The invention in the simplest form is a retractable variable rise arena seating apparatus and method. It employs gravity displacement to facilitate adjusting and setting the various platforms, and uses a single drive motor assembly. The seating platforms can use any type of chair design, and is not limited to narrow profile designs. The seating system can be easily employed with minimum labor and time consumption for multi-purpose arenas.
Michael Jay Littlefield - North Berwick ME, US Dexter Arthur Littlefield - North Berwick ME, US
International Classification:
B24B 7/18
Abstract:
A grinding disk, surfacing platform, apparatus and method adaptable to a rotary concrete surfacing machine. A media disk is pivotally attached to a surfacing platform to maintain a substantially coplanar alignment of an abrasive or polishing media surface and the underlying substrate to be polished. The surfacing platform engages with rotating arms of the machine in operation and may be readily be detached by rotating in the opposite direction of operation.