A trolley wheel assembly includes a wheel portion rotatably positioned around a hub portion and at least one sliding member positioned between the wheel portion and the hub portion. The sliding member defines a mating surface for mating with a generally correspondingly formed mating surface of the wheel...http://www.google.es/patents/US20040109621?utm_source=gb-gplus-sharePatente US20040109621 - Journal bearing for trolley wheel
Número de solicitud: 10/723,970 Número de publicación: US 2004/0109621 A1 Fecha de presentación: 26 Nov 2003 Patente emitida: US6880469 ( Fecha de emisión 19 Abr 2005)
