Magnetorheological fluid devices
US5284330A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1992 |
| Grant date | Feb 8, 1994 |
| Priority date | — |
| Expiry date | Jun 18, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/447
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
This invention relates to sealless designs of magnetorheological fluid dampers. With these sealless designs a piston rod extends above and below a piston head within a cylindrical housing and has frustoconical elastomer elements attached to and between the rod and housing to allow translation of the piston head and rod. The piston head has a coil contained radially therein that produces magnetic flux in and around the piston. The advantages of utilizing an MR fluid according to the invention include magnetic fields which are easily produced by low voltage electromagnetic coils, damping effects which are velocity independent, and higher yield strength obtained by the MR fluid capable of generating greater damping forces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.