Automatic transmission power transmission device
US11149847B2 · kind B2 · utility
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6Claims
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Assignee
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Key dates
| Filing date | Nov 13, 2018 |
| Grant date | Oct 19, 2021 |
| Priority date | — |
| Expiry date | Nov 13, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/2043
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A power transmission device in an automatic transmission includes a friction tightening element (a second brake) having a drum member, and a transmission path constituent member (a third ring gear) coupled to the drum member via a coupling part extending circumferentially along the drum member, the drum member having low-rigidity parts (long holes) provided at a plurality of circumferential positions on the drum member in at least one of portions radially outside and inside the coupling part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.