A rigging system for dragline buckets includes a unitary adaptor having a hoist equalizer aperture at an upper end thereof and bucket hoist chain connectors extending from opposite sides adjacent a lower end of the adaptor. A connector for a dump block extends forwardly of the adaptor. The hoist equalizer aperture is circular and has transversely rounded bearing surfaces which engage with a cross sectionally rounded support surface of a hoist equalizer to permit relative angular movement between...

The invention relates to a dragline bucket wherein the center of gravity is along a line making an angle of at least 90.degree. with a line from the tooth tip to the horizontal pivot axis of the dragline hitch. Also disclosed is a movable hitch.

The dragline bucket has a basket (12) with an open from end and an open top defined by bottom, side and rear walls (14, 16, 18). Cheek plate structures (44) of fabricated steel plate construction are carried by the side walls at the front end of the basket and themselves carry drag attachment points (46). There is a lip plate assembly (52) of fabricated steel plate construction at the front of the bottom wall (14) and carrying attachment points for excavating teeth. An arch (38) of hollow, fabri...

Apparatus for cleaning the path of an endless conveyor of its debris comprising providing a wheel-mounted carriage attachable and detachable to the conveyor to drag or drive the carriage to effect rotation of the drive wheels to effect counter-rotation of a pair of brushes to sweep the debris from the path of the endless conveyor.

The drag rope of a dragline excavator passes over a lower sheave and then under an upper sheave as it is payed out from a drum in the excavator housing. The two sheaves are oriented to deflect the drag rope downward a predetermined angle as it passes between them. This orientation insures that the rotation of both sheaves is controlled by frictional engagement with the drag rope during operation. Such continuous control of the sheaves prevents relative movement between the drag rope and sheaves ...

The invention relates to an apparatus and a method for self-actuated scooping-up of particulate matter stored in a sector-shaped storage space provided with a partition to separate a non-active supply of material from an active supply thereof. The apparatus includes traction and backhaul cables attached to a container guided via respective cable drums and switches controlling the forward and rearward movement thereof. By means of a coupling unit selectively connecting and disconnecting a positiv...

A dragline boom with a pulley around which a hoisting rope passes carried on its free end, mounted with the aid of bearings on a bush installed with the possibility of rotation by means of a pin on a cross-piece secured on the free end of the boom. The pin is arranged perpendicular to the cross-piece, and the longitudinal axis of this pin is offset upwardly relative to the longitudinal axis of the bush.

A support assembly for a drag bucket includes lift lines and pull lines, each secured to a respective link plate pivotably secured to opposite sides of the bucket. Stops on the bucket side walls limit pivoting of the plates, whereby the bucket can selectively be maintained upright or in a dumping position by control of the lines.

A dragline apparatus has an independently controlled front hoist line and rear hoist line. The front hoist line is connected to the forward end of the bucket, and the rear hoist line is connected to the rearward end.

The invention relates to a dragline rigging system (10) which includes a pair of drag lines (12) connected to drag connection points (24) on a dragline bucket (18) for dragging the bucket through material to be excavated, a pair of hoist lines (14) connected to trunnions (30) on the dragline bucket for hoisting the bucket with excavated material during excavation, and a dump line (16) for lowering the front of the bucket (18) during dumping of excavated material. The dump line (16) is arranged t...