Dust collecting filter cartridge and attachment structure for suspending same from baghouse tube sheet

Claim 1

A dust filter baghouse comprising; A. a baghouse tube sheet having a plurality of holes therein; B. a small-diameter filter cartridge, said filter cartridge comprising a cylindrical perforated sleeve, an annular pleated filter media which encircles said sleeve, a collar secured to the upper end of said filter media, and an annular resilient cuff secured to the upper surface of said collar; C. attachment structure suspending said filter cartridge from said baghouse tube sheet, said attachment structure comprising: a. a cylindrical bag cup having a vertical sidewall; b. means suspending said bag cup from said tube sheet in registry with one of the holes therein; c. said bag cup having an annular groove in the sidewall thereof; d. a circular series of spaced apart generally vertical resilient fingers projecting upwardly from, and secured to, said cartridge collar, each of said fingers having an inward projection positioned and arranged such that the sidewall of said cup engages each of said inward projections on said fingers and cams said fingers radially outwardly, said projections subsequently coming into registry with said annular groove in the sidewall of said bag cup, whereupon said projections snap into said groove, thereby latching said filter cartridge to said bag cup, and e. clamp means for securing said finger projections in said bag cup groove in latching position.