发明名称 Collapsible rooftop microwave antenna with wind loading feature
摘要 A parabolic, collapsible rooftop microwave antenna for direct satellite-to-consumer TV transmission pivots in the direction of the aperture axis about a horizontal pivot axis in response to excessive wind forces. The antenna has a cross-head theodolite-type mount adjustable for azimuth and elevation, with a horizontal pivot that provides axial displacement if the axial wind force exceeds a predetermined threshold force. This limits the torque transmitted to the roof on which the antenna is mounted to a reasonably low level. Various torque sensitive horizontal pivots are described including a torqued pivot bolt, torqued slide bolts disposed in arcuate slots for limit-stop action, shear pins for quick release action, and biased springs for collapse and self-restoration to the initial vertical position in response to transient wind force exceeding a threshold force set by the spring bias.
申请公布号 US4490726(A) 申请公布日期 1984.12.25
申请号 US19820384527 申请日期 1982.06.03
申请人 ANDREW CORPORATION 发明人 WEIR, WALTER F.
分类号 H01Q3/04;H01Q1/08;H01Q1/12;H01Q19/02;H01Q19/12;(IPC1-7):H01Q1/12 主分类号 H01Q3/04
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