Device for lifting and re-positioning a track used in...

Railways – Track layers – Track raising car

Reexamination Certificate

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Details

C104S007200, C104S004000

Reexamination Certificate

active

07089867

ABSTRACT:
A device for use in television and motion picture industries lifts and re-positions a track on which camera dolly or crane is located. The device includes a first bar member of a substantially elongated shape comprising a hinge, a first caster wheel assembly, and a first track hook which is positioned at one end of the first bar member. A second bar member of a substantially elongated shape shorter than the first bar member is pivotably attached to the first bar member via the hinge such that when in a closed position the first and second bar members form a substantially straight line. The second bar member further comprises a second caster wheel assembly and a second track hook which is positioned at one end of the second bar member, this one end of the second bar member being at an opposite location than the other end of the first bar member along the substantially straight line. When each track hook is positioned under each rail of the track and downward force is applied to the first bar member, the first and second bar members form the substantially straight line thereby lifting the track off the ground. The track and a camera dolly can then be rolled on wheels to a new location quickly and effortlessly.

REFERENCES:
patent: 1505632 (1924-08-01), Finley
patent: 3192871 (1965-07-01), Krause, Jr.
patent: 4989782 (1991-02-01), McKie
patent: 5711227 (1998-01-01), Johnson
patent: 5887787 (1999-03-01), Sladana, III
patent: 5971456 (1999-10-01), van Capelleveen
patent: 6033177 (2000-03-01), Kooima
patent: 6349994 (2002-02-01), Chapman
patent: 6435421 (2002-08-01), Peterson
patent: 6557775 (2003-05-01), Brinson et al.
patent: 6626117 (2003-09-01), Chapman
patent: 2003/0196565 (2003-10-01), Decker et al.

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