Patent US4810659A successfully refreshed from Google Patents.
US4810659A
Expired / Lapsed
US
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Process for injecting a minute volume of a solution and an apparatus therefor
Assignee: TOYO SODA MANUFACTURING Co Ltd 4560 OAZA TONDA SHINNANYO-SHI YAMAGUCHI-KEN JAPAN
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Filing: 1986-10-14
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Granted: 1989-03-07
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Expires: 2006-10-14
Abstract
Abstract Process for injecting a minute volume of a solution from a nozzle device by positive pressure applied from a source of compressed air with or without positive pressure applied in parallel from a cylinder device, comprising applying the positive pressure from the compressed air source at least in a final period of injection. The process enables in injecting minute volumes of solution to remarkably decrease the injection error due to a small fraction of solution remaining at the lower end of the nozzle and can be applied to advantage to those apparatus for analyses and measurements which strictly require precision in injection.
Inventors
- 👤 Yuji Higo
- 👤 Hidechika Hayashi
- 👤 Shuji Iwasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:55
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/16; G01N30/20; G01N35/00; G01N35/10; G01N35/1095; Y; Y10; Y10T; Y10T436/00; Y10T436/25; Y10T436/2575
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
95 words
A process for injecting a minute volume of a solution into a vessel with high precision, comprising the steps of: providing a reservoir including a nozzle device with a minute volume of a solution to be injected into a vessel; using mechanical pressure acting on the volume in a discharge step to discharge the volume from said reservoir and inject the volume into said vessel via said nozzle device; and supplementing said discharge step by supplying a flow of pressurized air through said nozzle device during at least a final portion of said discharge step.
Claim 2
Dependent Claim
95 words
A process for injecting a minute volume of a solution into a vessel with high precision, comprising the steps of: providing a reservoir including a nozzle device with a minute volume of a solution to be injected into a vessel; using mechanical pressure acting on the volume in a discharge step to discharge the volume from said reservoir and inject the volume into said vessel via said nozzle device; and supplementing said discharge step by supplying a flow of pressurized air through said nozzle device during at least a final portion of said discharge step.
Claim 3
Dependent Claim
61 words
Process for injecting a minute volume of a solution into a vessel according to claim 1, wherein said pressurized air is supplied in initial and final portions of said discharge step and said mechanical pressure comprises positive pressure from a cylinder device and is applied without intermission through an intermediate period between the initial and final portions of said discharge step.
Claim 4
Independent Claim
73 words
An apparatus for injecting a minute volume of a solution into a vessel with high precision, comprising: a nozzle device; a variable volume cylinder means fluidically connected to said nozzle device for filling and discharging a solution into and from said nozzle device respectively; and means for supplementing said cylinder means during discharging of the solution, said supplementing means comprising means for selectively supplying a flow of compressed air through said nozzle device.
Claim 5
Independent Claim
73 words
An apparatus for injecting a minute volume of a solution into a vessel with high precision, comprising: a nozzle device; a variable volume cylinder means fluidically connected to said nozzle device for filling and discharging a solution into and from said nozzle device respectively; and means for supplementing said cylinder means during discharging of the solution, said supplementing means comprising means for selectively supplying a flow of compressed air through said nozzle device.
Claim 6
Dependent Claim
27 words
Apparatus for injecting a minute volume of a solution into a vessel according to claim 3, wherein the nozzle device is attached to a replaceable disposable tip.
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) | 1992-03-06 | 1992-09-05 | 1993-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-06 | 1996-09-05 | 1997-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-06 | 2000-09-05 | 2001-03-07 | $7700.00 | Window Closed / Lapsed |