Patent ID: 6843019

Claim:
A horticultural greenhouse, comprising: a frame; a cover system supported by the frame that includes a tarpaulin having a double-membrane and being inflatable, the tarpaulin having a fixed part secured to the frame and a free edge oppositely disposed from the fixed part and secured to a rolling-up shaft, the tarpaulin being arranged in order to be able to be rotatably rolled-up and unrolled around the rolling-up shaft; a rolling-up system arranged to make the rolling-up shaft rotate in a rolling-up direction to cause the rolling-up of the tarpaulin around the rolling-up shaft, the rolling-up shaft being located generally at the center of a roll formed by the tarpaulin when the tarpaulin is rolled-up around the rolling-up shaft, the fixed part remaining stationary during the rolling-up of the tarpaulin, such that the fixed part remains a non-rolled-up part of the tarpaulin, the roll being proximate the fixed part when the tarpaulin is fully rolled-up, wherein the rolling-up of the tarpaulin opens the horticultural greenhouse; at least one electrical motor to drive the rolling-up system; at least one compressor for injecting air inside the tarpaulin when at least a portion of the tarpaulin is rolled-up around the rolling-up shaft to cause an inflation pressure within the tarpaulin, the air being injected proximate the fixed part of the tarpaulin, the inflation pressure causing the inflation of the non-rolled-up part of the tarpaulin which pushes the roll, causing the roll to move in an unrolling direction so that at least the portion of the tarpaulin unrolls from the roll to increase the non-rolled-up part of the tarpaulin inflated by the compressor, such that an unrolled and inflated portion of the tarpaulin stays behind the roll; and at least one decompression valve within the tarpaulin to allow for deflation of the tarpaulin so that the tarpaulin can be rolled-up after the tarpaulin has been unrolled; wherein the unrolling of the tarpaulin is solely accomplished by using the compressor to inflate the tarpaulin.