I-beam trolley

Details I-beam trolley I-beam trolley

2006-09-13

2009-02-03

Morano, S. Joseph (Department: 3617)

Railways

Suspended

C105S150000

Reexamination Certificate

active

07484461

ABSTRACT:
A trolley for transporting objects hanging from an I-beam normally securely grips or latches to the I-beam via a pair of brake pads that are urged upward against the bottom of the beam by a torsion spring. The torsion spring is released by pulling a lever downward. Applying lateral force to the trolley, preferably by applying a lateral force to the same lever, pulls the trolley along the I-beam as the wheels engaging the upper portion of the I-beam can rotate freely once the brake pads are released. Releasing the lever after the trolling is pulled to the desired location causes the brakes to again firmly grip the I-beam.

REFERENCES:
patent: 2834435 (1958-05-01), Vanderbeck
patent: 3102607 (1963-09-01), Roberts
patent: 3696890 (1972-10-01), Armstrong
patent: 3999630 (1976-12-01), McPhee
patent: 4898099 (1990-02-01), Summa
patent: 5224912 (1993-07-01), Moody
patent: 5524548 (1996-06-01), Fox
patent: 5678663 (1997-10-01), Watanabe et al.
patent: 5685227 (1997-11-01), Gaccetta et al.

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