Abstract: A corrugated fin heat pipe and method of fabrication. The micro channel heat pipe includes a tubular housing split longitudinally into two halves. A pair of corrugated fin elements defining a plurality of adjacent closed and open micro capillary channels are attached to the inner surface of the housing halves. Material is removed from the closed micro capillary channels along a portion of the longitudinal axis to create regions consisting entirely of open micro capillary channels, maximizing heat flux in those regions. The housing halves are reattached and the heat pipe housing is enclosed by a pair of end caps.

Abstract: A method for making a nozzle plate for an inkjet printer by laser ablating a nozzle plate material. The method includes the steps of a) determining a plurality of desired nozzle hole locations, b) ablating the area of the nozzle plate material surrounding the desired locations of the holes to a predetermined depth to provide a plurality of flow paths c) ablating a nozzle through the full thickness of the nozzle plate material at each desired nozzle hole location, wherein unablated material surrounds each nozzle hole to provide a chamber, and d) ablating a throat region through a portion of the unablated material surrounding each nozzle hole so that each chamber is in flow communication with at least one flow path outside of the chamber.

Abstract: A device for fastening a roll to the frame construction in a paper machine, paper finishing machine, or equivalent, wherein the ends of the roll are provided with bearings. The bearing housings of the bearings, or fastening bases formed onto the bearing housings, are mounted against a back-up face formed on the frame construction so as to position the roll in its place on the machine frame. On the machine frame, fastening members are arranged to be displaceable in a direction substantially perpendicular to and against the back-up face formed on the frame construction and include flange portions, i.e., shoulders or equivalent formed pieces. Correspondingly, the bearing housings, or fastening bases arranged thereon, are provided with grooves corresponding to the shape of the flange portions of the fastening members. When the roll is installed in its place, the flange portions pass into the grooves in the bearing housings.

Abstract: A method whereby one or more occluders are inserted in the housing of a prosthetic heart valve by compressing the housing of the prosthetic heart valve at four discrete locations, thereby causing the housing to deform sufficiently for insertion of occluders between diametrically opposed pivot supports on the inner surface of the housing. The appropriate locations for application of the compressive forces are identified. Compression force is then applied using either pin blocks or v-shaped blocks. One or more occluders are inserted in the pivot supports. The compressive forces are released, allowing the housing to return to its unstressed generally annular shape and securing the occluders in the housing.

Abstract: An insulating roll is provided which is constructed with a roll body formed of a plurality of inorganic material-derived discs laminated with each other and positioned axially of and around a metal conduit, and a heat-resistant metal tube disposed integrally over an outer periphery of the roll body. A tubular cover formed by spray coating a ceramic material on the heat-resistant metal tube, or a sleeve made of sintered ceramic material may be disposed, where desired, in place of the heat-resistant metal tube. This roll has low thermal conductivity and high impact strength without involving feduction of the surface temperature of a material being heat treated in a furnace, or reduced ambient temperature in the furnace during heat treatment.

Abstract: A hermetic compressor assembly having a housing having disposed therein an electric motor including a stator and a rotor drivingly attached to a crankshaft having an eccentric portion, and a compression mechanism operatively coupled to the crankshaft eccentric portion. A counterweight is attached to the crankshaft and is made of progressively stamped metal stock material having selectively varying widths between first and second side edges thereof. The counterweight has one of a plurality of weights, each individual weight directly corresponding to a different stock material width. Also, a method for manufacturing compressors having installed therein counterweights of different weights and having substantially identical axial projection profiles, wherein the counterweights are made by a method which includes providing a progressive stamping die, and planar metal stock material having one of a plurality of different widths between first and second opposite side edges.

Abstract: A relatively simple, effort-saving and cost-saving arrangement and a corresponding method for repair and/or maintenance work in the inner casing of a multishell turbomachine is provided. To this end, after a tool carrier is put into the outer casing of a turbinemachine, the connecting elements of top part and bottom part of the inner casing are slackened. The top part of the inner casing is then lifted in the outer casing to such an extent that the tool carrier can reach into the inner casing. To this end, at least one locating fixture for a lifting device is arranged on the top part. A radial distance is formed between the at least one outer casing and the inner casing, the radial distance corresponding to at least the radial extent of a tool carrier to be introduced into the inner casing.

Abstract: A roller device has a bearing axle and a wheel rotatably mounted to the axle in a roller housing. A lifting device is connected to the axle and wheel and is movable to raise and lower the wheel out of and into a travelling plane. A supporting device is fitted to the lifting device and has a support area lowered onto the travelling plane in response to rotation of the lifting device. The lifting device comprises a pair of eccentric discs which are mounted at both ends of the bearing axle and are connected thereto in a rotationally fixed manner. One of the discs engages in a form locking manner a corresponding recess in a side plate of the supporting device and at least one of the discs has two spaced apart spiked surfaces which can be rotated with the disc about the bearing axle in opposite directions against a stop protrusion on the side plate to thereby raise and lower the wheel.

Abstract: A fabrication method for an improved structure practical forged one-piece flange-type ball valve that consists of the forging the initial two blanks of the water inlet seat and the ball valve seat for a one-piece flange-type ball valve, based on the blueprints of conventional one-piece flange-type ball valves, with the water inlet seat having a left pipeline connection section already formed inside and the ball valve seat having a ball valve chamber, its contiguous water outlet port, and a right pipeline connection section already formed inside. To facilitate easier finishing, a shallower mating section is formed at the front end of the water inlet seat for contact with the ball valve chamber of the ball valve seat. A left water-tight gasket containment recess is then lathed in the mating section end surface of the water inlet seat and external threads are died along the outer sides of the mating section.

Abstract: A system for embossing a substantially continuous web of material including a supply for supplying at least one substantially continuous web of material, feeding the substantially continuous web of material, an embossing device for embossing a predetermined pattern in the web material and a take-up device for taking-up the embossed web material; wherein at least one roll of the system includes an elongated core formed of a substantially rigid material and an elongated sleeve formed of a material less rigid than the elongated core with the elongated sleeve being releasably secured to the core such that the elongated sleeve is axially and circumferentially fixed with respect to the core when in operation and can be selectively axially removed from the core. Preferably, the sleeve includes an embossing pattern laser engraved thereon so as to permit the embossing pattern being run by the system to be readily changed.

Abstract: A method and apparatus for manufacturing wing spars includes a fixture that holds spar webs for drilling and edge trimming by accurate numerically controlled machine tools using original numerical part definition records, utilizing spatial relationships between key features of detail parts or subassemblies as represented by coordination features machined into the parts and subassemblies, thereby making the parts and subassemblies intrinsically determinant of the dimensions and contour of the wing.

Abstract: A press roll for a paper or board machine, a method for manufacturing a roll for a paper or board machine and a coating composition for a roll which enable the roll to endure difficult corrosion conditions. An adhesion/corrosion-protection layer having a thickness of from about 150 &mgr;m to about 300 &mgr;m is applied onto the frame part of the roll by a high-velocity flame spraying technique. The adhesion/corrosion-protection layer contains a nickel-chromium alloy. A tight-ceramic layer having a thickness from about 50 &mgr;m to about 150 &mgr;m is applied onto the adhesion/corrosion-protection layer by a high-velocity flame spraying technique and includes from about 50% to about 100% of Al2O3 and optionally includes up to about 50% of TiO2 and/or any amount of Al2TiO5. A porous ceramic layer is applied onto the tight ceramic layer. The tight-ceramic layer may include only Al2TiO5 instead of Al2O3, with or without TiO2.

Abstract: A method of repairing a crack in a boiling water reactor shroud with a clamp having pins eccentrically mounted on disks connected by a structural member includes inserting the pins into openings formed in the shroud on opposite sides of the weld and turning the disks to rotate the pins toward the weld such that edges of the holes are engaged by the pins to transmit loads from the shroud to the structural member rather than the weld. A locking mechanism using set screws can be used to lock the disks in a desired rotational position relative to the clamp.

Abstract: An aluminum alloy sheet, plate, casting or extrusion having a surface layer containing magnesium oxide and aluminum oxide is cleaned with an acidic solution. The cleaned component has an aluminum oxide layer that is pretreated with a phosphorus-containing organic acid to form a functionalized layer. A layer of polymeric adhesive is applied to the functionalized layer, and the adhesive layer is joined to a metal support structure to form a vehicle assembly.

Abstract: A method of making a novel brachytherapy device is disclosed. The device is formed from a hollow-tube-shaped seed-substrate, allowing the easy association of the device with suture material. This shape minimizes the chance of migration of implanted seeds due to better attachment to tissue. The distribution of the radioactive material on the exterior surface of an interior tube of the tubular device provides a relatively uniform radiation field around the hollow-tube-shaped brachytherapy seed source. Methods are disclosed of making brachytherapy devices that are inherently radioactive. Also disclosed are methods of making devices that can be rendered radioactive by the transmuting effects of neutron irradiation. Brachytherapy devices are disclosed that facilitate medical application and improve safety for patients and medical personnel.

Abstract: A process for manufacturing an upper work roller for use in the deep rolling of crankshafts includes the steps of: rough sawing tool steel to form a generally cylindrical wafer, heat treating the wafer to provide it with a desired hardness, grinding of the wafer to desired dimensions to form a properly dimensioned heat treated blank wafer, a second grinding of the wafer to form a finished shape of work roller, and vibratory finishing the roller to achieve a desired microfinish thereon.

Abstract: Circular recuperators are used to increase the efficiency of gas turbine engines. The present circular recuperators is made of a plurality of cells. Each of the plurality of cells includes a plurality of components, such as, a plurality of sheets, a plurality of bars and guide strips. To more efficiently utilize the configuration of a primary surface circular heat exchanger or recuperator, the plurality of cells are manufactured to have a involute configuration. A fixture is used to position, hold and form the involute configuration. The fixture includes clamping device which positions and holds a base edge and the plurality of bars in a preestablished position and a forming member forms the remainder of the individual cells into the involute configuration. Corresponding ones of the base edges of individual cells form an inner diameter of the recuperator.

Abstract: A method of making piston rings includes the following steps: forming a base body on a mandrel by thermally spraying a metal on the mandrel; applying a low-friction coating to the base body; removing the base body from the mandrel; and cutting rings from the base body.

Abstract: A burnisher for use with a lathe or production machine to burnish opposing thrust faces of a crankshaft laterally fixed and rotatably driven thereby. The tool of the burnisher has a plurality of opposing burnishing rollers that operatively engage under opposing torsional load thrust faces of the crankshaft rotatably driven by the lathe or production machine. The burnisher features biasing spring construction that provides for the movement of the burnishing tool laterally into a centered working position relative to the opposing surfaces of the crankshaft when sufficient turning force or torque is applied to the burnishing tool. This construction provides for even application of burnishing force by the burnishing rollers onto the thrust faces for application in which the workpiece is fixed laterally without becoming distorted.

Abstract: Methods for manufacturing a water hammer arrester having an endurance against pressure of a fluid as well as excellent productivity. There is provided Methods for manufacturing a water hammer arrester comprising steps of: deforming plastically an end of a work piece for a housing to close it by pressing the end toward a center thereof while the work piece is rotated at high speed, the work piece is a brass pipe having predetermined length; forming a housing by cutting a closed part in prescribed thickness; filling up a gas and inserting a piston within the housing to prevent the gas from leaking; forming a connecting part having smaller diameter than the housing by pressing an outside of an open end of the housing provided with poured gas and the piston; and mounting a connector to the connecting part.