Abstract: Methods and apparatus for making and using tools, for example concrete cutting blades. The tool includes a first layer and a second layer that are oppositely disposed. The first and second layers include working surfaces that support at least one working element when the working element is applied to a work piece. Additionally, an intermediate structure is included between the first and second layers. The intermediate structure can include a plurality of components extending in the area between the structural surfaces and the working surfaces.

Abstract: An interchangeable concrete cutting chain-saw cutting assembly (500) adapted for installation upon a drive assembly (112) in exchange for a removed, different type cutting head assembly. The chainsaw cutting assembly (500) includes a housing (703) that has fasteners that releasably attach the housing (703) to a drive assembly (112) in an installed configuration. A ratio transmission (525) has a plurality of interconnected rotatable members (533, 535), each rotatable member (533, 535) having a mounting shaft (641, 643) positioned at a fixed location on the housing (703) by a bearing assembly (640, 642). The driven member (533) has a receiver that interconnects with a driveshaft (372) of the drive assembly (112) in the installed configuration whereby the driven member (533) is rotated by the drive assembly (112). The cutting chain drive member (535) operatively interconnected with a drive sprocket (707) whereby rotation of the cutting chain drive member (535) rotates the drive sprocket (707).

Abstract: Methods and apparatus for making and using tools, for example concrete cutting blades. The tool includes a first layer and second layer that are oppositely disposed. The first and second layers include working surfaces that support at least one working element when the working element is applied to a work piece. Additionally, an intermediate structure is included between the first and second layers. The intermediate structure can include a plurality of components extending in the area between the structural surfaces and the working surfaces.

Abstract: Methods and apparatus for making and using tools, for example concrete cutting blades, may use laminations. They may also include inserts, such as structural inserts, damping inserts and fluid flow elements. Fluid flow elements may include a tube, a transition element including an inlet fitting, a fluid pressure containment structure inserted into the channel of the blade, an added material resistant to effects of the fluid including plastics, coatings and films, and other structures. Additional nozzle structures may be included. Methods and apparatus for making and using tools including concrete cutting blades having improved damping characteristics may include inserts, plugs and other structures, including those made from materials softer or more ductile than the tool material.

Abstract: A support assembly for a core drill which utilizes an improved high strength spoked reinforcer. The reinforcer may be removably mounted a core drill tube by fasteners. A drive connection is removably mounted and centrally located on an outer disc of a pair of discs. The drive connection is adapted to connect with a drive shaft to cause rotation of the tube. The assembly can also include a split in the disc when the high strength spoked reinforcer is not welded thereto, thereby providing a means of water control. The high strength spoked reinforcer can be a separate piece that is bolted to the disc or can be integrally formed as one piece therewith.

Abstract: A bolt on drive assembly for a core drill which utilizes an improved high strength spoked reinforcer mounted beneath a disc. The disc and high strength spoke reinforcer are removably mounted on the tube by bolt fasteners. A drive connection is removably mounted and centrally located on a outer disc of the pair of discs. The drive connection is adapted to connect with a drive shaft to cause rotation of the tube. The system can also include a split in the disc when the high strength spoked reinforcer is not welded thereto thereby providing a means of water control. The high strength spoked reinforcer can be a separate piece that is bolted to the disc or can be integrally formed as one piece therewith.

Abstract: A bolt on drive assembly for a core drill which utilizes an improved high strength spoked reinforcer mounted beneath a disc. The disc and high strength spoke reinforcer are removably mounted on the tube by bolt fasteners. A drive connection is removably mounted and centrally located on a outer disc of the pair of discs. The drive connection is adapted to connect with a drive shaft to cause rotation of the tube. The system can also include a split in the disc when the high strength spoked reinforcer is not welded thereto thereby providing a means of water control. The high strength spoked reinforcer can be a separate piece that is bolted to the disc or can be integrally formed as one piece therewith. An adapter is provided that allows for standard drilling that fits into a recess in the center hub and is removable to expose the recess for attachment to a specialized drill motor, such as an A-flange.

Abstract: Chain bar apparatus and methods are disclosed that may be formed from plastic, metal or other materials. Laser cutting of a chain bar core can provide improved structural characteristics, for example when adhesive is used to assemble the chain bar. Flow diversion elements can be used to optimize flow throughout the chain bar.

Abstract: A heat reducing slot that is part of a saw blade that includes tips that will house carbide or other tips that are to be attached through a torch or induction. Heat reducing slots repeat for each tip on the perimeter of a blade that will be treated with high heat. For each tip, there is a general area defined near the seat and groove of the tip. In this general area a slot is inserted that has the effect of reducing the amount of heat needed to be applied to the blade for the attachment of carbide or other tips.

Abstract: An improved slot for a circular saw blade that reduces thermal cracking that occurs during the use of the blade. The slot extends from the peripheral edge of the blade in a vertical direction toward the center of the blade. It has an initial channel that takes a slight curve as it extends toward the center of the blade, but remains in a substantially vertical orientation until it terminates in a curve that is convex when viewed from the peripheral edge toward the center hole. The curve extends in both directions away from the channel portion. The first curve extends at a length that is longer than the length of the second curve. The curve does not complete a circle, but resembles a circle that has had been snipped at one point and one side hangs down below the other. Each curve terminates in an aperture.

Abstract: Methods and apparatus for making and using tools, for example concrete cutting blades. The tool includes a first layer and second layer that are oppositely disposed. The first and second layers include working surfaces that support at least one working element when the working element is applied to a work piece. Additionally, an intermediate structure is included between the first and second layers. The intermediate structure can include a plurality of components extending in the area between the structural surfaces and the working surfaces.

Abstract: Drill stand (1) including a base plate (2), a carriage (3) arranged to be able to carry a drill motor and a drill column (4) which is pivotally mounted to a front part (5) of the base plate. The drill column is supported by a back support (7) located in a longitudinal direction rear of the drill column and is pivotally mounted to a back part (8) of the base plate, and a back side of the drill column facing the back support (7) is arranged as a track (10) having lateral wings (11, 11?), a right side wing (11) and a left side wing (11?). A clamping arrangement fastened to both of the back support and the track (10) enabling them to be fixed to each other in different positions along the track by clamping.

Abstract: An interchangeable concrete cutting chain-saw cutting assembly (500) adapted for installation upon a drive assembly (112) in exchange for a removed, different type cutting head assembly. The chainsaw cutting assembly (500) includes a housing (703) that has fasteners that releasably attach the housing (703) to a drive assembly (112) in an installed configuration. A ratio transmission (525) has a plurality of interconnected rotatable members (533, 535), each rotatable member (533, 535) having a mounting shaft (641, 643) positioned at a fixed location on the housing (703) by a bearing assembly (640, 642). The driven member (533) has a receiver that interconnects with a driveshaft (372) of the drive assembly (112) in the installed configuration whereby the driven member (533) is rotated by the drive assembly (112). The cutting chain drive member (535) operatively interconnected with a drive sprocket (707) whereby rotation of the cutting chain drive member (535) rotates the drive sprocket (707).

Abstract: Chain bar apparatus and methods are disclosed that may be formed from plastic, metal or other materials. Laser cutting of a chain bar core can provide improved structural characteristics, for example when adhesive is used to assemble the chain bar. Flow diversion elements can be used to optimize flow throughout the chain bar.

Abstract: Methods and apparatus for making and using tools, for example concrete cutting blades, may use laminations. They may also include inserts, such as structural inserts, damping inserts and fluid flow elements. Fluid flow elements may include a tube, a transition element including an inlet fitting, a fluid pressure containment structure inserted into the channel of the blade, an added material resistant to effects of the fluid including plastics, coatings and films, and other structures. Additional nozzle structures may be included. Methods and apparatus for making and using tools including concrete cutting blades having improved damping characteristics may include inserts, plugs and other structures, including those made from materials softer or more ductile than the tool material.

Abstract: Methods and apparatus for making and using tools, for example concrete cutting blades, may include fluid flow elements within a channel of the blade. Fluid flow elements may include a tube, a transition element including an inlet fitting, a fluid pressure containment structure inserted into the channel of the blade, an added material resistant to effects of the fluid including plastics, coatings and films, and other structures. Additional nozzle structures may be included. Methods and apparatus for making and using tools including concrete cutting blades having improved damping characteristics may include inserts, plugs and other structures, including those made from materials softer or more ductile than the tool material.

Abstract: A bolt on drive assembly for a core drill which utilizes an improved high strength spoked reinforcer mounted beneath a disc. The disc and high strength spoke reinforcer are removably mounted on the tube by bolt fasteners. A drive connection is removably mounted and centrally located on a outer disc of the pair of discs. The drive connection is adapted to connect with a drive shaft to cause rotation of the tube. The system can also include a split in the disc when the high strength spoked reinforcer is not welded thereto thereby providing a means of water control. The high strength spoked reinforcer can be a separate piece that is bolted to the disc or can be integrally formed as one piece therewith.

Abstract: Methods and apparatus for making and using tools, for example concrete cutting blades, may use laminations. They may also include inserts, such as structural inserts, damping inserts and fluid flow elements. Fluid flow elements may include a tube, a transition element including an inlet fitting, a fluid pressure containment structure inserted into the channel of the blade, an added material resistant to effects of the fluid including plastics, coatings and films, and other structures. Additional nozzle structures may be included. Methods and apparatus for making and using tools including concrete cutting blades having improved damping characteristics may include inserts, plugs and other structures, including those made from materials softer or more ductile than the tool material.