知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

198 条记录 (耗时 0.031 秒)

    Drawing machine for drawing tubes
    36.
    发明授权
    Drawing machine for drawing tubes 有权

    公开(公告)号：US11097325B2

    公开(公告)日：2021-08-24

    申请号：US16294675

    申请日：2019-03-06

    申请人： Danieli & C. Officine Meccaniche S.P.A.

    发明人： Andrea Angelilli ,  Luca Crespan

    IPC分类号： B21C1/24 ,  B21C3/14 ,  B21C51/00

    摘要： A drawing machine (1) for drawing a tube (2), defining a longitudinal axis (Y), comprising a first die (3) for carrying out the drawing of the tube by means of the use of a mandrel (4); a device for varying the inclination (5) of the tube inlet into said first die (3); a second die (6) for carrying out a skin pass operation on the tube, arranged downstream of said first die (3); an in-line system for detecting the eccentricity of the tube; a data processing system (7) for processing signals originating from said detection system and sending input data to said device for varying the inclination (5) of the tube to vary the inclination of the tube so as to correct the eccentricity of the tube in-line; wherein said in-line system for detecting the eccentricity of the tube comprises a first detection head comprising at least three first transducers (8) arranged downstream of said first die (3).

    Composite column for use in high pressure liquid chromatography
    38.
    发明授权
    Composite column for use in high pressure liquid chromatography 有权

    公开(公告)号：US10751644B2

    公开(公告)日：2020-08-25

    申请号：US15881893

    申请日：2018-01-29

    申请人： Lake Region Manufacturing, Inc.

    发明人： Mark W. Broadley ,  John K. Eckert

    IPC分类号： B01D15/22 ,  B21C1/24 ,  G01N30/60 ,  F16L9/14 ,  B01D15/10 ,  B21C1/16 ,  G01N30/32

    摘要： A multi-walled tube that is useful as an analytical column in which chemical mixtures can be separated into their individual components is described. In order to be acceptable as an analytical column, the inner surface of the multi-walled tube must support effective separation, but not react chemically with or contaminate the solvent or the analyte (sample to be separated). Grade 316 stainless steel is typically preferred for this purpose. Moreover, the inner diameter (ID) surface of the multi-walled column is preferably very smooth (less than 10 micro inch Ra) with no interruptions in the surface such as scratches, pits, or asperities. However, since the column is designed to be attached to chromatographic equipment using standard size connection features, the size of standard fittings define the outer diameter (OD) of the column.

    METHOD OF MANUFACTURING VARIABLE WALL THICKNESS STEEL PIPE AND VARIABLE WALL THICKNESS STEEL PIPE
    39.
    发明申请
    METHOD OF MANUFACTURING VARIABLE WALL THICKNESS STEEL PIPE AND VARIABLE WALL THICKNESS STEEL PIPE 审中-公开

    公开(公告)号：US20190076902A1

    公开(公告)日：2019-03-14

    申请号：US16082894

    申请日：2017-02-14

    申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION

    发明人： Masaaki MIZUMURA ,  Keinosuke IGUCHI ,  Hidehiro ARITA

    IPC分类号： B21C37/16 ,  B21D39/20 ,  B21J5/08 ,  B21C1/24 ,  B21C37/06

    摘要： There is provided a method of manufacturing a variable wall thickness steel pipe with a hollow tubular raw pipe. The method of manufacturing a variable wall thickness steel pipe includes locking the raw pipe in a die by thrusting a plug into the raw pipe from an one end side, so as to expand an outer shape on the one end side in a state, where the raw pipe is disposed inside the die and movement of the raw pipe in a longitudinal direction is restricted; and performing ironing in which an inner shape of the raw pipe is expanded while the outer shape is maintained so that a thin portion is formed by further thrusting the plug toward the other end side of the raw pipe while the locked state of the raw pipe is maintained, whereas the restriction on the raw pipe is relaxed.