4 results about "Decreased diameter" patented technology

The present invention provides a metal material that is particularly suitable for use as a component of a compression-sealed glass hermetic seal, that has high bonding reliability with the sealing glass, that allows a large current to pass through it even with a small diameter, that can realize a lead pin that generates little heat when current is passed through it, that can appropriately compress the sealing glass and lead pin in the plate surface direction, that has high bonding reliability with the sealing glass, and that can realize a stem base that has excellent heat dissipation performance in the plate thickness direction. [Solution] The composite consists of a [Cr and / or Mo]-Cu composite having a metal structure in which Cr phases and / or Mo phases are dispersed in a Cu matrix. This [Cr and / or Mo]-Cu composite is a diameter-reduced, elongated powder metallurgy compact, and when cross-sectionally observed with an optical microscope, it has a cross-sectional structure in the elongation direction in which lamellar or linear Cr phases and / or Mo phases are dispersed in the Cu matrix, and a cross-sectional structure perpendicular to the elongation direction in which flake-like, small platelet-like, or granular Cr phases and / or Mo phases are dispersed in the Cu matrix.

A cutter for a well construction tool has a cutting structure affixed to a substrate, which defines a monotonically decreasing diameter with respect to an axial distance from an interface between the cutting structure and the substrate. A shear surface formed in the cutting structure intersects a surface of the cutting structure between the interface and an apex of the cutting structure, and defines a smaller angle with respect to a reference than the cutting structure proximate the interface and a larger angle with respect to the reference than the cutting structure proximate the apex. The apex is rotationally symmetric about a centerline of the cutting structure in all rotational directions, and a radius of curvature of the apex is at most 75 percent of a diameter of the substrate. A well construction tool includes a tool body with at least one such cutter attached to the tool body.

To provide a technology to reliably mold a cylindrical body with a tapered part by plastic working and to impart compressive residual stress to the cylindrical body even in a high-hardness and difficult-to-process material.SOLUTION: A closed end part of a bottomed cylindrical material is pressed by a punch and stretched while reducing the diameter to form a small diameter cylindrical part, and an opening end is left as it is without reducing the diameter to form a tapered part, thereby generating an intermediate material. Then, the closed end part of the intermediate material is pressed by another punch, and the small diameter cylindrical part is further reduced in diameter and stretched without reducing the diameter of the tapered part. Then, the inner peripheral surface of the tapered part is pressed by still another punch, and the small diameter cylindrical part is further reduced in diameter and stretched without reducing the diameter of the tapered part. Finally, the tapered part is clamped between the punch and a die.SELECTED DRAWING: Figure 1

A dispensing head forming a housing (B1) in which a core (B2) is arranged and a nozzle (N) inserted into the housing (B1) around the core (B2), the nozzle (N) forming, with the core (B2), a swirl chamber (2, 3, 4) and at least one swirl channel (1), characterized in that the swirl chamber defines: - a main chamber (2) of greater diameter, into which the channels (1) open, - a compression chamber (3) of reduced diameter arranged downstream of the main chamber (2), and - an annular rim (22) connecting the main chamber (2) to the compression chamber (3), the annular rim (22) comprising at least one inclined curved ramp (23), by which the flow of liquid coming from the swirl channel (1) is diverted towards the core (B2), away from the compression chamber (3).