Abstract: Helical groove fasteners and methods for producing the same are provided for use in systems requiring fluid passage through the fastener. In one embodiment, the fastener includes a shank, a head, a threaded portion, and at least one groove extending through at least a portion of the threaded portion. The fastener can include a single groove or multiple grooves. In certain preferred embodiments, the helix rotation angle of the groove is selected so that the shank has a continuous diameter to facilitate the thread forming process. In preferred embodiments, the fastener is cold forged and the threads are formed using a thread rolling die.

Abstract: Helical groove fasteners and methods for producing the same are provided for use in systems requiring fluid passage through the fastener. In one embodiment, the fastener includes a shank, a head, a threaded portion, and at least one groove extending through at least a portion of the threaded portion. The fastener can include a single groove or multiple grooves. In certain preferred embodiments, the helix rotation angle of the groove is selected so that the shank has a continuous diameter to facilitate the thread forming process. In preferred embodiments, the fastener is cold forged and the threads are formed using a thread rolling die.

Abstract: A simplified method for producing internally threaded blind fasteners includes cold forming of the thin deformable walls of the fastener into bowed out sections by reverse extrusion to form deep grooves, and subsequent further cold forming to increase the diameter of this thin walled portion of the fastener to form it into bowed out sections. Three or more or even five or more sections may be formed, to increase the “pull-out” resistance by increasing the “footprint” of the deformed sections of the blind fastener.

Abstract: A quick release drive assembly intercouples a reversible hand held motor and a drive screw for mounting blind fasteners in place. A replaceable adaption assembly includes the drive screw, the nosepiece of the unit and a drive adaptor for supplying torque from the motor to the drive screw. An outer housing is coupled to the nosepiece by three ball bearings which extend into a peripheral groove in the nosepiece, and which are held in place by a locking zone of reduced inner diameter in a quick release sleeve. The quick release sleeve has an adjacent release zone of increased inner diameter, into which the ball bearings may shift. A locking spring biases the quick release sleeve to its locked position. An eject spring is operative when the quick release sleeve is shifted to its released position, to eject the adaption assembly.

Abstract: A quick release drive assembly intercouples a reversible hand held motor and a drive screw for mounting blind fasteners in place. A replaceable adaption assembly includes the drive screw, the nosepiece of the unit and a drive adaptor for supplying torque from the motor to the drive screw. An outer housing is coupled to the nosepiece by three ball bearings which extend into a peripheral groove in the nosepiece, and which are held in place by a locking zone of reduced inner diameter in a quick release sleeve. The quick release sleeve has an adjacent release zone of increased inner diameter, into which the ball bearings may shift. A locking spring biases the quick release sleeve to its locked position. An eject spring is operative when the quick release sleeve is shifted to its released position, to eject the adaption assembly.

Abstract: A simplified method for producing internally threaded blind fasteners includes cold forming of the thin deformable walls of the fastener into bowed out sections by reverse extrusion to form deep grooves, and subsequent further cold forming to increase the diameter of this thin walled portion of the fastener to form it into bowed out sections. Three or more or even five or more sections may be formed, to increase the “pull-out” resistance by increasing the “footprint” of the deformed sections of the blind fastener.

Abstract: An enhanced fatigue nut for mating with a threaded mating component includes an exterior surface, a flanged mating end for insertion of a threaded mating component and an end opposing the flanged mating end. Disposed on the interior of the fastener may be a plurality of threads running from the flanged mating end toward the opposing end. The flanged mating end may have a load distributing profile that reduces a limiting stress on the threads of the mating component when the mating component is mated with the enhanced fatigue nut. The flanged mating end may have an end surface, a portion of which is disposed at an angular relationship with a line that is disposed perpendicular with a line that is disposed through the center of the interior of the enhanced fatigue nut.

Abstract: This invention relates to nickel-cobalt based alloys comprising the following elements in percent by weight: from about 0.002 to about 0.07 percent carbon, from about 0 to about 0.04 percent boron, from about 0 to about 2.5 percent columbium, from about 12 to about 19 percent chromium, from about 0 to about 6 percent molybdenum, from about 20 to about 35 percent cobalt, from about 0 to about 5 percent aluminum, from about 0 to about 5 percent titanium, from about 0 to about 6 percent tantalum, from about 0 to about 6 percent tungsten, from about 0 to about 2.5 percent vanadium, from about 0 to about 0.06 percent zirconium, and the balance nickel plus incidental impurities, the alloys having a phasial stability number N.sub.v3B less than about 2.60. Furthermore, the alloys have at least one element selected from the group consisting of aluminum, titanium, columbium, tantalum and vanadium. Also, the alloys have at least one element selected from the group consisting of tantalum and tungsten.

Abstract: This invention relates to nickel-cobalt based alloys comprising the following elements in percent by weight: from about 0.002 to about 0.07 percent carbon, from about 0 to about 0.04 percent boron, from about 0 to about 2.5 percent columbium, from about 12 to about 19 percent chromium, from about 0 to about 6 percent molybdenum, from about 20 to about 35 percent cobalt, from about 0 to about 5 percent aluminum, from about 0 to about 5 percent titanium, from about 0 to about 6 percent tantalum, from about 0 to about 6 percent tungsten, from about 0 to about 2.5 percent vanadium, from about 0 to about 0.06 percent zirconium, and the balance nickel plus incidental impurities, the alloys having a phasial stability number N.sub.v3B less than about 2.60. Furthermore, the alloys have at least one element selected from the group consisting of aluminum, titanium, columbium, tantalum and vanadium. Also, the alloys have at least one element selected from the group consisting of tantalum and tungsten.

Abstract: This invention relates to a hot corrosion resistant nickel-based superalloy comprising the following elements in percent by weight: from about 11.5 to about 13.5 percent chromium, from about 5.5 to about 8.5 percent cobalt, from about 0.40 to about 0.55 percent molybdenum, from about 4.5 to about 5.5 percent tungsten, from about 4.5 to about 5.8 percent tantalum, from about 0.05 to about 0.25 percent columbium, from about 3.4 to about 3.8 percent aluminum, from about 4.0 to about 4.4 percent titanium, from about 0.01 to about 0.06 percent hafnium, and the balance nickel plus incidental impurities, the superalloy having a phasial stability number N.sub.V3B less than about 2.45. Single crystal articles can be suitably made from the superalloy of this invention. The article can be a component for a gas turbine engine and, more particularly, the component can be a gas turbine blade or gas turbine vane.

Abstract: This invention relates to nickel-cobalt based alloys comprising the following elements in percent by weight: from about 0.002 to about 0.07 percent carbon, from about 0 to about 0.04 percent boron, from about 0 to about 2.5 percent columbium, from about 12 to about 19 percent chromium, from about 0 to about 6 percent molybdenum, from about 20 to about 35 percent cobalt, from about 0 to about 5 percent aluminum, from about 0 to about 5 percent titanium, from about 0 to about 6 percent tantalum, from about 0 to about 6 percent tungsten, from about 0 to about 2.5 percent vanadium, from about 0 to about 0.06 percent zirconium, and the balance nickel plus incidental impurities, the alloys having a phasial stability number N.sub.v3B less than about 2.60. Furthermore, the alloys have at least one element selected from the group consisting of aluminum, titanium, columbium, tantalum and vanadium. Also, the alloys have at least one element selected from the group consisting of tantalum and tungsten.

Abstract: This invention relates to a process for producing a non-pyrophoric, corrosion resistant rare earth-containing material capable of being formed into a polymer bonded permanent magnet comprising forming particles from a rare earth-containing alloy, and treating the alloy with a passivating gas comprised of nitrogen, carbon dioxide or a combination of nitrogen and carbon dioxide at a temperature below the phase transformation temperature of the alloy, and heat treating the alloy to produce material having a coercivity of at least 1,000 Oersteds. Rare earth-containing alloys suitable for use in producing magnets, such as Nd--Fe--B and Sm--Co alloys, can be used. If nitrogen is used as the passivating gas, the resultant powder particles have a nitrogen surface concentration of from about 0.4 to about 26.8 atomic percent. Moreover, if carbon dioxide is used as the passivating gas, the resultant powder particles have a carbon surface concentration of from about 0.02 to about 15 atomic percent.

Abstract: Methods for preparing magnetic strips are provided in which the strips are manufactured to a thickness of less than about 0.005 inches and are made of a ferrous alloy having a carbon content of from about 0.4 to about 1.2 weight percent. The strips are prepared by first manufacturing an alloy having a carbon content below about 0.5 weight percent to the desired thickness and then subjecting the strip to a carburizing step to raise the carbon content in the strip.

Abstract: Novel permanent magnets of Sm.sub.2 Co.sub.17 type crystal structure are provided herein. The magnets preferably have samarium, cobalt, iron, copper and zirconium in specified amounts. They have superior magnetic properties, including maximum energy product, intrinsic coercivity and second quadrant loop squareness. The compositions of the magnets can be expressed by a general formula [Co.sub.a Fe.sub.b Cu.sub.c Zr.sub.d ].sub.e Sm. Preferred embodiments, wherein a is about 0.6 to about 0.7, b is about 0.2 to about 0.3, c is about 0.06 to about 0.07, d is about 0.02 to about 0.03, and e is about 7.2 to about 7.4, have unexpectedly high maximum energy product, high intrinsic coercive force and squareness. Processes for producing the improved alloy are also provided.

Abstract: A process for preparing a permanent magnet is disclosed. The process comprises the steps of exposing material, in particulate form, and having an overall composition comprising 8 to 30 atomic percent of a first constituent selected from the group consisting of rare earth metals, 42 to 90 atomic percent of a second constituent selected from the group consisting of transition metals and 2 to 28 atomic percent of a third constituent selected from the group consisting of substances from Group III of the Periodic Table, to hydrogen gas under conditions such that hydrogen gas is absorbed by the material, exposing the hydrided material, in particulate form, to oxygen or an oxygen-containing gas in an amount and for a period of time sufficient to passivate the material, and compacting the material. Also disclosed are products from this process, namely, passivated, hydrided particles, alloy compacts formed of passivated, hydrided material and permanent magnets, having superior properties.

Abstract: This invention relates to a process for producing a rare earth-containing powder comprising crushing a rare earth-containing alloy in water, drying the crushed alloy material at a temperature below the phase transformation temperature of the material, and treating the crushed alloy material with a passivating gas at a temperature from the ambient temperature to a temperature below the phase transformation temperature of the material. Rare earth-containing alloys suitable for use in producing magnets utilizing the powder metallurgy technique, such as Nd-Fe-B and Sm-Co alloys, can be used. The passivating gas can be nitrogen, carbon dioxide or a combination of nitrogen and carbon dioxide. If nitrogen is used as the passivating gas, the resultant powder has a nitrogen surface concentration of from about 0.4 to about 26.8 atomic percent. Moreover, if carbon dioxide is used as the passivating gas, the resultant powder has a carbon surface concentration of from about 0.02 to about 15 atomic percent.

Abstract: This invention relates to a process for producing a rare earth-containing material capable of being formed into a permanent magnet comprising crushing a rare earth-containing alloy and treating the alloy with a passivating gas at a temperature below the phase transformation temperature of the alloy. This invention further relates to a process for producing a rare earth-containing powder comprising crushing a rare earth-containing alloy in a passivating gas at a temperature from ambient temperature to a temperature below the phase transformation temperature of the material. This invention also relates to a process for producing a rare earth-containing powder comprising crushing a rare earth-containing alloy in water, drying the crushed alloy material at a temperature below the phase transformation temperature of the material, and treating the crushed alloy material with a passivating gas at a temperature from the ambient temperature to a temperature below the phase transformation temperature of the material.

Abstract: An ultrasonic signal drive/sense circuitry is provided, which circuitry is adaptable to a variety of automated or manual fastener tightening operations. This circuitry operates for measuring tension in a fastener as a function of change in time of flight of an ultrasonic wave. A microcontroller directs the operation of circuit components to generate high amplitude, high repetition rate, drive pulses with these amplitude and repetition rate factors being electronically adjustable to compensate for fastening tool and fastener acoustical properties and tightening rates. Software driven timing circuitry calculates, calibrates and adjusts pulse echo detection window width and center location and also optimum echo detection threshold. This timing circuitry is implemented by digital techniques to measure pulse time of flight and incorporates analog interpolation of data between digital counts. Sampling rates of the echo pulses are adjusted to tool speed.