Actuator control valve arrangement
US11268542B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 11, 2019 |
| Grant date | Mar 8, 2022 |
| Priority date | — |
| Expiry date | Apr 21, 2040 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/8636
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An actuator control arrangement includes a hydraulic actuator having a housing and a piston rod axially moveable within the housing, a stop disposed within the housing to limit the extent of movement of the piston rod into the housing, and a solenoid valve arranged between a pressure source and the actuator. The solenoid valve is switchable between a first mode and a second mode in response to an electric control signal, wherein, in the first mode, the solenoid valve creates a fluid flow path from the pressure source to the actuator so as to locate the stop in its neutral position and in the second mode, the solenoid valve creates a fluid flow path to release pressure from the actuator to permit the stop to move to its retracted position. In the event of electrical failure, the stop will set the actuator to its neutral position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.