Hydromechanical transmission
US4170153A · kind A · utility
17Cited by
15References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1977 |
| Grant date | Oct 9, 1979 |
| Priority date | — |
| Expiry date | Apr 15, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2037/0886
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In a hydromechanical transmission, low and high speed drive power trains are selectively completed in response to variation of the speed ratio between an input shaft and an output shaft. The transmission comprises a speed ratio detecting valve for detecting lower and higher limits of a predetermined speed ratio and a clutch control valve for conducting the switchover between the low and high speed drive power trains with a predetermined time lag after the actual speed ratio reaches a range defined by the lower and higher limits of the predetermined speed ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.