A high temperature fastener including a bolt and a nut, where the bolt and the nut are constructed of an aluminum oxide ceramic material reinforced with silicon-carbide crystal whiskers or silicon nitride.

A method of fabricating a barrier layer on a substrate includes mixing gettering particles, diffusive particles, and matrix material in a carrier fluid to form a slurry; applying a layer of the slurry to the substrate; adjusting the surface of the layer of the slurry; and sintering the layer of the slurry to form a barrier layer. An article is also disclosed.

Detectable warning areas (DWAs) and methods of forming the same are provided. A dome-forming material can be mixed with a catalyst to form a mixture, which can then be poured into a dome-shaped cavity of a die-cast mold. A peg may be inserted into the mixture in the dome-shaped cavity of the die-cast mold. The mixture may be allowed catalyze and harden in the dome-shaped cavity of the die-cast mold, then a molded dome may be removed from the dome-shaped cavity of the die-cast mold. A portion of the molded dome such as the peg may be inserted into a hole in a prepared substrate. The dome may also be prepared by grinding an outer top surface with a drilling attachment. The dome may instead be formed with the use of an insert and a mat template.

A universally adaptable waffle-cavity form and methods for constructing a waffle panel are described. The waffle-cavity form is provided with a standard shape and size and can be easily adapted to alter the dimensions thereof. The form can be cut down and combined with one or more other cut coven forms to provide a combined form with desired dimensions. The forms can also be combined without first being cut down through the use of a saddle that is placed over a joint therebetween. A plurality of the forms can be affixed to a mold decking in a desired arrangement using anchors installed therebetween to form a mold that is reusable to produce multiple waffle panels.

Detectable warning areas (DWAs) and methods of forming the same are provided. A dome-forming material can be mixed with a catalyst to form a mixture, which can then be poured into a dome-shaped cavity of a die-cast mold. A peg may be inserted into the mixture in the dome-shaped cavity of the die-cast mold. The mixture may be allowed catalyze and harden in the dome-shaped cavity of the die-cast mold, then a molded dome may be removed from the dome-shaped cavity of the die-cast mold. A portion of the molded dome such as the peg may be inserted into a hole in a prepared substrate. The dome may also be prepared by grinding an outer top surface with a drilling attachment. The dome may instead be formed with the use of an insert and a mat template.

A seamless stamp device for impressing configuration into deformable materials includes a recess member having a substantially planar top wall and an undulating bottom wall with a plurality of ridges integrally joined to the bottom wall, the ridges defining a preselected pattern upon the bottom wall. The seamless stamp device further includes a protrusion member having a substantially planar top wall and an undulating bottom wall with a plurality of ridges integrally joined to the bottom wall, the ridges defining a preselected pattern upon the bottom wall. The recess and protrusion members are detachably engaged such that the undulating bottom walls and ridges of the engaged members provide a continuous, seamless design or pattern in the surface of a deformable material when the recess and protrusion members are forcibly inserted into the deformable material, then vertically elevated and vertically lowered and repositioned upon a different portion of the surface of the deformable material. The method repeating until the entire surface of the deformable material has been configured with the designs of the bottom walls and ridges of the recess and protrusion members.

A mold for manufacturing interlocking, dry-cast concrete retaining wall blocks in an upright orientation comprises a mold box comprising two side walls joined to end walls to define a mold cavity, a top face, and a substantially open bottom face. Partitions configured to define a space between adjacent blocks or a space between a block and a side of the mold box extend parallel to the side walls of the mold box substantially from the top face into the mold cavity, to form first transverse portions of the profile of the top and bottom surfaces the blocks which do not include any undercut portion that would impede removal of the mold box in a substantially vertical direction. At least one removable insert comprises insert members which, when positioned in the mold box beneath the partitions, form remaining transverse portions of the profile of the top and bottom surfaces, the remaining transverse portions including at least one undercut portion. The insert members, when in position in the mold box for casting, are substantially in lateral alignment with respective bottom surfaces of at least some of the partitions and can be inserted and retracted through openings in an end wall of the mold box.

A semiconductor manufacturing device member according to the present invention includes a ceramic disc with an internal electrode and a ceramic shaft that supports the disc. The disc and the shaft are integrated without having a bonding interface.

A concrete mat apparatus, includes a plurality of elongated concrete members, each member being aligned with and next to another concrete member. Each of the concrete members has an upper generally flat surface, a lower generally flat surface, and a plurality of inclined surfaces that each extend away from an upper or lower surface. Reinforcement extends from a first end portion of each concrete member to a second end portion thereof, the reinforcement including a plurality of longitudinally extending reinforcement bars and a plurality of encircling tie bars at spaced apart intervals. Cabling connects each of the elongated concrete members to another of the elongated concrete members. The upper inclined surfaces of one of the elongated concrete members forms a plane with the lower inclined surface of an adjacent elongated concrete member. A plurality of loops are provided along opposed edges of the mat.

Precast utility enclosure aprons for buried utility enclosures that have an angled top surface to direct water, ice and debris away from the center of the apron and to limit damage to the apron and utility enclosure caused by impacts to the apron.