초록 ▼

A fluid filter includes a base plate, a canister, and filtering media contained in the canister for filtering fluid from an inlet port to an outlet port. Notches are formed into an outer periphery of the base plate. An annular bead of the canister side wall is partially formed into the notches to pr

A fluid filter includes a base plate, a canister, and filtering media contained in the canister for filtering fluid from an inlet port to an outlet port. Notches are formed into an outer periphery of the base plate. An annular bead of the canister side wall is partially formed into the notches to provide a torque locking mechanism between the base plate and the canister. The terminating lip portion of the canister is wrapped around the outer face of the base plate and formed into an annular trough to directly secure the base plate to the canister. The annular trough includes a diverging outer wall that provides a narrow contact interface between the terminating lip portion and the retention corner of the base plate to thereby reduce moment loads induced therebetween as a result of high fluid pressures in the filter.

대표청구항 ▼

What is claimed is: 1. A filter, comprising: a base plate formed of cast material, the base plate having an outer rim, an inner hub and a plurality of ribs connecting the inner hub and outer rim, the inner hub defining a threaded opening providing a first fluid port, a second fluid port being defin

What is claimed is: 1. A filter, comprising: a base plate formed of cast material, the base plate having an outer rim, an inner hub and a plurality of ribs connecting the inner hub and outer rim, the inner hub defining a threaded opening providing a first fluid port, a second fluid port being defined between the inner hub, the outer rim and the ribs; a canister having a generally cylindrical sidewall portion and a closed dome end portion; the sidewall portion extending from a closed dome end portion around an outer periphery of the base plate with the sidewall portion secured to the base plate; filtering media contained in the canister and interposed along a flow path extending between the first and second fluid ports; at least one notch formed into the outer periphery of the base plate; and a locking portion of the sidewall portion being formed radially inwardly into locking engagement with the at least one notch. 2. The filter of claim 1, wherein the at least one notch comprises a plurality of notches disposed radially around the outer periphery of the base plate, and wherein the locking portion is formed via a continuous bead formed into the sidewall portion. 3. The filter of claim 2, further comprising an annular groove formed into the outer periphery of the base plate, and an annular seal in the groove sealing between the sidewall portion and the base plate. 4. The filter of claim 3, wherein the base plate comprises an exterior face and an interior face, the cast material of the base plate defined axially between the exterior and interior faces, and wherein notches are formed into the interior face. 5. The filter of claim 4, wherein each of said notches has a generally planar bottom and arch shaped side. 6. The filter of claim 1, wherein the sidewall includes a terminating annular lip portion defining an annular terminating edge, the annular lip portion being wrapped radially inward over the base plate to secure the canister to the base plate. 7. A filter for removable connection to a mounting adaptor of a fluid circuit, comprising: a base plate having thread means for removable mounting to the mounting adaptor, and the base plate having port means for inletting and outletting fluid into and out of the filter; a canister having an annular sidewall and a closed end portion, the annular side wall extending from the closed end portion to the base plate, the sidewall including an annular terminating lip portion wrapped around an outer periphery of the base plate; filtering means comprising filtering media contained in the canister for filtering fluid; at least one notch formed into the outer periphery of the base plate; and a locking portion of the sidewall being formed radially inwardly into locking engagement with the at least one notch. 8. The filter of claim 7, wherein the at least one notch comprises a plurality of notches disposed radially around the outer periphery of the base plate. 9. The filter of claim 8, wherein the locking portion is formed via a continuous annular bead formed into the sidewall portion. 10. The filter of claim 9, further comprising an annular groove formed into the outer periphery of the base plate, and a seal in the groove sealing between the sidewall and the base plate. 11. The filter of claim 10, wherein the base plate comprises an exterior face and an interior face, a body of the base plate defined axially between the exterior and interior faces, and wherein notches are formed into the interior face. 12. The filter of claim 11, wherein each of said notches has a generally planar bottom and a generally arch shaped side. 13. The filter of claim 7, wherein the sidewall includes an annular lip portion defining a terminating annular edge, the annular lip portion being wrapped radially inward over the base plate to secure the canister to the base plate. 14. A filter, comprising: a base plate having port means for inletting and outletting fluid into and out of the filter; a canister having an annular sidewall and a closed end portion, the annular side wall extending axially from the closed end portion to the base plate, the sidewall extending around an outer periphery of the base plate, the sidewall including an annular terminating lip portion wrapped radially inward over the base plate; filtering means comprising filtering media contained in the canister for filtering fluid; an annular trough formed into the base plate along an exterior surface thereof, the annular trough having a bottom, an inside annular wall, and an outside annular wall, the outside annular wall diverging outwardly from the bottom in a substantially oblique manner relative to the annular sidewall of the filter to form an outer peripheral retention corner at an outer periphery of the end plate; and the terminating lip portion engaging the retention corner to directly secure the canister to the base plate and including a free terminating annular end portion projecting radially inwardly. 15. The filter of claim 14, wherein the annular trough defines a geometry that includes an axis measured from the bottom to an inner point of contact between the retention corner and the terminating lip portion, the axis forming an acute angle of greater than about 35 degrees relative to an axial axis of the sidewall. 16. The filter of claim 15, wherein said angle is greater than about 50 degrees. 17. The filter of claim 14, wherein the end plate is circular, and wherein the annular lip portion contacts the outer peripheral retention corner along a contact interface that is less than 0.07 inches in radial width. 18. The filter of claim 17, wherein the contact interface is less than 0.05 inches in radial width. 19. The filter of claim 18, wherein the contact interface is less than about 0.03 inches in radial width. 20. The filter of claim 14, wherein the base plate is formed of cast material, the base plate having an outer rim and an inner hub and a plurality of ribs connecting the inner hub and outer rim, the inner hub defining a threaded opening providing a first fluid port and second fluid ports being defined between the inner hub, the outer rim and the ribs. 21. The filter of claim 20, further comprising an inner annular seal compressed between the base plate and the sidewall, and an exterior annular seal mounted to the end plate. 22. The filter of claim 14, wherein the free end portion extends into the trough but stops short of the inside annular wall.