Output split-type mechanical and hydraulic transmission
US4232568A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 28, 1977 |
| Grant date | Nov 11, 1980 |
| Priority date | — |
| Expiry date | Jun 28, 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, intermediate, and output shafts, differential gear mechanisms for establishing different input-output speed ratios, clutch mechanisms for selectively cooperating with components of the differential gear mechanisms and the input, intermediate, 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 driveably 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 the 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 o the first pump motor's hydraulic capacity. A first differential gear mechanism includes at least four elements, the first element being connected to the input shaft, the second element being connected to the second pump motor, and the third and fourth elements being selectively engageable with the inte…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.