# US 2014/0194242 A1 · Ball type cvt/ivt including planetary gear sets > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0194242 A1 - Document ID: US20140194242A1 - Status: Published application - Kind: A1 - Application number: 14/017,054 - Filed: 2013-09-03 - Published: 2014-07-10 - Earliest claimed: 2012-09-07 - Assignees: Dana Corporation - Applicants: Dana Limited - Inventors: Kenneth E. Cooper - Web page: https://patentgrep.com/patent/US20140194242A1 ## CPC - F16H 37/0853: {CVT using friction between rotary members having a first member of uniform effective diameter cooperating with different parts of a second member} - F16H 15/503: {in which two members co-operate by means of balls or rollers of uniform effective diameter, not mounted on shafts} - F16H 15/52: in which a member of uniform effective diameter mounted on a shaft may co-operate with different parts of another member - F16H 15/28: with external friction surface - F16H 2037/0873: {with switching means, e.g. to change ranges} - F16H 2037/0893: {characterised in that the ratio of the continuously variable transmission is different from zero when the output shaft speed is zero} - F16H: GEARING ## Abstract Disclosed herein are power transmissions having one or more operational modes, for example, a continuously variable transmission (CVT) mode, an infinitely variable transmission (IVT) mode, and an IVT/CVT mode, that can be selected for by engaging different clutches and brakes. Disclosed herein are power transmissions comprising a power input shaft, one or more planetary gear sets, a variator (such as a CVT), and one or more clutches and brakes. In some embodiments, a first brake selects an IVT mode, a second brake selects a CVT mode, and a third brake selects an IVT/CVT mode. ## Claims ### Claim 1 A power transmission apparatus comprising: a power input shaft; a planetary gear set mechanically coupled to the power input shaft; a variator mechanically coupled to the planetary gear set; one or more clutches and brakes for switching among a plurality of operational modes of the power transmission apparatus. ### Claim 2 (depends on 1) The power transmission apparatus of claim 1, wherein a planetary gear set is coupled to the output of the variator and to a final drive and differential. ### Claim 3 (depends on 1) The power transmission apparatus of claim 1, wherein the one or more clutches and brakes are configured to be selectively engaged or released to switch among the modes of the power transmission apparatus. ### Claim 4 (depends on 1) The power transmission apparatus of claim 1, wherein the planetary gear set comprises a ravigneaux-like gear set. ### Claim 5 (depends on 1) The power transmission apparatus of claim 1, wherein the planetary gear set comprises a dual sun planetary gear set. ### Claim 6 (depends on 5) The power transmission apparatus of claim 5, wherein the dual sun planetary gearset comprises a first plane of gears including first planets, and a second plane of gears including second planets, wherein the first planets of the first plane of gears and the second planets of the second plane of gears are a single unit. ### Claim 7 (depends on 1) The power transmission apparatus of claim 1, wherein the planetary gear set comprises a three sun planetary gear set. ### Claim 8 (depends on 1) The power transmission apparatus of claim 1, wherein the variator is coupled to a sun of the planetary gear set. ### Claim 9 (depends on 1) The power transmission apparatus of claim 1, wherein the variator is coupled to a planet of the planetary gear set. ### Claim 10 (depends on 1) The power transmission apparatus of claim 1, wherein the variator comprises a continuously variable transmission (CVT). ### Claim 11 (canceled) ### Claim 12 (depends on 1) The power transmission apparatus of claim 1, wherein the one or more clutches and brakes comprises a first clutch or brake for selecting an infinitely variable transmission (IVT) mode of the power transmission apparatus. ### Claim 13 (depends on 12) The power transmission apparatus of claim 12, wherein the first clutch or brake is configured to couple to an output planet carrier of the planetary gear set. ### Claim 14 (depends on 12) The power transmission apparatus of claim 12, wherein the first clutch or brake is configured to couple to a sun of the planetary gear set. ### Claim 15 (depends on 12) The power transmission apparatus of claim 12, wherein the first clutch or brake is configured to couple to a ring of the planetary gear set. ### Claim 16 (depends on 1) The power transmission apparatus of claim 1, wherein the one or more clutches and brakes comprises a second brake for selecting a continuously variable transmission (CVT) mode of the power transmission apparatus. ### Claim 17 (depends on 16) The power transmission apparatus of claim 16, wherein the second brake is configured to couple to an output of a sun gear of the planetary gear set. ### Claim 18 (depends on 1) The power transmission apparatus of claim 1, wherein the one or more clutches and brakes comprises a third brake for selecting an infinitely and continuously variable transmission (IVT/CVT) mode of the power transmission apparatus. ### Claim 19 (depends on 18) The power transmission apparatus of claim 18, wherein the third brake is configured to couple to a ring gear of the planetary gear set. ### Claim 20 (depends on 18) The power transmission apparatus of claim 18, wherein the third brake is configured to couple to a sun of the planetary gear set. ### Claim 21 (depends on 1) The power transmission apparatus of claim 1, wherein the one or more clutches and brakes comprises an overdrive clutch for affecting a speed increase. ### Claim 22 (canceled) ### Claim 23 (canceled) ### Claim 24 (depends on 1) The power transmission apparatus of claim 1, further comprising a power output mechanically coupled to the variator, wherein the power output comprises a power output shaft, and the power transmission further comprises an output gear set mechanically coupled to a shaft of the power output for transmitting power from the variator to a differential box. ### Claim 25 (canceled) ### Claim 26 (canceled) ### Claim 27 (canceled) ### Claim 28 (canceled) ### Claim 29 (depends on 1) The power transmission apparatus of claim 1, whereby the apparatus allows for mode shifting between the continuously variable (CVT) mode and infinitely variable (IVT) mode with a minimum number of clutches and brakes.