Abstract: A manual sharpener includes at least one pre-sharpening stage having interdigitating comb-like abrasive sharpening structure. The sharpener also includes a finishing stage having a pair of abrasive surfaced truncated conical disks as its sharpening structure. The disks are mounted on a rotatable shaft with the small ends of the disks in contact with each other.

Abstract: A waterjet system in accordance with a particular embodiment includes a pressurizing device configured to pressurize a fluid, a cutting head downstream from the pressurizing device, and a catcher positioned to collect a jet from the cutting head. The system can further include a treatment assembly configured to treat a feed fluid to the pressurizing device and/or a byproduct fluid from the catcher, such as by removing submicron colloidal particles from the feed fluid and/or from the byproduct fluid. For example, the treatment assembly can include a coagulation unit, such as a chemical coagulation unit or an electrocoagulation unit, configured to coagulate the submicron colloidal particles. The pressurizing device, the cutting head, and the treatment assembly can be at different respective portions of a fluid-recycling loop.

Abstract: The invention relates to an apparatus for producing CO2 pellets from CO2 snow, in particular, for a cleaning device for spraying surfaces to be treated with a mixed stream of a pressurized gas and CO2 pellets, includes a compressor device for compressing CO2 snow to form CO2 pellets. The compressor device includes a gear compressor. The gear compressor includes at least one compressor wheel which is mounted rotatable about a first rotation axis and has a plurality of compressing elements, and includes at least one intake wheel which has a plurality of snow intakes for accepting CO2 snow. The snow intakes are configured corresponding to the compressing elements. The intake wheel is mounted rotatable about a second rotation axis and cooperates with the at least one compressor wheel. The intake wheel includes an intake wheel sleeve with an intake wheel sleeve wall.

Abstract: Shape memory alloys (SMAs) may be used for static rock splitting. The SMAs may be used as high-energy multifunctional materials, which have a unique ability to recover large deformations and generate high stresses in response to thermal loads.

Abstract: A tile or masonry saw assembly may include a saw and a frame. The saw includes a motor operable to turn a blade of a blade assembly to cut a workpiece. The blade assembly is internally wetted during operation by nozzles disposed on opposing sides of the blade to provide water onto the blade within a blade guard configured to shield a portion of the blade. The frame is operably coupled to the saw to support the workpiece. The frame supports a water collecting system for collecting the water. The water collecting system includes a water tank that is removable from the frame.

Abstract: Provided are abrasive articles in which the make layer, abrasive particle layer, and size layer are coated onto a backing according to a coating pattern characterized by a plurality of discrete islands. The coating pattern has features in which all three components are generally in registration with each other, while providing a pervasive uncoated area extending across the backing. Advantageously, this configuration provides a coated abrasive that displays superior curl-resistance compared with previously disclosed abrasive articles. Moreover, this configuration resists loading, resists de-lamination, has enhanced flexibility, and decreases the quantity of raw materials required to achieve the same level of performance as conventional abrasive articles.

Abstract: A hand power tool includes a drive unit, an electronic unit, and a cooling device configured to cool at least one of the drive unit and the electronic unit. The hand power tool also includes at least one of an open-loop control unit and a closed-loop control unit configured to control the cooling device.

Abstract: A grinding machine of one embodiment includes an abrasive wheel; a rectangular base including a top wall having a central through hole and an upper shoulder; a mounting member secured to the central through hole; an electric motor including a drive shaft passing through the mounting member to secure to the abrasive wheel; first and third workpiece holding units each including a board secured to the base; an adjustment knob on the board; and an L-shaped seat secured to the board and having a transverse channel, a front curved slot, a rear projection pivotably secured to the board, and a pin secured to the board and disposed in the slot; a second workpiece holding unit secured to the shoulder and including a vertical tunnel; and a fourth workpiece holding unit secured to the shoulder and including a vertical tunnel, an adjustment knob, and a fastening member.

Abstract: An adjustable surface treatment device which comprises a hollow elongate main body and an adjustable discharge nozzle being supported adjacent a free end of the main body. The adjustable discharge nozzle is coupled to a blasting media supply conduit for supplying blasting media thereto. An articulating mechanism is coupled to the adjustable discharge nozzle for adjusting a position of the adjustable discharge nozzle relative to the main body. method and system for positioning a tool in a desired orientation relative to a surface to be treated is also disclosed.

Abstract: The present invention provides an apparatus for treating the surface of a radome, comprising: a rotary driving unit; a vacuum suction unit; a vertical driving unit; and a surface treatment unit. The rotary driving unit comprises: a rotary shaft; and a driving motor, installed at a predetermined portion spaced apart from the rotary shaft. The vacuum suction unit comprises: a plurality of first hydraulic cylinders positioned on the rotary shaft in the circumferential direction; and a suction plate equipped at an end of a piston rod of each of the first hydraulic cylinders. The vertical driving unit comprises: a mounting plate having a hole formed in the central portion thereof. The surface treatment unit comprises: a support column vertically installed on a predetermined portion spaced apart from the mounting plate; and a support arm.

Abstract: A wall saw comprising:—a carriage (2);—a saw arm (11) pivotally mounted to the carriage;—a rotatable spindle (10) rotatably mounted to the saw arm and configured for connection to a saw blade; and—an electric drive motor (13) for rotating the spindle. The rotor (36) of the drive motor comprises a rotor hub (66) which is operatively connected to the output shaft (14) of the drive motor through a safety clutch (67) so as to allow torque to be transmitted from the rotor hub to the output shaft via the safety clutch, the safety clutch being configured to allow mutual rotation between the rotor hub (66) and the output shaft (14) when said torque reaches a given threshold value. The safety clutch (67) is accommodated in a space inside the rotor hub (66).

Abstract: The invention relates to obtaining an abrasive product comprising a surface with multiple abrasive zones supported by a backing layer. The abrasive zone are surrounded by interconnected channel portions comprising first channel portions with a first transverse dimension td1 and second channel portions with a second transverse dimension td2 larger than the first transverse dimension td1.

Abstract: A polishing composition of the present invention contains abrasive grains each having a surface with protrusions. Parts of the abrasive grains have larger particle diameters than the volume-based average particle diameter of the abrasive grains, and the average of values respectively obtained by dividing a height of each protrusion on the surface of each abrasive grain belonging to the parts of the abrasive grains by the width of a base portion of the same protrusion is 0.170 or more. Protrusions on the surfaces of abrasive grains belonging to the parts of the abrasive grains that have larger particle diameters than the volume-based average particle diameter of the abrasive grains have an average height of 3.5 nm or more. The polishing composition has a content of an organic alkali of 100 mmol or less per kilogram of the abrasive grains in the polishing composition.

Abstract: A cutting machine includes a circular knife and a grinding unit for grinding the circular knife, wherein the grinding unit can be adjusted to grind the circular knife at different angles.

Abstract: A system for grinding solid workpieces includes a grinding wheel, a bearing for rotatable mounting of the grinding wheel about an axis of rotation, and a grinding wheel drive for rotating the grinding wheel. The system allows the production of freely-definable surfaces on the face of the rigid workpiece that comes into contact with the grinding wheel. The bearing is fastened to a pivotable and displaceable bearing carrier. The bearing plane is pivotable in any desired direction with respect to an initial plane and is displaceable in a direction perpendicular to the initial plane. Actuators are coupled to the bearing carrier to pivot and displace the bearing carrier. A digital control unit controls and synchronizes the actuators such that the surface of the grinding wheel creates a freely-definable face about a positionally fixed reference point which is at a radial distance from the center point of the grinding wheel.

Abstract: Rotary tools configured to sand components and accommodate complex geometries thereof are provided. The rotary tools may include a rotary head and a shaft. Bristles and an abrasive material may be coupled to the abrasive material. The rotary tools may additionally include outlets configured to receive a flow of coolant to cool the rotary tool. A system configured to convert a flood coolant system to a through spindle coolant system is also provided. The system may include a hollow shaft with inlets and a redirector therein. A flow receptor may include scoops that receive coolant sprayed from a flood coolant system and direct the coolant through the inlets in the hollow shaft. Thereby, the coolant may contact the redirector and be directed downward through the hollow shaft to a rotary tool, such as the rotary tool described above.

Abstract: Provided is a polishing composition, which comprises abrasive grains, a water-soluble polymer, an aggregation inhibitor and water. The ratio R1/R2 is 1.3 or less, where R1 represents the average particle diameter of the particles present in the polishing composition and R2 represents the average particle diameter of the abrasive grains when the abrasive grains are dispersed in water at the same concentration as that of the abrasive grains in the polishing composition. The polishing composition can be used mainly for polishing the surface of a silicon substrate.

Abstract: A superfinishing machine and a superfinishing method which can perform axially uniform finishing on a logarithmically crowned surface formed on an inner peripheral surface of an annular member in a short time, and an outer ring of a bearing having a raceway surface superfinished by the superfinishing method, are provided. A superfinishing machine 1 includes a linearly reciprocating mechanism 40 configured to linearly reciprocate a grinding stone 3 held by a pressing section 30, along a plane B touching a generatrix of the logarithmically crowned surface, and in a direction C inclined by a given angle ? with respect to a center axis O of an outer ring 10.

Abstract: A system for grinding workpieces includes a grinding wheel, a first support for rotatably supporting the grinding wheel about a first rotational axis, and a grinding wheel drive for rotating the grinding wheel. The first support can be rotated about a second rotational axis using a support rotating device, the first rotational axis being inclined relative to the second rotational axis such that the grinding wheel lies diagonally against the surface of the workpiece and grinds a substantially conical surface on the workpiece while rotating about the second rotational axis when the workpiece contacts the grinding wheel surface at a distance from the second rotational axis. A position adjusting device may move the first support along the second rotational axis. The angle of inclination between the first rotational axis and the second rotational axis may be adjusted using an inclination adjusting device.

Abstract: A method for simultaneously cutting a multiplicity of slices from a cylindrical workpiece, along strictly convex cutting faces, by supplying a suspension of hard substances in a carrier liquid, as cutting medium, to wire portions, while the wire portions, having a longitudinal tension, define a relative motion to the workpiece as a result of wire guide roller rotation with continual alternation between a first direction of rotation and a second direction of rotation, which is opposite to the first direction of rotation, wherein, during the rotation in the first direction, the wire is moved a first length, and during the rotation in the second direction, the wire is moved a second length, and the second length is shorter than the first, and at the cutting operation start a first longitudinal wire tension is greater than a second longitudinal tension at the end.