Hydraulic control valve with independently operable bypass valve
US4570672A · kind A · utility
7Cited by
3References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 5, 1985 |
| Grant date | Feb 18, 1986 |
| Priority date | — |
| Expiry date | Apr 5, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87225
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic sectional control valve includes separate pump pressure and function control spools. The spools may be actuated independently and sequentially to provide raising, holding and power down functions for earthmoving and construction vehicles. Additional function control spools may be added in the valve structure to provide multiple function control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.