Lifting pole apparatus for traffic control

Details Lifting pole apparatus for traffic control Lifting pole apparatus for traffic control

2008-05-06

2008-05-06

Addie, Raymond W (Department: 3671)

Road structure, process, or apparatus

Traffic director

Yielding

C049S049000

Reexamination Certificate

active

07367746

ABSTRACT:
There is provided a lifting pole apparatus which can lift and lower a pole having such strength as to be capable of preventing cars from entering. The lifting pole apparatus comprises a cylindrical pole which is capable of lifting and lowering inside a housing case; a screw shaft hanging from a top portion of the pole inwardly; a stay disposed upright on a bottom portion of the housing case, and housed in the pole; a driving gear rotatably supported on the stay, and having a screw portion on a through hole disposed at a center axis thereof, the screw portion being threadably mounted on the screw shaft; at least two motors disposed on the stay for rotating the driving gear; and an electro-magnetic brake disposed on the stay for activating the brake on the rotation of the driving gear.

REFERENCES:
patent: 3086430 (1963-04-01), Emmel
patent: 3771488 (1973-11-01), Ecke
patent: 4635492 (1987-01-01), Uebelhart
patent: 4919563 (1990-04-01), Stice
patent: 7244075 (2007-07-01), Stadler
patent: 29606794 (1996-08-01), None
patent: 2650009 (1991-01-01), None
patent: 10053394 (1998-02-01), None
patent: 2003213636 (2003-07-01), None

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