86 results about "Stress fractures" patented technology

The present invention is directed to a lighweight the with a tapered support angle reverse, to the angle of the roof, a tile having uniform contact with the roof surface that does not require battens and can be walked on without the fear of breaking. This the can be fabricated in several materials including concrete, ceramic, porcelain or clay. By increasing the surface area of the underside of this tile with numerous cavities and ribs, the capability for dissipating heat is greatly increased. The lightweight tile has the option of incorporating a breathable, underlying cushioning/insulating With this system of interlocking and overlapping tiles, when the top tile overlaps the tile below the top tile cantilevers and lays flat on the tile below it, greatly reducing the vulnerability to stress fracture because of the reverse angle and supporting ribs structure of the tile.

A method for the measurement of the stresses and pressure perturbations surrounding a well, and a system for computing the optimum location for initiating a hydraulic stress fracture. The technique includes using sensors attached to the wellbore casing connected to a data analyzer. The analyzer is capable of analyzing the stresses on the well system. Using an inverse problem framework for an open-hole situation, the far field stresses and well departure angle are determined once the pressure perturbations and stresses are measured on the wellbore casing. The number of wellbore measurements needed for the inverse problem solution also is determined. The technique is also capable of determining the optimal location for inducing a hydraulic fracture, the effect of noisy measurements on the accuracy of the results, and assessing the quality of a bond between a casing and a sealant.

An improved face for a golf club head includes shallow and deep markings configured to provide a pleasing appearance when viewed head on, and to frame the central region of the impact surface of the face when viewed at address. Use of only shallow markings in the central region of the impact surface prevents existence of stress fractures resulting from use of deep markings in the central region. This allows for a face thinner than those incorporating conventional grooves in the central regions of their impact surfaces, resulting in both superior resistance to cracking and improved C.O.R. Specified methods of manufacture are particularly suited for making clubs incorporating these shallow and deep markings.

A multiple punch and multiple die assembly has a workpiece protector comprising a punch lifter that is operatively associated with each punch for supporting each of the punches in an inactive position as an active punch is moved by the ram to the active, i.e. operating position to thereby eliminate scoring or marking of the sheet material or other workpiece that is being punched. To eliminate the need for hand tools and hand assembly or disassembly, a manually moveable retainer on the punch assembly is provided that can be moved by hand between a punch-releasing and punch-retaining position for holding the punches within the multi-punch assembly during operation. To prevent stress fractures that formerly occurred in die carriers, support of each die is distributed between two different die components thereby reducing impact stress on the carrier as the ram drives the punch through the workpiece.

A method of inspecting aircraft for evidence of stress fracture and other external abnormalities comprising: (a) identifying an aircraft surface to be inspected; (b) determining if the surface to be inspected is visually impeded by a coating compound selected from the group of compounds including paint, topcoats, and primers; (c) if present removing all visually impeding compounds identified in (b); (d) inspect the aircraft surface identified in (a); (e) identify and procure adhesive tape patch with properties generally consistent to those demonstrated in 3M product 8681 HS Polyurethane Protective Tape; and, (f) applying the adhesive patch of (e) over the inspected aircraft surface.

Disclosed herein is a repair apparatus and method for pipe and fittings. In one form, the method relates to utilizing fabric-like material which is intermixed with an adhesive. In one form, the adhesive is a two-part adhesive which hardens to a semi-rigid state to avoid stress fractures through repeated expansion and contraction due to physical movement or temperature variation in the pipe and/or fittings. In one form the method and apparatus are particularly useful in thermoplastic pipes. In other forms, the method is particularly useful in metal pipes and fittings, or in non-pipe structures.

Disclosed herein is a repair apparatus and method for pipe and fittings. In one form, the method relates to utilizing fabric-like material which is intermixed with an adhesive. In one form, the adhesive is a two-part adhesive which hardens to a semi-rigid state to avoid stress fractures through repeated expansion and contraction due to physical movement or temperature variation in the pipe and/or fittings. In one form the method and apparatus are particularly useful in thermoplastic pipes. In other forms, the method is particularly useful in metal pipes and fittings, or in non-pipe structures.

The invention provides a method for improving the seam net complexity through circulation stress fracturing. By aiming at a sand-mud interbedding developing compact reservoir, the reservoir longitudinal stress feature study is firstly started; concrete reservoir ground stress factors influencing the seam expansion are clarified; then, the influence of the circulation stress fracturing on the seam net expansion is studied; and concrete circulation pump injection parameters are optimized. Through the study on the reservoir longitudinal stress distribution and the stress circulation rock fracture experiment study, the sand-mud interbedding developing compact reservoir is discovered; through the circulation pump injection fracturing, the complicated rock shearing damage can be generated, so that the seam net complexity degree is very complicated; the breakthrough of a plurality of sand-mud stress shielding layers in the longitudinal direction can be realized, so that a plurality of thin inter-oil layers in the longitudinal direction can be sufficiently transformed; and a more complicated seam net system is formed in the transverse direction. Compared with the early stage mixed water volume fracturing technology, the method has the advantage that the great improvement of single-well yield is facilitated.

A method of deep acid stimulation for a zone to be treated in an underground formation using an acidizing tool, the method including the steps of introducing the acidizing tool into the well bore, introducing the acid formulation onto the well bore wall at the treatment zone and introducing ultrasound energy into the underground formation at the treatment zone. The subsequent acid penetration depth is deeper than the initial acid penetration depth. A method of stress fracturing a portion of an underground formation includes the steps of introducing the acidizing tool into a well bore and introducing the acid formulation and the ultrasound energy at the focused treatment point. The weakened acidized spots in combination with the stress on the underground formation causes oriented stress-induced fractures to form that are fluidly coupled with the well bore. An acidizing tool includes an acid delivery system and an ultrasonic transmitter.

A method for making a hard pretzel product that effectively absorbs a seasoning slurry, such as an oil-based seasoning added after baking. In a preferred embodiment, three dough strands extruded simultaneously are cut and formed into a triad arrangement of three dough rods. Several process steps are used singly or in combination to promote the formation of a stress cracking at the intersection between these three rods in the triad formation. During the final drying stage and a seasoning stage in a seasoning tumbler, this stress cracking is sufficient to allow separation of the three rods into individual pretzel sticks. Each of these pretzel sticks has a longitudinal surface area in the proximity of the original stress fracturing which effectively absorbs a seasoning slurry.

A method and apparatus for forming controlled stress fractures in metal produces electrically isolated, closely spaced circuit sub-entities for use on a metallized printed wiring board. A polymeric substrate has a layer of metal adhered to the surface, and the metal layer is formed into entities. Each entity has a fracture initiating feature formed into it, which serves to initiate and/or direct a stress crack that is induced in the metal. The entities are fractured in a controlled manner by subjecting the substrate and the entities to mechanical stress by a rapid thermal excursion, creating a stress fracture in the entity extending from the fracture initiating feature. The stress fracture divides each entity into two or more sub-entities that are electrically isolated from each other by the stress fracture. The resulting structure can be used to form circuitry requiring very fine spaces for high density printed circuit boards. The rapid thermal stress may be induced by a high intensity, strobed xenon arc lamp.

A novel probe design is presented that increases a probe tolerance to stress fractures. Specifically, what is disclosed are three features increase stress tolerance. These features include a various union angle interface edge shapes, pivot cutouts and buffers.

A concrete re-entrant corner crack inhibiting device for implantation into a re-entrant corner of a casted concrete structure serves to inhibit stress fractures from developing at the cured concrete re-entrant corners. The device includes a re-entrant corning brace for cornering and embedding onto the re-entrant corner, a radial arm radiating outwardly from the brace so to extend into the cement structure and a fracture interrupting unit transversely connected to the radial arm so as to intercept, interrupt and inhibit the development and spread of stress fractures emanating from a cured cement re-entrant corner.

The invention discloses a lumbar interbody fusion cage. The lumbar interbody fusion cage comprises a fusion cage body, a tail plate and a distraction nail, wherein a cavity for containing a bone graft is formed in the fusion cage body; the tail plate is detachably connected to the rear side surface of the fusion cage body; the distraction nail comprises a first distraction nail and a second distraction nail; the first distraction nail is configured to be driven into the upper segment of a vertebra; and the second distraction nail is configured to be driven into the lower segment of the vertebra. The lumbar interbody fusion cage has the beneficial effects that location moving such as withdrawal of the fusion cage can be prevented, so that the fusion cage can be located relatively well; meanwhile, the distraction nails are driven into the upper segment of the vertebra and lower segment of the vertebra in a vertical direction; and after the fusion cage is implanted, a human body is upright, and the possibility of stress fracture does not occur.