Deflection structure for tub grinder

A tub grinder comprising:

• a floor;
• a tub positioned above the floor, the tub having a side wall, the tub being rotatable relative to the floor about a vertical axis;
• a grinder mounted at an opening in the floor, the grinder having cutters that define a circular reducing boundary when the grinder is rotated in a reducing direction;
• a screen positioned beneath the grinder;
• and
• a deflection structure positioned near the floor above the grinder, the deflection structure being positioned above a portion of the grinder outside the circular reducing boundary of the grinder, wherein at least a portion of the deflection structure is positioned below a top, center of the circular reducing boundary of the grinder, and wherein the trajectory of material ejected past the deflection structure has an angle of no more than 50 degrees.

A tub grinder comprising:

• a floor;
• a tub positioned above the floor, the tub having a side wall, the tub being rotatable relative to the floor about a vertical axis;
• a grinder mounted at an opening in the floor, the grinder having cutters that define a circular reducing boundary when the grinder is rotated in a reducing direction;
• a screen positioned beneath the grinder;
• and
• a deflection structure positioned near the floor above the grinder, the deflection structure including first and second planar deflecting portions, the second deflection portion being oriented closer to horizontal than the first deflection portion, wherein at least part of the second deflecting portion is located below a top, dead center of the reducing boundary of the grinder.

A comminuting apparatus comprising:

• a bottom plate;
• a tub disposed at the bottom plate and being rotatable relative to the bottom plate;
• a comminuting drum that extends partially through the bottom plate, the comminuting drum being configured to rotate about a horizontal axis of rotation, the comminuting drum being configured to throw material in the tub along a material flow path;
• and
• a deflection structure that extends partially over the drum, the deflection structure defining an exit aperture through which material is thrown by the comminuting drum during operation, the deflection structure including a first planar member and a second planar member, the second planar member being oriented generally horizontal and the first planar member beings angled relative to the second planar member,
• whereby material within the tub that strikes the first plate slides along the first plate to the second plate at which the material changes direction and reduces speed.

A tub grinder comprising:

• a floor;
• a tub positioned above the floor, the tub having a side wall, the tub being rotatable relative to the floor about a vertical axis;
• a grinder mounted at an opening in the floor, the grinder having cutters that define a circular reducing boundary when the grinder is rotated in a reducing direction;
• a screen positioned beneath the grinder;
• and
• a deflection structure positioned near the floor above the grinder, the deflection structure being positioned above a portion of the grinder outside the circular reducing boundary of the grinder, wherein at least a portion of the deflection structure is positioned below a top, center of the circular reducing boundary of the grinder, and wherein the deflection structure covers at least 35 percent of a top view area of the grinder, the top view area of the grinder being equal to a length of the grinder multiplied by a diameter of the circular reducing boundary of the grinder.