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US 5,151,711 AGranted
Automobile antenna and method of manufacturing the same
AssigneeHarada Industry Co., Ltd.
InventorMinoru Taguchi
Life of this patent
Estimating the term…
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AssigneeHarada Industry Co., Ltd.
InventorMinoru Taguchi
Estimating the term…
An automobile antenna of a rod shape comprises an antenna element and a hollow cylindrical member of a resin fitted on the circumference of the antenna element. The hollow cylindrical member includes a plurality of hollow cylindrical units that may be coupled together or may be spaced apart. The cylindrical member has a ridge or ridges in the form of a spiral or ring. The ridge functions to generate a turbulent flow of air when the automobile runs at a high speed, so that a whistling sound generated by the wind blow may be eliminated. The method of making an antenna uses two offset molds having a plurality of cavities by the provision of spaced apart partitions, which also support the antenna element. A molding material is supplied into the cavities so that the ridges-bearing cylindrical member and the antenna element may be fabricated as one unit. Portions of the antenna element supported by the partitions, after molding operation, are exposed externally to attain an improved whistling sound elimination function.
An automobile antenna comprising:
An automobile antenna which substantially reduces wind noise generated as wind moves past the antenna, the wind creating a reduced pressure area behind the antenna when viewed from a direction in which the wind is moving, said automobile antenna comprising:
Dependencies are inferred from the claim text.