CATERPILLAR CARRIER STEERING HYDRAULIC SYSTEM Russian patent published in 2014 - IPC B62D5/65 B62D11/02 

FIELD: transport.

SUBSTANCE: system comprises oil station with delivery and drain lines, metering pump articulated with steering wheel and communicated with pressure and drain hydraulic lines and, via hydraulic lines and normally-closed three-line two-way hydraulic pressure control valves with rod ends of friction gear hydraulic cylinders, their piston ends being communicated via normally-open three-line two-way hydraulic control valves with oil station hydraulic pressure line, and brake hydraulic cylinders with piston spring loaded towards cut-off side. Brake hydraulic cylinders are connected with friction gear control hydraulic cylinders via extra hydraulic lines and extra normally closed three-like two-way hydraulic control valves via extra orifices made in friction gear control hydraulic cylinders to communicate extra hydraulic lines with piston ends at extended rods and, with rod ends, at pulled-in rods.

EFFECT: separate control over LH and RH sides at whatever radius of turn.

3 cl, 2 dwg