US1791829A - Sanitary attachment for pipettes - Google Patents
Sanitary attachment for pipettes Download PDFInfo
- Publication number
- US1791829A US1791829A US267998A US26799828A US1791829A US 1791829 A US1791829 A US 1791829A US 267998 A US267998 A US 267998A US 26799828 A US26799828 A US 26799828A US 1791829 A US1791829 A US 1791829A
- Authority
- US
- United States
- Prior art keywords
- cup
- pipette
- pipettes
- attachment
- tube
- 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
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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
- B01L3/021—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
- B01L3/0213—Accessories for glass pipettes; Gun-type pipettes, e.g. safety devices, pumps
-
- 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
Definitions
- My principali-aim is to generally improve upon structures of this class, by providing one whichis characterized by exceptional simplicity, and inexpensiveness, and which is such in construction as to better ulll the requirements of a deviceof thisclass.
- the invention is carried into effect in the .first application, through the medium of two different embodiments, each of which includes the commonfeature of an individual sanitary mouth-piece removably heldin op- -erative position.
- these 720 forms vof the invention, each embody an open-top cup carrying yan integral irreguf rlarly shaped stem and means for quick separable connection with the conventional measuring pipette.
- Figure 1 is a side elevational view of one embodiment of the invention', showing it attached to the pipette.
- Fig. 2 is a sectional view detailing the Vparts and their relative association more emphatically.
- Y 1 is a sectional view detailing the Vparts and their relative association more emphatically.
- Fig. 8 is a perspective view of the individual removable mouth-piece.
- Y v Fig. 4 is a View like Fig. 1, showing a diiierent embodiment of the invention.
- Fig. 5 isv a sectional view through the' principal part of this embodiment.
- Fig. 6 is a fragmentary sectional ⁇ and elevational view showing the method of use.
- the pipette is generally designated by the ref-k erence character" 7.
- This comprises an elongated container 8 having customary restricted discharge end 9, and a reduced tube 10 'at the top.
- V n y generally designatedby the? numeral ll'fand this includes a glassibody havinganopen top cup 12 equipped with atapered bottoni 13, and a vacuum release pipe 14.1 .'Ihelup-A 55 per endoffthis' pipe extendsV intothe cup" f and terminates belowthetop ofthe cup and above the ⁇ Vpoints shown.
- portion l'15 ⁇ is'- tapered, and adapted to receive a'rubber ⁇ V'sleeve-like.v coupling 16, whichas 60 shown in Fig. ⁇ 2, is"connected with thetube 10 ofthe pipett Extending from one side of the cup ⁇ adja-. cent the upper end of the pipe 14 is a hollow ward fbend 18-V forming a suspension hook, by means of whichthe attachment may be s ispended: from Vthe supporting nail or'the 1 e. i;
- YInpthis form ofthe invention @a taperedstopper 30 is provided, this having a central yopening thru which the tube 24' extends. 951A
- This stopper is locatedin the truncated bot'- tom portion 27' of the cup, as Yshown inthe assembled view in Fig. .4.
- Y,Attention is invited to vthe factthat'the .open bottom of the cup is of a Ydiameter to f 100 A thepipe :V 14 is formed integral with the cup 12.
- the cork ork rubber stopper 30, may be assembled on the,
- Vthe suction cup is not intended as ⁇ an overl flow, but as, ai convenient means for drawing Y the liquid into thepipette, andlthen releas-y ing it gradually by the linger asexplained.
- the cup is very small, andprovides a novel means of attachment for the'sanitary mouth piece.
- the entire structure' is comparatively inexpensive, yet highly eiiioient in use and operation.
- Y v he structure is dependable, compact and y convenient, and otherwise advantageous 'for 45 1 use in the 'capacity stated.
- v 1 In combination a pipette including a graduated container, a cup opened at ⁇ its top, a suction tube in (longitudinal alinement with said container and having one end thereof interiorly of lsaid cup tov facilitate the placingof the finger over the last. mentioned end of said suction tube to hold ⁇ or stem. y f
- a pipette including a ⁇ graduated container terminating ⁇ at one end into la suction tube, a cup opened at its top andhaving a truncated conical bottom porf tion,"l a ,tapered stopper fitted into the truntube to hold or discharge the liquid contents o said graduated container, said cup being formed on one side tliereof'with a hollow In testimony whereot ⁇ I affix signature.:
Description
Feb. l0, 1931. -RL F. MccRAcKAN v SANITARY` ATTACHMENT FOR PIPETTES Filed April 6. 1928 2 Sheets-Sheet l y In ventor eM @6km/rw;
Feb. l0, 1931. R. F. MccRAcKAN SANITARY ATTACHMENT FOR PIPETTES 2 Sheets-Sheet 2 Filed April 6. 1928 VPatented Feb. Y10, 1331 ROBERT r. lvmolteorinIv,4 or RICHMOND, VIRGINIA siiivlrrluzm ATTAGHMENT FOR rIIrE'r'IEs 1 applicati@ medi Abril e, 192s. serial no. 267,998.A
lThis invention-relates to a new applianceto v:be used in assoclation'with a liquid'm'eastiring-pipette, and itfhasV more particular reference to la structureof this class which is f 5 in the ormot a sanitaryattachmentvfor a conventionalform of pipette'. f Y
My principali-aim is to generally improve upon structures of this class, by providing one whichis characterized by exceptional simplicity, and inexpensiveness, and which is such in construction as to better ulll the requirements of a deviceof thisclass.
The invention is carried into efect in the .first application, through the medium of two different embodiments, each of which includes the commonfeature of an individual sanitary mouth-piece removably heldin op- -erative position.
Also, from a generic standpoint, these 720 forms vof the invention, each embody an open-top cup carrying yan integral irreguf rlarly shaped stem and means for quick separable connection with the conventional measuring pipette.
The other more specific features of construction willbecome more readily apparent from the ollowingdescription and drawings.
In the drawings Figure 1 is a side elevational view of one embodiment of the invention', showing it attached to the pipette.
Fig. 2 is a sectional view detailing the Vparts and their relative association more emphatically. Y 1
Fig. 8 is a perspective view of the individual removable mouth-piece. Y v Fig. 4 is a View like Fig. 1, showing a diiierent embodiment of the invention.
Fig. 5 isv a sectional view through the' principal part of this embodiment.
Fig. 6 is a fragmentary sectional `and elevational view showing the method of use.
Attention is first invited tofFigs. 1 -to 3 inclusive, wherein it will be observed that the pipette is generally designated by the ref-k erence character" 7. This comprises an elongated container 8 having customary restricted discharge end 9, and a reduced tube 10 'at the top.
The principal of the attachment isV n y generally designatedby the? numeral ll'fand this includes a glassibody havinganopen top cup 12 equipped with atapered bottoni 13, and a vacuum release pipe 14.1 .'Ihelup-A 55 per endoffthis' pipe extendsV intothe cup" f and terminates belowthetop ofthe cup and above the `Vpoints shown. The 'lower-end.;A .Y
portion l'15 `is'- tapered, and adapted to receive a'rubber` V'sleeve-like.v coupling 16, whichas 60 shown in Fig. `2, is"connected with thetube 10 ofthe pipett Extending from one side of the cup` adja-. cent the upper end of the pipe 14 is a hollow ward fbend 18-V forming a suspension hook, by means of whichthe attachment may be s ispended: from Vthe supporting nail or'the 1 e. i;
Connected'with the endJ portion. 19 .of them? stem is a VAcoupling 20 into the'opposite end.' of which the mouthpiece 21V lits.k It 'willv benoted .from-"Fig 3 thatv the mouth piecel has a tapered end'22 which-merely telescopes: into the'coupling20. j 'lhis is important in 7,5* that it -is desirable in a structure of this classA tovprovide individual sanitary mouth pieces, thus rendering .the invention more'des'irable for use by diflerent'rpersons.'v
It has of course been noted that l' Attention Yis now invited' to' `Figs.fl4 to"V 6 inclusive.V Here ythe pipette is designated bythe numeral 23, andV as is usual, itin-r 'cludes a reduced suction .tube 2,1, on its rtop 85 28, with which the coupling29 is connected, 901 the coupling to receive the aforesaidmouth Vpipe 21. .y Y
YInpthis form ofthe invention, @a taperedstopper 30 is provided, this having a central yopening thru which the tube 24' extends. 951A This stopper is locatedin the truncated bot'- tom portion 27' of the cup, as Yshown inthe assembled view in Fig. .4. Y,Attention is invited to vthe factthat'the .open bottom of the cup is of a Ydiameter to f 100 A thepipe :V 14 is formed integral with the cup 12.
permit the pipette 23 to be inserted downwardly therethrough. Thus, the cork ork rubber stopper 30, may be assembled on the,
\ With this arrangement,it is -obvious that Vthe suction cupis not intended as `an overl flow, but as, ai convenient means for drawing Y the liquid into thepipette, andlthen releas-y ing it gradually by the linger asexplained. The cup is very small, andprovides a novel means of attachment for the'sanitary mouth piece. The entire structure'is comparatively inexpensive, yet highly eiiioient in use and operation. Y v he structure is dependable, compact and y convenient, and otherwise advantageous 'for 45 1 use in the 'capacity stated.
The simplicity of the invention is such' as, to permit a clear understanding of the lsame to be hadfafter considering the description in connection with the drawings. VTherefore, a more; lengthy description is regarded iinnecessary. Y
Minor `changes in shape, size, andinate-v rials, and arrangement of parts, coming within the vfield ofinvention claimed may,-
be resorted to if desired;
I-Iaving thus described my invention, what I claim as new is v 1. In combination a pipette including a graduated container, a cup opened at `its top,a suction tube in (longitudinal alinement with said container and having one end thereof interiorly of lsaid cup tov facilitate the placingof the finger over the last. mentioned end of said suction tube to hold` or stem. y f
discharge the liquid contents of said' graduated container.
2. Ina device of thecharacter described,
and in combination, a pipette including a` graduated container terminating `at one end into la suction tube, a cup opened at its top andhaving a truncated conical bottom porf tion,"l a ,tapered stopper fitted into the truntube to hold or discharge the liquid contents o said graduated container, said cup being formed on one side tliereof'with a hollow In testimony whereot` I affix signature.:
ROBERTIF. MCCRACKANY.
ion
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US267998A US1791829A (en) | 1928-04-06 | 1928-04-06 | Sanitary attachment for pipettes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US267998A US1791829A (en) | 1928-04-06 | 1928-04-06 | Sanitary attachment for pipettes |
Publications (1)
Publication Number | Publication Date |
---|---|
US1791829A true US1791829A (en) | 1931-02-10 |
Family
ID=23021031
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US267998A Expired - Lifetime US1791829A (en) | 1928-04-06 | 1928-04-06 | Sanitary attachment for pipettes |
Country Status (1)
Country | Link |
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US (1) | US1791829A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2692503A (en) * | 1952-07-09 | 1954-10-26 | Owens Illinois Glass Co | Pipette |
US2737812A (en) * | 1952-06-23 | 1956-03-13 | Paul O K Haak | Pipette |
US2994349A (en) * | 1957-10-29 | 1961-08-01 | Peter T Demos | Pipette control device |
US3734358A (en) * | 1971-07-27 | 1973-05-22 | Gen Electric | Means for applying suction having automatic cutoff of displacement volume |
US3938392A (en) * | 1970-01-16 | 1976-02-17 | Rodrigues Associates, Inc. | Pipette |
FR2411031A1 (en) * | 1977-12-07 | 1979-07-06 | Hoffmann La Roche | PIPETTE SHUTTER |
US5218875A (en) * | 1992-01-13 | 1993-06-15 | Volpe Stephen J | Combination glass/plastic pipet tip assembly |
-
1928
- 1928-04-06 US US267998A patent/US1791829A/en not_active Expired - Lifetime
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2737812A (en) * | 1952-06-23 | 1956-03-13 | Paul O K Haak | Pipette |
US2692503A (en) * | 1952-07-09 | 1954-10-26 | Owens Illinois Glass Co | Pipette |
US2994349A (en) * | 1957-10-29 | 1961-08-01 | Peter T Demos | Pipette control device |
US3938392A (en) * | 1970-01-16 | 1976-02-17 | Rodrigues Associates, Inc. | Pipette |
US3734358A (en) * | 1971-07-27 | 1973-05-22 | Gen Electric | Means for applying suction having automatic cutoff of displacement volume |
FR2411031A1 (en) * | 1977-12-07 | 1979-07-06 | Hoffmann La Roche | PIPETTE SHUTTER |
US5218875A (en) * | 1992-01-13 | 1993-06-15 | Volpe Stephen J | Combination glass/plastic pipet tip assembly |
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