Fluid damping devices
US5540549A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 5, 1994 |
| Grant date | Jul 30, 1996 |
| Priority date | — |
| Expiry date | Aug 5, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F9/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention relates to a fluid device for providing high load carrying capacity in an one direction and which provides a high level of damping along a substantially perpendicular direction. This is achieved by a device which includes an inner member and an outer member and a flexible section causing a connection therebetween, said flexible section exhibiting a substantially higher stiffness along one axis, a fluid cavity formed within said device, a piston attached to one of said inner member and said outer member, said piston being substantially surrounded by, and submersed in said fluid. In one embodiment, the piston includes a piston area A.sub.p which is substantially greater than 1/2 the fluid cavity area A.sub.c. Movement of the piston within the fluid cavity causes a damping force comprising a throttling component as well as a viscous shear component. Means are disclosed for substantially increasing the viscous shear component and throttling component including novel piston concepts. This invention has particular utility for use in hingeless rotor systems for helicopters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.