High speed actuators and vibrators based on electro-rheological fluids
US6272852A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 17, 1998 |
| Grant date | Aug 14, 2001 |
| Priority date | — |
| Expiry date | Dec 17, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B21/06
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pressure-operated linear actuator in which the working liquid is Electro-Rheological (ER) fluid in which there is a single flow path between an inlet and an outlet of an associated pump in which there are two or more pistons and fluid chambers delineated by these pistons, which fluid chambers are connected in series by stationary ER valves distinct from the pistons such that the pressure as determined by each of the ER valves is applied to one or more of the chamber(s), wherein one or both of the ER valves are divided into two or more sections in order to minimize the length, and maximize the cross-sectional area, of the inactive connecting passages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.