Patent US4619473A successfully refreshed from Google Patents.
US4619473A
Expired / Lapsed
US
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Fluid passage connector for liquid chromatograph
Assignee: Tokyo Rikakikai Co Ltd
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Filing: 1984-04-16
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Granted: 1986-10-28
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Expires: 2004-04-16
Abstract
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.
Inventors
- 👤 Noboru Someya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:57
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/60; G01N30/6004; G01N30/6026; B; B01; B01D; B01D15/00; B01D15/08; G01N30/6034
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
173 words
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.
Claim 2
Dependent Claim
173 words
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.
Claim 3
Dependent Claim
27 words
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.
Claim 4
Dependent Claim
29 words
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.
Claim 5
Dependent Claim
26 words
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.
Claim 6
Dependent Claim
34 words
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.
Claim 7
Dependent Claim
18 words
A fluid passage connector as defined in claim 1, in which said tube is formed of stainless steel.
Claim 8
Dependent Claim
18 words
A fluid passage connector as defined in claim 3, in which said tube is formed of stainless steel.
Claim 9
Dependent Claim
18 words
A fluid passage connector as defined in claim 4, in which said tube is formed of stainless steel.
Claim 10
Dependent Claim
18 words
A fluid passage connector as defined in claim 5, in which said tube is formed of stainless steel.
Claim 11
Dependent Claim
18 words
A fluid passage connector as defined in claim 1, in which said tube is formed of synthetic resin.
Claim 12
Dependent Claim
18 words
A fluid passage connector as defined in claim 3, in which said tube is formed of synthetic resin.
Claim 13
Dependent Claim
18 words
A fluid passage connector as defined in claim 4, in which said tube is formed of synthetic resin.
Claim 14
Dependent Claim
18 words
A fluid passage connector as defined in claim 5, in which said tube is formed of synthetic resin.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-27 | 1990-04-28 | 1990-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-27 | 1994-04-28 | 1994-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-27 | 1998-04-28 | 1998-10-28 | $7700.00 | Window Closed / Lapsed |