# US 10,312,785 B2 · Domestic appliance > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,312,785 B2 - Document ID: US10312785B2 - Status: Granted - Kind: B2 - Application number: 15/771,439 - Filed: 2016-10-28 - Published: 2018-11-08 - Granted: 2019-06-04 - Earliest claimed: 2015-10-29 - Assignees: Sysko Corporation - Applicants: Sysko AG - Inventors: Norbert Helbling; Michael Wisskirchen; Fred Partzsch - Web page: https://patentgrep.com/patent/US10312785B2 ## CPC - H02K 33/10: wherein the alternate energisation and de-energisation of the single coil system is effected or controlled by movement of the armatures - A47J 31/468: {Pumping means} - F04B 17/046: {the fluid flowing through the moving part of the motor} - H01F 7/1615: {Armatures or stationary parts of magnetic circuit having permanent magnet} - H01F 2007/086: {Structural details of the armature} - H02K 2201/12: Transversal flux machines - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - A47J: KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES - F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F) - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ## Abstract A domestic appliance, in particular a beverage dispenser machine, with a beverage pump having at least one pole sleeve for conducting a magnetic flux generated by a magnetic actuator, wherein the pole sleeve has, along a main flow direction of the liquid, a substantially changing magnetic permeability, wherein the pole sleeve has a reduced magnetic permeability in an axial edge region. ## Claims ### Claim 1 A domestic appliance, comprising: a beverage pump configured to convey a liquid, the beverage pump comprises a magnetic actuator, a working piston, a pump chamber in which the working piston is guided, and a pole sleeve for conducting a magnetic flux generated by the magnetic actuator, wherein the pole sleeve has, along a main flow direction of the liquid, a substantially changing magnetic permeability, and the pole sleeve has a reduced magnetic permeability in an axial edge region. ### Claim 2 (depends on 1) The domestic appliance according to claim 1, wherein the pole sleeve has a reduced effective wall material volume in its axial edge region. ### Claim 3 (depends on 1) The domestic appliance according to claim 1, wherein the axial edge region of the pole sleeve is embodied in a sinuate manner. ### Claim 4 (depends on 1) The domestic appliance according to claim 1, wherein the pole sleeve has a reduced wall thickness in the axial edge region. ### Claim 5 (depends on 1) The domestic appliance according to claim 1, wherein the pole sleeve has a basis wall thickness with respect to which the wall thickness is reduced in the axial edge region. ### Claim 6 (depends on 1) The domestic appliance according to claim 1, wherein the beverage pump comprises at least one further pole sleeve, which is arranged in such a way that it is spaced apart from the pole sleeve by a gap. ### Claim 7 (depends on 1) The domestic appliance according to claim 1, wherein the pole sleeve has an axial section profile derived from a force-displacement characteristic. ### Claim 8 (depends on 7) The domestic appliance according to claim 7, wherein the axial section profile comprises at least one slope and/or a multiple stepping. ### Claim 9 (depends on 7) The domestic appliance at least according to claim 7, wherein the axial section profile comprises at least one slope, which includes an angle of no more than 30 degrees with a middle axis of the pole sleeve. ### Claim 10 (depends on 7) The domestic appliance at least according to claim 7, wherein the axial section profile comprises at least one section having a constant reduced wall thickness and having an axial extension of at least 2 mm. ### Claim 11 (depends on 7) The domestic appliance at least according to claim 7, wherein the axial section profile comprises at least one step, which has a height of at least 0.2 mm. ### Claim 12 (depends on 7) The domestic appliance at least according to claim 7, wherein the axial section profile comprises at least one step on an inner perimeter. ### Claim 13 (depends on 1) The domestic appliance according to claim 1, wherein the axial edge region has an axial extension with a value of at least 2 mm. ### Claim 14 (depends on 1) The domestic appliance according to claim 1, wherein the axial edge region has an axial extension with a value of maximally 10 mm. ### Claim 15 (depends on 1) The domestic appliance according to claim 1, wherein the pole sleeve has a constant inner diameter at least in the axial edge region. ### Claim 16 (depends on 1) The domestic appliance according to claim 1, further comprising a pump chamber wall that defines the pump chamber, wherein the pole sleeve surrounds the pump chamber wall to encompass the pump chamber. ### Claim 17 (depends on 16) The domestic appliance according to claim 16, wherein the pump chamber wall is a piston guidance. ### Claim 18 (depends on 1) The domestic appliance according to claim 1, wherein the pole sleeve is arranged outside the pump chamber, which is defined by a pump chamber wall, wherein the pole sleeve abuts the pump chamber wall.