Abstract: The present invention relates to fire-resistant pipe couplings (100) for connecting together two plain-ended pipes in a fluid-tight manner. The pipe coupling (100) comprises: a tubular casing comprising: an outer tubular casing (102); and an inner tubular casing (104), fitting entirely inside the outer casing (102); a tubular sealing gasket (106) disposed within the inner tubular casing (104); and means (116) for tensioning the casing around the gasket (106). The casing further comprises: at least one layer of fire-resistant material (124) disposed between the inner (104) and outer (102) casings; and at least one layer of thermally-insulating material (128) disposed between the tubular sealing gasket (106) and the inner casing (104), whereby the outer casing (102) and tubular sealing gasket (106) are thermally insulated from one another.

Abstract: A user-wearable illumination assembly comprising eyeglass frames supporting a pair of lenses, a mounting structure on a bridge of the eyeglass frames, a headlamp removably coupled to the mounting structure, a battery housing removably coupled to the headlamp, and a battery inside the battery housing.

Abstract: A fluid end having its fluid flow bores sealed without threading a retaining nut into the walls of each bore. The fluid ends may be assembled using a plurality of different kits that each comprise a fluid end body, a component, a retainer element, and a fastening system. The retainer element holds the component within each of the bores formed in the fluid end body and the fastening system secures the retainer element to the body. The fastening system comprises a plurality of externally threaded studs, washers and nuts in some embodiments. In other embodiments, the fastening system comprises a plurality of screws.

Abstract: A fluid end with an internal bellows can be used in high pressure environments. The bellows is disposed within a plunger bore, and has an interior isolated from a working chamber of the fluid end. An end of a plunger is received in the interior of the bellows. The bellows contains an incompressible fluid at a constant volume. As the plunger extends into the interior of the bellows, the fluid it contains is displaced. Such fluid displacement causes the bellows to extend. As the plunger is retracted, the fluid replaces the volume formerly displaced by the plunger, and causes the bellows to accordion to a retracted position.

Abstract: Apparatus and method contemplating a high pressure fluid end assembly having a body defining a body bore and defining a recess in the body intersecting the body bore. A closure is joined to the body and forms a sealing surface. A seal is mounted to the body in the recess and configured to extend from the recess beyond the body bore to seal against the sealing surface formed by the closure.

Abstract: Insert elements that may be positioned within a high pressure plug valve. The elements have two or more recessed grooves formed around the fluid opening of the elements. The grooves are spaced from one another. A seal is placed in one and only one of the grooves. As wear occurs, the seal is relocated to one of the other grooves. Instead of a series of spaced grooves in a single insert element, a kit may be formed from two or more otherwise identical insert elements, each with a single recessed groove at a different position around the fluid opening.

Abstract: A closure element for a fluid end assembly that has two or more recessed grooves formed in its outer surface. The grooves are axially offset. A seal is placed in one and only one of the grooves. As wear occurs, the seal is relocated to one of the other grooves. Instead of a series of axially offset grooves in a single closure element, a kit may be formed from two or more otherwise identical closure elements, each with a single recessed groove at a different axial position. Another closure element has a series of ledge-like surfaces defining spaces within which a seal may be received. One outer surface surrounds one or more of the other surfaces. A seal is placed in one and only one of the spaces. As wear occurs, the seal is relocated to one of the other spaces.

Abstract: A high pressure flow device having a body defining a body bore and defining a recess in the body intersecting the body bore. A closure is joined to the body and forms a sealing surface. A seal is mounted to the body in the recess and configured to extend from the recess beyond the body bore to seal against the sealing surface formed by the closure.

Abstract: Devices and methods for dispensing material from a dental handpiece. In one example, the method includes receiving an input that indicates that an amount of the material is to be dispensed from the container of the dental handpiece. The method also includes rotating an electric motor to rotate an imbalanced mass to vibrate a vibration transmission element that vibrates the material in the container. The method also includes dispensing the amount of the material from the container with a piston based on the input.

Abstract: A headlight of the type worn by medical and dental professionals includes a housing having an opening therein. A light source is positioned in the housing to output light through the opening. A singlet lens is mounted in the housing proximate the opening, and a doublet lens is disposed between the light source and the singlet lens.

Abstract: A method of treating a hoof of an ungulate animal. The method comprises coating one or both of (i) at least a portion of a bottom surface of the hoof or (ii) at least a portion of a block surface with a curable polymer and allowing the polymer to cure for a period of time. The polymer is cured within 60 seconds or less of the coating and the cured polymer has a Shore D hardness of about 10 to about 50. The curable polymer is provided as a two component system. The first component is a reaction product of (a) comprises 4-4?-diphenylmethane-diisocyanate, castor oil, isocyanatopropyltriethoxysilane, and glycidoxypropyltrimethoxysilane, and wherein (b) comprises dicyclohexylmethane-4,4-diisocyanate, polyether polyol, 4,4?-diphenylmethane-diisocyanate (MDI), and triethoxy(3-isocyanatopropyle)silane. The second component comprises polyoxypropylene oxide ether polyol, diol (2000 MW), polyxoypropylene oxide ether polyol, triol (450 MW), tetrahydroxypropylethylendiamine, metaxylenediamine, and organobismuth catalyst.

Abstract: A curing light device includes a body with a tip portion that has a plurality of elements for providing electrical energy to the distal end of the tip and for removing heat from the distal end of the tip. A light engine includes at least one light emitting element operable for emitting light and is positioned on the distal end of the tip portion. A power supply is positioned in the body and is rechargeable and includes at least one ultracapacitor element. Spring electrical contacts are positioned in the body and electrically coupled with the ultracapacitor element. The spring electrical contacts are spaced along the length of the body and configured for electrically engaging the tip portion along its length for delivering power to the light engine and for provide a spring alignment of the tip portion in the body.

Abstract: An adapter for coupling a compule with a dental handpiece including a piston. The compule contains a dental material. The adapter includes a coupling portion that defines openings for attaching the adapter to the compule and for attaching the adapter to the dental handpiece. A plunger portion extends through one opening and engages the piston. A breakable tab connects the coupling portion and the plunger portion and breaks during dispensing of the material. The plunger portion is then movable relative to the coupling portion. A tip for use with the dental handpiece includes a housing that defines a chamber. A needle extends from the housing and defines a lumen having an opening from which the dental material is dispensed. A plunger slides within the chamber to push the dental material through the lumen and includes a rib that seals the plunger against the chamber during sliding movement of the plunger.

Abstract: A pipe coupling for connecting together the ends of two pipes including a tubular casing for fitting around a pipe; tensioning means for tightening the casing around the outer surface of the pipe; and a dynamic axial restraint system comprising at least one resilient gripping ring mounted within the casing for gripping the outer surface of the pipe. The gripping ring includes an outer surface engaging with an inner surface of the casing and adapted to roll against the inner surface of the casing upon axial loading of the pipe; and an inner gripping surface for engaging the outer surface of the pipe. The gripping surface of the resilient gripping ring is adapted such that upon rolling of the outer surface against the inner surface of the tubular casing, the area of the gripping surface in contact with the pipe increases.

Abstract: A user-wearable illumination assembly comprising eyeglass frames supporting a pair of lenses, a mounting structure on a bridge of the eyeglass frames, a headlamp removably coupled to the mounting structure, a battery housing removably coupled to the headlamp, and a battery inside the battery housing.

Abstract: In one aspect, a user-wearable illumination assembly includes eyeglass frames and a headlamp removably coupled to the eyeglass frames. Electrical circuitry may be integrated with the eyeglass frames. The headlamp and the eyeglass frames have mounting structure that cooperate to removably support the headlamp thereon. A light source is disposed within the headlamp and electrical communication between the light source and the electrical circuitry of the eyeglass frames is provided by electrical contacts associated with the mounting structures of the headlamp and eyeglass frames. In another aspect, a user-wearable illumination assembly for use with eyeglass frames includes a clip assembly that is selectively removably couplable to a bridge portion of the eyeglass frames, and a headlamp coupled to the clip assembly. The illumination assembly further includes a battery that is selectively removably couplable to the eyeglass frames and at least one electrical conductor coupling the battery to the headlamp.

Abstract: Embodiments disclosed herein are directed to a method for forming an all-in-one packing, pad, and shoe substitute for a hoof having a hoof side wall and bottom wall forming an interior recess, where the method comprises adding a resin formulation to the interior recess of the hoof to form a resin plug that substantially fills an entirety of the interior recess and extends a predetermined amount beyond the bottom wall of the hoof for ground contact. The resin formulation is configured to freely flow throughout the interior recess of the hoof when added thereto and cure at a predetermined rate to form the resin plug without spillage of the resin formulation from the hoof. The formed resin plug is not attached to an external shoe. Embodiments are also directed to the all-in-one packing, pad, and shoe substitutes for a hoof formed via such method.