HYDRAULIC DRIVE Russian patent published in 1996 - IPC

FIELD: mechanical engineering. SUBSTANCE: hydraulic drive has hydraulic motor 1 with working spaces connected with the outlets of valve box 4 of by-pass valve 5 through pipe lines 2 and 3. The by- pass valve is mounted inside the valve box to define end face space 6. By-pass valve 5 has housing 7 with radial passageways 8 and axial passageway 9. The housing is provided with spring-loaded valve member 11 that interacts with stop 10 mounted in end space 6 and rigidly connected to the end face of valve box 4. Housing 7 and valve box 4 form additional face space 12, which is in communication with axial passageway 9 and radial passageway 8 through passageway 13 and groove 14. EFFECT: improved design. 1 dwg