Patent US3877310A successfully refreshed from Google Patents.
US3877310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic sampler apparatus
Assignee: Varian Medical Systems Inc
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Filing: 1973-03-05
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Granted: 1975-04-15
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Expires: 1993-03-05
Abstract
Abstract A system for injecting sample fluids into an analyzer and processing the analysis data is disclosed. The system comprises a fluid sample analyzer, a sample storage module for a number of fluid samples, an injection module by which samples are injected into the analyzer, a data recording or processing device, and a control module for governing and sequencing the operation of the system. The storage module houses a plurality of sample containing trays which can be loaded with samples remote from the system. A gas operated purging system is employed for minimizing the quantity of residual material injected into the analyzer with successive samples.
Inventors
- 👤 Raymond Ernest Pecsar
- 👤 Brent Earl Wadsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:28
CPC Classifications
G; G01; G01N; G01N35/00; G01N35/10; G01N35/1079; Y; Y10; Y10T; Y10T436/00; Y10T436/25; Y10T436/2575
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
165 words
A method of purging material from a syringe comprising: a. providing a syringe comprising a tubular barrel defining an internal passageway having an axial end opening and a side opening and a plunger supported in said passageway for axial movement relative to said barrel, the imaginary solid intersection of said internal passageway and an extension of the perimeter of said side opening defining a space within said internal passageway; b. positioning said plunger in said barrel with a projecting plunger end portion disposed at least adjacent said side opening such that said plunger end portion intersects said space defined by said imaginary solid intersection; c. directing a purging liquid fluid into said passageway through one of said openings and discharging said fluid from said passageway through the other of said openings to purge said passageway; and d. impinging said fluid on said projecting plunger end portion prior to discharging the fluid from said passageway to scrub said material from said plunger while purging said passageway.
Claim 2
Independent Claim
165 words
A method of purging material from a syringe comprising: a. providing a syringe comprising a tubular barrel defining an internal passageway having an axial end opening and a side opening and a plunger supported in said passageway for axial movement relative to said barrel, the imaginary solid intersection of said internal passageway and an extension of the perimeter of said side opening defining a space within said internal passageway; b. positioning said plunger in said barrel with a projecting plunger end portion disposed at least adjacent said side opening such that said plunger end portion intersects said space defined by said imaginary solid intersection; c. directing a purging liquid fluid into said passageway through one of said openings and discharging said fluid from said passageway through the other of said openings to purge said passageway; and d. impinging said fluid on said projecting plunger end portion prior to discharging the fluid from said passageway to scrub said material from said plunger while purging said passageway.
Claim 3
Dependent Claim
126 words
The method claimed in claim 1 further comprisiNg placing said purging fluid in a container which is closed by a septum, providing a septum piercing dipper tube element comprising a first passageway having at least a first port for communicating purging fluid from said container to said chamber, and a second passageway separate from said first passageway having a second port for communicating said gas into said container, and further comprising piercing said septum with said dipper tube element so that said first port is disposed in said container within the volume occupied by said purging fluid and said second port is disposed within the container and spaced from said first passageway port whereby the purging fluid is forced from said container through said first passageway.
References Cited (Backward Citations)
US3479880A
Cited
US3754443A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |