42results about How to "Increase the cutting width" patented technology

A downhole filter comprises a tubular member having a wall defining a plurality of openings. The openings have an outer width less than an inner width. The parts of the opening defining the smaller width are defined by radially outer parts of the openings, such that particulates or sand prevented from passing through the openings will tend to be retained to the outside of the tubular member. A method comprises providing a tubular string having a non-porous tubular portion and a porous tubular portion, and installing the tubular string within a wellbore such that the porous tubular portion is located adjacent a fluid-producing formation within the wellbore. In another embodiment, an apparatus comprises a drill string comprising a non-porous tubular portion and a porous tubular portion, and an earth removal member operatively connected to a lower end of the drill string.

A shift mechanism for trim mower cutting units includes a pair of slidable carriers. Each slidable carrier can slide along a pair of guide rods mounted to a mower frame. A hydraulic extension cylinder is connected to each slidable carrier and independently extends to move the slidable carrier laterally outward from the mower frame or retracts to move the slidable carrier laterally inward in relation to the mower frame. A hydraulic shifting cylinder is mounted between the two extension cylinders and extends to shift both slidable carriers laterally inward toward a center position, and retracts to move both slidable carriers laterally outward toward an extended position.

An improved concrete cutter has a longitudinally-extending primary boom and one or more saw carriage sub-assemblies that move along the length of the boom. “Wing-like” boom extensions are hingedly secured at each end of the primary boom. The boom extensions can be easily positioned at each end of the primary boom to extend the cutting width of the concrete cutter and without requiring removal of the boom extensions from the concrete cutter. The saw carriage sub-assemblies are independently movable along the boom extensions. Carriage spacing is variably-adjustable along the boom such that each saw carriage can move toward or away from the other saw carriage. Each saw carriage sub-assembly is height-variable and is self-adjusting to contours in the profile of the concrete surface being cut.

An abrasive apparatus of a sander is provided. The abrasive apparatus is disposed above a worktable of the sander and includes a base and a lift unit. At least one abrasive wheel is provided in the base. The base has a top formed with at least one slot. The lift unit is disposed on the abrasive wheel to bring the abrasive wheel to move up so that an abrasive surface of the abrasive wheel passes through the slot of the base and protrudes from the base for the top of the base to sand the side of a workpiece. The cutting width of the sander can be extended to enhance the use of the sander, so the manufacturing process can be shortened to increase the production efficiency.

The invention discloses a terpolymer composite petroleum pour point depressant and a method for preparing the same, wherein the pour point depressant is formed by the random copolymerization of maleic anhydride monomer, 2-methacrylate and carboxylic acid ethylene ester, and the weight average molecular weight is between 10, 000 and 90, 000g / mol. The invention also discloses a terpolymer compositepetroleum pour point depressant composite which consists of the following components in weight percentage: 55 t0 92 percent of the terpolymer composite petroleum pour point depressant and 8 to 45 percent of surfactant. The pour point depressant and the pour point depressant composite have the advantages of obviously improving the low-temperature rheological property of crude oil, improving the quality and efficiency of operations such as crude oil exploitation, collection-transfer, storage and the like, widening the cutting width of fraction during the crude oil refining and lowering the energy consumption of pipe transportation.

A pneumatic tire including a closed sipe in a land portion formed in a tread surface, provided with at least three cuts extending in a radiation direction from an imaginary axis that extends in a depth direction of the land portion, and that terminate in the land portion. A widened portion where a width of a cut is locally increased is formed at at least one position of an intermediate region from the imaginary axis to a terminating portion of the cuts.

The invention provides a high-speed vacuum coating online cutting device, which belongs to the technical field of coating processing. The high-speed vacuum coating online cutting device solves the problem that the prior cutter has poor cooling effect when cutting coated films and sheets. The high-speed vacuum coating online cutting device comprises a rotating shaft, a tool rest and a power mechanism connected with the rotating shaft, wherein the tool rest is fixedly arranged on the rotating shaft, the outer end part of the tool rest is provided with a cutting blade, the power mechanism drivesthe rotating shaft to rotate radially so as to control the cut-in of the cutting blade, the tool rest is made from a heat conduction material and is internally provided with a cooling passage, the rotating shaft is provided with a cooling device for providing cooling liquid, and two ends of the cooling passage are connected with the cooling device through a cooling pipe so as to form a closed circulation path. The cutting device is provided with a cooling structure to cool the cutting blade, and the cooling effect is good so that the service life of the cutting blade is prolonged. Simultaneously, a cutting blade adjusting device is arranged on the cutting device for adjusting the position of the cutting blade so as to adjust the cutting width of the films or the sheets.

The invention provides a split-type reciprocating cutter, which comprises a sawtooth shaft, a slide rail, a side, sawtooth, a sawtooth screw, a knife holder, a knife holder shaft, a knife holder screw and a cutting knife. Both the sawtooth shaft and the slide rail are fixed and installed on the side with nuts; several of the sawtooths are arranged neatly on the sawtooth shaft and fastened by sawtooth screws; several of the knife holders are neatly arranged on the knife on the frame shaft, fastened by serrated screws, and can slide freely on the slide rail; the cutting knife is installed on the knife frame; The knife reciprocates along the slide rail. Both the sawtooth and the knife rest of the present invention are split, can be processed and produced separately, and the gap between the sawtooth and the knife rest can be adjusted arbitrarily as required.