Internal-combustion engines – Poppet valve operating mechanism – Rocker
Reexamination Certificate
2007-05-29
2007-05-29
Denion, Thomas (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
Rocker
C123S090450, C123S090160, C029S888200
Reexamination Certificate
active
11018933
ABSTRACT:
A rocker arm includes: a body that is made of sheet metal and includes a pair of side walls; and a pair of axial holes that are respectively formed through the pair of side walls and have a first diameter and through which an axis is inserted. The pair of axial holes include thickened portions formed partially or overall of circumference of the pair of axial holes, and the thickened portion is formed by expanding a hole that has a second diameter smaller than the first diameter and is formed in a pre-arranged range for forming the axial hole in a blank material so as to causing plastic flow in a metallic material of the circumference of the hole.
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European Search Report dated May 6, 2005.
Denion Thomas
Eshete Zelalem
Koyo Seiko Co. Ltd.
McGinn IP Law Group PLLC
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