초록 ▼

A filter bag is longitudinally formed with at least a portion of the filter bag formed in a frusto-conical shape. The filter bag has a plurality of radially extending members that form a propeller shaped cross-section. A lower, frusto conically shaped lower portion balloon or billows during a revers

A filter bag is longitudinally formed with at least a portion of the filter bag formed in a frusto-conical shape. The filter bag has a plurality of radially extending members that form a propeller shaped cross-section. A lower, frusto conically shaped lower portion balloon or billows during a reverse air cycle enhances dust fall from the exterior for cleaning. A manifold having multiple openings is also disclosed.

대표청구항 ▼

1. A pulse jet filter element, comprising: an inner cage; anda filter bag surrounding the inner cage, the filter bag comprising a generally cylindrical middle portion and a lower portion extending from and below the generally cylindrical middle portion, the lower portion having a frusto-conical shap

1. A pulse jet filter element, comprising: an inner cage; anda filter bag surrounding the inner cage, the filter bag comprising a generally cylindrical middle portion and a lower portion extending from and below the generally cylindrical middle portion, the lower portion having a frusto-conical shape that tapers from near a top of the lower portion of the filter bag to the bottom and terminal end of the filter bag, wherein the middle portion is positioned over the inner cage, and the lower portion of the filter bag that is above the bottom and terminal end of the filter bag is constructed and arranged to billow out and away from the inner cage when air is forced from inside the filter bag to an exterior of the filter bag. 2. A pulse jet filter element as described in claim 1, wherein the filter bag comprises a top portion extending from and above the generally cylindrical middle portion, wherein the top portion is constructed and arranged to billow out and away from the inner cage when air is forced from inside the filter bag to an exterior of the filter bag. 3. A pulse jet filter element as described in claim 1, further comprising a plurality of fastening devices that hold the middle portion of the filter bag against the inner cage, and wherein the top portion of the filter bag is not held against the inner cage. 4. A pulse jet filter element as described in claim 1, further comprising a plurality of annular bands that hold the middle portion of the filter bag against the inner cage, and wherein the lower portion of the filter bag that is above the bottom and terminal end of the filter bag is not held against the inner cage. 5. A pulse jet filter element as described in claim 1, wherein the filter bag comprises a plurality of spaced apart rays that extend radially from a center of the filter bag, wherein each of the plurality of spaced apart rays comprises a terminal end that is distal to the center of the filter bag, and wherein each of the plurality of spaced apart rays communicates with the interior of the center portion of the filter bag to provide airflow from the plurality of spaced apart rays to the center of the filter bag. 6. A pulse jet filter element as described in claim 1, wherein the filter bag further comprises a plurality of spaced apart rays that extend radially from a center of the filter bag, wherein each of the plurality of spaced apart rays comprises a terminal end that is distal to the center of the filter bag, and wherein each of the plurality of spaced apart rays communicates with the interior of the center portion of the filter bag to provide airflow from the plurality of spaced apart rays to the center of the filter bag, wherein the plurality of spaced apart rays is present on the middle portion of the filter bag, and the middle portion of the filter bag is positioned over the inner cage to hold the middle portion of the filter bag against the inner cage to substantially maintain the shape of the plurality of spaced apart rays when air is forced from inside the filter bag to an exterior of the filter bag, and the plurality of spaced apart rays are present on the lower portion of the filter bag that is above the bottom and terminal end of the filter bag, and the lower portion of the filter bag is constructed and arranged to billow out and away from the inner cage and substantially deform the plurality of spaced apart rays formed on the lower portion of the filter bag when air is forced from inside the filter bag to an exterior of the filter bag. 7. A pulse jet filter element as described in claim 1, wherein the filter bag comprises a plurality of spaced apart rays that extend radially from a center of the filter bag, wherein each of the plurality of spaced apart rays comprises a terminal end that is distal to the center of the filter bag, and wherein each of the plurality of spaced apart rays communicates with the interior of the center portion of the filter bag to provide airflow from the plurality of spaced apart rays to the center of the filter bag, and wherein the terminal end of the rays is enlarged from and wider than a portion of each of the rays that is adjacent to the center portion of the filter bag. 8. A pulse jet filter element as described in claim 1, wherein the lower portion of the inner cage is formed in a frusto-conical shape that tapers to a smaller bottom and terminal end of the inner cage, and wherein the filter bag is mounted over the inner cage, and the filter bag is held longitudinally by the inner cage. 9. A pulse jet filter element as described in claim 1, wherein the inner cage comprises radial members that extend from a center of the inner cage, and wherein the inner cage comprises enlarged ends that are present within the enlarged terminal ends of the rays of the filter bag. 10. A pulse jet filter element as described in claim 1, wherein the filter bag comprises a plurality of spaced apart rays that extend radially from a center of the filter bag, wherein each of the plurality of spaced apart rays comprises a terminal end that is distal to the center filter bag, wherein each of the plurality of spaced apart rays communicates with the interior of the center portion of the filter bag to provide airflow from the plurality of spaced apart rays to the center of the filter bag, and wherein the plurality of spaced apart rays is present on not less than 75% of the length of the filter bag. 11. A pulse jet filter element as described in claim 1, wherein the filter bag comprises a plurality of spaced apart rays that extend radially from a center of the filter bag, wherein each of the plurality of spaced apart rays comprises a terminal end that is distal to the center of the filter bag, and wherein adjoining rays of each of the plurality of spaced apart rays form a channel between the adjoining rays that is unobstructed at a lower end of the middle portion of the filter bag that adjoins the frusto-conical lower portion of the filter bag. 12. A pulse jet filter element as described in claim 1, the inner cage further comprising a manifold that mounts to a top of the filter cage and communicates with a top opening in the filter bag, wherein the manifold comprises a first opening and a second opening, the first opening forming a venturi that communicates with the top opening in the filter bag and the second opening is separated from and surrounds the first opening. 13. A pulse jet filter element as described in claim 1, the inner cage further comprising a manifold that mounts to a top of the filter cage and communicates with a top opening in the filter bag, wherein the manifold comprises a first opening and a second opening, the first opening forming a venturi that communicates with the top opening of the filter bag and the second opening is separated from and surrounds the first opening, the venturi comprising an upper opening and a lower opening that communicates with the top opening in the filter bag, wherein the portion of a shaft of the venturi that is below the flange of the manifold is shorter than a portion of the shaft of the venturi that is above the flange. 14. A pulse jet filter element as described in claim 1, the inner cage further comprising a manifold that mounts to a top of the filter cage and communicates with a top opening in the filter bag, wherein the manifold comprises a first opening and a second opening, the first opening forming a venturi that communicates with the top opening of the filter bag and the second opening is separated from and surrounds the venturi, the venturi comprising an upper opening and a lower opening that communicates with the top opening in the filter bag, wherein the lower opening of the venturi terminates on a flange of the manifold, and wherein the upper opening of the venturi is positioned above the second opening in the manifold and the lower opening of the venturi is positioned below the second opening in the manifold.