Device for driving telescopic power antenna

Details Device for driving telescopic power antenna Device for driving telescopic power antenna

1991-02-01

1992-12-22

Hille, Rolf

Communications: radio wave antennas

Antennas

Rod type

464 61, 464160, H01Q 1100, F16D 3120, F16D 3660, F16D 3680

Patent

active

051737167

ABSTRACT:
A device for driving telescopic power antenna for vehicles including a drive cylinder connected to an antenna motor, a driven cylinder which is concentrical with the drive cylinder and controls the extension and retraction of the antenna when rotated by the drive cylinder, and a transmisson mechanism interposed between the drive an driven cylinders. The transmission mechanism includes a projection formed on the drive cylinder, a circular groove formed on the driven cylinder, a coil spring installed in a manner to expand and contract in the direction of the length of the groove, and a pair of arc shaped cores installed in the coil spring. The coil spring and the cores ae compressed by a specific displacement-pressure relationship when the projection moves along the groove and presses one end of the coil spring when a relative rotation occurs between the drive and driven cylinders.

REFERENCES:
patent: 446123 (1891-02-01), Pyle
patent: 1522774 (1925-01-01), Foote
patent: 3922884 (1975-12-01), Chapman
patent: 4770055 (1988-09-01), Chevance et al.
patent: 4864322 (1989-09-01), Yamamoto et al.

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