Patent ID: 8439204
Filing Date: 2013-05-14
Classification: B01D

Abstract:
1. A drop-in oil filter comprising: a top cap and a bottom cap, both caps having first surfaces that are facingly disposed, second surfaces opposite the first surfaces, and annular recesses on the first surfaces adjacent their outer periphery; a pleated, woven metal cylindrical filter element having an outer and an inner diameter and first and second ends; a first cylindrical wire cage over the outer diameter of the pleated, woven metal cylindrical filter element, the first cylindrical wire cage having first and second ends; a second cylindrical wire cage within the inner diameter of the of pleated, woven metal cylindrical filter element, the second cylindrical wire cage having first and second ends; the first ends of the pleated, woven metal cylindrical filter element and the first and second cylindrical wire cages being fastened into the annular recess in the top cap; the second ends of the pleated, woven metal cylindrical filter element and the first and second cylindrical wire cages being fastened into the annular recess in the bottom cap; the bottom cap having a first opening there through concentric with and within inner diameters of the pleated, woven metal cylindrical filter element and the first and second cylindrical wire cages, the first opening being surrounded by an annular relief in the first and second surfaces of the bottom cap to form a single radially inwardly projecting lip thinner than the surrounding area of the bottom cap; a first elastic grommet within the first opening having a central opening for sealing on a tube within a drop-in filter housing, the central opening being a plain cylindrical surface having a first height, the first elastic grommet having a single annular recess around its outer periphery, the inwardly projecting lip being positioned within the annular recess, the first elastic grommet held by the inwardly projecting lip such that the first elastic grommet extends beyond the second surface of the bottom cap with the first elastic grommet supported against radial displacement by cylindrical walls at an outer periphery of the annular reliefs.