Dust collector with bimodal shaker
AssigneeAercology Incorporated
InventorLeo Avondoglio
Life of this patent
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Abstract
The vertically suspended filter bags of a dust collector are periodically shaken in a bi-modal manner, to removed adhered dust. Repetitious motions applied to the closed bag bottoms are comprised of a long lifting stroke, to partially fold the bags, followed by one or more short strokes of higher impulse, to simulate a rapping or hammering. Apparatus which effects the process includes a motor driven cam that lifts, and then drops, a shaker bar mounted transversely to the bag bottoms, and a device for stopping the cam in a position which leaves the bags hanging freely for further collection of particulate.
Claims16
A method of removing adhered particulate from a filter bag comprising the steps of:
- providing an apparatus which comprises a filter bag hanging vertically inside a dust collector, the filter bag having a fixed open upper end, a length, and a closed lower end;
- first, raising the filter bag closed lower end a first vertical distance, then dropping the closed lower end, to discharge a portion of particulate adhered thereto;
- second, raising the filter bag lower end a second vertical distance which is less than the first vertical distance, then dropping the lower end, to discharge additional particulate;
- and,
- third, repeating the first and second steps until a desired amount of adhered particulate is removed.
In a dust collector having a cabinet enclosing a multiplicity of filter bags, the bags vertically suspended by open upper ends from a mounting surface inside the cabinet, the bags having closed lower ends, wherein particulate is collected on the exterior and along the lengths of the bags, the improvement which comprises means for discharging particulate from the exterior of the bags, the means configured to
- contact the closed lower ends of the multiplicity of filter bags with a first impulse, to vertically raise and drop the closed lower ends of the bags a first distance;
- then contact at least once the closed lower ends of the bags with a second impulse greater than the first impulse, to vertically raise and drop the closed lower ends of the bags a second distance which is less than the first distance;
- and
- repeating the first contacting and raising.
A dust collector comprised of:
- a cabinet for enclosing a multiplicity of filter bags;
- a multiplicity of filter bags vertically suspended by open upper ends from a mounting surface inside the cabinet, the multiplicity of filter bags having lower ends which are closed, rigid, and oblong in cross section shape, wherein particulate adheres on the exteriors and along the lengths of the multiplicity of filter bags during dust collecting;
- a shaker bar, rotatably mounted inside the cabinet beneath the multiplicity of filter bags, the shaker bar having a portion moving vertically upon rotation to contact and vertically raise the lower ends of the multiplicity of filter bags, the shaker bar having a drive arm projecting transversely to the axis of shaker bar rotation;
- a cam, rotatably mounted, for engaging the shaker bar, to cause periodic rotation thereof, the cam comprised of a plate having two projecting pins, to engage the drive arm, comprising
- a first pin positioned a first length from the cam center of rotation;
- a second pin, spaced apart from the first pin and positioned a second length from the cam center of rotation, the second length being less than the first length;
- wherein the first pin causes the lower ends of the bags to be lifted a first distance, and the second pin causes the lower ends of the bags to be lifted a second distance;
- and,
- means for rotating the rotary cam.
A dust collector comprised of:
- a cabinet for enclosing a multiplicity of filter bags;
- a multiplicity of filter bags vertically suspended by open upper ends from a mounting surface inside the cabinet, the multiplicity of filter bags having lower ends which are closed, rigid, and oblong in cross section shape, wherein particulate adheres on the exteriors and along the lengths of the multiplicity of filter bags during dust collecting;
- a shaker bar, rotatably mounted inside the cabinet beneath the multiplicity of filter bags, the shaker bar having a portion moving vertically upon rotation to contact and vertically raise the lower ends of the multiplicity of filter bags;
- a cam, rotatably mounted, for engaging the shaker bar, to cause periodic rotation thereof;
- means for rotating the cam;
- means for stopping rotation of the cam at a rotational position which leaves the multiplicity of filter bags in an unraised position.
Dependencies are inferred from the claim text.