Handle assembly for rotating a pivot rod attached to a damper within ductwork
The invention is directed to a handle assembly for rotating a pivot rod attached to a damper within ductwork, for the purpose of controlling the flow of conditioned air therethrough. In particular, the present invention provides a pre-assembled portion of the required parts, thereby reducing the number of steps required for final assembly of the damper handle to the pivot rod, resulting in a significant time savings.
1. A handle assembly for rotating a pivot rod attached to a damper within ductwork comprising:
a. a washer having a first through hole being adapted to be slidably inserted over the pivot rod;
b. a handle having a pivot end and a free end, wherein the handle is adapted for rotating the pivot rod, wherein the handle is permanently attached to the washer; and
c. wingnut permanently attached to the pivot end of the handle, wherein the wingnut is threadedly engageable with the pivot rod and fixed in position relative to the handle in a direction defined by a pivot axis of the pivot rod.
2. The handle assembly of claim 1 , wherein the pivot end of the handle has a second through hole being adapted to be slidably inserted over the pivot rod.
3. The handle assembly of claim 2 , wherein the second through hole is configured and dimensioned to correspond with a cross-sectional shape of the pivot rod so that rotation of the handle causes simultaneous rotation of the pivot rod.
4. The handle of claim 1 , wherein the washer comprises:
a. a plate; and
b. a pad being joined to a proximal portion of the plate.
5. The handle of claim 4 , wherein the plate includes a distal portion which is permanently attached to the handle.
6. The handle of claim 5 , wherein the plate is permanently attached to the handle via at least one rivet.
7. The handle of claim 5 , wherein the metal plate includes a central bent portion positioned between the first through hole and the distal portion.
8. The handle of claim 4 , wherein the pad is made from rubber.
9. The handle of claim 8 , wherein the rubber pad includes a proximal frictional surface for engagement with a wall of the ductwork.
10. The handle of claim 2 , wherein before assembly the wingnut includes a cylindrical tail, and wherein after assembly the cylindrical tail extends through the second through hole and is flared over the second through hole for achieving a permanent attachment thereof.
11. The handle of claim 1 , wherein the wingnut has a threaded hole for threadedly engaging with the pivot rod.
12. A handle assembly for rotating a pivot rod attached to a damper within ductwork comprising the following three parts:
a. a washer having a through hole being adapted to be slidably inserted over the pivot rod;
b. a handle having a pivot end and a free end, wherein the handle is adapted for rotating the pivot rod; and
c. a wingnut, wherein the wingnut is threadedly engageable with the pivot rod; and wherein any two of the three parts are permanently pre-assembled in order to save time when attaching the three parts to the pivot rod.
13. The handle assembly of claim 12 , wherein the washer is permanently attached to the handle.
14. The handle assembly of claim 12 , wherein the handle is permanently attached to the wingnut.