Telescopic shaft
US8197348B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 2008 |
| Grant date | Jun 12, 2012 |
| Priority date | — |
| Expiry date | Jan 29, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2326/24
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A telescopic shaft for vehicles comprising an inner shaft axially movable in an outer shaft. The telescopic shaft comprises at least two rows of balls with at least one ball per row between the inner shaft and the outer shaft. A row of balls is arranged on at least one ball race arranged against the inner shaft. The ball race is wedge shaped on its against the inner shaft facing surface. The telescopic shaft comprises a prestress mechanism which pushes the ball race along a wedge unit axially in relation to and radially in the direction against the outer shaft. whereby the telescopic shaft is prestressed. The prestress mechanism is arranged to release the prestress when the alteration in length of the telescopic shaft exceeds a predetermined length.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.