# US 2010/0147091 A1 · Drive for a coffee brewing device and coffee brewing device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0147091 A1 - Document ID: US20100147091A1 - Status: Published application - Kind: A1 - Application number: 12/633,165 - Filed: 2009-12-08 - Published: 2010-06-17 - Earliest claimed: 2008-12-12 - Assignees: Jura Elektroapparate AG - Inventors: Philipp Büttiker - Web page: https://patentgrep.com/patent/US20100147091A1 ## CPC - A47J 31/3614: {Means to perform transfer from a loading position to an infusing position} - Y10T 74/18648: Carriage surrounding, guided by, and primarily supported by member other than screw [e.g., linear guide, etc.] - A47J: KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The invention relates to a drive for a coffee brewing device that includes a first gearwheel having an internal thread that is pivot-mounted to an external thread of a guide cylinder so that the first gearwheel can be moved along a cylinder axis of the guide cylinder in response to a rotation, a second gearwheel for driving the first gearwheel along the cylinder axis, a housing, and a brewing piston coupled to the housing so that the brewing piston and the first gearwheel can be moved along the cylinder axis. A linear guide running parallel to the cylinder axis is also provided for guiding the housing such that a movement of the housing opposite to the linear guide in a radial direction to the cylinder axis is prevented. An axis of rotation of the second gearwheel is arranged in a provided distance relative to the linear guide. ## Claims ### Claim 1 A drive for a brewing device, comprising: a first gearwheel defining an internal thread, via which said first gearwheel is pivot-mounted on an external thread of a guide cylinder, so that the first gearwheel is configured to move along a cylinder axis of the guide cylinder in response to a rotation; a second gearwheel configured to engage with said first gearwheel to drive the first gearwheel along the cylinder axis; a housing, in which the first gearwheel is accommodated; a brewing piston, which is coupled to the housing, so that said brewing piston is configured to move together with the first gearwheel along the cylinder axis; and a linear guide configured to guide the housing, which runs at a distance parallel to the cylinder axis and with which the housing is engaged such that a movement of the housing opposite to the linear guide in a radial direction to the cylinder axis is prevented, wherein the second gearwheel defines an axis of rotation arranged in a provided distance relative to the linear guide. ### Claim 2 (depends on 1) The drive according to claim 1 further comprising a base, to which a lower end of the linear guide and a lower end of the guide cylinder is rigidly connected. ### Claim 3 (depends on 1) The drive according to claim 1, wherein the linear guide runs on one side of the housing, which faces the second gearwheel. ### Claim 4 (depends on 1) The drive according to claim 1, wherein the linear guide comprises at least one guide rod at least partially encompassed by the housing. ### Claim 5 (depends on 4) The drive according to claim 4, wherein the respective guide rod defines at least one axially running groove configured to engage a projection of the housing. ### Claim 6 (depends on 4) The drive according to claim 4, wherein a lower end of the axis of rotation of the second gearwheel is fastened to the base and an upper end of said axis of rotation is fastened to an extension, which is rigidly connected to at least one of the respective guide rods. ### Claim 7 (depends on 5) The drive according to claim 5, wherein the groove is open in the direction of the second gearwheel. ### Claim 8 (depends on 4) The drive according to claim 4, wherein the respective guide rod has a U-shaped or H-shaped cross sectional profile. ### Claim 9 (depends on 1) The drive according to claim 1, wherein the housing comprises flanges, which are embodied thereon in one piece, via which said housing engages with the linear guide. ### Claim 10 (depends on 1) The drive according to claim 1 further comprising a pivot bearing configured to prevent a radial movement of the housing opposite to the first gearwheel, the pivot bearing disposed between the housing and the first gearwheel. ### Claim 11 (depends on 10) The drive according to claim 10, wherein the pivot bearing is defined by the housing and the first gearwheel. ### Claim 12 (depends on 10) The drive according to claim 10, wherein the pivot bearing is defined by a rotating stop of the housing, against which stop a cylindrical appendage of the first gearwheel abuts. ### Claim 13 (depends on 1) The drive according to claim 1, wherein the housing completely encloses the first gearwheel, with the exception of an opening defined by the housing and configured to allow for the engagement of the second gearwheel with the first gearwheel. ### Claim 14 (depends on 1) The drive according to claim 1, wherein the brewing piston is coupled to the housing via a metal plate, which extends in a plane that runs in a radial direction to the cylinder axis. ### Claim 15 (depends on 14) The drive according to claim 14, wherein the metal plate permeates at least a part of at least one of the housing and the brewing piston. ### Claim 16 (depends on 1) The drive according to claim 1, wherein the first gearwheel and the second gearwheel have a transmission ratio in a range of between approximately 4 and 4.5. ### Claim 17 A brewing device comprising a drive, wherein the drive comprises: a first gearwheel defining an internal thread, via which said first gearwheel is pivot-mounted on an external thread of a guide cylinder, so that the first gearwheel is configured to move along a cylinder axis of the guide cylinder in response to a rotation; a second gearwheel configured to engage with said first gearwheel to drive the first gearwheel along the cylinder axis; a housing, in which the first gearwheel is accommodated; a brewing piston, which is coupled to the housing, so that said brewing piston is configured to move together with the first gearwheel along the cylinder axis; and a linear guide configured to guide the housing, which runs at a distance parallel to the cylinder axis and with which the housing is engaged such that a movement of the housing opposite to the linear guide in a radial direction to the cylinder axis is prevented, wherein the second gearwheel defines an axis of rotation arranged in a provided distance relative to the linear guide. ### Claim 18 (depends on 17) The brewing device according to claim 17, wherein the linear guide of the drive comprises at least one guide rod at least partially encompassed by the housing, and wherein the respective guide rod defines at least one axially running groove configured to engage a projection of the housing. ### Claim 19 (depends on 17) The brewing device according to claim 17, wherein the drive is fastened to a base support via a damping element. ### Claim 20 (depends on 19) The coffee brewing device according to claim 19, wherein the damping element consists of a rubber material.