Static structures (e.g. – buildings) – Barrier or major section mounted for in situ repositioning;... – Roof movable as entity relative to its substructure
Patent
1995-07-07
1997-08-12
Safavi, Michael
Static structures (e.g., buildings)
Barrier or major section mounted for in situ repositioning;...
Roof movable as entity relative to its substructure
47 17, 52 13, 52 18, 52 69, E04B 716, E04B 712
Patent
active
056553358
ABSTRACT:
A greenhouse roof structure for the usual rectangular in plan greenhouse comprises at least two rectangular roof panels each having a lower edge hinged to the structure for movement about a respective horizontal hinge axis. The roof panels are movable about their hinge axes between a fully closed position in which their upper edges meet to form a roof peak, and a fully open position in which they extend generally vertically at least approximately parallel to one another for the greenhouse space to be upwardly fully open to the ambient atmosphere, as is needed for example to "harden" new plants before they are exposed to the harsher ambient conditions outside the greenhouse. Preferably trusses extend transversely between the two outer side walls, support members are carried by the trusses, and transversely extending upwardly convex arch members are each connected at its ends to respective support members to connect them against the forces, such as wind forces, applied by the roof panels. A ridge post member for each arch member extends vertically from its transverse center point and a ridge member is mounted on the ridge post members. Preferably the roof panels are pivotally mounted on the arch members closely adjacent to the support members.
REFERENCES:
patent: 104142 (1870-06-01), Hall
patent: 673497 (1901-05-01), Dietsch
patent: 792902 (1905-06-01), Kelly
patent: 1689131 (1928-10-01), Goodwin
patent: 2896558 (1959-07-01), Colburn, Jr.
patent: 3182581 (1965-05-01), Poederoyen et al.
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