US3720354A - Dispensing micropipette apparatus having disposable parts - Google Patents
Dispensing micropipette apparatus having disposable parts Download PDFInfo
- Publication number
- US3720354A US3720354A US00075203A US3720354DA US3720354A US 3720354 A US3720354 A US 3720354A US 00075203 A US00075203 A US 00075203A US 3720354D A US3720354D A US 3720354DA US 3720354 A US3720354 A US 3720354A
- Authority
- US
- United States
- Prior art keywords
- tubular member
- plunger member
- holder
- plunger
- sectional area
- 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
Links
Images
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
- B01L3/021—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
- B01L3/0217—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids of the plunger pump type
- B01L3/022—Capillary pipettes, i.e. having very small bore
Definitions
- ABSTRACT This invention is a dispensing micropipette apparatus having disposable parts, which apparatus includes a capillary tube into which fluid is drawn in the desired amount by a wire plunger.
- the upper end of the wire plunger is releasably secured by spring means to a holder which includes a finger loop for operating the wire 'plunger axially withinthe capillary tube, for drawing fluid into, and dispensing fluid from, the apparatus in a one-handed operation.
- the tube and plunger contaminated by the fluid may then be dropped from the holder by operation of the spring means.
- a further object is to provide a dispensing micropipette apparatus wherein the wire plunger is releasably held in the holder by a spring member, the spring member being operated to release the plunger and micropipette from the holder for disposal after use, or in the event the micropipette becomes broken, release being effected without touching the plunger or micropipette, thereby preventing contaminating the user with the fluid drawn into the micropipette.
- a still further object is to provide a dispensing micropipette apparatus employing a minimum of simple, low-cost parts, which are readily assembled for use.
- FIG. l is an enlarged fragmentary perspective view of the dispensing micropipette apparatus of the present invention, illustrating its use;
- FIG. 2 is a fragmentary side elevational view of the same
- FIG. 3 is a sectional view taken along the line 3-3 of FIG. 2, looking in the direction of the arrows;
- FIG. 4 is a fragmentary perspective view of the spring member and wire plunger forming a part of the present invention, illustrating their manner of interengagement;
- FIG. 5 is an enlarged longitudinal sectional view of a wire plunger and capillary tube forming a part of the present invention
- FIG. 6 is a perspective view illustrating the manner of release of the wire plunger and capillary tube from the holder after use
- FIG. 7 is an enlarged sectional view similar to FIG. 5, illustrating a modified form of the invention for use with a different sized capillary tube.
- the apparatus of the present invention generally includes a holder unit ll] to which is attached filling and dispensing unit 112.
- holder unit 10 includes a generally rectangular body 14, one end of which issues into a finger-engaging loop 16.
- Body 14 is provided with a central longitudinal bore 18 which communicates with a cut-out section 20.
- a substantially Z-shaped spring member generally designated 22 is secured to body 14 by a screw 24.
- Z-shaped member 22 includes a substantially flat portion 26, a part of which is held in contiguous relationship with body portion 14 by a screw 24.
- a central part of portion 26 is provided with an opening 28 to lend greater resiliency to the spring.
- a terminal of portion 26 issues into an angular or sloping portion 30 which extends through cut-out section 20 of of body 14 at approximately a 45 angle to portion 26.
- Angular portion 30 is provided with a circular opening 32 which is in alignment with longitudinal bore 18 of body 14.
- angular portion 30 then issues into a flat spring plate 34 which lies in spaced, substantially parallel relationship to holder unit 10 and to flat portion 26.
- Filling and dispensing unit 12 includes a precision capillary tube 36 having one or more graduations 38 marked thereon.
- a wire plunger 40 is positioned within capillary tube 36 for longitudinal movement with respect thereto, for the purpose of admitting fluid to, and dispensing fluid from, capillary tube 36.
- wire plunger 40 is of smaller diameter than the internal diameter of capillary tube 36. Therefore, one terminal of wire plunger 40 is provided with a coating 42 of Teflon or other suitable material, the outer periphery of which engages the internal wall of capillary tube 36, to effect drawing of fluid into, and dispensing liquid from, tube 36.
- a peripheral annular recess 44 Adjacent the opposite terminal of wire plunger 40 is a peripheral annular recess 44 which, upon insertion of wire plunger 40 through longitudinal bore 18 of body 14, is engaged by that portion of member 30 forming circular opening 32, for holding the wire plunger in the bore under urging of Z-shaped spring member 22.
- the dispensing unit thereof is grasped by four fingers of the hand, with the index finger extending through loop 16 of holder unit 10 as shown in FIG. 1.
- wire plunger 40 may be moved longitudinally through capillary tube 36 to draw fluid into the tube.
- the amount of fluid drawn into the tube may be accurately controlled by movement of the index finger.
- the fluid may then be dispensed from the tube by movement of the index finger held within the loop, in the opposite direction.
- precise amounts of fluid may be dispensed from the capillary tube by virtue of the controlled movement of the wire plunger with one finger. 4
- FIG. 7 there has been illustrated a modified form of apparatus wherein a capillary tube 46 of smaller capacity is employed.
- wire plunger 48 is passed through capillary tube 46, the wire plunger being of substantially the same diameter as the diameter of the bore of capillary tube 46. Therefore, no tip member is required at the end of wire plunger 48, and fluid is drawn into and dispensed from, capillary tube 46 simply by longitudinal movement of the wire plunger with respect to the capillary tube.
- a dispensing micropipette apparatus including a. an elongated tubular member,
- At least a portion of said plunger member being of substantially the same cross-sectional area as the internal cross-sectional area of said elongated tubular member, whereby fluid may be drawn into, and dispensed from, said tubular member, by movement of said plunger member through said tubular member, and
- said holder including a body portion having a central cut out section
- said holder further being provided with a longitudinal bore in communication with said out out section, through which bore and cut out section said plunger member is pushed,
- the intermediate part of said Z-shaped spring being provided with an opening through which an end of said plunger member passes
- said holder further including finger-engaging means for facilitating movement of said plunger member through said tubular member.
- said plunger member is provided with an annular recess adjacent one end thereof,
- a dispensing micropipette apparatus including:
- At least a portion of said plunger member being of substantially the same cross-sectional area as the internal cross-sectional area of said elongated tubular member, whereby fluid may be drawn into, and dispensed from, said tubular member, by movement of said plunger member longitudinally through said tubular member,
- said holder being provided with finger engaging means for facilitating movement of said plunger member through said tubular member
- said holder including a body portion provided with a bore for the reception of said plunger member, and
- spring means carried by said holder and engageable with said plunger member for retaining the latter in said holder.
- a dispensing micropipette apparatus including:
- At least a portion of said plunger member being of substantially the same cross-sectional area as the internal cross-sectional area of said elongated tubular member and in frictional engagement therewith, whereby fluid may be drawn into and dispensed from said tubular member,
- said holder being provided with finger engaging means for facilitating movement of said plunger member through said tubular member
- said finger-engaging means comprises a loop through which a finger passes to effect one-handed operation of the apparatus.
- said plunger member is provided with a tip of substantially the same cross-sectional area as the internal cross-sectional area of said elongated tubular member for frictionally engaging the walls of the latter to effect the drawing of fluid into, and dispensing fluid from said tubular member.
Landscapes
- Health & Medical Sciences (AREA)
- Clinical Laboratory Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Devices For Use In Laboratory Experiments (AREA)
Abstract
This invention is a dispensing micropipette apparatus having disposable parts, which apparatus includes a capillary tube into which fluid is drawn in the desired amount by a wire plunger. The upper end of the wire plunger is releasably secured by spring means to a holder which includes a finger loop for operating the wire plunger axially within the capillary tube, for drawing fluid into, and dispensing fluid from, the apparatus in a one-handed operation. The tube and plunger contaminated by the fluid may then be dropped from the holder by operation of the spring means.
Description
United States Patent; 11 1 Druminond et al.-
1 11 3,720,354 1 1March 13, 1973 DISPENSING MICROPIPETTE APPARATUS HAVING DISPOSABLE PARTS [75] Inventors: Michael E. Drummond, West Chester; John E. Robinson, Springfield, both ofPa,
[73] Assignee: Drummond Instrument Company,
v Broomall, Pa. 22 Filed Sept. 24, 1970 211 Appl.No.: 75,203
1521' user ..222/386 51] Int.Cl ..c01r11/0o 58 Field ofSearch ..141/2s-27;
[56] References Cited UNITED STATES PATENTS Johnson ..l28/218 C X Drummond et a1. "128/218 C X 9/1968 Harris ..128/2l8 C 3,525,264 8/1970 Nieglos et a1. ..73/425.6 1,156,240 10/1915 McKay ...73/425.6 X 2,863,319 12/1958 McLin ..73/425.4 P
Primary Examiner-Robert B. Reeves Assistant ExaminerJohn P. Shannon Att0rneyShlesin'ger, Arkwright & Garvey [57] ABSTRACT This invention is a dispensing micropipette apparatus having disposable parts, which apparatus includes a capillary tube into which fluid is drawn in the desired amount by a wire plunger. The upper end of the wire plunger is releasably secured by spring means to a holder which includes a finger loop for operating the wire 'plunger axially withinthe capillary tube, for drawing fluid into, and dispensing fluid from, the apparatus in a one-handed operation. The tube and plunger contaminated by the fluid may then be dropped from the holder by operation of the spring means.
10 Claims, 7 Drawing Figures PATENTEDMAR 1 3197s SHEET 1 or 2 INVENTORS MICHAEL E. DRUMMOND JOHN E. ROBINSON si/ w mg FIG! fl ATTORNEYS PATENTEUHARIBISYS 3,720,354
' SHEET 2 0r 2 42 FIG. 5
INVENTORS MICHAEL E. DRUMMOND JOHN E. ROBlNSON ATTORNEYS DISPENSING MICROPIPETTE APPARATUS HAVING DISPOSABLE PARTS OBJECTS OF THE INVENTION A further object is to provide a dispensing micropipette apparatus wherein the wire plunger is releasably held in the holder by a spring member, the spring member being operated to release the plunger and micropipette from the holder for disposal after use, or in the event the micropipette becomes broken, release being effected without touching the plunger or micropipette, thereby preventing contaminating the user with the fluid drawn into the micropipette.
A still further object is to provide a dispensing micropipette apparatus employing a minimum of simple, low-cost parts, which are readily assembled for use.
Other objects will be apparent from the following description of the presently preferred form of the present invention taken in connection with the appended drawings.
DESCRIPTION OF FIGURES OF DRAWINGS FIG. l is an enlarged fragmentary perspective view of the dispensing micropipette apparatus of the present invention, illustrating its use;
FIG. 2 is a fragmentary side elevational view of the same;
FIG. 3 is a sectional view taken along the line 3-3 of FIG. 2, looking in the direction of the arrows;
FIG. 4 is a fragmentary perspective view of the spring member and wire plunger forming a part of the present invention, illustrating their manner of interengagement;
FIG. 5 is an enlarged longitudinal sectional view of a wire plunger and capillary tube forming a part of the present invention;
- FIG. 6 is a perspective view illustrating the manner of release of the wire plunger and capillary tube from the holder after use, and
FIG. 7 is an enlarged sectional view similar to FIG. 5, illustrating a modified form of the invention for use with a different sized capillary tube.
DESCRIPTION OF FIGS. 1 TO 6 The apparatus of the present invention generally includes a holder unit ll] to which is attached filling and dispensing unit 112.
As shown to advantage in FIGS. 1 to 3, holder unit 10 includes a generally rectangular body 14, one end of which issues into a finger-engaging loop 16. Body 14 is provided with a central longitudinal bore 18 which communicates with a cut-out section 20.
A substantially Z-shaped spring member generally designated 22 is secured to body 14 by a screw 24. As shown to advantage in FIG. 4, Z-shaped member 22 includes a substantially flat portion 26, a part of which is held in contiguous relationship with body portion 14 by a screw 24. A central part of portion 26 is provided with an opening 28 to lend greater resiliency to the spring.
A terminal of portion 26 issues into an angular or sloping portion 30 which extends through cut-out section 20 of of body 14 at approximately a 45 angle to portion 26. Angular portion 30 is provided with a circular opening 32 which is in alignment with longitudinal bore 18 of body 14.
The free terminal of angular portion 30 then issues into a flat spring plate 34 which lies in spaced, substantially parallel relationship to holder unit 10 and to flat portion 26.
Filling and dispensing unit 12 includes a precision capillary tube 36 having one or more graduations 38 marked thereon. A wire plunger 40 is positioned within capillary tube 36 for longitudinal movement with respect thereto, for the purpose of admitting fluid to, and dispensing fluid from, capillary tube 36. In the form of invention illustrated in FIGS. 1 to 5, wire plunger 40 is of smaller diameter than the internal diameter of capillary tube 36. Therefore, one terminal of wire plunger 40 is provided with a coating 42 of Teflon or other suitable material, the outer periphery of which engages the internal wall of capillary tube 36, to effect drawing of fluid into, and dispensing liquid from, tube 36.
Adjacent the opposite terminal of wire plunger 40 is a peripheral annular recess 44 which, upon insertion of wire plunger 40 through longitudinal bore 18 of body 14, is engaged by that portion of member 30 forming circular opening 32, for holding the wire plunger in the bore under urging of Z-shaped spring member 22.
OPERATION In use of the apparatus of the present invention, the dispensing unit thereof is grasped by four fingers of the hand, with the index finger extending through loop 16 of holder unit 10 as shown in FIG. 1. By movement of the index finger, wire plunger 40 may be moved longitudinally through capillary tube 36 to draw fluid into the tube. The amount of fluid drawn into the tube may be accurately controlled by movement of the index finger. I
The fluid may then be dispensed from the tube by movement of the index finger held within the loop, in the opposite direction. Here again, precise amounts of fluid may be dispensed from the capillary tube by virtue of the controlled movement of the wire plunger with one finger. 4
It is a salient feature of the present invention that after the tube and plunger have been contaminated by the fluid, these parts may be easily removed from holder unit 10 for disposal in a single-handed operation in the manner illustrated in FIG. 6. In carrying out this operation, flat spring plate 34 is engaged by the thumb to disengage the spring from the wire plunger 40, thereby permitting the latter to gravitate from its position within holder unit 10, for disposal. This same procedure is also followed in the event that the capillary tube becomes broken during use.
FORM OF THE INVENTION ILLUSTRATED IN FIG. 7
In FIG. 7, there has been illustrated a modified form of apparatus wherein a capillary tube 46 of smaller capacity is employed. In this form of the invention, wire plunger 48 is passed through capillary tube 46, the wire plunger being of substantially the same diameter as the diameter of the bore of capillary tube 46. Therefore, no tip member is required at the end of wire plunger 48, and fluid is drawn into and dispensed from, capillary tube 46 simply by longitudinal movement of the wire plunger with respect to the capillary tube.
While there has been herein shown and described the presently preferred forms of the present invention, it is to be understood that such has been done for purposes of illustration only, and that various changes may be made therein within the scope of the claims hereto appended.
What we claim is:
l. A dispensing micropipette apparatus including a. an elongated tubular member,
b. a plunger member extending longitudinally through said tubular member,
. at least a portion of said plunger member being of substantially the same cross-sectional area as the internal cross-sectional area of said elongated tubular member, whereby fluid may be drawn into, and dispensed from, said tubular member, by movement of said plunger member through said tubular member, and
. a holder engageable with one end of said plunger member,
. said holder including a body portion having a central cut out section,
f. said holder further being provided with a longitudinal bore in communication with said out out section, through which bore and cut out section said plunger member is pushed,
a substantially Z-shaped spring fixed at one end to said body portion,
h. an intermediate part of said Z-shaped spring extending through the cut-out portion of said body portion,
. the intermediate part of said Z-shaped spring being provided with an opening through which an end of said plunger member passes,
j. whereby a portion of said Z-shaped spring defining the opening engages the plunger member for frictionally holding the latter in said holder,
said holder further including finger-engaging means for facilitating movement of said plunger member through said tubular member.
2. The dispensing micropipette apparatus of claim 1, wherein a. said finger-engaging means comprises a loop through which a finger passes to effect one-handed operation of the apparatus.
3. The dispensing micropipette apparatus of claim 2,
wherein a. said plunger member is provided with an annular recess adjacent one end thereof,
b. the annular recess being engaged by that portion of the intermediate part of said Z-shaped spring defining the opening to preclude accidental longitudinal movement of said plunger member with respect to said holder.
4. The apparatus of claim 3, wherein said plunger member is provided with a tip of substantially the same cross-sectional area as the internal cross-sectional area of said elongated tubular member.
. The apparatus of claim 3, wherein the cross-sectional area of said plunger member throughout its length is the same as the internal cross-sectional area of said elongated tubular member.
. A dispensing micropipette apparatus including:
. an elongated tubular member,
a plunger member extending longitudinally through said tubular member,
. at least a portion of said plunger member being of substantially the same cross-sectional area as the internal cross-sectional area of said elongated tubular member, whereby fluid may be drawn into, and dispensed from, said tubular member, by movement of said plunger member longitudinally through said tubular member,
. a holder engageable with one end of said plunger member,
. said holder being provided with finger engaging means for facilitating movement of said plunger member through said tubular member,
f. said holder including a body portion provided with a bore for the reception of said plunger member, and
. spring means carried by said holder and engageable with said plunger member for retaining the latter in said holder.
. A dispensing micropipette apparatus including:
. an elongated tubular member,
a plunger member extending longitudinally through said tubular member,
. at least a portion of said plunger member being of substantially the same cross-sectional area as the internal cross-sectional area of said elongated tubular member and in frictional engagement therewith, whereby fluid may be drawn into and dispensed from said tubular member,
. a holder engageable with one end of said plunger member,
. said holder being provided with finger engaging means for facilitating movement of said plunger member through said tubular member,
f. means carried by said holder for normally gripping said plunger member, and
means engageable with said means gripping said plunger member for releasing said plunger member and the tubular member in frictional engagement therewith, for disposal.
8. The dispensing micropipette apparatus of claim 7,
wherein:
a. said finger-engaging means comprises a loop through which a finger passes to effect one-handed operation of the apparatus.
9. The dispensing micropipette apparatus of claim 7,
wherein:
a. said plunger member is provided with a tip of substantially the same cross-sectional area as the internal cross-sectional area of said elongated tubular member for frictionally engaging the walls of the latter to effect the drawing of fluid into, and dispensing fluid from said tubular member.
10. The dispensing apparatus of claim 7, wherein:
a.- the cross-sectional area of said plunger member throughout its length is the same as the internal cross-sectional area of said elongated tubular member.
Claims (10)
1. A dispensing micropipette apparatus including a. an elongated tubular member, b. a plunger member extending longitudinally through said tubular member, c. at least a portion of said plunger member being of substantially the same cross-sectional area as the internal cross-sectional area of said elongated tubular member, whereby fluid may be drawn into, and dispensed from, said tubular member, by movement of said plunger member through said tubular member, and d. a holder engageable with one end of said plunger member, e. said holder including a body portion having a central cut out section, f. said holder further being provided with a longitudinal bore in communication with said cut out section, through which bore and cut out section said plunger member is pushed, g. a substantially Z-shaped spring fixed at one end to said body portion, h. an intermediate part of said Z-shaped spring extending through the cut-out portion of said body portion, i. the intermediate part of said Z-shaped spring being provided with an opening through which an end of said plunger member passes, j. whereby a portion of said Z-shaped spring defining the opening engages the plunger member for frictionally holding the latter in said holder, k. said holder further including finger-engaging means for facilitating movement of said plunger member through said tubular member.
1. A dispensing micropipette apparatus including a. an elongated tubular member, b. a plunger member extending longitudinally through said tubular member, c. at least a portion of said plunger member being of substantially the same cross-sectional area as the internal cross-sectional area of said elongated tubular member, whereby fluid may be drawn into, and dispensed from, said tubular member, by movement of said plunger member through said tubular member, and d. a holder engageable with one end of said plunger member, e. said holder including a body portion having a central cut out section, f. said holder further being provided with a longitudinal bore in communication with said cut out section, through which bore and cut out section said plunger member is pushed, g. a substantially Z-shaped spring fixed at one end to said body portion, h. an intermediate part of said Z-shaped spring extending through the cut-out portion of said body portion, i. the intermediate part of said Z-shaped spring being provided with an opening through which an end of said plunger member passes, j. whereby a portion of said Z-shaped spring defining the opening engages the plunger member for frictionally holding the latter in said holder, k. said holder further including finger-engaging means for facilitating movement of said plunger member through said tubular member.
2. The dispensing micropipette apparatus of claim 1, wherein a. said finger-engaging means comprises a loop through which a finger passes to effect one-handed operation of the apparatus.
3. The dispensing micropipette apparatus of claim 2, wherein a. said plunger member is provided with an annular recess adjacent one end thereof, b. the annular recess being engaged by that portion of the intermediate part of said Z-shaped spring defining the opening to preclude accidental longitudinal movement of said plunger member with respect to said holder.
4. The apparatus of claim 3, wherein a. said plunger member is provided with a tip of substantially the same cross-sectional area as the internal cross-sectional area of said elongated tubular member.
5. The apparatus of claim 3, wherein a. the cross-sectional area of said plunger member throughout its length is the same as the internal cross-sectional area of said elongated tubular member.
6. A dispensing micropipette apparatus including: a. an elongated tubular member, b. a plunger member extending longitudinally through said tubular member, c. at least a portion of said plunger member being of substantially the same cross-sectional area as the internal cross-sectional area of said elongated tubular member, whereby fluid may be drawn into, and dispensed from, said tubular member, by movement of said plunger member longitudinally through said tubular member, d. a holder engageable with one end of said plunger member, e. said holder being provided with finger engaging means for facilitating movement of said plunger member through said tubular member, f. said holder including a body portion provided with a bore for the reception of said plunger member, and g. spring means carried by said holder and engageable with said plunger member for retaining the latter in said holder.
7. A dispensing micropipette apparatus including: a. an elongated tubular member, b. a plunger member extending longitudinally through said tubular member, c. at least a portion of said plunger member being of substantially the same cross-sectional area as the internal cross-sectional area of said elongated tubular member and in frictional engagement therewith, whereby fluid may be drawn into and dispensed from said Tubular member, d. a holder engageable with one end of said plunger member, e. said holder being provided with finger engaging means for facilitating movement of said plunger member through said tubular member, f. means carried by said holder for normally gripping said plunger member, and g. means engageable with said means gripping said plunger member for releasing said plunger member and the tubular member in frictional engagement therewith, for disposal.
8. The dispensing micropipette apparatus of claim 7, wherein: a. said finger-engaging means comprises a loop through which a finger passes to effect one-handed operation of the apparatus.
9. The dispensing micropipette apparatus of claim 7, wherein: a. said plunger member is provided with a tip of substantially the same cross-sectional area as the internal cross-sectional area of said elongated tubular member for frictionally engaging the walls of the latter to effect the drawing of fluid into, and dispensing fluid from said tubular member.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US7520370A | 1970-09-24 | 1970-09-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3720354A true US3720354A (en) | 1973-03-13 |
Family
ID=22124221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US00075203A Expired - Lifetime US3720354A (en) | 1970-09-24 | 1970-09-24 | Dispensing micropipette apparatus having disposable parts |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3720354A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0147628A2 (en) * | 1984-01-05 | 1985-07-10 | Drummond Scientific Company | Disposable capillary tube device |
| US5454491A (en) * | 1993-08-30 | 1995-10-03 | World Precision Instruments, Inc. | Non-metallic precision fluid transfer devices |
| EP0992577A1 (en) * | 1998-06-05 | 2000-04-12 | Lummel, Wolfgang | Process for microinjection and nanopipette for introducing an injection product, particularly foreign genetic material in procaryotic or eucaryotic cells or cellcomparments thereof (plastides, cell nucleus) |
| US20050098587A1 (en) * | 2003-11-10 | 2005-05-12 | Garry Tsaur | Fingertip pusher |
| US20060103849A1 (en) * | 2004-11-16 | 2006-05-18 | Zhenghua Ji | Apparatus and methods for evaluating an optical property of a liquid sample |
| US20070081159A1 (en) * | 2005-10-11 | 2007-04-12 | Giffin Kristin M | Apparatus and methods for evaluating an optical property of a liquid sample |
| US20070201021A1 (en) * | 2005-09-13 | 2007-08-30 | Schembri Carol T | Modular cuvettes and methods for use thereof |
| WO2019185122A1 (en) * | 2018-03-27 | 2019-10-03 | MAX-PLANCK-Gesellschaft zur Förderung der Wissenschaften e.V. | Syringe device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1156240A (en) * | 1914-08-10 | 1915-10-12 | George L Mckay | Liquid-sampling device. |
| US2863319A (en) * | 1958-02-04 | 1958-12-09 | Mclin Marvin Hampton | Capillary pipette |
| US3153496A (en) * | 1961-11-20 | 1964-10-20 | Barber Colman Co | Syringe |
| US3401692A (en) * | 1964-06-26 | 1968-09-17 | Micro Tek Instr Corp | Syringe provided with a lateral vent and having high compression seals within the syringe bore |
| US3525264A (en) * | 1968-04-05 | 1970-08-25 | Becton Dickinson Co | Micropipette holder |
| US3606086A (en) * | 1969-11-10 | 1971-09-20 | Drummond Instr Co | Microdispensing device |
-
1970
- 1970-09-24 US US00075203A patent/US3720354A/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1156240A (en) * | 1914-08-10 | 1915-10-12 | George L Mckay | Liquid-sampling device. |
| US2863319A (en) * | 1958-02-04 | 1958-12-09 | Mclin Marvin Hampton | Capillary pipette |
| US3153496A (en) * | 1961-11-20 | 1964-10-20 | Barber Colman Co | Syringe |
| US3401692A (en) * | 1964-06-26 | 1968-09-17 | Micro Tek Instr Corp | Syringe provided with a lateral vent and having high compression seals within the syringe bore |
| US3525264A (en) * | 1968-04-05 | 1970-08-25 | Becton Dickinson Co | Micropipette holder |
| US3606086A (en) * | 1969-11-10 | 1971-09-20 | Drummond Instr Co | Microdispensing device |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0147628A2 (en) * | 1984-01-05 | 1985-07-10 | Drummond Scientific Company | Disposable capillary tube device |
| EP0147628A3 (en) * | 1984-01-05 | 1987-02-04 | Drummond Scientific Company | Disposable capillary tube device |
| US5454491A (en) * | 1993-08-30 | 1995-10-03 | World Precision Instruments, Inc. | Non-metallic precision fluid transfer devices |
| EP0992577A1 (en) * | 1998-06-05 | 2000-04-12 | Lummel, Wolfgang | Process for microinjection and nanopipette for introducing an injection product, particularly foreign genetic material in procaryotic or eucaryotic cells or cellcomparments thereof (plastides, cell nucleus) |
| US6063629A (en) * | 1998-06-05 | 2000-05-16 | Wolfgang Lummel | Microinjection process for introducing an injection substance particularly foreign, genetic material, into procaryotic and eucaryotic cells, as well as cell compartments of the latter (plastids, cell nuclei), as well as nanopipette for the same |
| US20050098587A1 (en) * | 2003-11-10 | 2005-05-12 | Garry Tsaur | Fingertip pusher |
| US20060103849A1 (en) * | 2004-11-16 | 2006-05-18 | Zhenghua Ji | Apparatus and methods for evaluating an optical property of a liquid sample |
| US7224448B2 (en) | 2004-11-16 | 2007-05-29 | Agilent Technologies, Inc. | Apparatus and methods for evaluating an optical property of a liquid sample |
| US20070201021A1 (en) * | 2005-09-13 | 2007-08-30 | Schembri Carol T | Modular cuvettes and methods for use thereof |
| US7277167B2 (en) | 2005-09-13 | 2007-10-02 | Agilent Technologies, Inc. | Modular cuvettes and methods for use thereof |
| US20070081159A1 (en) * | 2005-10-11 | 2007-04-12 | Giffin Kristin M | Apparatus and methods for evaluating an optical property of a liquid sample |
| WO2019185122A1 (en) * | 2018-03-27 | 2019-10-03 | MAX-PLANCK-Gesellschaft zur Förderung der Wissenschaften e.V. | Syringe device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3855867A (en) | Liquid transfer pipetting device | |
| US3985032A (en) | Micropipette filter tips | |
| US5104624A (en) | Pipetter | |
| US4813871A (en) | Dental viscous material dispenser | |
| US3828987A (en) | Dispensing micropipette apparatus having disposable parts for delivering a preselected quantity of fluid | |
| US2952255A (en) | Controlled dosage syringe | |
| US4091812A (en) | Operator means for syringe cartridges | |
| US4099548A (en) | Hand-held pipette for repetitively dispensing precise volumes of liquid | |
| US3853012A (en) | Pipettes | |
| US3819091A (en) | Syringe appliance | |
| US5288285A (en) | Holder for filling syringe with radioactive liquid | |
| US2474496A (en) | Syringe | |
| US3949748A (en) | Injection syringe having aspirating and metering capabilities | |
| US4174048A (en) | Tablet retaining and dispensing device | |
| US4364388A (en) | Syringe dispensing apparatus | |
| US3720354A (en) | Dispensing micropipette apparatus having disposable parts | |
| IE43550B1 (en) | Measuring and pipetting device | |
| US4378333A (en) | Device for preparing blood smears on glass slides and method therefor | |
| US3954014A (en) | Multiple shot pipetter | |
| DE6913778U (en) | PIPETTING DEVICE. | |
| US5807524A (en) | Pipette tip with pipette surface contamination protector | |
| US3017879A (en) | Fertility tester | |
| EP0496784B1 (en) | Pipetter | |
| USRE27645E (en) | Microdispensing device | |
| US3945254A (en) | Multiple shot pipetter |