DE3003821C2 - - Google Patents
Info
- Publication number
- DE3003821C2 DE3003821C2 DE3003821A DE3003821A DE3003821C2 DE 3003821 C2 DE3003821 C2 DE 3003821C2 DE 3003821 A DE3003821 A DE 3003821A DE 3003821 A DE3003821 A DE 3003821A DE 3003821 C2 DE3003821 C2 DE 3003821C2
- Authority
- DE
- Germany
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
- G01N30/28—Control of physical parameters of the fluid carrier
- G01N30/32—Control of physical parameters of the fluid carrier of pressure or speed
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/78—Direct mass flowmeters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/0318—Processes
- Y10T137/0324—With control of flow by a condition or characteristic of a fluid
- Y10T137/0357—For producing uniform flow
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/0318—Processes
- Y10T137/0324—With control of flow by a condition or characteristic of a fluid
- Y10T137/0379—By fluid pressure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7758—Pilot or servo controlled
- Y10T137/7761—Electrically actuated valve
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8158—With indicator, register, recorder, alarm or inspection means
- Y10T137/8326—Fluid pressure responsive indicator, recorder or alarm
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Flow Control (AREA)
- Control Of Fluid Pressure (AREA)
- Feedback Control In General (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/011,333 US4373549A (en) | 1979-02-12 | 1979-02-12 | Mass flow/pressure control system |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3003821A1 DE3003821A1 (de) | 1980-08-14 |
DE3003821C2 true DE3003821C2 (US06521211-20030218-C00004.png) | 1987-03-19 |
Family
ID=21749922
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19803003821 Granted DE3003821A1 (de) | 1979-02-12 | 1980-02-02 | Massendurchfluss- bzw. druckmesseinrichtung, insbesondere fuer gaschromatographen |
Country Status (3)
Country | Link |
---|---|
US (1) | US4373549A (US06521211-20030218-C00004.png) |
JP (1) | JPS55107955A (US06521211-20030218-C00004.png) |
DE (1) | DE3003821A1 (US06521211-20030218-C00004.png) |
Families Citing this family (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4364413A (en) * | 1981-01-07 | 1982-12-21 | The Perkin-Elmer Corporation | Molar gas-flow controller |
US4437489A (en) * | 1981-12-24 | 1984-03-20 | Hewlett-Packard Company | Gas flow controller |
US4638444A (en) * | 1983-02-17 | 1987-01-20 | Chemical Data Systems, Inc. | Microprocessor-controlled back-pressure system for small volume chemical analysis applications |
CH667730A5 (de) * | 1984-08-29 | 1988-10-31 | Landis & Gyr Ag | Einrichtung zur erfassung des volumenstromes eines fluessigen mediums durch ein stellglied einer regelstrecke sowie deren verwendung fuer regelzwecke und/oder waermemengenmessung. |
US4760732A (en) * | 1987-06-29 | 1988-08-02 | The Dow Chemical Company | Flow programmer for gas chromatography |
US4987933A (en) * | 1989-03-03 | 1991-01-29 | Eaton Corporation | Fluid flow control method and apparatus for minimizing particle contamination |
US5240046A (en) * | 1989-03-03 | 1993-08-31 | Eaton Corporation | Fluid flow control method and apparatus for minimizing particle contamination |
JPH087195B2 (ja) * | 1989-12-22 | 1996-01-29 | 株式会社日立製作所 | ガスクロマトグラフ |
JPH03114737U (US06521211-20030218-C00004.png) * | 1990-03-06 | 1991-11-26 | ||
AT394909B (de) * | 1990-06-01 | 1992-07-27 | Vaillant Gmbh | Einrichtung zur kontinuierlichen ueberwachung eines variablen luftstromes |
US5355214A (en) * | 1990-08-31 | 1994-10-11 | Varian Associates, Inc. | Flow control device |
AU672762B2 (en) * | 1992-01-28 | 1996-10-17 | Agilent Technologies Inc. | Acoustic displacement flow meter |
US5367910A (en) * | 1992-03-12 | 1994-11-29 | Curtin Matheson Scientific, Inc. | Method and apparatus for measuring gas flow using Boyle's law |
FR2714460B1 (fr) * | 1993-12-24 | 1996-02-02 | Seva | Procédé et dispositif de fourniture de gaz sous pression. |
US5723783A (en) * | 1994-03-15 | 1998-03-03 | J & W Scientific, Incorporated | Acoustic displacement flowmeter |
GB2316773B (en) * | 1996-06-12 | 1999-09-29 | Gas Technology Canada | Electronic gas regulator |
FR2767206B1 (fr) * | 1997-08-05 | 1999-10-01 | Luc Heliot | Generateur de faibles quantites de gaz et procede de generation d'un debit constant de gaz au moyen de ce generateur |
US5962774A (en) * | 1998-04-17 | 1999-10-05 | Sandia Corporation | Real-time monitoring of volatile organic compounds using chemical ionization mass spectrometry |
ITMI981142A1 (it) * | 1998-05-22 | 1999-11-22 | Thermoquest Italia Spa | Metodo e apparecchio per l'introduzione di campioni di volume elevato in colonne capillari per gascromatografia |
GB2342870A (en) * | 1998-10-23 | 2000-04-26 | Surface Measurement Systems Lt | Inverse chromatography |
US6363958B1 (en) * | 1999-05-10 | 2002-04-02 | Parker-Hannifin Corporation | Flow control of process gas in semiconductor manufacturing |
EP1324033B1 (de) * | 2001-12-21 | 2006-09-20 | Agilent Technologies, Inc. (a Delaware corporation) | Verfahren zur Bereitstellung von Volumenströmen von Fluiden |
US7628860B2 (en) * | 2004-04-12 | 2009-12-08 | Mks Instruments, Inc. | Pulsed mass flow delivery system and method |
CN1318930C (zh) * | 2005-04-27 | 2007-05-30 | 杭州电子科技大学 | 智能执行器用阀门流量特性实现方法 |
WO2011071655A1 (en) * | 2009-12-10 | 2011-06-16 | Alcon Research, Ltd. | Systems and methods for dynamic pneumatic valve driver |
US8260695B1 (en) * | 2010-07-14 | 2012-09-04 | Steven Rosenberg | Secondary power meter for quarter-cycle power measurement and invoicing method |
US9429499B2 (en) | 2010-10-29 | 2016-08-30 | Agilent Technologies, Inc. | Methods, devices, and systems for controlling the rate of gas depressurization within a vial containing a gas sample |
US8887586B2 (en) | 2010-10-29 | 2014-11-18 | Agilent Technologies, Inc. | Head space sampling device and method for detecting leaks in same |
EP2618143B1 (en) * | 2012-01-19 | 2015-05-27 | Idexx Laboratories, Inc. | Analyzer with fluid pressure control device |
JP6971547B2 (ja) * | 2016-09-01 | 2021-11-24 | 東芝テック株式会社 | 用紙掴み機構、及びプリンタ |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL6714523A (US06521211-20030218-C00004.png) * | 1966-10-29 | 1968-05-01 | ||
DE1943409A1 (de) * | 1968-08-29 | 1970-04-02 | Toyo Rayon Company Ltd | Vorrichtung zum Steuern des Mengenflusses einer Fluessigkeit in einem chemischen Prozess |
US3842676A (en) * | 1971-01-06 | 1974-10-22 | Sperry Rand Corp | Altitude computer apparatus |
US3762223A (en) * | 1971-09-10 | 1973-10-02 | Conrac Corp | Digital pressure transducer |
US4016764A (en) * | 1976-07-19 | 1977-04-12 | The United States Of America As Represented By The Secretary Of The Navy | Temperature compensated, high resolution pressure transducer based on capacitance change principles |
US4086804A (en) * | 1976-10-26 | 1978-05-02 | Sperry Rand Corporation | Precision pneumatic pressure supply system |
US4205238A (en) * | 1978-02-17 | 1980-05-27 | Baxter Travenol Laboratories, Inc. | Digital electronic apparatus and casette sized for intravenous fluid-flow limiting equipment |
-
1979
- 1979-02-12 US US06/011,333 patent/US4373549A/en not_active Expired - Lifetime
-
1980
- 1980-02-02 DE DE19803003821 patent/DE3003821A1/de active Granted
- 1980-02-12 JP JP1588980A patent/JPS55107955A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS626248B2 (US06521211-20030218-C00004.png) | 1987-02-09 |
DE3003821A1 (de) | 1980-08-14 |
JPS55107955A (en) | 1980-08-19 |
US4373549A (en) | 1983-02-15 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
8125 | Change of the main classification | ||
8126 | Change of the secondary classification | ||
8128 | New person/name/address of the agent |
Representative=s name: SCHULTE, K., DIPL.-ING., PAT.-ASS., 7030 BOEBLINGE |
|
8125 | Change of the main classification |
Ipc: G05D 7/06 |
|
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |