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US 5,181,663 AGranted
Tub grinder with screen portion
AssigneeNone recorded
InventorsJohn P. Dorscht, Patrick J. Hogan
Life of this patent
Estimating the term…
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AssigneeNone recorded
InventorsJohn P. Dorscht, Patrick J. Hogan
Estimating the term…
A tub grinder is disclosed in which material which is already sufficiently small in size, primarily being abrasive aggregate or earthen material, may be discharged from the receptacle to bypass the comminution apparatus and thus substantially reduce wear thereto. A portion of the cylindrical wall of the receptacle is provided with classifying openings, for example by providing a screened opening as a band around the receptacle. The classifying openings permit material which is already smaller than the size of the openings to fall therethrough, thereby bypassing the comminution apparatus. Preferably, a conveyor is positioned beneath the receptacle, to catch and discharge the material which falls through the screen or other classifying openings to a pile located away from the receptacle. Sidewalls positioned on either side of the receptacle stop any material which is flung out to the side, and redirect it down onto the conveyer. The apparatus may be advantageously mounted on a trailer, for towing from site to site. In such an arrangement, it is advantageous to provide an integrated, transportable system, in which the receptacle is moveable between an operating position and a transportation position.
Tub grinding apparatus, comprising:
Dependencies are inferred from the claim text.
No related US applications are recorded in the indexed filing history.
With rotating knives: tub-grinders
Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special…: with…
Disintegrating plant with or without drying of the material: transportable disintegrating plant
Crushing, pulverising, or disintegrating in general
Term ended 3 Feb 2012 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of the Invention
This invention relates to comminution apparatus, and in particular to tub grinders of the type having a receptacle defined by a stationary angled floor and a rotating cylindrical wall. The wall is positioned adjacent to the floor with its axis at right angle to the floor and at a substantial angle away from the vertical. An aperture in the floor leads to a hammer mill or other comminution means.
2. Description of the Prior Art
In order that the invention may be more clearly understood, the preferred embodiment thereof will now be described in detail by way of example, with reference to &.he accompanying drawings, in which:
FIG. 1 is a perspective view of the apparatus mounted on a trailer;
FIG. 2 is a side elevation view of the apparatus;
As illustrated in the accompanying drawings, the apparatus includes a receptacle 1 defined by a cylindrical wall 2 positioned with its axis at a right angle to a stationary angled floor 3 mounted across a portion of a support assembly 4. The support assembly is mounted on a trailer 5, and is pivotable about pivot pins 6 between an operating position and a transportation position, as seen best in FIG. 3.
As seen best in FIG. 5, the support assembly 4 consists of a receptacle support frame 7 welded to the floor support frame 8. Receptacle support rollers are mounted on the support assembly, including upper and lower side rollers 9 and 10 respectively (two of each, i.e. one on each side), and four base rollers 11.
A hammer mill 12 is positioned with its hammers 13 projecting up through the floor of the receptacle in conventional fashion. The hammer mill is powered by a diesel engine 14. The receptacle wall is rotated in conventional fashion via a hydraulic motor 15 which drives a receptacle drive chain 16. The hammer mill shoots the material out at high velocity into a discharge chute 17, which may include a conveyor 18.