Clutch for motor driven antenna

Details Clutch for motor driven antenna Clutch for motor driven antenna

1998-05-22

2000-03-28

Wong, Don

Communications: radio wave antennas

Antennas

Rod type

343711, 343713, 343715, H01Q 110, H01Q 132

Patent

active

060437960

ABSTRACT:
A clutch for a motor driven antenna according to the present invention includes a driving member rotated by a driving motor, a driven member for transmitting a rotating force of the driving member to an antenna element, and a clutch element for frictionally transmitting the rotating force of the driving member to the driven member. The clutch element includes recesses formed on a rotating track of one of opposing sides of the driving member and driven member, projections formed on a rotating track of the other side so as to be fitted into the recesses when the driving member and the driven member are rotated relative to each other, and anti-slip members protruded near the recesses such that a sliding frictional force caused at the tip end contact portions of the projections exceeds a maximum load of the antenna element including the driven member when the antenna element is extended or retracted.

REFERENCES:
patent: 5068673 (1991-11-01), Kimura
patent: 5173716 (1992-12-01), Tetsuka
patent: 5959593 (1999-09-01), Hoshi

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