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A transmission fluid filter assembly in which the marginal peripheries of two sheet metal housing members are crimped into a plied peripheral structure which includes therein the abutting edge portions of a folded filter media sheet member along three of the four sides thereof. The plied peripheral

A transmission fluid filter assembly in which the marginal peripheries of two sheet metal housing members are crimped into a plied peripheral structure which includes therein the abutting edge portions of a folded filter media sheet member along three of the four sides thereof. The plied peripheral structure is formed by bending a first marginal free edge portion of a first sheet metal member over a second marginal free edge portion of the second sheet metal member in compressing relation with respect to the abutting edge portions of the filter media sheet member. Therafter, the plied peripheral structure is angularly bent intermediate the bent-over outer edge and the free edge of the first marginal edge portion in a direction to form an included angle of 90°between the exterior surface of an outer section and the exterior surface of an inner section of the first marginal edge portion.

대표청구항 ▼

A transmission fluid filter assembly comprising a first sheet metal member having a periphery providing a first marginal free edge portion and an adjacent marginal edge portion, a second sheet metal member having a periphery providing a second marginal free edge portion, a filter media sheet member

A transmission fluid filter assembly comprising a first sheet metal member having a periphery providing a first marginal free edge portion and an adjacent marginal edge portion, a second sheet metal member having a periphery providing a second marginal free edge portion, a filter media sheet member folded so as to define a periphery providing a folded edge portion and remaining abutting edge portions, said members being assembled with the second marginal free edge portion of said second sheet metal member disposed in generally coextensive facing relation with the adjacent marginal edge portion of said first sheet metal member and with the remaining abutting edge portions of said filter media sheet member between said coextensive marginal portions and the folded edge portion of said filter media sheet member disposed within said coextensive marginal portions, the first marginal free edge portion of said first sheet metal member being bent over the second marginal free edge portion of said second sheet metal member in compressing relation with respect to the remaining abutting edge portions of said filter media sheet member so as to form a plied peripheral structure, said plied peripheral structure being angularly bent intermediate the bent over outer edge and the free edge of said first marginal free edge portion in a direction toward the second sheet metal member to form an angularly bent portion, said angularly bent portion being at an angle with the folded edge portion of the filter media sheet member, said angle being sufficient to cause the bias imparted to said first marginal free edge portion by said angular bend to act in such a way as to increase the interengagement of the angularly bent plied peripheral structure enabling the angularly bent plied peripheral structure to provide a fluidtight peripheral seal within the angularly bent plied peripheral structure without the use of a separate resilient sealing element, and means for directing a fluid to be filtered into the interior space defined by the filter media sheet member within the folded edge portion thereof and the remaining abutting edge portions thereof compressed within said angularly bent plied peripheral structure and out of the space between the interior of said sheet metal members and the exterior of said filter media sheet member within the angularly bent plied peripheral structure after having passed through said filter media sheet member.