HOSE DEVICE Russian patent published in 2020 - IPC F16L11/00 

FIELD: machine building.

SUBSTANCE: invention relates to a hose device comprising outer hose (11) of a flexible material and inner hose (12) of elastic material for pumping a fluid through said hose device, wherein by the action of the elastic inner hose (12), the hose device has a shorter length in the compressed state with no pressure of the fluid in the inner space of the elastic inner hose (12) and a larger length in the expanded state, when fluid medium pressure is applied to elastic inner sleeve (12) inner space. When the hose device is in the compressed state, outer hose (11) is assembled into the bellows, and when the hose device is in the expanded state, outer sleeve (11) serves to control and limit expansion of inner hose (12). Between the elastic inner sleeve (12) and outer sleeve (11) along at least that part of the elastic inner sleeve (12) length, on which in the compressed state of the hose the bellows of outer sleeve (11) is assembled, provided is at least one bushing part (6) for protection of elastic inner sleeve (12) against wear by folds of bellows of outer sleeve (11).

EFFECT: invention eliminates possibility of hose destruction after long time of use.

19 cl, 6 dwg