Richard A Nunis: Debris removal system and method for stadiums and arenas. University of Central Florida Research Foundation, Brian S Steinberger, Law Offices of Brian S Steinberger P A, April 6, 2010: US07690493 (3 worldwide citation)

Systems and methods to facilitate the cleaning of arenas, such as stadiums having different seating levels. Pivotable bins can collect and funnel trash from different levels such as the concourse level. A series of tubes or chutes can be fixed to the arena structural undercarriage. Approximately 24″ ...