Caster shimmy damper including a viscous damping medium
US4432116A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 19, 1983 |
| Grant date | Feb 21, 1984 |
| Priority date | — |
| Expiry date | Jul 19, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4984
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A viscous rotary damper adapted to attenuate shimmy of a rotary member such as a caster relative to an associated member such as a wheelchair leg, comprises a pair of relatively rotatable annular portions having structure for respective attachment to the members. The damper portions have annular cooperative working surfaces of substantial length defining therebetween a shear film space gap working chamber which is closed at opposite ends by dynamic seals and has a viscous damping medium substantially filling the working chamber gap and providing viscous shear coupling yieldably resisting relative rotary movements of the working surfaces. The damper is adapted to be in a miniaturized form comprising a stator ring and a rotor housing, the stator ring being arranged to be keyed to one of relatively rotary members and the rotor being arranged to be keyed to the other of relatively rotary members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.