US3978888A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary measuring valve
Assignee: Jeol Ltd
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Filing: 1975-11-20
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Granted: 1976-09-07
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Expires: 1995-11-20
Abstract
Abstract An analyzing apparatus which automatically and sequentially analyzes a large number and variety of chemical samples which are divided into a plurality of fractions, whereby each sample is simultaneously tested with different chemicals under suitable reaction conditions. The system operates under pressurized closed flow conditions, that is to say, the solution flow lines are compressed with an inert gas, whereby the formation of air bubbles in the flow system, oxidization of samples, reagents, the rise of noxious fumes, are prevented.
Inventors
- 👤 Toyohiko Naono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:21
CPC Classifications
G; G01; G01N; G01N35/00; G01N35/10; G01N35/1009; G01N2035/1025; G01N35/1079; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86501; Y10T137/86558; Y10T137/86566
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
259 words
A sample measuring valve comprising: a. a first rotatable member which is provided with a plurality of sample measuring channels radially spaced and extending between a pair of planar surfaces; b. a second fixed member which is arranged to abut one surface of the said first member and is provided with an equal number of radially spaced flow lines corresponding to the said sample measuring holes and grooves around every other flow line joining radially spaced points equal distance between each flow lines; c. a third member arranged to abut the other surface of said first member and being equipped with an equal number of radially spaced flow lines that correspond to said sample measuring holes, a fluid drawing flow line, fluid introducing flow line, the said fluid drawing flow line and said fluid introducing flow line being arranged astride one of said flow lines and grooves around every other flow line to join radially spaced points equal distance between the flow lines such that the first rotary member may be rotated into a position with its channels communicating with the grooves in said second and third fixed members such that the fluid may be drawn into all of the channels of the rotary member through the fluid introducing flow line by suction applied to the fluid drawing flow line and by rotating the channels they can all be aligned with the corresponding flow lines in the first and second members enabling removal of the measured sample portions of the fluid in each measuring channel of the rotary member.
Claim 2
Dependent Claim
259 words
A sample measuring valve comprising: a. a first rotatable member which is provided with a plurality of sample measuring channels radially spaced and extending between a pair of planar surfaces; b. a second fixed member which is arranged to abut one surface of the said first member and is provided with an equal number of radially spaced flow lines corresponding to the said sample measuring holes and grooves around every other flow line joining radially spaced points equal distance between each flow lines; c. a third member arranged to abut the other surface of said first member and being equipped with an equal number of radially spaced flow lines that correspond to said sample measuring holes, a fluid drawing flow line, fluid introducing flow line, the said fluid drawing flow line and said fluid introducing flow line being arranged astride one of said flow lines and grooves around every other flow line to join radially spaced points equal distance between the flow lines such that the first rotary member may be rotated into a position with its channels communicating with the grooves in said second and third fixed members such that the fluid may be drawn into all of the channels of the rotary member through the fluid introducing flow line by suction applied to the fluid drawing flow line and by rotating the channels they can all be aligned with the corresponding flow lines in the first and second members enabling removal of the measured sample portions of the fluid in each measuring channel of the rotary 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) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |