Patent ID: 6210269
Filing Date: 2001-04-03
Classification: F24F

Abstract:
An oscillating drive mechanism of the type having an air discharge nozzle mounted for pivotal movement about an axis wherein the improvement comprises:an end plate on said air discharge nozzle having a pivot pin extending therefrom along said axis, said end plate further having an elongated slot therein spaced from said pivot pin;support structure, having a first side and a second thereof, said first side being positioned adjacent to and parallel to said end plate, said support structure including mating structure disposed along said axis for receiving and retaining said pivot pin to allow pivotal movement of said plate and said nozzle about said axis, said support structure having an opening therethrough spaced from said axis, said opening being configured such that said elongated slot will sweep across said opening as said air discharge nozzle pivots through a predetermined desired arcuate sweep;a drive motor attached to said second side of said support structure proximate said opening, said motor having a drive shaft extending into said opening, said drive shaft being configured to be rotatably driven about an axis parallel to said pivot axis of said air discharge nozzle;a drive mechanism rotatably disposed in said opening, one side of said drive mechanism being adjacent said end plate, said one side being rotatably coupled to said motor drive shaft for rotation of said drive mechanism by said motor drive shaft, the other side having a drive pin thereon spaced from said rotational axis of said drive shaft so that said pin is driven in an orbit about said motor axis, said drive pin being configured to engage said elongated slot, and to traverse said slot in alternating directions as said motor rotates said drive mechanism to thereby cause said air discharge nozzle to oscillate through said predetermined arcuate sweep.