Motor displacement control system
US4191017A · kind A · utility
3Cited by
1References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 8, 1979 |
| Grant date | Mar 4, 1980 |
| Priority date | — |
| Expiry date | Feb 8, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/42
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A motor displacement control system (10) has a variable displacement drive motor (38), an auxiliary motor (30), a source (12) of fluid under pressure for operating the motors (30, 38), a first valve (50) for controlling the displacement of the drive motor (38) and maintaining at least a first pressure level thereto, and a second valve (98) for controlling the displacement of the drive motor (38) in response to operation of the auxiliary motor (30) at a second pressure level and overriding the first valve (50). The system is particularly useful on a motor grader.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.