SURFACE CLEANING PNEUMOPULSE GENERATOR Russian patent published in 1994 - IPC

FIELD: cleaning equipment. SUBSTANCE: generator has a case with a built-in body, the case has a cover. The case has a a chamber with drain holes and a release valve built in the chamber. The release valve has a spring-loaded shutoff piston mounted to form an annular under-the-piston cavity. A diaphragm is made double-layer with holes in each layer. The holes are displaced relative to each other to form a solid diaphragm surface. EFFECT: improved structure. 4 cl, 1 dwg