Device for sequentially supplying several hydraulic motors
US4179981A · kind A · utility
7Cited by
5References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 11, 1978 |
| Grant date | Dec 25, 1979 |
| Priority date | — |
| Expiry date | May 11, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B11/20
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fluid supply circuit for supplying three motors includes means for sequentially connecting two of the motors to the supply conduit of the third motor as the pressure in the supply conduit rises through first and second threshold levels. The circuit includes a manual override for suppressing the automatic sequential action. The circuit is applied to the control of the booms and bucket of a hydraulic excavator, and provides for semi-automatic digging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.