SPRENGEL Russian patent published in 2017 - IPC E04C5/07 F16L3/01 

FIELD: agriculture.

SUBSTANCE: sprengel comprises a carrying solid cylindrical rod of high-strength composite material with the surface laying of ring filaments under tension and with fastening nodes at the ends, made in the form of conical bulges for mounting in the bounding sleeve; an inset element in the form of a cylinder with a cone at the inner base made of a material having the characteristics as per mechanical strength and heat resistance not lower than the corresponding characteristics of the polymeric material of the rod. The composite material of the carrying solid cylindrical rod fixed in a bounding sleeve by blocks and shoulders, is made on the basis of roving of glass, basalt or carbon fibers impregnated with an epoxy compound cured afterwards, and the sleeve is provided with a plug and a fastening element; the inset element is additionally provided with a cone at the outer basis of its cylinder and surrounded by straight filaments of roving fibers tightly adjacent on all sides to form an extended area of straight filaments at the ends of the rod at a distance to the cone larger than the cylinder base diametre, the material of the inset element and the roving of straight and ring filaments having equal values of thermal expansion factors and the ring filaments area being impregnated by topcoat based on an epoxy compound and a roving fiber powder.

EFFECT: increasing the design durability and reliability under the conditions of exposure to solar ultraviolet radiation.

3 dwg