Air filter spin flow inlet/outlet housing

1. An air filtration device generating air spin for use for pre filtering air entering an unloading conduit for a storage device for storing granular material comprising a housing, said housing incorporating an air inlet, and an air outlet, said housing having a longitudinal filter element arranged therein, the filter element having a length, wherein air passing into the housing through the air inlet passes through the filter and after filtration passes through the air outlet into the unloading conduit, a baffle being located within the air inlet to provide for lessening of any sound generated during a pumping of the air into the air inlet to pass through the filter, an entrance door connecting with an end of the housing, which when opened, allows for installation or removal of the filter element, and said air inlet being contoured to provide for a spin flow of the air entering into the housing to induce for its circulation around the filter along the length of the filter to attain efficient filtration of the air before the air is applied to convey the granular material from the storage device.

2. The air filtration device of claim 1 wherein said air inlet and air outlet are provided at an end of the housing which is opposite to the end where the entrance door is connected.

3. The air filtration device of claim 2 wherein the door is pivotally connected to the housing to provide for the door to swing open when the filter element is replaced or installed.

4. The air filtration device of claim 2 wherein the air outlet is axially and longitudinally aligned with the filter, while the air inlet is tangentially structurally located relative to the housing to thereby provide for a spin flow of air passing into the housing for filtration purposes.

5. The air filtration device of claim 3 wherein said door comprises a first side and a second side, a pivot pin along the first side, said pivot pin being attached to the housing, and a locking device provided on the second side of said door, for securement of said door to the housing.

6. The air filtration device of claim 5 wherein said locking device comprises a cam lever which when manipulated holds the door in closure against the housing.

7. The air filtration device of claim 6 further comprising a gasket provided between the door and the housing to insure sealing of the housing during usage.

8. The air filtration device of claim 6 further comprising a plate, said plate being spring mounted to an inner portion of the door, said plate being axially aligned with an longitudinal axis of the filter, and said plate provided for biasing against an end of the filter to assure that the spin flow of air entering the housing passes through the filter during a filtration process.

9. The air filtration device of claim 1 wherein the air inlet is contoured as a chute for directing air passing into the housing in a swirling movement around the filter.

10. The air filtration device of claim 1 wherein the baffle is secured within the air inlet to the housing.

11. The air filtration device of claim 10 wherein said baffle comprises a flange provided around an inner perimeter of the air inlet, and a sleeve connecting with and extending downwardly from the flange.

12. The air filtration device of claim 11 wherein the flange has a diameter and the air inlet has a diameter and the diameters are approximately the same.

13. The air filtration device of claim 12 wherein the air inlet is contoured below the baffle.

14. The air filtration device of claim 13 wherein said air inlet is contoured and structured as a chute arranged below the baffle for directing air passing into a swirling pattern around the filter element to achieve filtration over the length of the filter during operation of the filtration device.

15. The air filtration device of claim 14 wherein the air outlet comprises an inner end that extends into the housing and a guide to centrally seat the filter element thereon.

16. The air filtration device of claim 15 further comprising a flange provided at the inner end of the air outlet, and said flange securing against the housing to provide a seal between the air outlet and the housing.

17. An air filtration device comprising a housing, a filter capable of being installed within the housing during use of the filtration device, the filter having a length, an air inlet, an air outlet, a lid provided for access into the housing for installing or removing the filter, a baffle being located within the air inlet to provide for lessening of any sound generated during a pumping of air into the air inlet to pass through the filter, and said air inlet being contoured to induce spin flow of air pumped into the housing in a swirling pattern to assure that air is filtered over the length of the filter during use of the filtration device.