E - Fixed Constructions – 04 – B
Patent
E - Fixed Constructions
04
B
160/16, 47/6
E04B 1/00 (2006.01) A01G 9/22 (2006.01) E04H 3/00 (2006.01)
Patent
CA 1190845
IN THE CANADIAN PATENT AND TRADEMARK OFFICE PATENT APPLICATION entitled : Device for opening out and folding back one or more thermal screens inside a hothouse. Applicant : Ives DALLE ABSTRACT OF THE DISCLOSURE The present invention relates to a device for opening out and folding back one or more thermal screens by means of a plurality of extensible chambers moving over and around guiding hoops, which chambers comprise a piston forming the movable ends of the chambers, which device comprises, close to and under the piston of each retracted air chamber, means borne by a structure and placed in contact with the periphery of the chamber and whose function is to slow down the extension of the chamber when the latter is pressurized, in order to ensure a good air distribution in the inflated part of said chamber and so prevent that part from winding itself around the guiding hoop when the screen is opened out.
417831
Dalle Ives
Sim & Mcburney
LandOfFree
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