Hydraulic control system for tractor
US4085806A · kind A · utility
6Cited by
4References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 5, 1977 |
| Grant date | Apr 25, 1978 |
| Priority date | — |
| Expiry date | Jan 5, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01B63/112
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Hydraulic control system including a bypass provided in an intermediate portion of an oil passage extending from a position control valve to a hydraulic actuator for raising and lowering a working implement. A draft control valve disposed in the bypass controls the pressure of oil flowing into the bypass, in response to the displacement of a member for sensing the draft force of the working implement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.