END SEAL Russian patent published in 1999 - IPC

FIELD: sealing devices for revolving shafts of pumps, machines and apparatus in chemical, oil producing and other industries. SUBSTANCE: insert screwed into bush project above its surface; they have L-shaped passage engageable with radial cavity of bush; outlet hole of L-shaped passage is located opposite to direction of rotation of bush. Medium being sealed enters L-shaped passage under action of centrifugal force overcoming stiffness of spring and is returned to sealing cavity due to rarefaction at outlet hole of L-shaped passage. EFFECT: avoidance of escape of medium being sealed outside. 3 dwg