Actuator rate control with energy absorbing pressure relief system
US10570935B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 2017 |
| Grant date | Feb 25, 2020 |
| Priority date | — |
| Expiry date | Apr 19, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/502
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An actuator includes a piston assembly movably disposed within an assembly housing having a fixedly supported end and an opposing end that receives a movable piston assembly. The piston assembly includes a piston rod and an attached piston head having a fixed orifice as well as an orifice with a check valve to create rate control of the assembly. Hydraulic fluid is caused to move through the axially movable piston head based on compressive and tensile loads imparted to the assembly. A plurality of pre-loaded springs are configured to selectively provide pressure relief in the event the orifices of the piston become clogged, wherein the plurality of pre-loaded springs, such as disc springs, further provide an energy absorbing function of the assembly based on loading conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.