# US 2014/0196979 A1 · Pulsation Damper > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0196979 A1 - Document ID: US20140196979A1 - Status: Published application - Kind: A1 - Application number: 14/152,214 - Filed: 2014-01-10 - Published: 2014-07-17 - Earliest claimed: 2013-01-11 - Assignees: Mann+Hummel GmbH - Applicants: Mann+Hummel GmbH - Inventors: Matthias Teschner; Panagiotis Giagounidis; Helge Krempels; Siegfried Herkommer - Web page: https://patentgrep.com/patent/US20140196979A1 ## CPC - F16F 9/44: Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction (F16F9/53, {F16F13/26} take precedence; temperature correction only F16F9/52) - F16L 55/041: {specially adapted for preventing vibrations (flexible pipe connections F16L27/10)} - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION - F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL ## Abstract A pulsation damper (1) for damping pressure pulsations of a fluid is insertable into the fluid line as intermediate piece by forming an axial flow channel (3), and the pulsation damper (1) featuring a housing (2). The pulsation damper (1) is characterized by the fact that the housing (2) has at least one hollow space (23) communicating with the flow channel (3) and in which at least one attenuator (4) is disposed movably in axial direction. ## Claims ### Claim 1 A pulsation damper for damping fluid pressure pulsations of a fluid in a fluid line, comprising: a housing enclosing and defining at least one hollow space therein, the housing having an inlet port and an outlet port; an axial flow channel extending through opposing sides of the housing fluidically connecting the inlet port and the outlet port for flow, the axial flow channel extending through the at least one hollow space, the hollow space fluidically communicating with the flow channel; at least one attenuator member disposed movably in axial direction within the at least one hollow space; wherein the at least one attenuator member defines a portion of the axial flow channel. ### Claim 2 (depends on 1) The pulsation damper according to claim 1, wherein the housing is at least sectionwise cylindrical; wherein the at least one attenuator member has an external diameter is at least sectionwise substantially equal to a diameter of the hollow space of the housing. ### Claim 3 (depends on 1) The pulsation damper according to claim 1, wherein the flow channel is enclosed coaxially by the housing hollow space and the at least one attenuator member. ### Claim 4 (depends on 1) The pulsation damper according to claim 1, wherein interior walls of the at least one attenuator member form a portion of a circumferential flow channel wall over a length of the axial flow channel; wherein the axial flow channel has a cross sectional area along its length that is substantially constant. ### Claim 5 (depends on 1) The pulsation damper according to claim 1, wherein the at least one attenuator member is of a high density metallic material. ### Claim 6 (depends on 1) The pulsation damper according to claim 1, further comprising a resilient element operable to exert an axial force on the at least one attenuator member in an axial upstream direction relative to fluid flow in the flow channel; wherein the resilient element is a spring-loaded element. ### Claim 7 (depends on 1) The pulsation damper according to claim 1, further comprising a spacer arranged in the housing between the at least one attenuator member and an interior wall of the housing, the spacer ensuring that a gap between the at least one attenuator member and the interior wall limiting the hollow space in axial upstream direction is observed. ### Claim 8 (depends on 1) The pulsation damper according to claim 1, wherein the hollow space has a first section along an axial length of the hollow space having a first external diameter; wherein the hollow space has a second section along an axial length of the hollow space having a second external diameter, the second external diameter smaller than the first external diameter; wherein the second section is disposed downstream of the first section. ### Claim 9 (depends on 1) The pulsation damper according to claim 1, wherein a gap generated between the first section of the at least one attenuator and interior housing wall area defining the first section of the hollow space in axial direction is substantially equal to a width of a gap generated between the second section of the at least one attenuator and an interior housing wall area defining a second section of the hollow space in axial direction. ### Claim 10 (depends on 1) The pulsation damper according to claim 1, wherein the at least one attenuator member is at least two attenuator members arranged face to face, one after the other in the axial direction of the flow channel within the at least one hollow space. ### Claim 11 (depends on 1) An oil module for the introduction into an oil-circulation system of an internal combustion, comprising: an oil filter; at least one pulsation damper according to claim 1 integrated into the oil module. ### Claim 12 (depends on 1) A method of damping pressure pulsations of a fluid flowing in a fluid line, comprising: providing a pulsation dampener according to claim 1, including at least one attenuator member disposed movably in axial direction within a hollow space of a housing; transforming hydraulic energy of pressure pulsations in the fluid into kinetic energy of the at least one attenuator; converting the kinetic energy of the at least one attenuator into dissipation energy.