Method for manufacturing a telescopic antenna for vehicles
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United States of America Patent
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-
Jun 17, 1997
Issued Date -
N/A
app pub date -
Feb 23, 1995
filing date -
Dec 4, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A multi-stage telescopic antenna for use in vehicles and a method for manufacturing such an antenna in which the antenna element, which comprises uppermost rod and conductive pipes, is free of any bending or breaking damage even if a large load is applied to the antenna element from a lateral direction, and there is no permanent deformation occurs even after the load is removed, so that the antenna element can always be maintained straight and smooth and stable extension and retraction can be executed. At least the conductive pipes 12 through 14 are formed from a high-elasticity material obtained by heat-treating SUS 631. In the heat treatment, the material is heated at a standard temperature of 480.degree. C..+-.5.degree. C. and then gradually cooled.
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