Hydraulic actuator
US12421987B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 11, 2022 |
| Grant date | Sep 23, 2025 |
| Priority date | — |
| Expiry date | Oct 11, 2042 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B15/103
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic actuator includes a tube capable of being expanded and contracted by fluid pressure, a sleeve covering the tube, a pair of sealing members that seal both ends of the tube in an axial direction thereof, and plural inner pieces aligned inside the tube so as to be adjacent to each other. The plural inner pieces include a restraint side where adjacent inner pieces are in contact with each other in the tube whose inside is not pressurized by the fluid pressure and a swing side where a gap is made at an opposed position to the restraint side to allow the adjacent inner pieces to swing with respect to each other. The plural inner pieces further include a restraint mechanism that keeps the adjacent inner pieces in contact with each other on the restraint side in the tube whose inside is pressurized by the fluid pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.