US3672226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromatograph inlet with rotating septum
Assignee: Hamilton Co Inc
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Filing: 1969-12-18
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Granted: 1972-06-27
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Expires: 1989-12-18
Abstract
Abstract A septum inlet apparatus for chromatographs having a ported body and a septum disc carried by a rotatably mounted septum carrier driven by an electric motor through speed reduction gearing. The septum is rotatably moved a predetermined amount by operating the motor for a predetermined period of time to move a used portion of the septum out of operative position and bring into operative position an unused portion.
Inventors
- 👤 John D Reid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:22
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/16; G01N30/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
204 words
A septum inlet apparatus for chromatographs, comprising: A. a body having an adaptor bore therein adapted to receive carrier gas; B. a column adaptor operably disposed in said adaptor bore, said column adaptor having a fluid flow Passage therein adapted to be connected to the column of a chromatograph; C. a rotatable septum carrier operably carried by said body; D. a septum carried by said septum carrier and rotatable therewith; E. a needle guide having a needle guide passage therethrough parallel to the axis of said septum carrier but radially offset from said axis, the fluid flow passage in the column adaptor being aligned with the needle guide passage; F. resilient means for applying yielding pressure to the outer side of said septum; G. means for rotating said septum carrier; H. the body having a cylindrical recess in one end in which the septum carrier is rotatable, said septum carrier being cupshaped and having a peripheral wall and an end wall having an axial bore therethrough, said end wall having an axial groove in the bottom thereof concentric with said bore; and a secondary seal in said groove providing a seal between the septum carrier and the bottom of the recess in the body.
Claim 2
Dependent Claim
204 words
A septum inlet apparatus for chromatographs, comprising: A. a body having an adaptor bore therein adapted to receive carrier gas; B. a column adaptor operably disposed in said adaptor bore, said column adaptor having a fluid flow Passage therein adapted to be connected to the column of a chromatograph; C. a rotatable septum carrier operably carried by said body; D. a septum carried by said septum carrier and rotatable therewith; E. a needle guide having a needle guide passage therethrough parallel to the axis of said septum carrier but radially offset from said axis, the fluid flow passage in the column adaptor being aligned with the needle guide passage; F. resilient means for applying yielding pressure to the outer side of said septum; G. means for rotating said septum carrier; H. the body having a cylindrical recess in one end in which the septum carrier is rotatable, said septum carrier being cupshaped and having a peripheral wall and an end wall having an axial bore therethrough, said end wall having an axial groove in the bottom thereof concentric with said bore; and a secondary seal in said groove providing a seal between the septum carrier and the bottom of the recess in the body.
Claim 3
Dependent Claim
65 words
The invention defined by claim 1, wherein the peripheral wall of the septum carrier has a pair of oppositely positioned radial notches; and the means for rotating the septum carrier includes a gear having a hub, a pair of oppositely extending radial pins carried by said hub and slidingly disposed in said notches to permit axial movement of said hub relative to said septum carrier.
Claim 4
Dependent Claim
101 words
The invention defined by claim 2, wherein there is a cylindrical lug upstanding from the bottom of the recess in said body and extending in the axial bore in the bottom wall of the septum carrier, the free end of said lug being flat and normal to the axis of said lug and providing a backing for the septum, said lug having a needle bore therethrough offset from the axis of said lug and in alignment with the needle guide passage of the needle guide, said needle bore also being in alignment with the fluid flow passage of said column adaptor.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |