CHECK VALVE Russian patent published in 2022 - IPC F16K15/02 

FIELD: shut off the reverse flow of fluid.

SUBSTANCE: invention is intended to shut off the reverse flow of fluid, predominantly gaseous media and can be used, in particular, in positive displacement blowers. The check valve comprises a body with an inlet channel and a seat at the end of the inlet channel, a shut-off body in the form of a body of rotation, movement limiters of the shut-off body fixed on the body. The locking body is made of a round tube open at the ends with an outer layer of an elastic material. The saddle and the inlet channel are made with a rectangular cross-sectional profile and a narrow surface around the perimeter in contact with the shut-off body, geometrically similar to the contact surface of the shut-off body. Rods located in the immediate vicinity of the ends of the locking body are fixed on the body with one of their ends. The opposite end of the rods has a thread and a nut. Inside the locking body, a pressure rail is freely placed, at the ends of which support rings are rigidly fixed, freely put on the rods. Compression springs are placed between the nuts and the support rings on the rods. The input channel has transverse bridges.

EFFECT: invention is aimed at increasing the capacity of the check valve and the reliability of its operation.

3 cl, 4 dwg