Static structures (e.g. – buildings) – Barrier or major section mounted for in situ repositioning;... – Roof movable as entity relative to its substructure
Patent
1994-08-01
1996-08-20
Friedman, Carl D.
Static structures (e.g., buildings)
Barrier or major section mounted for in situ repositioning;...
Roof movable as entity relative to its substructure
E04B 716
Patent
active
055467091
ABSTRACT:
An improved portable platform for the performing arts for providing a generally covered performing stage and being shiftable from a stowed configuration to a performing configuration wherein an upper and a lower roof assembly from a canopy over the stage having a rain exclusion means for preventing the passage of rain through the canopy and for preventing the entry of rain into the platform when in the stowed configuration. The portable platform includes hydraulic actuation means having at least two hydraulic loops, the first of such loops including a hydraulic ram, the ram extending and supporting the roof assembly, the two hydraulic loops being connected by an interrupter adapted to hydraulically isolate the two loops, thereby hydraulically locking the ram to support the roof assembly in the event of a loss of hydraulic pressure in the second hydraulic loop.
REFERENCES:
patent: 2155876 (1939-04-01), Stout
patent: 3181203 (1961-02-01), Wenger
patent: 3258884 (1966-07-01), Wenger
patent: 3417518 (1966-06-01), Jaffe
patent: 3620564 (1971-11-01), Wenger et al.
patent: 3866365 (1975-02-01), Honigman
patent: 4232488 (1980-11-01), Hanley
patent: 5078442 (1992-07-01), Rau et al.
Wenger, The Great Outdoors, 1988, Brochure.
Boers Arie
Decker Matthew J.
Eustice Todd C.
Rau Douglas
Friedman Carl D.
Horton-Richardson Yvonne
Wenger Corporation
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