Dual flow hydraulic system and control valve therefor
US4057005A · kind A · utility
2Cited by
14References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 12, 1975 |
| Grant date | Nov 8, 1977 |
| Priority date | — |
| Expiry date | Sep 12, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87169
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A hydraulic system with a valve for controlling fluid flow to the two reversible hydraulic wheel motors in a hydrostatic drive vehicle includes a pair of valve spools axially slidable in bores in a valve body. Each spool has a pair of opposed notches. In one position of the spool, the notches provide separate paths for dual input flows to each of two passages to the wheel motors which differentially lock the wheel motors. In a second position, the notches act to exhaust the return flows in two passages to a single exhaust.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.