Charge pressure priority valve
US5165233A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 1991 |
| Grant date | Nov 24, 1992 |
| Priority date | — |
| Expiry date | Mar 28, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2657
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A charge pressure priority valve for supplying a flow of sufficient pressure to energize an auxiliary implement while supplying a nearly constant pressure flow to a hydrostatic fluid circuit includes a valve body having an interior bore with a pump inlet passage for communicating a flow from a hydraulic pump thereto. A main flow outlet passage extends from the interior bore for supplying fluid to the hydraulic fluid circuit and has a main flow feedback passage interconnecting the main flow outlet passage and the interior bore. An auxiliary flow outlet passage extends from the interior bore for supplying a flow of sufficient pressure to energize an auxiliary implement. A valve spool is disposed within the interior bore and defines a central chamber intermediate a pair of spaced apart end chambers in the bore, with one of the pair of end chambers being isolated from the other of the pair of end chambers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.