ACTIVE CHECK VALVE HAVING A MOVING MAGNET ACTUATOR

    公开(公告)号:US20220221074A1

    公开(公告)日:2022-07-14

    申请号:US17569744

    申请日:2022-01-06

    IPC分类号: F16K15/18 F16K31/06

    摘要: Described is an active check valve that uses electro-magnetic actuation for operation. The valve includes a plunger assembly having a magnet in a sealed internal volume. The plunger assembly further includes a plunger tip that extends from either a plunger assembly housing or a sealing member. Although the plunger assembly is disposed in the solvent flow, the magnet is not exposed to the solvent. When the valve is actuated, the plunger tip moves the sealing member to open or close the valve. Optionally, an arming force may be applied to the sealing member in advance of opening or closing to reduce the subsequent additional force necessary to move the sealing member during opening or closing, thereby improving the accuracy of the solvent composition in liquid chromatography system applications.

    Chromatography column assembly
    4.
    发明授权

    公开(公告)号:US10802002B2

    公开(公告)日:2020-10-13

    申请号:US15990097

    申请日:2018-05-25

    摘要: Described is a chromatographic column assembly that includes an outer tube comprising a metal, a first conduit disposed within the outer tube, a second conduit disposed within the outer tube, and a first joint located between the first conduit and the second conduit. The outer tube is deformed by a first uniform radial crimp at a longitudinal location along the outer tube that surrounds the first conduit on a first side of the first joint, and a second uniform radial cramp at a longitudinal location along the outer tube that surrounds the second conduit on a second side of the first joint. The first and second uniform radial cramps form a fluid-tight seal between the first conduit and the second conduit and each have a substantially flat base region over which a diameter of the outer tube is reduced for a non-zero longitudinal length.