All hydraulic motor grader circuitry
US4033236A · kind A · utility
9Cited by
13References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1974 |
| Grant date | Jul 5, 1977 |
| Priority date | — |
| Expiry date | Feb 4, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87225
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A closed center control valve for double acting motors having an inlet passage and a pair of control passages is provided with pre-sized restrictions in the control passages to control the flow rate to the motor so that a pre-selected velocity of movement of the motor is achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.