Telescopic shaft
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United States of America Patent
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-
Jun 12, 2012
Grant Date -
May 27, 2010
app pub date -
May 28, 2008
filing date -
May 30, 2007
priority date (Note) -
In Force
status (Latency Note)
Importance
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.
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