초록 ▼

A filter assembly is formed of an impervious elongated tubular housing and an elongated filter member positioned within the housing. In a first embodiment a barrier is interposed between a filter member first surface and the housing internal tubular surface adjacent the housing inlet end and another

A filter assembly is formed of an impervious elongated tubular housing and an elongated filter member positioned within the housing. In a first embodiment a barrier is interposed between a filter member first surface and the housing internal tubular surface adjacent the housing inlet end and another barrier is interposed between the filter member second surface and the housing internal tubular surface adjacent the housing outlet end. In a second embodiment, the filter member is formed of a pleated sheet, the pleats being folded at their ends, and the pleated sheet is formed into a frusto-conical shape with the conical base secured to the tubular housing interior surface. Air flowing into the housing inlet end passes through the filter member before exiting at the outlet end.

대표청구항 ▼

[ What is claimed:] [1.] A filter element for use in a filtration unit comprising:an elongated tubular member having a first end and a second end, having an external and internal generally cylindrical surfaces each having a cylindrical axis, the external cylindrical surface having a plurality of par

[ What is claimed:] [1.] A filter element for use in a filtration unit comprising:an elongated tubular member having a first end and a second end, having an external and internal generally cylindrical surfaces each having a cylindrical axis, the external cylindrical surface having a plurality of paralleled longitudinal external channels in planes of its cylindrical axis, the internal cylindrical surface having a plurality of paralleled longitudinal internal channels in planes of its cylindrical axis, the external and internal channels being interleaved with each other and separated by filter media, said external longitudinal channels being closed by outwardly extending folds of filter media at said tubular member first end providing a frusto-conical concave shape and said internal longitudinal channels being closed by folds of inwardly extending filter media at said tubular member second end providing a frusto-conical convex end configuration.