plate
[0049]Installation is shown in FIG. 3 where plate 14 may be held vertically as shown by a solid line circle 14A or angled ...
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A damper plate assembly adapted for installation in a circular air duct having tubular walls defining a bore about a central air flow axis with a set of coaxial apertures in opposing walls, the damper plate assembly including:a. a disk-like damper plate having (i) a central body part with a peripheral edge region, and a set of first and second holes extending transversely through the damper plate and situated along a diametrical line 180 degrees apart in first and second opposite portions respectively of the peripheral edge region, and (ii) a finger-like projection extending in the plane of the disk radially outward of the first peripheral edge region along the diametrical line, andb. first and second pivot elements adapted to engage the first and second opposite peripheral portions, the first pivot element having a body part with proximal and distal ends along a central longitudinal axis and extending axially from the distal end a set of two fingers which have a closed unflexed state where the fingers are generally closely parallel, the fingers being resiliently bendable apart from each other to a flexed state and biased to return to their closed state, one of the fingers including a projection extending transversely of the central longitudinal axis toward the other finger, and the other finger having a recess into which the projection extends when the fingers are in their closed state.
Description
I. BACKGROUND[0001]A. Field of the Invention[0002]This invention relates to a mounting assembly for installation and adjustment of a pivotal damper blade within an air duct system.[0003]B. Description of Related Art[0004]Conventional heating, ventilating and air-conditioning (HVAC) systems utilize vast lengths of sheet metal duct work to convey conditioned air throughout buildings of all types, including residential, industrial, office, medical and apartment buildings. Such HVAC systems include a great many pivotable damper blades situated in air ducts at selected locations to facilitate adjustments at the air flow as required. Installation of all these dampers and subsequent adjustment by installers or service personnel to “balance” the air duct systems is typically a substantially time-consuming process.[0005]In many conventional circular tube HVAC duct systems each damper is a circular disk pivotably mounted via bearing elements mounted on the side and extending through a set of ...
Claims
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Login to View More IPC IPC(8): F24F13/14
CPCF24F13/1486F24F13/14
InventorYOSKOWITZ, DAVID
OwnerCAPITAL HARDWARE SUPPLY LLC