Mechanical actuator with a hydraulic damper device
US9969233B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 8, 2013 |
| Grant date | May 15, 2018 |
| Priority date | — |
| Expiry date | Feb 28, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/18648
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The invention relates to an actuator comprising a cylinder (1) in which a rod (2) is mounted to slide, the actuator having a screw (8) extending inside the rod to co-operate with a nut (7) secured to the rod, the screw being driven in rotation by a motor (10), the actuator being characterized in that a hydraulic chamber (CH) filled with hydraulic fluid is arranged inside the actuator by means of a floating piston (20) sliding in sealed manner against the rod inside of the actuator, the hydraulic chamber being in fluid flow communication with an accumulator (21) via a solenoid valve (22) that is controllable between a closed state in which the chamber is isolated from the accumulator, and a fluid-passing state in which the hydraulic chamber and the accumulator are in communication, calibrated resistance being exerted against the passage of fluid from the chamber towards the accumulator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.