Antivibration supports for helicopter blades, and a helicopter rotor including such supports
US5489193A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 29, 1994 |
| Grant date | Feb 6, 1996 |
| Priority date | — |
| Expiry date | Jul 29, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F13/08
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention relates to an antivibration device comprising two rigid strength members that are parallel and perpendicular to a first axis Z, and at least one laminated element interposed between the two strength members, said laminated element being made up of alternating layers of a rigid material and of elastomer which are disposed perpendicularly to the first axis, said laminated element enabling the two strength members to move relative to each other along a second axis Y that is perpendicular to the first axis. According to the invention, the device further includes a hydraulic damper which presents at least two leakproof cavities that are deformable and that are interconnected by means of a narrow channel, the two leakproof cavities and the narrow channel being filled with a liquid, each leakproof cavity being defined, at least in part, by a deformable wall which is fixed to both of the strength members and which permits them to move relative to each other parallel to the second axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.