VACUUM REGULATOR Russian patent published in 1995 - IPC

FIELD: agricultural engineering. SUBSTANCE: vacuum regulator has housing 1 accommodating atmospheric pressure chamber 2 and variable vacuum chamber 3. Chambers have common wall made in form of flexible spring-loaded diaphragm-bellows 4. Fitted in center of diaphragm- bellows 4 is vertical shutter 8 coated by material with low friction coefficient, provided with triangular cutout in base, with its point moving along guide 9 directed towards diaphragm, and installed for overlapping outlet branch pipe 10 arranged in vacuum chamber inside air branch pipe 11. The latter is installed in horizontal plane with clearance relative to shutter. Inlet hole of outlet branch pipe and outlet hole of air branch pipe have shape identical to cutout of shutter. Bases of holes are matched and are arranged parallel to base of cutout. Base of air branch pipe is elongated, extending to edge of base of inlet branch pipe, and it has wedge-type stop 13 whose acute angle is pointed in direction opposite to bases of branch pipes and is equal to angles of catches secured on shutter at both sides of triangular cutout. Edges of elongated base of air branch pipe, as well as walls of inlet hole of outlet branch pipe in contact with shutter, are also coated with low friction coefficient material. EFFECT: enlarged operating capabilities. 4 dwg