# US 10,308,279 B2 · Fluid container in particular hydraulic tank for a motor pump unit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,308,279 B2 - Document ID: US10308279B2 - Status: Granted - Kind: B2 - Application number: 14/427,030 - Filed: 2013-09-10 - Published: 2015-08-27 - Granted: 2019-06-04 - Earliest claimed: 2012-09-10 - Assignees: TRW Automotive GmbH - Applicants: TRW Automotive GmbH - Inventors: Michael Moczala; Gilbert Hesmer - Web page: https://patentgrep.com/patent/US10308279B2 ## CPC - B62D 5/07: Supply of pressurised fluid for steering also supplying other consumers {; control thereof} - B62D 5/062: {Details, component parts} - B62D 5/064: {Pump driven independently from vehicle engine, e.g. electric driven pump (B62D5/065 takes precedence)} - F15B 1/26: Supply reservoir or sump assemblies - F15B 21/047: Preventing foaming, churning or cavitation - Y10T 137/85978: With pump - B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M) - F15B: SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A fluid container, in particular a hydraulic tank for a motor pump unit, has an equalizing chamber that is adapted to contain a supply of fluid and air, and at least one return chamber into which a return flow of the fluid can flow, a fluid communication being provided between the return chamber and the equalizing chamber. The return chamber is provided with a suction port for a pump, in particular of the motor pump unit. ## Claims ### Claim 1 A fluid container for a motor pump unit comprising: an equalizing chamber that is adapted to contain a supply of fluid and air; and at least one return chamber into which a return flow of the fluid can flow, wherein fluid communication is provided between the return chamber and the equalizing chamber, the return chamber is provided with a suction port for a pump of the motor pump unit, the return chamber is subdivided into a return flow chamber, into which a return port of a hydraulic circuit supplied by the pump opens, and a valve flow chamber, into which an overpressure port of a pressure relief valve of the pump opens, and the return flow chamber and the valve flow chamber are high fluid velocity areas that are each separated by a flow restrictor from a low fluid velocity area of the equalizing chamber, wherein the suction port of the pump is arranged directly within the return chamber. ### Claim 2 (depends on 1) The fluid container according to claim 1 wherein the chambers are delimited from one another by chamber walls that have at least one flow restrictor provided therein that is arranged between the chambers. ### Claim 3 (depends on 1) The fluid container according to claim 1 wherein the chambers are delimited from one another by chamber walls that project into the fluid. ### Claim 4 (depends on 1) The fluid container according to claim 1 wherein at least one of the return flow chamber and the valve flow chamber has a vent opening. ### Claim 5 (depends on 4) The fluid container according to claim 4 wherein the return flow chamber includes a flow guiding element that directs a partial flow from the return flow chamber into the equalizing chamber. ### Claim 6 (depends on 1) The fluid container according to claim 1 wherein the return chamber includes at least one flow guiding element that directs the return flow toward the suction port for the pump. ### Claim 7 A fluid container for a motor pump unit comprising: an equalizing chamber that is adapted to contain a supply of fluid and air, and at least one return chamber into which a return flow of the fluid can flow, wherein fluid communication is provided between the return chamber and the equalizing chamber, the return chamber is subdivided into a return flow chamber, into which a return port of a hydraulic circuit supplied by a pump of the motor pump unit opens, and a valve flow chamber, into which an overpressure port of a pressure relief valve of the pump of the motor pump unit opens, and the return flow chamber and the valve flow chamber have separate suction ports for the pump of the motor pump unit arranged therein, wherein the suction port of the pump is arranged directly within the return chamber. ### Claim 8 (depends on 7) The fluid container according to claim 7 wherein the chambers are delimited from one another by chamber walls that have at least one flow restrictor provided therein that is arranged between the chambers. ### Claim 9 (depends on 7) The fluid container according to claim 7 wherein the chambers are delimited from one another by chamber walls that project into the fluid. ### Claim 10 (depends on 7) The fluid container according to claim 7 wherein at least one of the return flow chamber and the valve flow chamber has a vent opening. ### Claim 11 (depends on 10) The fluid container according to claim 10 wherein the return flow chamber includes a flow guiding element that directs a partial flow from the return flow chamber into the equalizing chamber. ### Claim 12 (depends on 7) The fluid container according to claim 7 wherein the return chamber includes at least one flow guiding element that directs the return flow toward the suction port for the pump. ### Claim 13 A fluid container for a motor pump unit comprising: an equalizing chamber that is adapted to contain a supply of fluid and air, and at least one return chamber into which a return flow of the fluid can flow, wherein fluid communication is provided between the return chamber and the equalizing chamber, the return chamber is provided with a suction port for a pump of the motor pump unit, the return chamber is subdivided into a return flow chamber, into which a return port of a hydraulic circuit supplied by the pump opens, and a valve flow chamber, into which an overpressure port of a pressure relief valve of the pump opens, and the valve flow chamber includes a vent opening that is applied in a chamber wall that separates the valve flow chamber from the equalizing chamber, wherein the suction port of the pump is arranged directly within the return chamber. ### Claim 14 (depends on 13) The fluid container according to claim 13 wherein the chambers are delimited from one another by chamber walls that have at least one flow restrictor provided therein that is arranged between the chambers. ### Claim 15 (depends on 13) The fluid container according to claim 13 wherein the chambers are delimited from one another by chamber walls that project into the fluid. ### Claim 16 (depends on 13) The fluid container according to claim 13 wherein the return flow chamber has a vent opening. ### Claim 17 (depends on 16) The fluid container according to claim 16 wherein the return flow chamber includes a flow guiding element that directs a partial flow from the return flow chamber into the equalizing chamber. ### Claim 18 (depends on 13) The fluid container according to claim 13 wherein the vent opening is arranged at an elevated point of the chamber wall. ### Claim 19 (depends on 13) The fluid container according to claim 13 wherein the vent opening extends over a partial height or the entire height of the chamber wall. ### Claim 20 (depends on 13) The fluid container according to claim 13 wherein the return chamber includes at least one flow guiding element that directs the return flow toward the suction port for the pump.