Greenhouse curtain system

Details Greenhouse curtain system Greenhouse curtain system

1993-10-26

1996-05-28

Johnson, Blair M.

Flexible or portable closure, partition, or panel

Plural and/or with rigid closure

Roll type

52276, 52 63, 160243, 160 40, 160253, E06B 908

Patent

active

055202365

ABSTRACT:
A novel greenhouse curtain system has a plurality of movable curtains oriented vertically one above the other to form a flexible wall. Each curtain is supported by a fixed upper edge, and the vertical position of the lower extent of each curtain may be adjusted by means of a traveling spindle used to furl or unfurl the curtain. The traveling spindle rises and descends as the curtain is furled (raised) or unfurled (lowered), and is rotated by a tensioned cable wrapped in opposite directions around two drums aligned concentrically one on end of the roller bar. The cable is anchored on one end below one of the drums, and is wrapped in opposite manner respectively around both drums and passes vertically to a pulley, and then to a driving means such as a winch. The dimensions of the drums are such that the curtain remains in stable position as long as there is no movement of the cable to or from the driving means. Sealing means is engaged by each roll when the roll is lowered to its full extent to provide a weather seal.

REFERENCES:
patent: 164524 (1875-06-01), Converse
patent: 597562 (1898-01-01), Paul et al.
patent: 692455 (1902-02-01), Kepler
patent: 862644 (1907-08-01), Kepler
patent: 4244417 (1981-01-01), Taylor

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