Indexable dispenser cartridges

An indexable universal cartridge for controllable delivery of a dispersant in either an open or a closed fluid system comprising:

• a housing having a chamber therein for carrying a dispensing material, said housing having one or more diffusion ports therein to permit diffusion of a dispensing material from said chamber;
• a sleeve, having one or more diffusion ports therein and said sleeve having one or more circumferentially extending relief slots;
• a first sealing rib extended radially inward proximate an opening in said sleeve with the first sealing rib extending radially away from said sleeve with said first sealing rib having an end in face-to-face engagement with an outer surface of the housing to maintain the housing in a spaced condition from the sleeve while integrally forming a portion of a one side of said one or more diffusion ports of said sleeve and a second sealing rib extended radially inward proximate an opening in said sleeve with the second sealing rib extending radially away from said sleeve with said second sealing rib having an end in face-to-face engagement with an outer surface of the housing to maintain the housing in a spaced condition from the sleeve while integrally forming a portion of an other side of said one or more of said diffusion ports of said sleeve, said first sealing rib and said second sealing rib each having an end extending into frictional contact with said housing and said first sealing rib said second sealing rib extending radially to form a gap between the end of each of said sealing ribs and said housing to inhibit lateral fluid transfer past the end of each of the sealing ribs and to encourage fluid transfer through a transport area along a side of each of the ribs formed by an alignment of the one or more of the diffusion ports in said housing and the one or more of the diffusion ports in said sleeve;
• a third sealing rib extended radially inward proximate a further opening in said sleeve with the third sealing rib extending radially away from said sleeve with said third sealing rib having an end in face-to-face engagement with an outer surface of the housing to maintain the housing in a spaced condition from the sleeve while integrally forming a further portion of an other side of said one or more diffusion ports of said sleeve and a fourth sealing rib extended radially inward proximate a further opening in said sleeve with the fourth sealing rib extending radially away from said sleeve with said fourth sealing rib having an end in face-to-face engagement with an outer surface of the housing to maintain the housing in a spaced condition from the sleeve while integrally forming a further portion of an other side of said one or more diffusion ports of said sleeve, with said first and second sealing ribs located diametrically opposite from said third sealing rib and said fourth sealing rib to hold the housing and the sleeve in concentric relation with respect to each other;
• an axially resilient yieldable region, said axially resilient yieldable region having an upper axially resilient band located above an indexing slot in the sleeve and a first lower axially resilient band and a second lower axially resilient band located below the indexing slot in the sleeve, said axially resilient yieldable region extending partially around a circumference of the sleeve;
• and
• an index tab, said index tab on said housing and in engagement with a notch located between the upper axially resilient band and the first lower axially resilient band to maintain said housing in an indexed condition with respect to said sleeve while coacting with said sleeve and said housing to provide a visual indication on alignment of the one or more of the diffusion ports of the sleeve with the one or more diffusion ports of the housing to thereby provide an operator with a visual indication of a size of a fluid transfer area between the chamber in the housing and the exterior of the sleeve, at least one of said axially resilient bands of said axially resilient yieldable region yielding in an axial direction when the index tab on the housing moves from a partial circumferential slot in said sleeve to an adjacent circumferential slot during indexing rotation of the sleeve with respect to the housing to change an alignment of the one or more diffusion ports of the housing with the one or more diffusion ports of the sleeve.