Single rail shift operator assembly
US5878624A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1997 |
| Grant date | Mar 9, 1999 |
| Priority date | — |
| Expiry date | Jun 6, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/20183
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A transfer case having a two-speed drive assembly includes a directly coupled shift operator with feedback. The shift operator includes an electric, pneumatic or hydraulic motor which directly, rotatably drives a shift rail. The shift rail includes threads and receives a shift fork having complementary threads. The shift fork engages a dog clutch. Bi-directional rotation of the shift rail correspondingly bi-directionally translates the shift fork to select direct drive (high gear), reduced speed drive (low gear) or neutral operation of the two-speed drive assembly. A shift rail position sensor provides data to associated logic and command circuitry regarding the actual position of the shift fork.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.