Patent ID: 6434864
Filing Date: 2002-08-20
Classification: E02F,Y10S

Abstract:
A frontal loader for providing increased efficiency while minimizing fuel consumption, comprising:an engine connected to a gear, the gear having a first outlet shaft, a second outlet shaft and a pair of gear wheels coupled thereto; a bucket with a corresponding bucket turn comprising a hydraulic cylinder; a boom with a corresponding boom lift comprising a hydraulic cylinders; a turbine transformer coupled with the first outlet shaft, the turbine transformer having an outlet shaft coupled to loader wheels by a gearbox and a driving axle; working equipment including; a variable displacement pump having: a hydraulic servo, a shaft coupled with the second outlet shaft of the gear, and a suction line with a check valve; the variable displacement pump coupled via a first hydraulic line to a boom lift distributor; the boom lift distributor having an outlet coupled to the boom lift by supply lines and a check valve and coupled to a bucket turn distributor by a second hydraulic line, the boom lift distributor having a lifting and lowering control chamber; the bucket turn distributor having a discharge port coupled with a tank by a third hydraulic line, the bucket turn distributor having an excavating and unloading control chamber, an outlet for the bucket turn distributor having supply lines and a check valve coupled with the bucket turn; a hydraulic distributor having a first control chamber and a second control chamber, the suction line of the variable displacement pump being coupled by a first hydraulic distributor line to the hydraulic distributor, by a second hydraulic distributor line to a pneumohydraulic accumulator, and by a third hydraulic distributor line and two check valves to the bucket turn and boom lift; the first control chamber of the hydraulic distributor being connected to the excavating and unloading control chamber of the bucket turn by separate hydraulic lines, a two position valve and a first valve, the two position valve coupled to the first hydraulic line by a control line; the second control chamber of the hydraulic distributor being connected with the lifting and lowering control chamber of the boom lift by two separate lines and a second valve; and a remote proportional control block with a control crank coupled with the excavating and unloading control chamber of the bucket turn by a pair of lines, with the lifting and lowering control chamber of the boom lift by a pair of lines and with the hydraulic servo of the variable displacement pump by three valves.