Granted Patent
E1
US 50,860 · App. 18/140,773 · Granted Apr 14, 2026
Filter with variable cross-section axial seal
Assignee:
ATMUS FILTRATION IP INC.
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Abstract
Filtration systems having filter elements having an axial seal member with a variable cross-section are described. The variable cross-section is matched by the non-planar sealing surfaces of the housing and housing cover that receive the filter elements. The non-planar sealing surfaces of the housing and the housing cover prevent proper filtration system function when an unauthorized replacement filter element having a flat axial seal member is installed in the housing.
Claims (25)
1 . A filtration system, comprising:
a housing defining a central compartment therein, the housing including an outlet and a housing sealing surface, the housing sealing surface being non-planar;
a cover removably coupled to the housing, the cover including an inlet and a cover sealing surface; and
a filter element positioned within the central compartment of the housing, the filter element including filter media and a seal member coupled to the filter media and circumscribing at least a portion of the filter media, the seal member including a first sealing surface and a second sealing surface, the first sealing surface has an arc-shaped profile extending from a first end of the seal member to a second end of the seal member, the second sealing surface has an opposite arc-shaped profile extending from the first end of the seal member to the second end of the seal member, each arc-shaped profile defines a convex arc shape comprising a continuous curve between the first end and the second end, the seal member having a variable cross-section such that, at a perimetral distance from the filter media, an axial distance between the first sealing surface and the second sealing surface varies along at least a portion of the seal member, the variable cross-section being complementary to the housing sealing surface and the cover sealing surface such that the seal member forms an axial seal between the housing and the cover when the filter element is installed in the air filtration system.
2 . The filtration system of claim 1 , wherein each arc-shaped profile has a height that is smaller than a span distance such that a ratio of the span distance to the height is greater than 10 to 1.
3 . The filtration system of claim 2 , wherein the ratio of the span distance to the height is greater than 50 to 1.
4 . The filtration system of claim 2 , wherein the opposite arc-shaped profile extends the span distance and has the height that is smaller than the span distance.
5 . The filtration system of claim 4 , wherein the cover sealing surface is non-planar.
6 . The filtration system of claim 1 , wherein the filter element is a cylindrical filter element, and wherein the seal member is ring shaped.
7 . The filtration system of claim 1 , wherein the seal member is substantially rectangular in shape.
8 . The filtration system of claim 1 , and wherein the distance between the first sealing surface and the second sealing surface varies along only one of four sides of the seal member.
9 . The filtration system of claim 1 , and wherein the distance between the first sealing surface and the second sealing surface varies along at least two of four sides of the seal member.
10 . The filtration system of claim 1 , wherein the first sealing surface and the second sealing surface are on opposing sides of the seal member.
11 . A filter element comprising:
filter media; and
a seal member coupled to the filter media and circumscribing at least a portion of the filter media, the seal member comprising a first sealing surface and a second sealing surface, the first sealing surface has an arc-shaped profile extending from a first end of the seal member to a second end of the seal member, the second sealing surface has an opposite arc-shaped profile extending from the first end of the seal member to the second end of the seal member, each arc-shaped profile defines a convex arc shape comprising a continuous curve between the first end and the second end, the seal member having a variable cross-section such that, at a perimetral distance from the filter media, an axial distance between the first sealing surface and the second sealing surface varies along at least a portion of the seal member.
12 . The filter element of claim 11 , wherein each arc-shaped profile has a height that is smaller than a span distance such that a ratio of the span distance to the height is greater than 10 to 1.
13 . The filter element of claim 12 , wherein the ratio of the span distance to the height is greater than 50 to 1.
14 . The filter element of claim 12 , wherein the opposite arc-shaped profile extends the span distance and has the height that is smaller than the span distance.
15 . The filter element of claim 14 , wherein the cover sealing surface is non-planar.
16 . The filter element of claim 11 , wherein the filter element is a cylindrical filter element, and wherein the seal member is ring shaped.
17 . The filter element of claim 11 , wherein the seal member is substantially rectangular in shape.
18 . The filter element of claim 11 , and wherein the distance between the first sealing surface and the second sealing surface varies along only one of four sides of the seal member.
19 . The filter element of claim 11 , and wherein the distance between the first sealing surface and the second sealing surface varies along at least two of four sides of the seal member.
20 . The filter element of claim 11 , wherein the first sealing surface and the second sealing surface are on opposing sides of the seal member.
Assignments (2)
CHANGE OF NAME
Recorded Nov 11, 2025
From: CUMMINS FILTRATION IP, INC.
To: ATMUS FILTRATION IP INC.
Reel/Frame 073563/0277 →
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Oct 31, 2025
From: TOFSLAND, KEN
To: CUMMINS FILTRATION IP, INC.
Reel/Frame 072751/0334 →
Continuity (2)
Provisional Application
62266219
· Dec 11, 2015
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