T. J. Gundlach Machine Company

Rexnord Gmbh

J.m.j. Industries, Inc.

Theodore F Gundlach

Arthur L Hawthorne

Patrick W Ryan

Randall S Shinn

James D Fraser

This apparatus (10) for reducing lumps of coal, and the like, on a grid (14) disposed over a material-receiving area (16) includes a carriage (12) guided across the grid (14) on a track (44) by a drive system (50) and having roll assemblies (60) mounted thereto. Each roll assembly (60) includes a drive roll (62) having stationary shaft assemblies (66,68) mounted to the carriage (12) and driven by an internally mounted motor (78), and a set of pick rings (64) mounted to the drive roll (62) at longitudinally spaced intervals and having pick circles with picks (90) pointing in both directions. The material-receiving area includes a conveyor system which, when the area is wide, includes a longitudinal conveyor (100) flanked by a plurality of lateral feeder conveyors (102).

Traversing roll breaker apparatus

A coal crusher roll includes a smooth tubular cylindrical back-up roll having a series of regularly spaced tapped radial holes to receive bolts by which eight identical shell segments may be fastened on the back-up roll. The holes at the axial ends of the segments are undercut to provide a rabbet into which fits the tang of a special lifting hook by which the segment can be easily handled by a lightweight crane. A recess in the central part of the segment defined by a peripheral berm around the backside of the segment reduces the weight of the segment, provides a place for receiving balancing weights, and simplifies the face fit machining for the segment with the back-up roll.

Segmental shell for a coal crusher roll

A coal crusher roll includes a smooth tubular cylindrical back-up roll having a series of regularly spaced tapped radial holes to receive bolts by which eight identical shell segments may be fastened on the back-up roll. The holes at the axial ends of the segment are undercut to provide a rabbet into which fits the tang of a special lifting hook by which the segment can be easily handled by a lightweight crane. A recess in the central part of the segment defined by a peripheral berm around the backside of the segment reduces the weight of the segment, provides a place for receiving balancing weights, and simplifies the face fit machining for the segment with the back-up roll.

Segmental shell for a coal crusher roll including specialized removal

A dust abatement device including an intake or collecting means for delivering air to a rotating fan constituting a propulsion means, and outlet means directing air from the fan in a curtain at an area of dust concentration to inhibit dust movement out of the area. The intake means includes a duct extending from the fan to the area of dust concentration to pick up and deliver air-borne dry dust particulate from such area to the fan, the fan mixing the dry dust particulate with liquid sprayed on the fan to provide a slurry, and the outlet means directing the air and slurry from the fan to the area of dust concentration so that the slurry further wets the dust particulate at such area. The dust abatement device can be mounted on a machine that includes a mechanism for acting on material in a manner so as to create the area of dust concentration. More particularly, the dust-forming mechanism can be the cutter head of a continuous mining machine that rotates in a direction to cause an air flow rearwardly and upwardly from the area of dust concentration. In this event, the fan delivers the air and slurry in a spray to the cutter head and substantially in a direction counter to the air flow created by the cutter head to retard such flow and movement of the dry dust particulate away from the area of dust concentration.

Dust abatement device and method of dust abatement

The replaceable striking plate, which has a leading impact face, extends between opposite rotor rings of a disintegrating mill, and provides the basis of an impact system. The leading impact face extends rearwardly from its inner edge toward its outer edge at an angle with respect to a radius substantially within the range of fifteen (15) degrees to thirty (30) degrees for the major portion of its radial height, and extends relatively forwardly to its outer edge for a minor portion of its radial height. The major impact face portion has sufficient radial height so that a slug of particles striking the face will all impact on that face without some particles over-shooting the top and thereby missing impact. A clean face surface is provided for the impact of each succeeding 'slug or ribbon sheet' of particles as they strike the face. A portion of the new slug does not impact onto a bed of old particles still remaining on the impact face from a previous slug. The radial height of the plate rearwardly from the impact face between the inner and outer edges is sufficient to maintain substantially the same angle and height of the major impact face portion during use and wear. The minor impact fact portion has sufficient radial height to accommodate a wash area at the juncture of the major and minor face portion as wear occurs. Integral flanges provided at each end of the plate and extending forwardly of the leading impact face, are provided with outwardly converging, flow-directing side surfaces adjacent the leading impact face and extending from the inner to the outer edge. The attachment of the striking plate between the rotor rings compresses the striking plate endwise for increased material strength.

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Belleville, IL, United States of America

Theodore F Gundlach