Hydraulic directional valve for servocontrols of aircraft in particular helicopters
US5899226A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1997 |
| Grant date | May 4, 1999 |
| Priority date | — |
| Expiry date | Mar 25, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86646
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
This directional valve comprises a closing element (1) rotatively mounted in a fixed sleeve (5) disposed in a body (2) with interposition of an annular element (4) between the closing element and the sleeve. Means are provided for locking the annular element against rotation in normal use and for permitting the driving of the annular element by the closing element in the event of a seizing of the closing element in the annular element. These locking means comprise a device (12) having a push member (13) mounted laterally on the body at one end of the closing element (1) and extending in a direction perpendicular to the closing element (1), resilient means (15) being provided for biasing the push member against a rocker (30) inside the body, the thrust of which is applied to locking balls (21) which project from recesses (24) provided in an end of the annular element (4).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.