Construction of an arena floor adapted to selectively raise and

Details Construction of an arena floor adapted to selectively raise and Construction of an arena floor adapted to selectively raise and

1986-11-21

1988-04-05

Murtagh, John E.

Static structures (e.g., buildings)

With lifting or handling means for primary component or...

Position adjusting means; e.g., leveling

52 7, F04F 15024

Patent

active

047350245

ABSTRACT:
A combination comprising a movable floor for arenas or the like adapted to be elevated or lowered by lifting elements above the level of a stationary base floor, a plurality of first box-like framing elements having lifting brackets and beam elements interconnected to form a grid pattern throughout the movable floor structure, the lifting elements being supported in a plurality of second box-like framing elements embedded in a base floor beneath the movable floor. Flooring sections made preferably of concrete extend between the beam elements and first box-like framing elements to complete the movable floor structure. The lifting elements each include a vertically extending threaded shaft upon which a horizontally extending lifting plate is removably mounted. The lifting plate extends beneath the lifting brackets attached to the first box-like framing elements. The grid construction of the movable floor permits lifting forces to be carried around a first box-like framing element through adjacent beams to adjacent box-like framing elements and lifting brackets in the happenstance that one lifting element fails.

REFERENCES:
patent: 3067843 (1962-12-01), Rushtoh
patent: 4438610 (1984-03-01), Fifer
patent: 4621468 (1986-11-01), Likozar
patent: 4631879 (1986-12-01), Kobayashi

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