Cam follower with roller

Details Cam follower with roller Cam follower with roller

2005-01-25

2005-01-25

Bucci, David A. (Department: 3682)

Machine element or mechanism

Elements

Cams

C384S625000

Reexamination Certificate

active

06845686

ABSTRACT:
A cam follower with roller of the present invention includes a cam follower body having a roller supporting portion integrated therein, a roller supporting shaft having both ends fixed to the roller supporting portion and a roller rotatably supported on the roller supporting shaft with a plurality of needle rollers interposed. At least one of the supporting shaft and the needle roller has a nitride layer on the surface thereof, and has a surface hardness of at least HV 650 and an amount of retained austenite of at least 25% by volume and at most 50% by volume. Thus, a cam follower with roller having excellent durability and fatigue life can be obtained.

REFERENCES:
patent: 4969261 (1990-11-01), Igarashi
patent: 5361648 (1994-11-01), Murakami et al.
patent: 5375323 (1994-12-01), Sata
patent: 5553512 (1996-09-01), Harimoto
patent: 5606939 (1997-03-01), Spath
patent: 5611250 (1997-03-01), Narai et al.
patent: 5816207 (1998-10-01), Kadokawa et al.
patent: 05321999 (1993-12-01), None
patent: 7-190072 (1995-07-01), None
patent: 2581973 (1998-07-01), None
patent: 2000-161348 (2000-06-01), None

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