Patent ID: 8083072

Claim:
A mobile system for screening material comprising: an elongated structure configured to be rolled over the surface of a public roadway; a vibrating screen assembly coupled to and supported by said elongated structure; a means for receiving rotary power and causing said vibration screen assembly to vibrate; a source of rotary power disposed outside of said vibrating screen assembly and configured so as to be pivoted between operational and transport modes, where the transport mode provides a reduction in a maximum dimension of a combination of said vibrating screen assembly and said source of rotary power; said source of rotary power being free from a closed loop elongated flexible member which couples and provides power transmission from a first circular member and a second circular member which are configured to receive said closed loop elongated flexible member, such that a separation distance between centers of said first circular member and said second circular member vary during one of operation of the vibrating screen and conversion from said operational mode and said transport mode.