Two-step roller finger cam follower having angled lock pin

Details Two-step roller finger cam follower having angled lock pin Two-step roller finger cam follower having angled lock pin

2005-08-09

2005-08-09

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Rocker

C123S090160

Reexamination Certificate

active

06925978

ABSTRACT:
A two-step roller finger follower for shifting between high-lift and low-lift valve modes includes a body having side members defining coaxially disposed shaft orifices, a pallet end, a socket end, a slider arm aperture, and a latch pin channel. The socket end is mountable to a lash adjuster, and the pallet end is matable with a valve stem. A slider arm for engaging a high-lift cam lobe is disposed in the aperture, is pivotably mounted to the body, and includes a slider tip for engaging a latch pin having a nose section. A spool-shaped roller is adapted to follow the surface motion of low-lift cam lobes. The axis of the latch pin intersects a radius extension of the slider arm at an angle of less than 180° such that the latch pin is prevented from accidentally locking the slider arm in its lost-motion position.

REFERENCES:
patent: 4611558 (1986-09-01), Yoshizaki et al.
patent: 5544626 (1996-08-01), Diggs et al.
patent: 6318318 (2001-11-01), Jahr
patent: 6755167 (2004-06-01), Krieg et al.

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