US3869068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diluter probe assembly
Assignee: Hyperion Inc
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Filing: 1974-06-06
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Granted: 1975-03-04
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Expires: 1994-06-06
Abstract
Abstract The diluter probe assembly disclosed herein employs a pressureresponsive valve which allows the diluter to aspirate a small quantity of a sample liquid through a needle-like capillary probe and to then discharge a relatively large volume of diluent through an outer conduit surrounding the needle-like probe.
Inventors
- 👤 Bu Shing Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:36
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/28; G01N1/38
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
174 words
A probe assembly for use with a diluter of the type which, through a common conduit, aspirates to draw a relatively small sample and then discharges a relatively large quantity of diluent, said probe assembly comprising: an outlet member having therein a port which is connected to the common diluter conduit; an outer probe conduit connected to said outlet member peripherally of said port; an inner probe conduit member including a needle-like portion extending through and below the lower end of said outer conduit, the upper end of said inner conduit member being of substantially larger diameter than said needle-like portion and being provided with means for forming a seal to said outlet member around said port; and means for resiliently biasing said inner conduit member upwardly into sealing engagement with said outlet member, whereby, when the pressure at said port during discharge of diluent overcomes said resilient means, diluent can flow through said outer conduit around said inner conduit at flow rates exceeding those possible through said needle-like portion of said inner conduit.
Claim 2
Dependent Claim
174 words
A probe assembly for use with a diluter of the type which, through a common conduit, aspirates to draw a relatively small sample and then discharges a relatively large quantity of diluent, said probe assembly comprising: an outlet member having therein a port which is connected to the common diluter conduit; an outer probe conduit connected to said outlet member peripherally of said port; an inner probe conduit member including a needle-like portion extending through and below the lower end of said outer conduit, the upper end of said inner conduit member being of substantially larger diameter than said needle-like portion and being provided with means for forming a seal to said outlet member around said port; and means for resiliently biasing said inner conduit member upwardly into sealing engagement with said outlet member, whereby, when the pressure at said port during discharge of diluent overcomes said resilient means, diluent can flow through said outer conduit around said inner conduit at flow rates exceeding those possible through said needle-like portion of said inner conduit.
Claim 3
Dependent Claim
36 words
A probe assembly as set forth in claim 1 wherein said outer probe conduit tapers at its lower end to an inner diameter which fits loosely around said needle-like portion of said inner probe conduit member.
Claim 4
Dependent Claim
25 words
A probe assembly as set forth in claim 1 wherein the lower end of said inner probe member comprises a length of hypodermic syringe tubing.
Claim 5
Dependent Claim
32 words
A probe assembly as set forth in claim 3 wherein the upper portion of said inner probe conduit member comprises a length of tubing of diameter significantly larger than said hypodermic tubing.
Claim 6
Dependent Claim
61 words
A probe assembly as set forth in claim 4 wherein the upper portion of said outer probe conduit is of substantially larger diameter than the larger diameter tubing of the upper portion of the inner probe conduit member and wherein said outer probe conduit tapers inwardly at its lower end to a diameter which fits loosely around said hypodermic syringe tubing.
Claim 7
Dependent Claim
30 words
A probe assembly as set forth in claim 4 wherein the upper end of said inner probe conduit member terminates in an annular flange which carries said seal forming means.
Claim 8
Dependent Claim
17 words
A probe assembly as set forth in claim 6 wherein said seal forming means comprises an O-ring.
Claim 9
Dependent Claim
46 words
A probe assembly as set forth in claim 7 wherein said outer probe conduit comprises a shoulder on the inner surface thereof and wherein said biasing means comprises a coil spring seated on said shoulder and bearing against the flange on said inner probe conduit member.
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) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |