Railways – Trolley transfer – Overhead crane
Reexamination Certificate
2007-06-26
2007-06-26
Morano, S. Joseph (Department: 3617)
Railways
Trolley transfer
Overhead crane
Reexamination Certificate
active
10945583
ABSTRACT:
A crane trolley, especially a single-rail trolley with a short overall height, with a traveling mechanism frame (2) having a hoisting mechanism (1), which can travel by running wheels (3, 3a) on a rail, especially a lower flange (4a) of an essentially horizontal beam (4), wherein at least one running wheel (3a) can be driven, and a friction roller (10) interacting with the driven running wheel (3a) is arranged on the underside (4b) of the rail. In order to create a crane trolley that guarantees a reliable reduction in the slippage of the driven running wheel (3a) with a simple design, a pair of friction rollers (10) is provided, which may be positioned against the underside (4b) of the rail by adjusting the spacing from each other via a common pressing mechanism.
REFERENCES:
patent: 3074354 (1963-01-01), Wakkila
patent: 3212455 (1965-10-01), Workman
patent: 3353503 (1967-11-01), Pettit
patent: 3854407 (1974-12-01), Cocroft
patent: 5213045 (1993-05-01), Gersemsky
patent: 5228961 (1993-07-01), Sakai
patent: 5419260 (1995-05-01), Hamilton
patent: 6840393 (2005-01-01), Tu
patent: 0620179 (1998-06-01), None
European Search Report completed Jan. 31, 2006, from corresponding European Application No. EP 04 02 2510.
Appel Erik
Dammer Michael
Flaig Heinrich
Winter Klaus-Jürgen
Demag Cranes & Components GmbH
McCarry, Jr. Robert J.
Morano S. Joseph
Van Dyke Gardner, Linn & Burkhart, LLP
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