Damper, washing machine, and washer/dryer
US8757335B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 23, 2012 |
| Grant date | Jun 24, 2014 |
| Priority date | — |
| Expiry date | Aug 23, 2032 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06F37/22
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A damper obtaining damping force by the frictional resistance imparted by the viscosity of the magnetic viscous fluid is disclosed. The damper is provided with a seal not only on one (lower side) of the axial outer sides of the yoke but also on the other (upper side) of the axial outer sides of the yoke to trap the magnetic viscous fluid within the magnetic viscous fluid filling portion at both axial outer sides of magnetic viscous fluid filling portion. Because the leakage of the magnetic viscous fluid can be prevented, no air is introduced into the magnetic viscous fluid filling portion, to allow the density of the magnetic viscous fluid within magnetic viscous fluid filling portion to be maintained at a favorable level and prevent degradation of damping force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.