A method and related system and apparatus for refurbishing worn rail transit rails to a desired refurbished rail surface profile substantially similar to the surface profile of a newly-manufactured rail, comprising: depositing a first line of fill material along a lower-inside section to be refurbished; in N1 successive iterations thereafter, progressing circumferentially from the lower-inside section to be refurbished to an upper-outside section to be refurbished, depositing an n+1.sup.th line of fill material adjacent an n.sup.th line of fill material wherein the n.sup.th line of fill material substantially provides a flow barrier against the n+1.sup.th line of fill material flowing past the n.sup.th line of fill material.

A knotter assembly for use in a wire-tieing system, and method for removing and replacing a twist-module sub-assembly in a knotter assembly on a material baling apparatus. Embodiments of the knotter assembly include a slidably removable twist module assembly, a ratcheted cover arm assembly, and a torque tube assembly having two operating arms that carry all of the operating components for activating various elements of the knotter assembly.

Methods for aircraft component repair and reclamation are provided. Cold spraying aircraft panels include identifying a fastener hole in an aircraft panel in need of repair, capturing the location of the fastener hole, and depositing cold spray material about the fastener hole for reclaiming the aircraft panel. Any excess material may be removed. Cold spraying hydraulic lines includes identifying a surface of the hydraulic line in need of repair, aiming a cold spray nozzle at the surface of the hydraulic line and depositing a cold spray material on the surface of the hydraulic line. Excess cold spray material may be removed as needed.

A method and related system and apparatus for refurbishing worn rail transit rails to a desired refurbished rail surface profile substantially similar to the surface profile of a newly-manufactured rail, comprising: depositing a first line of fill material along a lower-inside section to be refurbished; in N1 successive iterations thereafter, progressing circumferentially from the lower-inside section to be refurbished to an upper-outside section to be refurbished, depositing an n+1.sup.th line of fill material adjacent an n.sup.th line of fill material wherein the n.sup.th line of fill material substantially provides a flow barrier against the n+1.sup.th line of fill material flowing past the n.sup.th line of fill material.

An earth-boring tool includes a tool body of a fixed-blade reaming apparatus configured to be coupled within the drilling assembly. The tool body has a longitudinal axis and at least one reamer blade configured to be outwardly extendable for use in an expandable reamer and attachable on a fixed-blade reamer. The at least one reamer blade is attached to the tool body in an immovable manner relative to the tool body during use of the earth-boring tool in the formation of a subterranean wellbore.

A firearm including a receiver, a barrel, a breech bolt assembly, and a trigger assembly. The bolt assembly has a bolt including a body portion, a lug portion, and a firing pin bore. The lug portion includes outward extending lugs, a cartridge recess, and an off-center hole. The bolt assembly also includes an extractor and an ejector pin. At least some of the lugs on the lug portion of the bolt have a tapering outer face so that a rearward face of the respective lug is taller than a forward face of the respective lug. In another aspect, at least some of the lugs on the lug portion of the bolt have tapering side faces so that a rearward face of the respective lug is wider than a forward face of the respective lug.

A spindle repair kit including a pair of alignment mandrels positionable in a respective spindle bore of a steering spindle. An alignment rod is operative to retain the mandrels in their respective spindle bores. The kit can also include a first clamp member and a second clamp member, each being positionable between the spindle bores. The kit includes a drill fixture including a drill mounting surface and a bearing fixture including a bearing aperture sized to receive the alignment rod. Fasteners clamp the drill fixture and first clamp member to the first spindle bore and clamp the bearing holder and second clamp member to the second spindle bore. The kit includes an arbor connectable to a drill and a reamer, wherein the arbor is sized to position the reamer in the first spindle bore.

The invention relates to a repair method for a component and includes the steps of removal of a damaged region of the component with the formation of at least one separating surface; arrangement of the component in a processing chamber of a device for the additive restoration of at least the region of the component that has been removed; determining first structural data of the component disposed in the processing chamber; providing second structural data of the component; determining third structural data based on the first and the second structural data; and additive restoration of the component region that has been removed on the at least one separating surface of the component. In addition, the invention relates to a device for the additive repair of a component.

A firearm including a receiver, a barrel, a breech bolt assembly, and a trigger assembly. The bolt assembly has a bolt including a body portion, a lug portion, and a firing pin bore. The lug portion includes outward extending lugs, a cartridge recess, and an off-center hole. The bolt assembly also includes an extractor and an ejector pin. At least some of the lugs on the lug portion of the bolt have a tapering outer face so that a rearward face of the respective lug is taller than a forward face of the respective lug. In another aspect, at least some of the lugs on the lug portion of the bolt have tapering side faces so that a rearward face of the respective lug is wider than a forward face of the respective lug.

A method and apparatus for repairing overhead conveyor chain by removing a section of track, locating a mobile repair station under the exposed track, and effecting the needed repair on the chain by cycling the intact chain past the mobile repair station and repairing it as it passes. Repair embodiments include re-swaging and repair, replacement or rotation of chain links.