Polar crane and related method

Details Polar crane and related method Polar crane and related method

1996-01-11

1998-01-13

Morano, S. Joseph

Railway rolling stock

Trucks

Overhead crane

212226, 212318, B61F 1300

Patent

active

057067368

ABSTRACT:
Disclosed is a polar crane supported by a rail and having a bridge and a bridge-supporting end truck at each end of the bridge. Each end truck has, for either direction of revolving bridge motion, a leading wheel contacting the rail. In the improvement, the leading wheel of each end truck has a single flange and the flange is inward of the rail. Skewed crane "lock-up" is thereby substantially prevented. A related method for modifying a polar crane includes raising the first end truck away from the rail, removing a two-flange wheel (the leading wheel) from the first end truck and installing a one-flange wheel in place thereof.

REFERENCES:
patent: 267149 (1882-11-01), Capen
patent: 3095829 (1963-07-01), Dehn
patent: 3246775 (1966-04-01), Connelly et al.
patent: 3703016 (1972-11-01), Schramm et al.
patent: 3887080 (1975-06-01), Wilson
patent: 4161144 (1979-07-01), Raugulis
patent: 5216957 (1993-06-01), Thorsen
patent: 5492067 (1996-02-01), Anderson

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