Other

Lawrence H McSweeney

Larry J McSweeney

Ronald D Mills

A cutting tool configuration includes a cutting bit insert configured in the shape of an octagonal pyramid. The cutting bit insert includes a number of portions, each of which has faces which slope at different angles with respect to the longitudinal axis of the cutting bit insert. The cutting bit insert also includes a flange which is surrounded by a ring. The ring is softer than the cutting bit insert.

Cutting bit insert configured in a polygonal pyramid shape and having a ring mounted in surrounding relationship with the insert

An insert cooperates with the channel in a material moving board. The insert is adapted to reach at least 3/4 of the way from the front edge to the rear edge of the board. The insert is preferably brazed to the channel and is made primarily of tungsten carbide and a cobalt binder.

Insert for board

A roof-drilling system for use in subterranean mining applications and the like in which the drill head of a roof drilling machine is arranged such that the receiving cavity of its chuck is configured having a lost motion association with the drive-in portion of starter and driver drill steel rods. The lower surface of a retainer fixed to the drill head and having a non-circular aperture formed therein serves to define one bearing surface for utilizing the drill head itself to pull the assemblage of drill steel from a completed bore. To remove the drill steel driver component from the drill head chuck, the miner grasps the lowermost portion and rotates it a relatively small amount. To provide for interlocking of various components of the drill steel, i.e. driver component, extension components finishing rods and the like, the tips of the male ends of each component are formed having a shallow external groove and each corresponding female socket is provided with a corresponding transversely oriented mirror image bore. Conventional wire or its equivalent is inserted within the bore by the miner in the course of assembly the drill steel during a drilling operation.

Roof drilling system

A roof-drilling system for use in subterranean mining applications and the like in which the drill head of a roof drilling machine is arranged such that the receiving cavity of its chuck is configured having lost motion association with the drive-in portion of starter and driver drill steel rods. The lower surface of a retainer fixed to the drill head and having a non-circular aperture formed therein serves to define one bearing surface for utilizing the drill head itself to pull the assemblage of drill steel from a completed bore. To remove the drill steel driver component from the drill head chuck, the miner grasps the lowermost portion and rotates it a relatively small amount. To provide for interlocking of various components of the drill steel, i.e. driver component, extension components finishing rods and the like, the tips of the male ends of each component are formed having a shallow external groove and each corresponding female socket is provided with a corresponding transversely oriented mirror image bore. Conventional wire or its equivalent is inserted within the bore by the miner in the course of assembling the drill steel during a drilling operation.

A roof-drilling system for use in subterranean mining applications and the like in which the drill head of a roof drilling machine is arranged such that the receiving cavity of its chuck is configured having a lost motion association with the drive-in portion of starter and driver drill steel rods. The lower surface of a retainer fixed to the drill head and having a non-circular aperture formed therein serves to define one bearing surface for utilizing the drill head itself to pull the assemblage of drill steel from a completed bore. To remove the drill steel driver component from the drill head chuck, the miner grasps the lowermost portion and rotates it a relatively small amount, for example about 1/8 turn. To provide for interlocking of the various components of the drill steel, i.e. driver component, extension components finishing rods and the like, the tip of the male ends of each component are formed having a shallow groove and each corresponding female socket is provided with a corresponding transversely oriented bore. Conventional wire or its' equivalent is inserted within the bore by the miner in the course of assembling the drill steel during a drilling operation.

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South Point, OH, United States of America

Lawrence H McSweeney