Telescopic rod antenna apparatus

Details Telescopic rod antenna apparatus Telescopic rod antenna apparatus

1998-03-10

1999-12-14

Wong, Don

Communications: radio wave antennas

Antennas

Rod type

343715, 343901, H01Q 110, H01Q 930

Patent

active

060023783

ABSTRACT:
A telescopic rod antenna apparatus of the present invention includes a mechanism for extending/retracting a telescopic antenna element by operating a smallest-diameter one of rods of the antenna element, and a means for setting the rods in the second state where a tip portion of a largest-diameter rod contacts an O-shaped ring seal means and then extending the antenna element using the mechanism, setting the rods in the second state where the antenna element is retracted using the mechanism, and displacing the second state to the first state where the largest-diameter rod is returned to the initial position of a holding tube to bring a top portion into contact with the O-shaped ring seal means.

REFERENCES:
patent: 2299785 (1942-10-01), Barrett
patent: 2491629 (1949-12-01), Vernier et al.
patent: 3116691 (1964-01-01), Tatel et al.
patent: 4647936 (1987-03-01), Harada
patent: 4660049 (1987-04-01), Shinkawa
patent: 5079562 (1992-01-01), Yarsunas et al.

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