Variable phase drive mechanism
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United States of America Patent
Stats
-
Sep 18, 2007
Grant Date -
Oct 13, 2005
app pub date -
Apr 11, 2005
filing date -
Apr 13, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A twin vane-type phaser is described which is provided with a locking mechanism for locking the drive member to the driven members when the pressure in the working chambers is a below is predetermined value. The locking mechanism comprises two coaxial locking pins 114, 118 mounted in a common bore 110 in the centrally located member 32. The locking pins are resiliently urged apart by a spring 120 into bores in the two outer members 38, 40 and are retracted by pistons 112, 116 when the hydraulic pressure in the working chambers attains the predetermined value.
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