Patent ID: 7536986

Claim:
A camshaft ( 1 ) of automotive engines in particular,having an inner shaft ( 3 ) arranged coaxially in an outer shaft ( 2 ), mounted to rotate with respect to the outer shaft ( 2 ), having first and second cams rotatable with respect to one another, the first cams being fixedly connected to the inner shaft ( 3 ) and the second cams being fixedly connected to the outer shaft ( 2 ), with a first and a second phase adjuster ( 7 , 8 ), the first phase adjuster ( 7 ) adjusting a phase relation of the inner shaft ( 3 ) and thus the first cams in relation to a drive, while the second phase adjuster ( 8 ) adjusts a phase relation of the outer shaft ( 2 ) and thus the second cams in relation to the drive, whereby the first and second phase adjusters ( 7 , 8 ) each have a shiftable hydraulic valve ( 9 , 10 ), both being arranged essentially inside the inner shaft ( 3 ).