Static structures (e.g. – buildings) – With stadium or auditorium feature – Movable stage
Patent
1998-09-29
2000-05-16
Aubrey, Beth A.
Static structures (e.g., buildings)
With stadium or auditorium feature
Movable stage
52 6, 182223, E04H 326
Patent
active
060619708
ABSTRACT:
An electrically operated multiple folding stage system which enables a number of linked stage systems to move sequentially from a vertical to horizontal position (unfolding), or from a horizontal to a vertical position (folding-up), as a unit in a single smooth operation. The multiple folding stage system includes first and second stage systems connected in series in a front/back direction each having a front stage component and a rear stage component connected with one another in a manner to be freely folded or unfolded in such a way that a connection point between the front and rear stage components moves in a vertical direction, a first link bar provided at the rear stage component of the first stage system, a second link bar provided at the front stage component of the second stage system, a stay integrally formed with a rear end of the first link bar in a direction inclined relative to a direction of the first link bar, and a link member pivotally connected to a front end of the second link bar at one end thereof and connected to the stay at another end thereof. The stay and the link member are pivotally connected with one another and forming an angle of connection which is substantially smaller than 180 degree when the first and second stage systems are unfolded and laying flat on a floor, and the angle of connection is increased when either the first stage system or second stage system starts folding by rotation of the stay and the link member, thereby increasing a distance between the first stage system and the second stage system. In a further aspect, the multiple folding stage system includes a pair of stays rather than a single stay so that the first stage system and the second stage system are folded or unfolded at the same time.
REFERENCES:
patent: 2978754 (1961-04-01), Wilson
patent: 4872295 (1989-10-01), Fujita
patent: 5016403 (1991-05-01), Fujita
patent: 5069006 (1991-12-01), Fujita
patent: 5325640 (1994-07-01), Luedke et al.
patent: 5613450 (1997-03-01), Wagner et al.
Aubrey Beth A.
Glessner Brian E.
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