Apparatus and method for correcting skew of a traveling crane by

Details Apparatus and method for correcting skew of a traveling crane by Apparatus and method for correcting skew of a traveling crane by

1991-12-13

1993-06-08

Oberleitner, Robert J.

Railway rolling stock

Trucks

Overhead crane

B61F 1300

Patent

active

052169570

ABSTRACT:
A skew correcting apparatus for a crane having drive wheels traveling on spaced apart rails which are independently driven. Each one of the drive wheels has an axially extending single diameter cylindrical surface and first and second axially spaced apart radially extending circumferential flanges. The spacing distance of the first flange of each of the first and second wheels is such that, when the crane is in one of the skewed positions the first flange of the leading wheel in the direction of travel engages the faced outer side of the rail head and the engagement of the second flange of the lagging one of the wheels with the inner rail side which it faces is minimized. Each rail head has a shoulder surface including a radius defining a cross-sectional shoulder curvature. The first flange of each one of the wheels also includes a circumferential flange juncture surface adjoining the cylindrical surface. Each flange juncture surface faces a rail head shoulder surface and has a cross-sectional radius such that the flange juncture surface of the leading skewed wheel engages the faced rail head shoulder surface along a cross-sectional line of engagement in each one of the skewed positions. Preferably the radii of the rail head shoulder surface and flange juncture surface are substantially equal so that friction is maximized.

REFERENCES:
patent: 3095829 (1963-07-01), Dehn
patent: 5080021 (1992-01-01), Thorsen

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