Abstract: A diamond mining core drill bit tool including a cylindrical body with first and second ends and an inner axial opening therethrough, the cylindrical body having a ring groove extending about the second end; the tool further including cutting segments circumferentially spaced about the second end; the tool having a first weld bead between a first portion of the segments and the second end of the cylindrical body; the tool further including at least one weld ring wherein the ring groove is shaped to receive the at least one weld ring such that the at least one weld ring extends about the ring grove; the tool further including at least one second weld bead between a second portion of the segment and the ring groove and a method for the same.

Abstract: A product and method to eliminate blade spacers in blade heads or stacks that are formed by multiple blades fixed relative to one another including a plurality of spacerless blades wherein the spacerless blades include a blade core with a blade core thickness that is greater than a segment thickness of grinding and/or cutting segments fixed to the blade core to allow core-to-core contact between adjacent blades in the plurality of spacerless circular blades while also producing segments spacings in the plurality of segments between the adjacent blades without the need for blade spacers.

Abstract: A method of making a combination tool including a mining drill bit and reamer. The combination tool includes drill bit body having a plurality of cutting segments attached thereto, a reamer body having a plurality of reaming segments attached thereto, and the drill bit body and the reamer body being configured to selectively attach to the one another. The cutting segments and reamer segments being attached by laser welding to the drill bit body and reamer body, respectively.

Abstract: A core drill bit includes an elongate hollow cylindrical body having opposite first and second end sections, a plurality of cutting segments with a connecting portion joined to the second end section, a plurality of reinforcing members joined to the second end section between the cutting segments and contacting adjacent cutting segments to offer rotational support thereto, and a plurality of current concentrators disposed on one or both of the second end section and the connecting portion. The cutting segments being capacitive discharge welded to the second end section whereby the surface of the second end section melts during the welding to affix the cutting segments with the tool body. The cutting segments include diamonds dispersed therein with portions having varying diamond concentrations.

Abstract: A method of making a combination tool including a mining drill bit and reamer. The combination tool includes drill bit body having a plurality of cutting segments attached thereto, a reamer body having a plurality of reaming segments attached thereto, and the drill bit body and the reamer body being configured to selectively attach to the one another. The cutting segments and reamer segments being attached by laser welding to the drill bit body and reamer body, respectively.

Abstract: A core drill bit includes an elongate hollow cylindrical body having opposite first and second end sections, a plurality of cutting segments with a connecting portion joined to the second end section, a plurality of reinforcing members joined to the second end section between the cutting segments and contacting adjacent cutting segments to offer rotational support thereto, and a plurality of current concentrators disposed on one or both of the second end section and the connecting portion. The cutting segments being capacitive discharge welded to the second end section whereby the surface of the second end section melts during the welding to affix the cutting segments with the tool body. The cutting segments include diamonds dispersed therein with portions having varying diamond concentrations.

Abstract: A core drill bit includes an elongate hollow cylindrical body having opposite first and second ends with an end section having an end face defining an annular non-planar surface. The cutting head includes a plurality of circumferentially spaced apart cutting segments, the cutting segments being electrical welded to the non-planar surface whereby raised portions of the surface melt during the welding to affix the cutting segments with the face of the tool body.

Abstract: A saw chain for cutting aggregate materials comprises a plurality of identically shaped interconnected links. Each link has first and second ends configured such that a first end of one link is connected to a second end of an adjacent link of the saw chain. The first end of each link includes spaced apart tabs, and the second end of each link includes a tab. The second end tab of each link is dimensioned to be pivotally received between the first end tabs of an adjacent link. A plurality of fasteners interconnects the links, the fasteners being configured to at least partially protect the saw chain protecting the links against impacts.

Abstract: A device comprises an implement configured to be driven and a first motor and a second motor. Each motor includes a rotational output shaft and a transmission assembly connected to the output shaft. The output shafts of the first and second motors are coupled together by the transmission assemblies such that the output shafts turn at the same rate. The first and second motors contribute equally to the driving of the implement.

Abstract: A concrete or asphalt profiling apparatus which operates without the use of a wetting agent includes a housing that encloses a plurality of diamond-tipped blades mounted to an arbor and adapted for high-speed rotation, and a suction device in communication with an area enclosed by the housing and configured to generate a suction force so to remove non-wetted dust generated during a profiling operation. During the profiling operation, a mixture of non-wetted dust and air can be drawn from the housing through a conduit and into a container by means of the suction device. An internally supported filter membrane extending into the container separates the concrete dust from the air in the mixture such that a portion of the concrete dust falls into a lower chamber and a portion of the concrete dust cakes on the filter membrane. The apparatus further includes a compressed air port that is adapted to selectively expel compressed air toward the filter membrane to dislodge concrete dust caked thereon.

Abstract: The present invention provides a forward motion speed control system for a self-propelled concrete saw, a self-propelled concrete saw equipped with a forward motion speed control system and a method of controlling the forward motion speed of a concrete saw during a cutting or scoring operation. In one preferred embodiment of the invention, the forward motion speed control system senses and monitors the speed of a power plant transmitting rotational energy to a saw blade and adjusts the forward motion speed of the self-propelled concrete saw to maximize the forward motion speed of the self-propelled concrete saw while maintaining the speed of the power plant in a peak operational range.

Abstract: The present invention provides a forward motion speed control system for a self-propelled concrete saw, a self-propelled concrete saw equipped with a forward motion speed control system and a method of controlling the forward motion speed of a concrete saw during a cutting or scoring operation. In one preferred embodiment of the invention, the forward motion speed control system senses and monitors the speed of a power plant transmitting rotational energy to a saw blade and adjusts the forward motion speed of the self-propelled concrete saw to maximize the forward motion speed of the self-propelled concrete saw while maintaining the speed of the power plant in a peak operational range.

Abstract: In a preferred embodiment the core drilling rig of the present invention includes a base, a vertically extending mast, a movable carriage mounted on the mast, an electric powered motor for rotatably driving a core drill bit, and a control system for controlling the supply of electric power to the drive motor. The control system includes a motion sensitive device for detecting the unwanted movement of the base and suspending the supply of electric power to the motor.

Abstract: A portable wire saw for cutting materials such as stone, concrete, asphalt and the like such as highway lane barriers. The portable wire saw includes a frame having a base on which is mounted a power source. Attached to the base is a plurality of wheels for easy portable movement of the wire saw. At least one of the wheels also provides a pivot point for the frame so that the wire saw can be pivoted between a cutting position and a non-cutting position. The power source drives a wire saw blade carried on a triangular support structure consisting of two pulleys and a drive wheel. The drive wheel is operably connected to the power source. The position of the pulleys is capable of being adjusted relative to the drive wheel. In a preferred embodiment the triangular support structure is arranged in a vertical orientation with the upper pulley functioning to keep the return path of the wire saw blade from having to pass through the material being cut.

Abstract: A circular saw blade having an inner drive portion, an outer cutting edge portion, and a plurality of angled slots extending through the blade from the first lateral surface through to the second lateral surface of the blade. The angled slots are radially spaced inboard of the outer cutting edge portion and they are closed and thus do not open to the outer diameter of the saw blade. The angled slots serve to produce an audible signal in the event the saw blade is rotated in the wrong direction of rotation upon a drive unit.