Internal-combustion engines – Poppet valve operating mechanism – Tappet
Reexamination Certificate
2007-11-27
2007-11-27
Chang, Ching (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
Tappet
C123S090520, C123S090450
Reexamination Certificate
active
11360259
ABSTRACT:
A connection of a bearing bolt (6) in a cylindrical housing (1) of a roller tappet (2) that is actuated in a direction of a longitudinal axis (Z) is provided, especially for a tappet push-rod valve drive of an internal combustion engine. The bearing bolt (6) is supported in bore holes (7) of the housing (1), which extend in a transverse plane (XY) to the roller tappet (2), perpendicular to the longitudinal axis (Z), and is connected with a positive and/or non-positive fit to the housing (1) through material deformation. The material deformation is provided as one or more segments (9, 10), of which at least one segment (9) completely encloses a radial load zone (16) of the bearing bolt (6), and a section (15) of the bearing bolt (6) extending about the transverse plane (XY) is free from material deformation.
REFERENCES:
patent: 6196175 (2001-03-01), Church
patent: 6382173 (2002-05-01), Roe
Kuhl Mario
Meisborn Marco
Chang Ching
Schaeffler KG
Volpe and Koenig PC
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