Patent ID: 7114904
Filing Date: 2006-10-03
Classification: B65G

Abstract:
1. A push-back storage system comprising: an elongated storing lane defining opposite front and rear ends; at least one pair of spaced-apart parallel elongated rails extending between said front and rear ends of said storing lane and being inclined downwardly from said rear end towards said front end, each said rail comprising a pair of elongated inclined side walls integrally linked at a common elongated load-bearing top edge; and at least one cart rollably carried by said pair of rails and rollable along said pair of rails between said storing lane front and rear ends, said cart comprising a load-bearing frame rollably carrying a number of wheels each engaging a corresponding one of said rails, each said wheel comprising a cylindrical web rotatable about a rotational axis and a pair of side flanges radially extending from and axially spaced-apart along said wheel web so as to define a cylindrical rail-engaging surface on said wheel web between said spaced-apart side flanges, said web rail-engaging surface being wider than said top edge of said corresponding rail so as to allow a single contact-point, low-friction rolling engagement between said wheel web and said rail top edge.