The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 19, 1999
Filed:
Mar. 10, 1998
Harada Industry Co., Ltd., Tokyo, JP;
Abstract
A telescopic rod antenna according to the present invention includes an antenna element and a waterproof ring-shaped seal member which is inserted in a ring-shaped gap in a joint between two rods of the antenna element. The ring-shaped seal member is obtained by shaping a thermoplastic resin film strip, on which at least one projecting portion is formed in its longitudinal direction, like a ring and compressing and inserting a ring-shaped film into the ring-shaped gap. A plurality of ring-shaped contact portions are formed on both sides of the film strip in its longitudinal direction while the projecting portion of the film strip serves as a basic contact portion. The ring-shaped contact portions are adhered to the inner surface of the larger-diameter rod and the outer surface of the smaller-diameter rod at a predetermined pressure. The tip portion of the smallest-diameter rod is provided with a short cylinder member fitted to the outer periphery of the tip portion of the smallest-diameter rod, and a stopper member for sealing an open end of a hollow of the short cylinder member.