COMBINED SEAL Russian patent published in 1997 - IPC

FIELD: mechanical engineering. SUBSTANCE: device is provided with a tank having a throttle at its outlet. The hydraulic unit has a bushing mounted on the housing. The plunger is mounted inside the bushing with a spaced relation. Axially alined end faces of housing and bushing are provided with a ring groove for the end face seal. Inside the bore in the bushing is a contact seal of the plunger. The opening of the bushing and the surface of the bushing are provided with drain bores having drain openings. The drain opening of the hydraulic unit is connected with the tank, which is connected with the pump tank, through a pipe line. EFFECT: enhanced reliability. 1 dwg