HYDRAULIC VALVE DEVICE Russian patent published in 2012 - IPC E02F9/22 

FIELD: machine building.

SUBSTANCE: proposed device comprises first and second openings L and N in two-way hydraulic motor D, tank T, pump I, manual valve H and first retaining valve 1A, 8. Note here that manual valve is arranged to communicated openings L, N with tank T and pump I. Note here said valve H has two positions. In first position, pump I is communicated via pipeline F with first opening L while tank T communicates via pipeline G with second opening N. In second position, pump I communicates via pipeline G with second opening N while tank T is communicated via pipeline F with first opening L. Note here that first retaining valve 1A, 8 is arranged between pump I and second opening N to open toward second opening N. Besides, device comprises piston 2 to control first retaining vale 3 arranged to communicate first opening L with second opening N and to open toward second opening N.

EFFECT: higher efficiency.

9 cl, 6 dwg