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US 7,093,574 B2Granted
Rocker arm shaft for an automobile engine
AssigneeGM Daewoo Auto & Technology Company
InventorJae-Ook Oh
Life of this patent
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AssigneeGM Daewoo Auto & Technology Company
InventorJae-Ook Oh
Estimating the term…
Disclosed is a rocker arm shaft for an automobile engine, which is effectively capable of offsetting the length change of the rocker arm shaft, which caused by heat. According to an embodiment of the present invention, a rocker arm shaft can be divided into at least two shafts. An elastic member, such as a coil spring, is positioned between the shafts. When the length change of the shafts is changed by heat, the elastic member offsets the changed length of the shafts. The rocker arm shaft is divided into a hollow first shaft and a hollow second shaft. A one end of the second shaft of the rocker arm shaft forms a receiving groove for inserting the elastic member. With this structure, the rocker arm shaft for an automobile engine does not bend nor get twisted by offsetting the changed length of the shafts by means of the elastic member.
Hollow rocker arm shafts for an automobile engine, in which the rocker arm shafts are fitted into a plurality of shaft holes formed in a cylinder head of the automobile engine, and in which fixing caps are threaded into a part of the shaft holes, which are positioned at both ends of the cylinder head, characterized in that:
Dependencies are inferred from the claim text.