Apparatus for controlling traffic flow along a pathway

Details Apparatus for controlling traffic flow along a pathway Apparatus for controlling traffic flow along a pathway

2006-02-14

2006-02-14

Le, Mark T. (Department: 3617)

Railway switches and signals

Electric automatic highway signals, mine doors, and gates

C246S127000, C246S473100, C049S049000, C049S124000

Reexamination Certificate

active

06997417

ABSTRACT:
A railroad crossing gate with a gate assembly. An extendible member slides within an outer member with minimal friction. When the gate is in its open position, gravity retracts the extendible member to hollow member. When the gate is in its blocking position, gravity causes the extendible member to move out of the hollow member to a final blocking position.

REFERENCES:
patent: 441226 (1890-11-01), Blethen et al.
patent: 494390 (1893-03-01), Smith
patent: 827772 (1906-08-01), Worland
patent: 3852570 (1974-12-01), Tyler
patent: 4666108 (1987-05-01), Fox
patent: 4792659 (1988-12-01), Thomas
patent: 5118056 (1992-06-01), Jeanise
patent: 5603856 (1997-02-01), Bischoff
patent: 5669588 (1997-09-01), Goldsmith
patent: 6189839 (2001-02-01), Lemieux
patent: 6194685 (2001-02-01), Rutherford
patent: D439168 (2001-03-01), Hickman
patent: 6212825 (2001-04-01), Hopkins, Jr.
patent: 6267332 (2001-07-01), Almblad
patent: 6397701 (2002-06-01), Park
patent: 6618993 (2003-09-01), Burke
patent: 2002/0129552 (2002-09-01), Burke

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