HELICAL NET AND NET-FILTER Russian patent published in 2007 - IPC B21F27/12 B01D39/12 

FIELD: protection of different systems and mechanism against penetration inside them foreign objects, filtering members for different media, for sieving, for protecting against mechanical damages or against insects or rodents, for decoration of vents, for sinks of baths or wash stands.

SUBSTANCE: net is in the form of helix whose turns may be equally on non-equally spaced from rotation point or axis. Turns of helix are twisted by two or more rows. Net is made of materials that allow to produce helix such as polymers, metals, glass and(or) of their combinations and it is covered with protecting and(or) decorative coatings, for example of paints, plated metal or polymers. Wire of which helix is formed has cross section in the form of trapezium, rectangle, circle, square, triangle, oval or it is hollow one.

EFFECT: improved self-cleaning properties, increased strength of helical net, their high resistance against outer deformations, returning to initial state after changing their shape.

16 cl, 7 dwg