Multiple speed transmission
US8574113B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 3, 2012 |
| Grant date | Nov 5, 2013 |
| Priority date | — |
| Expiry date | Aug 3, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/2097
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A family of transmissions produces at least eight forward and one reverse speed ratio by selective engagement of various combinations of three clutches or brakes. Each transmission includes two fixed gearing arrangements that establish fixed speed relationships between an input shaft, and output shaft, and four other elements. Specifically, the input shaft is constrained to rotate at a speed between that of the first and second elements while the output shaft is constrained to rotate at a speed between that of the third and fourth elements. Additional gearing, clutches, and brakes establish specified selective speed relationships among these elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.