Self-ventilating greenhouse

Details Self-ventilating greenhouse Self-ventilating greenhouse

1988-04-21

1989-03-28

Joyce, Harold

52 2, 52 18, 52 64, 52222, 98 4216, 47 17, F24F 702

Patent

active

048153656

ABSTRACT:
A self-ventilating greenhouse and frame therefor. The frame comprises a series of aligned sideposts connected to a series of partially overlapping frame members which support a translucent roof. The frame members are hingedly joined by a series of cross-members which guide the frame members as the roof is opened and closed by means of a worm gear or a rack and pinion.

REFERENCES:
patent: 104142 (1870-06-01), Hall
patent: 1070434 (1913-08-01), Farquhar
patent: 1923217 (1933-08-01), Lafferty
patent: 3028872 (1962-04-01), Cresswell
patent: 4012867 (1977-03-01), Lainchbvry et al.
patent: 4312157 (1982-01-01), Hertel et al.
patent: 4348833 (1982-09-01), Nagoya
patent: 4399738 (1983-08-01), Sharkey
patent: 4510921 (1985-04-01), Yano et al.
patent: 4601136 (1986-07-01), Watanabe
patent: 4672889 (1987-06-01), Lynch

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