Hollow steering rack bar and its manufacturing method

Details Hollow steering rack bar and its manufacturing method Hollow steering rack bar and its manufacturing method

2005-08-09

2005-08-09

Fenstermacher, David M. (Department: 3682)

Machine element or mechanism

Gearing

Directly cooperating gears

C074S109000, C074S120000

Reexamination Certificate

active

06925899

ABSTRACT:
Described is a steering rack bar which is low in costs, which is hollowed in overall length, and for use in steering equipment for automobiles. A rack is formed on a first steel tube by plastic working, wherein the first steel tube has good plastic workability by low carbon content, and has high strength after hardening. The above first steel tube and a second steel tube are joined to complete a hollow steering rack bar, wherein the second steel tube has a higher carbon content and is lower in cost than the first steel tube. Moreover, the second steel tube which has a margin of the strength can be thinner than the first steel tube for reduction of weight.

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European Search Report dated Apr. 7, 2003, for EP No. 02 02 6480.

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