# US 11,306,731 B2 · Fan bodies with pressure regulating chambers > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,306,731 B2 - Document ID: US11306731B2 - Status: Granted - Kind: B2 - Application number: 17/011,010 - Filed: 2020-09-03 - Published: 2022-03-03 - Granted: 2022-04-19 - Earliest claimed: 2020-09-03 - Assignees: Hewlett-Packard Development Company, L.P. - Applicants: Hewlett-Packard Development Company, L.P. - Inventors: Shih-Han Chen; Hung-Wen Chang; Ai-Tsung Li - Web page: https://patentgrep.com/patent/US11306731B2 ## CPC - F04D 29/4226: {Fan casings} - F04D 27/002: {by varying geometry within the pumps, e.g. by adjusting vanes} - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) ## Abstract Examples herein relate to fan bodies with pressure regulating chambers. For instance, in some examples a fan body can define an outlet, an inlet, a fan chamber that is in fluidic communication with the inlet and the outlet, and a hollow pressure regulating chamber having an opening that is in fluidic communication with the fan chamber. ## Claims ### Claim 1 A fan body, comprising: a surface defining a fan chamber having volume that extends from an inlet of the fan chamber to an outlet of the fan chamber; and a hollow pressure regulating chamber extending into the surface defining the fan chamber to provide an additional volume and having an opening to the additional volume of the hollow pressure regulating chamber that is in fluidic communication with the volume of the fan chamber to permit fluid flow between the volume of the fan chamber and the additional volume to regulate a pressure of fluid in the volume of the fan chamber. ### Claim 2 (depends on 1) The fan body of claim 1, wherein the hollow pressure regulating chamber is elongated. ### Claim 3 (depends on 1) The fan body of claim 1, wherein the hollow pressure regulating chamber is in fluidic communication with the fan chamber without any intervening components between the hollow pressure regulating chamber and the fan chamber. ### Claim 4 (depends on 1) The fan body of claim 1, wherein the hollow pressure regulating chamber is concentric to the fan chamber curved. ### Claim 5 (depends on 1) The fan body of claim 1, wherein the hollow pressure regulating chamber includes an inner surface defining the additional volume of the hollow pressure regulating chamber. ### Claim 6 (depends on 5) The fan body of claim 5, wherein the additional volume of the hollow pressure regulating chamber is less than the volume of the fan chamber. ### Claim 7 (depends on 1) The fan body of claim 1, wherein the opening of the hollow pressure regulating chamber is adjacent to a fluid flow path extending from the inlet of the fan chamber to the outlet of the fan chamber and extends laterally into the surface defining the fan chamber. ### Claim 8 A fan comprising: a fan body including a surface defining a fan chamber having volume that extends from an inlet of the fan chamber to an outlet of the fan chamber: and a hollow pressure regulating chamber extending into the surface defining the fan chamber to provide an additional volume in addition to the volume of the fan chamber, and having an opening that is positioned adjacent to a fluid flow path extending from the inlet of the fan chamber to the outlet of the fan chamber and is in fluidic communication with the volume of the fan chamber to permit fluid to flow between the volume of the fan chamber and the additional volume to regulate a pressure of fluid in the volume of the fan chamber; and a rotational element disposed in the fan chamber. ### Claim 9 (depends on 8) The fan of claim 8, wherein: a first distal end of the hollow pressure regulating chamber is located a first distance from a distal portion of the rotational element; and a second distal end of the hollow pressure regulating chamber is located a second distance from the distal portion of the rotation element, and wherein the first distance is greater than or equal to the second distance. ### Claim 10 (depends on 9) The fan of claim 9, wherein the first distance is greater than the second distance. ### Claim 11 (depends on 10) The fan of claim 10, wherein the first distance is less than or equal to four times the second distance. ### Claim 12 (depends on 8) The fan of claim 8, wherein a width of the opening of the hollow pressure regulating chamber is less than a length of the hollow pressure regulating chamber. ### Claim 13 (depends on 12) The fan of claim 12, wherein the length of the hollow pressure regulating chamber is in a range from 1.5 to 5.0 times the width of the opening. ### Claim 14 (depends on 8) The fan of claim 8, wherein the hollow pressure regulating chamber is concentric to the fan chamber. ### Claim 15 An electronic device comprising: a heat-generating component; and a fan including: a fan body having a surface defining a volume of a fan chamber extending from an inlet of the fan chamber to an outlet of the fan chamber; a curved hollow pressure regulating chamber extending into the surface defining the fan chamber to provide an additional volume in addition to the volume of the fan chamber, and having an opening that is positioned along a fluid flow path extending from the inlet of the fan chamber to the outlet of the fan chamber that is in fluidic communication with the volume of the fan chamber and the additional volume to permit fluid flow between the volume of the fan chamber and the additional volume to regulate a pressure of fluid in the volume of the fan chamber, wherein the curved hollow pressure regulating chamber extends into the surface of the fan chamber in a direction that is substantially opposite of a direction of the fluid flow path; and a rotational element disposed in the fan chamber to receive a fluid via the inlet of the fan chamber and cause the fluid to flow along the fluid flow path to the outlet of the fan chamber. ### Claim 16 (depends on 15) The electronic device of claim 15, wherein the opening of the curved hollow pressure regulating chamber is adjacent to the fluid flow path. ### Claim 17 (depends on 15) The electronic device of claim 15, wherein the curved hollow pressure regulating chamber is concentric to the fan chamber.