# US 11,026,772 B2 · Drive train assembly for an oral care device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,026,772 B2 - Document ID: US11026772B2 - Status: Granted - Kind: B2 - Application number: 16/306,141 - Filed: 2017-06-12 - Published: 2020-10-15 - Granted: 2021-06-08 - Earliest claimed: 2016-06-24 - Assignees: Koninklijke Philips N.V. - Applicants: Koninklijke Philips N.V. - Inventors: Arnold Buijs; Jan Willem Bruggers; Johannes Antonius Van Rooij - Web page: https://patentgrep.com/patent/US11026772B2 ## CPC - A61C 17/222: {Brush body details, e.g. the shape thereof or connection to handle} - A61C 17/34: driven by electric motor - A61C 17/3481: {Vibrating brush body, e.g. by using eccentric weights} - A46B 5/0095: {Removable or interchangeable brush heads} - A46B 2200/1066: Toothbrush for cleaning the teeth or dentures (A61C17/16 takes precedence; bristles arrangements for toothbrushes A46B9/04) - A61C 17/221: {Control arrangements therefor} - F16F 1/14: Torsion springs consisting of bars or tubes - A61C: DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE (non-driven toothbrushes A46B; {tongue scrapers A61B17/24;} preparations for dentistry A61K6/00; preparations for cleaning the teeth or mouth A61K8/00, A61Q11/00) - A46B: BRUSHES (handles not integral with brushware B25G) - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION ## Abstract A drive train assembly (22) for an oral care device (10) having a housing (12), comprising: a plurality of elongated leaf springs (50) symmetrically disposed around the circumference of the drive train assembly, each of the plurality of elongated leaf springs secured at both ends; and a ring (46) encircling the plurality of elongated leaf springs, wherein the ring is fixedly connected to each of the plurality of elongated leaf spring assemblies and fixedly connected to the housing of the oral care device. ## Claims ### Claim 1 A drive train assembly for an oral care device, the oral care device having a housing, the drive train assembly comprising: a plurality of elongated leaf spring assemblies symmetrically disposed around the circumference of the drive train assembly, wherein each of the plurality of elongated leaf spring assemblies comprises a leaf spring with a first segment, a second segment, and an additional segment, wherein the additional segment is disposed substantially orthogonal to the first segment and the second segment; a first end mount and a second end mount, wherein the plurality of elongated leaf spring assemblies are secured at a first end to the first end mount and at a second end to the second end mount; and a ring encircling the plurality of elongated leaf springs assemblies, wherein the ring is fixedly connected to each of the plurality of elongated leaf springs assemblies and configured to be fixedly connected to the housing of the oral care device. ### Claim 2 (depends on 1) The drive train assembly of claim 1, further comprising a transmission component configured to engage a brush head member. ### Claim 3 (depends on 1) The drive train assembly of claim 1, wherein the ring is fixedly connected to each of the plurality of elongated leaf springs at approximately a middle of a length of each leaf spring. ### Claim 4 (depends on 1) The drive train assembly of claim 1, wherein the plurality of leaf spring assemblies comprises three symmetrical leaf spring assemblies. ### Claim 5 (depends on 1) The drive train assembly of claim 1, wherein the plurality of elongated leaf springs comprise titanium. ### Claim 6 (depends on 1) The drive train assembly of claim 1, wherein the drive train assembly comprises a single integral component manufactured by 3D printing. ### Claim 7 (depends on 1) A 3D-printed drive train assembly comprising the drive train assembly of claim 1, further comprising: a transmission component extending from the second end mount and configured to engage a head member; wherein the ring encircling the plurality of elongated leaf spring assemblies, is fixedly connected to each of the plurality of elongated leaf spring assemblies at approximately the middle of the length of each leaf spring. ### Claim 8 An oral care device comprising: a housing; and a drive train assembly comprising a plurality of elongated leaf spring assemblies symmetrically disposed around the circumference of the drive train assembly, wherein each of the plurality of elongated leaf spring assemblies comprises a leaf spring with a first segment, a second segment, and an additional segment, wherein the additional segment is disposed substantially orthogonal to the first segment and the second segment; a first end mount and a second end mount, wherein the plurality of elongated leaf spring assemblies are secured at a first end to the first end mount and at a second end to the second end mount; and a ring encircling the plurality of elongated leaf spring assemblies, wherein the ring is fixedly connected to each of the plurality of elongated leaf spring assemblies and fixedly connected to the housing of the oral care device. ### Claim 9 (depends on 8) The oral care device of claim 8, wherein the drive train assembly further comprises a transmission component configured to engage a brushhead assembly. ### Claim 10 (depends on 8) The oral care device of claim 8, wherein the ring is fixedly connected to each of the plurality of elongated leaf springs at approximately a middle of a length of each leaf spring. ### Claim 11 (depends on 8) The oral care device of claim 8 wherein the plurality of leaf springs comprises three symmetrical leaf spring assemblies. ### Claim 12 (depends on 8) The oral care device of claim 8 wherein the plurality of elongated leaf springs comprise titanium. ### Claim 13 (depends on 8) The oral care device of claim 8, wherein the drive train assembly comprises a single integral component manufactured by 3D printing. ### Claim 14 A drive train assembly for an oral care device, the oral care device having a housing, the drive train assembly comprising: a plurality of elongated leaf spring assemblies symmetrically disposed around the circumference of the drive train assembly, wherein each of the plurality of elongated leaf spring assemblies comprises a leaf spring with a first segment and a second segment; a first end mount secured directly to the first segment and a second end mount secured directly to the second segment; and a ring encircling the plurality of elongated leaf springs assemblies, wherein the ring is fixedly connected to each of the plurality of elongated leaf springs assemblies and configured to be fixedly connected to the housing of the oral care device.