US3247866A - Pipette - Google Patents

Pipette Download PDF

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Publication number
US3247866A
US3247866A US32291663A US3247866A US 3247866 A US3247866 A US 3247866A US 32291663 A US32291663 A US 32291663A US 3247866 A US3247866 A US 3247866A
Authority
US
United States
Prior art keywords
chamber
valve
opening
membrane
pressure
Prior art date
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 - Lifetime
Application number
Other languages
English (en)
Inventor
Sanz Manuel Claude
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to US3118306D priority Critical patent/US3118306A/en
Priority to GB4651461A priority patent/GB953937A/en
Priority to CH6362A priority patent/CH392933A/de
Priority to FR883913A priority patent/FR1309679A/fr
Priority to DE19621498968 priority patent/DE1498968B2/de
Application filed by Individual filed Critical Individual
Priority to US32291663 priority patent/US3247866A/en
Application granted granted Critical
Publication of US3247866A publication Critical patent/US3247866A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/02—Burettes; Pipettes
    • B01L3/0282—Burettes; Pipettes mounted within a receptacle
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/10—Devices for withdrawing samples in the liquid or fluent state
    • G01N1/14—Suction devices, e.g. pumps; Ejector devices
    • 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
    • Y10T137/2713—Siphons
    • Y10T137/2842—With flow starting, stopping or maintaining means
    • Y10T137/2863—Pressure applied to liquid in supply chamber
    • 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
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7847—With leak passage
    • Y10T137/7848—Permits flow at valve interface
    • 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
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7879—Resilient material 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
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7904—Reciprocating valves
    • Y10T137/7908—Weight biased
    • Y10T137/7909—Valve body is the weight

Definitions

  • This invention relates to pipettes for transferring predetermined reproducible quantities of liquids.
  • Among the objects of the present invention is to provide means for automatically closing the outlet of said chamber upon pressure applied to the reservoir and automatically opening said outlet upon release of said pressure.
  • FIG. 1 is a side cross-sectional view of the chamber portion of a device showinga modified form of valve.
  • FIG. 2 is a cross-sectional view taken on line 66 of FIG. 1.
  • FIG. 3 is a cross-sectional view similar to FIG. 1, showing another form of valve.
  • FIG. 4 is a view taken on lines 88 of FIG. 3.
  • the chamber of FIGS. 1 and 3 corresponds to the chamber in the pipettes of said Patents 2,974,528 and 3,118,306 and has a tube 7 0 projecting therefrom.
  • Chamber 20" also includes the pipette measuring tube 25, held by plug 24 in opening 23 of said chamber 20".
  • the tube 70 is curved so that its outer end opens downwardly and is fitted with the valve casing 71.
  • the front or lower end 72 of said valve contains the opening 73 and on the inside forms the valve seat for the movable valve membrane 74 which consists, for example, of a disk-shaped membrane cut from a film or thin sheet of impervious material such as polyethylene.
  • the member 76 includes a central opening 77 continuous with the opening of tube 70.
  • member 76 extends fairly close to the valve membrane 74 to keep said membrane in position but said member 76 has slots 78, 79 extending from the opening 77 to the side of the member which slots prevent the movable membrane 74 from'shutting oif movement of air into the chamber 20". Since the movable valve membrane 74 is very light in weight and has a minimum of inertia, the membrane moves quickly to open the valve when pressure is released within the chamber 20" and does not permit any liquid to be aspirated from capillary 25.
  • valve mechanism has a connecting tube 80 fitting in the opening 81 3,247,866 Patented Apr. 26, 1966 of chamber 20".
  • the opening 86 of tube 80 extends through the backing plate 82 which forms a rest portion for the valve member 83.
  • Plate 82 contains channels 84, 85 extending from the opening 86 to the sides thereof so that valve member 83 is not effective in shutting off the flow of air into the chamber 20".
  • the upper end 87 of the valve has an internal flat surface and includes the opening 88.
  • Valve member 83 is formed of two disk shaped membranes 89 and 90 of polyethylene or similar film which are held apart in the center portion by electrostatic repulsion or which are held apart by entrapped air between the completely sealed edges of the membranes.
  • the membranes 83 Upon application of pressure to the container and the transfer of such pressure to the chamber 20" the membranes 83 move against the inside surface of top 87 and close the opening 88. At the same time, the membrane valve 83 quickly opens orifice 88 when pressure is released from chamber 20".
  • Valve means adapted to open and close in response to very slight changes in pressure comprising,
  • a casing including a valve seat on a first side thereof having a central opening and a relatively flat surface surrounding the opening
  • a light movable valve member comprising a membrane of at least one thin impervious plastic film and having area substantially greater than the area of said central opening
  • said casing having a second side, which includes a fluid conduit, for limiting the movement of the valve member away from the first side,
  • said second side of said casing including grooves which connect the fluid conduit to a region beyond the area covered by said membrane whereby said membrane is not effective in stopping movement of fluid outward with respect to the second side, and in combination therewith a chamber to which pressure can be applied connected to said fluid conduit of said second side,
  • said light movable valve member comprising a pair of disks of plastic film sealed at the edges thereof with gas entrapped therebetween, said disk adjacent the opening of said first side being substantially flat.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Hydrology & Water Resources (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Clinical Laboratory Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Devices For Use In Laboratory Experiments (AREA)
US32291663 1961-01-06 1963-11-12 Pipette Expired - Lifetime US3247866A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US3118306D US3118306A (en) 1961-01-06 Pipette
GB4651461A GB953937A (en) 1961-01-06 1961-12-28 Pipette
CH6362A CH392933A (de) 1961-01-06 1962-01-04 Flüssigkeits-Aufnahme- und Abgabe- Vorrichtung mit Pipette
FR883913A FR1309679A (fr) 1961-01-06 1962-01-04 Pipette perfectionnée
DE19621498968 DE1498968B2 (de) 1961-01-06 1962-01-05 Pipette
US32291663 US3247866A (en) 1961-01-06 1963-11-12 Pipette

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US8111661A 1961-01-06 1961-01-06
US32291663 US3247866A (en) 1961-01-06 1963-11-12 Pipette

Publications (1)

Publication Number Publication Date
US3247866A true US3247866A (en) 1966-04-26

Family

ID=26765214

Family Applications (2)

Application Number Title Priority Date Filing Date
US3118306D Expired - Lifetime US3118306A (en) 1961-01-06 Pipette
US32291663 Expired - Lifetime US3247866A (en) 1961-01-06 1963-11-12 Pipette

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US3118306D Expired - Lifetime US3118306A (en) 1961-01-06 Pipette

Country Status (4)

Country Link
US (2) US3247866A (de)
CH (1) CH392933A (de)
DE (1) DE1498968B2 (de)
GB (1) GB953937A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3584639A (en) * 1965-06-08 1971-06-15 Gasudarstuenny Nii Orch Polvpr Discrete-operating pneumatic element for logical function
US3889710A (en) * 1972-11-07 1975-06-17 Julien H Brost Check valve with elastomeric valve element
US4718629A (en) * 1985-06-26 1988-01-12 Dr. Ing. Rudolf Hell Gmbh Vacuum holding device
US6371117B1 (en) * 1998-06-15 2002-04-16 Siemens Elema Ab Directional valve
US20090211656A1 (en) * 2008-02-21 2009-08-27 Kao Hsung Tsung Changeover unit for fuel gas pressure reducer

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3203251A (en) * 1963-03-19 1965-08-31 Beckman Instruments Inc Pipette apparatus
US3590889A (en) * 1969-04-15 1971-07-06 Hamilton Co Injector filling apparatus
SE347355B (de) * 1970-11-12 1972-07-31 Aga Ab
US4091802A (en) * 1976-02-17 1978-05-30 Eastman Kodak Company Vented liquid collection device
USRE33564E (en) * 1981-12-14 1991-04-02 Ballard Medical Products Foam dispensing device
US5339988A (en) 1992-10-19 1994-08-23 Ballard Medical Products Disposable tray sump foamer, assembly and methods
RU2329101C2 (ru) * 2007-04-04 2008-07-20 Леонид Федорович Порядков Вентиль

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US194676A (en) * 1877-08-28 Improvement in sewer-traps
US797739A (en) * 1904-07-29 1905-08-22 Wilhelm Meer Valve.
US1594192A (en) * 1925-12-10 1926-07-27 Ross M Turner Vacuum valve
US1742400A (en) * 1926-06-19 1930-01-07 Larsson Johan Georg Separator for cream or similar liquids
US2508793A (en) * 1947-04-05 1950-05-23 Hays Mfg Co Flow control device
US2547377A (en) * 1944-12-19 1951-04-03 Juhasz Kalman John De Check valve device
US2650455A (en) * 1948-02-17 1953-09-01 Union Carbide & Carbon Corp Gas pressure regulator resistant to hum
GB818606A (en) * 1957-04-08 1959-08-19 Gaskell & Chambers Ltd Anti-drip delivery pipes for beer or other pumps
US3112846A (en) * 1959-12-21 1963-12-03 American Can Co Aerosol can package

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US555588A (en) * 1896-03-03 Valve for piping
US2311367A (en) * 1940-04-22 1943-02-16 Laura A Chambers Liquid applicator
US2540360A (en) * 1946-11-12 1951-02-06 George B Ulvild Pipette loader
US2466128A (en) * 1947-03-10 1949-04-05 Roy M Striegel Electrical extension cord assembly
US2655175A (en) * 1947-08-13 1953-10-13 Acme Prot Equipment Company Exhaust valve for gas masks
US2730270A (en) * 1953-06-29 1956-01-10 Harry B Heinemann Liquid measuring and dispensing device
US2728232A (en) * 1953-07-13 1955-12-27 Richard L Costello Pipette filling bulb
US2974528A (en) * 1957-04-11 1961-03-14 Manuel C Sanz Pipette

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US194676A (en) * 1877-08-28 Improvement in sewer-traps
US797739A (en) * 1904-07-29 1905-08-22 Wilhelm Meer Valve.
US1594192A (en) * 1925-12-10 1926-07-27 Ross M Turner Vacuum valve
US1742400A (en) * 1926-06-19 1930-01-07 Larsson Johan Georg Separator for cream or similar liquids
US2547377A (en) * 1944-12-19 1951-04-03 Juhasz Kalman John De Check valve device
US2508793A (en) * 1947-04-05 1950-05-23 Hays Mfg Co Flow control device
US2650455A (en) * 1948-02-17 1953-09-01 Union Carbide & Carbon Corp Gas pressure regulator resistant to hum
GB818606A (en) * 1957-04-08 1959-08-19 Gaskell & Chambers Ltd Anti-drip delivery pipes for beer or other pumps
US3112846A (en) * 1959-12-21 1963-12-03 American Can Co Aerosol can package

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3584639A (en) * 1965-06-08 1971-06-15 Gasudarstuenny Nii Orch Polvpr Discrete-operating pneumatic element for logical function
US3889710A (en) * 1972-11-07 1975-06-17 Julien H Brost Check valve with elastomeric valve element
US4718629A (en) * 1985-06-26 1988-01-12 Dr. Ing. Rudolf Hell Gmbh Vacuum holding device
US6371117B1 (en) * 1998-06-15 2002-04-16 Siemens Elema Ab Directional valve
US20090211656A1 (en) * 2008-02-21 2009-08-27 Kao Hsung Tsung Changeover unit for fuel gas pressure reducer

Also Published As

Publication number Publication date
US3118306A (en) 1964-01-21
GB953937A (en) 1964-04-02
DE1498968A1 (de) 1968-11-14
DE1498968B2 (de) 1971-02-11
CH392933A (de) 1965-05-31

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