Fluid and elastomer damper
US6092795A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 4, 1997 |
| Grant date | Jul 25, 2000 |
| Priority date | — |
| Expiry date | Aug 4, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F9/43
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fluid damper to damp unwanted vibration between a first member (21) and a second member (23, 23'), such as between a rotor blade and hub within a helicopter rotor system. According to a first aspect, the fluid damper (20) includes an outer member (22), first and second inner members (24, 24'), first and second elastomeric elements (26, 26'), a hollow (28), a divider (30) subdividing hollow (28) into first (32) and second (32') operating chambers, a connector (34) interconnecting first (24) and second (24') inner members, a fluid passageway (36) interconnecting operating chambers (32, 32'), a fluid (38) contained within said passageway (36) and operating chambers (32, 32'), and a volume compensator (40) including a compensator chamber (42) housed within one of first (24) and second (24') inner members. In another aspect, an annular bubble trap (58) is formed in a wall portion (62) of the operating chamber (32) to focus any air bubbles into a fill port (54) during fill. In another aspect, a first chamber fill port (54) and a second chamber fill port (54') each interconnect with the annular bubble trap (58) to aid in filling the chamber (32') and removing air bubbles therefrom. In y…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.