Valve timing controlling apparatus

Details Valve timing controlling apparatus Valve timing controlling apparatus

2005-09-14

2008-11-04

Eshete, Zelalem (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C123S090310

Reexamination Certificate

active

07444970

ABSTRACT:
In a valve timing controlling apparatus having: a first rotary body rotatable with a cam shaft of an internal combustion engine; a second rotary body rotatable with a crank shaft and rotatable relative to the first rotary body; a controlling means for varying relative rotational phase between the first rotary body and the second rotary body; and a torsion coil spring for urging the first rotary body relative to the second rotary body in a phase advancing direction. The coil portion22of the torsional coil spring20includes a pair of holding areas23a,23bextending continuously from the respective retaining portions and capable of fixing the coil portion in position relative to the first rotary body1and the second rotary body2and includes also a torque generating area25disposed between the pair of holding area. The holding areas and the torque generating area have different coiling diameters.

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patent: 6662769 (2003-12-01), Eguchi et al.
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patent: 2002/0152977 (2002-10-01), Eguchi et al.
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patent: 2002-227621 (2002-08-01), None
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patent: 2003-120229 (2003-04-01), None
patent: 2004-204726 (2004-07-01), None

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