Fluid passage connector for liquid chromatograph

• US 4,619,473 A
• Filed: 04/16/1984
• Issued: 10/28/1986
• Est. Priority Date: 04/18/1983
• Status: Expired due to Term

• Current Assignee: Tokyo RIKA Kikai Company Limited 18 Tomiyama-Cho Kanda Chiyoda-Ku Tokyo Japan
• Original Assignee: Tokyo RIKA Kikai Company Limited
• Inventors: Someya, Noboru
• Primary Examiner(s): Scanlan, Jr., Richard J.
• Application Number:
  US06/600,784
• Time in Patent Office: 925 Days
• Field of Search: 285/353, 285/352, 285/369, 285/383, 285/334.3, 285/174
• US Class Current: 285/353
• CPC Class Codes: B01D 15/08 Selective adsorption, e.g. chromatography
• CPC Class Codes: G01N 30/6026 Fluid seals
• CPC Class Codes: G01N 30/6034 joining multiple columns

Abstract

A fluid passage connector for liquid chromatographs, which comprises a tube having a flat portion at one end, a bushing fixed to the outer periphery of said tube, a joint having therethrough a fluid passage, around the opening portion of which is provided a seal seat surface, and an engaging member for urging the bushing for said tube, which is inserted into said joint, thereby to fluid-tightly engage the flat end portion of said tube with said seal seat surface.

Claims

1. A fluid passage connector for liquid chromatographs comprising a push bolt having a threaded portion at one end thereof and an axial hole therethrough;

a tube extending through said axial hole, with the end of said tube extending through said hole, and proximate said threaded portion, being flat;

a ferrule surrounding said tube near end thereof and abutting said one end of said push bolt;

a cylindrical packing member having an axial recess at one end thereof terminating in a shoulder and having an axial passage therethrough;

said end of said tube being seated in said axial recess against said shoulder; and

a joint member having an axial opening therein terminating in a shoulder, at least a portion of the wall surrounding said opening distal from said last-mentioned shoulder being threaded, and an axial passage therethrough;

said cylindrical packing member being seated in said axial opening against said last-mentioned shoulder;

said threaded portion of said push bolt being inserted in said axial opening and threadedly engaged therewith;

whereby a fluid-tight joint is produced.

2. A fluid passage connector as defined in claim 1, wherein said tube and said axial passages together form a continuous fluid passage having a substantially uniform diameter.

3. A fluid passage connector as defined in claim 1, in which the flat end portion of said tube is engaged with a seal seat surface in said cylindrical packing.

4. A fluid passage connector as defined in claim 1, in which the flat end portion of said tube is engaged directly with a seal seat surface.

5. A fluid passage connector as defined in claim 3, in which said seal seat surface is defined by said cylindrical packing to be fitted to said tube having a flat portion at one end.

6. A fluid passage connector as defined in claim 1, in which said tube is formed of stainless steel.

7. A fluid passage connector as defined in claim 3, in which said tube is formed of stainless steel.

8. A fluid passage connector as defined in claim 4, in which said tube is formed of stainless steel.

9. A fluid passage connector as defined in claim 5, in which said tube is formed of stainless steel.

10. A fluid passage connector as defined in claim 1, in which said tube is formed of synthetic resin.

11. A fluid passage connector as defined in claim 3, in which said tube is formed of synthetic resin.

12. A fluid passage connector as defined in claim 4, in which said tube is formed of synthetic resin.

13. A fluid passage connector as defined in claim 5, in which said tube is formed of synthetic resin.