Torsional vibration dampening assembly
US6565445B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 11, 2001 |
| Grant date | May 20, 2003 |
| Priority date | — |
| Expiry date | Jun 11, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F1/128
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A torsional vibration dampening assembly includes a hub having a radially outwardly extending flange with a plurality of openings formed therethrough. A pair of cover plates are supported on the hub for rotation relative thereto, each having a corresponding plurality of openings formed therethrough. A first stage vibration damper, including an annular central damper element having inner and outer rings secured thereto, extends between the second cover plate and the hub. A second stage vibration damper includes a spring damper assembly provided in each of the openings. Each of the spring damper assemblies includes a coiled spring having ends that react against first and second end caps. A movement restraining structure is provided for restraining the end caps from moving freely relative to one another under the urging of the spring. A hollow cylindrical isolation sleeve is disposed about each of the springs. The isolation sleeves prevent the springs from directly engaging the first and second cover plates and the hub during use, thus lowering the amount of noise that is generated during use of the torsional vibration dampening assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.