Greenhouse as well as roof element for such a greenhouse...

Details Greenhouse as well as roof element for such a greenhouse... Greenhouse as well as roof element for such a greenhouse...

2005-05-31

2005-05-31

Friedman, Carl D. (Department: 3635)

Static structures (e.g., buildings)

Clerestory or saw-tooth roof

C052S220400, C052S090200, C052S643000, C047S017000

Reexamination Certificate

active

06898902

ABSTRACT:
Greenhouse (1) provided with a roof element (2) having a multiplicity of transverse ribs (12, 13, 14, 15) or pyramids uniformly distributed over the roof element. The roof element can be constructed double-walled as a hollow-core sheet from transparent plastic and can comprise a base sheet with the rib-shaped or pyramid-shaped roof surfaces fixed thereon. The light yield in a horticultural greenhouse can be increased by the roof elements.

REFERENCES:
patent: 3266201 (1966-08-01), Christ-janer
patent: 3591991 (1971-07-01), Zetlin
patent: 4320603 (1982-03-01), Kirschen
patent: 4671025 (1987-06-01), Butler
patent: 34 04 935 (1985-08-01), None
patent: 2 256 209 (1992-12-01), None
patent: 7 809 424 (1980-03-01), None

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