Patent ID: 7658023
Filing Date: 2010-02-09
Classification: E02F,F16F

Abstract:
1. A bucket ( 12 ) for a mechanical shovel ( 10 ), the bucket having a hollow body ( 16 ) provided with an inlet ( 14 ) for receiving material into its interior and an outlet ( 15 ) for discharging material therefrom, the bucket having, secured to the body, a door ( 18 ) which is movable relative to the body between a closed condition in which it closes the outlet of the bucket so that material cannot be discharged therefrom, and an open condition in which it permits discharge under gravity of material from the bucket, the bucket also including at least one buffering device ( 22 ) operatively connected between the body and the door of the bucket for buffering movement of the door relative to the body, the bucket being characterized in that each buffering device is in the form of a telescopically extensible and retractable piston-and-cylinder assembly ( movement of the door towards its closed condition is buffered relative to movement of the door towards its open condition and the total volume of the two compartments decreases when the door moves towards its open condition and increases when it moves towards its closed condition; wherein the fluid flow control assembly includes a non-return valve (