IP Library › Granted Patent US 12,345,224
Granted Patent B2
US 12,345,224 · App. 18/174,181 · Granted Jul 1, 2025

Muffler and filter system

Inventors: Dennis Stark (Mauer, DE); Michael Kaufmann (Meckenheim, DE); Klaus-Dieter Ruhland (Meckenheim, DE)
Assignee: MANN+HUMMEL GmbH
F02M35/1211
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Quick Facts
Patent No.
US 12,345,224
App. No.
18/174,181
Granted
Jul 1, 2025
Kind
B2
Abstract

A muffler for a filter system has a base body with an inlet opening. A fluid guiding rib is externally arranged on the base body so as to guide a fluid to be filtered by the filter system toward the inlet opening of the base body. The fluid guiding rib extends along a first flow direction, wherein the fluid to be filtered passes through the base body along the first flow direction. A filter system with a filter housing and a filter element removably received in the filter housing is provided with such a muffler. The muffler is attached to the filter housing.

Claims (21)

1. A muffler for a filter system, the muffler comprising:

a base body comprising an inlet opening;

a fluid guiding rib externally arranged on the base body and configured to guide a fluid to be filtered by the filter system from an externo side base body toward the inlet opening of the base body;

wherein the fluid guiding rib extends along the exterior of the base body, and wherein the fluid to be filtered passes through the base body a first flow direction.

2. The muffler according to claim 1 , wherein the fluid guiding rib guides the fluid to be filtered along the exterior side of the base body in a second flow direction, and wherein the second flow direction is oriented opposite to the first flow direction.

3. The muffler according to claim 1 , wherein the base body is constructed with rotational symmetry in relation to a symmetry axis, and wherein the fluid guiding rib extends along the symmetry axis.

4. The muffler according to claim 3 , wherein the inlet opening is rounded by an inlet rounded portion extending circumferentially around the symmetry axis.

5. The muffler according to claim 4 , wherein the inlet rounded portion extends out of the inlet opening to the exterior side of the base body.

6. The muffler according to claim 3 , wherein the base body comprises a truncated cone-shaped inlet comprising the inlet opening and further comprises a truncated cone-shaped outlet, and wherein the inlet and the outlet are arranged such that the inlet passes via a cross section constriction into the outlet.

7. The muffler according to claim 6 , wherein the cross section constriction is rounded by a rounded portion extending circumferentially about the symmetry axis.

8. The muffler according to claim 6 , wherein the outlet, viewed along the symmetry axis, is longer than the inlet.

9. The muffler according to claim 3 , wherein the fluid guiding rib extends radially away from the symmetry axis in an outward direction toward the exterior side of the base body.

10. The muffler according to claim 1 , comprising a plurality of said fluid guiding rib arranged uniformly distributed relative to each other about a circumference of the base body.

11. A filter system comprising:

a filter housing;

a filter element removably received in the filter housing;

a muffler according to claim 1 , the muffler attached to the filter housing.

12. The filter system according to claim 11 , wherein the muffler is connected with form fit to a fluid inlet of the filter housing.

13. The filter system according to claim 11 , wherein an intermediate space is provided between the muffler and the filter element.

14. The filter system according to claim 11 , wherein the muffler and the filter element are two components separate from each other.

15. The filter system according to claim 11 , wherein the muffler is arranged, at least in sections, outside of the filter housing.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 13, 2023
From: STARK, DENNIS; KAUFMANN, MICHAEL; RUHLAND, KLAUS-DIETER
To: MANN+HUMMEL GMBH
Reel/Frame 062961/0197 →
Continuity (2)
Continuation PCTEP2021073276 · Aug 23, 2021
Related Publication 20230220822A1 · Jul 13, 2023
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