Additive carrier for spin on filters

Abstract

An additive carrier for a spin-on filter is provided. The additive carrier is positioned at an upstream side of the filter and includes a basket defining an annular body. The annular body includes a concentric opening extending therethrough, a circumferentially extending recess configured to receive and store an additive material and a plurality of flanges extending radially within the recess, the flanges spaced apart in a circumferential direction of the recess to form a plurality of sub-recesses.

1 - 20 . (canceled) 
     
     
         21 . An additive carrier for a spin-on filter, the additive carrier comprising:
 a top wall including a retainer-receiving seat, an upper planar surface, and an outer perimeter, the retainer-receiving seat including:
 a bottom wall spaced apart from the upper planar surface and formed to include an opening extending through the bottom wall; and 
 a frustoconical section positioned to extend at least partially around the bottom wall, the frustoconical section extending from the bottom wall to the upper planar surface; and 
   a cylindrical retaining wall coupled to the top wall along the outer perimeter and extending downward from the upper planar surface, the retaining wall defining a plurality of downwardly extending projections and a plurality of gaps that are positioned between adjacent projections, the projections circumferentially spaced around the retaining wall,   wherein the top wall and the retaining wall together define a circumferentially extending bottom recess configured to receive and store an additive material, and the plurality of gaps are in fluid communication with the bottom recess.   
     
     
         22 . The additive carrier of  claim 21 , wherein a plurality of flanges extend radially within the bottom recess and along the top wall, and wherein the flanges are spaced apart in a circumferential direction of the bottom recess to form a plurality of sub-recesses. 
     
     
         23 . The additive carrier of  claim 22 , wherein each gap is in fluid communication with at least one of the sub-recess. 
     
     
         24 . The additive carrier of  claim 23 , wherein a majority of the flanges intersect with the projections of the retaining wall. 
     
     
         25 . The additive carrier of  claim 24 , wherein the flanges extend along the top wall from the bottom wall to the retaining wall. 
     
     
         26 . The additive carrier of  claim 22 , wherein the upper planar surface of the top wall and the bottom wall are spaced apart by a distance, wherein the projections of the retaining wall extend to the distance, and wherein the gaps are formed such that portions of the retaining wall adjacent to the projections extend to less than the distance. 
     
     
         27 . The additive carrier of  claim 26 , wherein the flanges extend from the top wall to the distance. 
     
     
         28 . A spin-on filter comprising:
 a filter assembly;   an additive carrier comprising:
 a top wall including a retainer-receiving seat, an upper planar surface, and an outer perimeter, the retainer-receiving seat including:
 a bottom wall spaced apart from the upper planar surface and formed to include an opening extending through the bottom wall; and 
 a frustoconical section positioned to extend at least partially around the bottom wall, the frustoconical section extending from the bottom wall to the upper planar surface; and 
 
 a cylindrical retaining wall coupled to the top wall along the outer perimeter and extending downward from the upper planar surface, the retaining wall defining a plurality of downwardly extending projections and a plurality of gaps that are positioned between adjacent projections, the projections circumferentially spaced around the retaining wall, 
 wherein the top wall and the retaining wall together define a circumferentially extending bottom recess configured to receive and store an additive material, and the plurality of gaps are in fluid communication with the bottom recess; and 
   a retainer comprising:
 a first end; 
 a second end spaced apart from the first end; 
 a bowl shaped section extending between the first end and the second end; and 
 an aperture formed in the bowl shaped section, 
   wherein the retainer is positioned within the retainer-receiving seat of the additive carrier such that the aperture is concentric with the opening, and the retainer is coupled to the filter assembly to trap the additive carrier relative to the filter assembly.   
     
     
         29 . The spin-on filter of  claim 28 , wherein the additive material is in a solid state. 
     
     
         30 . The spin-on filter of  claim 28 , wherein a plurality of flanges extend radially within the bottom recess and along the top wall, and wherein the flanges are spaced apart in a circumferential direction of the bottom recess to form a plurality of sub-recesses. 
     
     
         31 . The spin-on filter of  claim 30 , wherein each gap is in fluid communication with at least one of the sub-recess.