Output split-type mechanical and hydraulic transmission
US4184385A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 11, 1977 |
| Grant date | Jan 22, 1980 |
| Priority date | — |
| Expiry date | Jul 11, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2037/107
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An output split-type mechanical and hydraulic transmission includes input and output shafts, first and second differential gear mechanisms for establishing different input-output speed ratios, at least two clutch mechanisms for selectively cooperating with components of the differential gear mechanisms and the input and output shafts to establish different input-output speed ratio ranges, and first and second hydraulic pump motors. The first pump motor has a variable hydraulic capacity and is mechanically and drivably connected to the input shaft for establishing variations in the hydraulic capacity. The second pump motor is mechanically connected to at least one component of both the first and second differential gear mechanisms for establishing rotational speeds of the components of the differential gear mechanisms during the different input-output speed ratio ranges in relationship to the variations of the first pump motor's hydraulic capacity. The first differential gear mechanism includes at least three elements, the first element being connected to the input shaft, the second element being connected to the output shaft, and the third element being connected to the second pump…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.