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US917442A - Pipette attachment. - Google Patents

Pipette attachment. Download PDF

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Publication number
US917442A
US917442A US1908453344A US917442A US 917442 A US917442 A US 917442A US 1908453344 A US1908453344 A US 1908453344A US 917442 A US917442 A US 917442A
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US
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Grant
Patent type
Prior art keywords
pipette
body
tube
attachment
roller
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
Inventor
Albert Edward Hutchinson
Original Assignee
Albert Edward Hutchinson
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.)
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Publication date
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01LCHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/02Burettes; Pipettes
    • B01L3/021Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
    • B01L3/0213Accessories for glass pipettes; Gun-type pipettes, e.g. safety devices, pumps
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01LCHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/02Burettes; Pipettes
    • B01L3/021Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids

Description

A. E. HUTGHINSON.

PIPETTE ATTACHMENT.

APrLIoATIoN FILED JAN. 22, 1907. BENEWBD SEPT. 1e, 190s.

Patented Apr. 6, 1.909.

- /Nl/ENTOR L f zeff'jfuz/az ATTORNEYS rm: amers .versies co.. wAsHmcraN, n4 c.

UNITED sTATns ATnnT orario.

ALBERT EDWARD HUTCHINSON, OF VICTOR, COLORADO.

PIPETTE ATTACHMENT.

Application filed January 22, 1907, Serial No. 353,436. Renewed September 16, 1908.

Specification of Letters Patent.

Patented April 6, 1909.

Serial No. 453,344.

To all whom it may concern,.-

Be it known that I, ALBERT EDWARD HUToHINsoN, a citizen of the United States, and a resident of Victor, in the county of Teller and State of Colorado, have invented a new and Improved Pipette Attachment, of which the following is a full, clear, and exact description.

This invention is directed to improvements in pipette attachments, embodying a construction easily operable to draw into the pipette when ap lied thereto, any required quantity of liquid and eject the same when desired.

The operation of the attachment is such that the admission of the liquid to the pipette can be gaged with minuteness, making the invention particularly desirable in cases where precision is required.

Reference is to be had to the accompanyingl drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the fig- Figure l is a perspective view of one embodiment of my invention with a pipette applied thereto; Fig. 2 is a longitudinal, central, vertical section of the attachment to the upper portion of a pipette, and Fig. 3 is a cross section on the line 3-3 of Fig. 2 showing the roller in full.

The invention comprises a trough-like body composed of a base l with flanges 2 at each side thereof, said body being preferably constructed of sheet metal as illustrated. The flanges 2 are provided with alining, longitudinal slots 3 positioned a suitable distance from the base 1 and form bearings for trunnions 4 projecting from the ends of a roller 5, said roller preferably being knurled on its circumference and of such length as to neatly fit between the fianges. Placed between the base 1 of the trough-like body and the roller 5 is a rubber or other flexible tube 6, the lower end of which passes through a split clamp 7, preferably formed as an integral part of said body, and provided with paral el meeting portions 8 through which a thumb-nut 9, threaded into one of them, is passed. The clamp 7, under the action of the thumb-nut 9, binds the lower end of the tube about the uplper end of a pipette 1() placed therein, as 1 ustrated in Fig.

The diameter of the roller 5 is such that it will flatten the tube and press the inner walls thereof close together on rolling over it, as shown in 3. Itis obvious from this construction. that on placing the pipette in a liquid and grasping the trough-shaped body and roller, respectively, between the thumb and fore-finger and moving the roller upwardly, the suction caused by this action will carry the liquid within the pipette. As the movement of the roller may be carried on veryslowly, the quantity of liquid sucked into the pipette may be gaged with precision. On moving the roller 5 in the reverse direction, the liquid in the pipette is ejected.

Although I have described the construction and nature of the invention in detail, it is obvious that the same may be variously modied; and I consider that I am entitled to such modifications as fall within the scope of the appended claims.

Having thus described my invention I claim as new and desire to secure by Letters Patent:

1. A pipette attachment comprising a body, a fieXible tube seated on said body, an expansible clamp formed at one end of said body for detachably clamping the tube to the pipette, and a device longitudinally movable over said tube acting` to flatten it against said body, for the purpose described.

2. A pipette attachment comprising a trough-like body composed. of a base and side flanges rigidly connected together, a fieXible tube within said body, and a device longitudinally movable over said tube, in guide- Ways provided in said flanges, acting to flatten the tube against said base.

3. A pipette attachment comprising a trouglblike body composed of a base with side flanges, the latter being provided with longitudinal slots, a fieXible tube within said body, and a roller having trunnions projecting into said slots movable over said tube and acting to flatten it against said body.

4. A pipette attachment comprising a trough-like body made of sheet metal and composed of a base having flanges at each side thereof, said flanges being provided with longitudinal slots, a flexible tube arranged adjacent to said base, and a lmurled roller having trunnions projecting into said slots acting when movedv over said tube, to flatten it against said base.

5. A pipette attachment comprising a trough-like body having a split clamp formed as an integral part at one end thereof,

e 'flexible tube Within said body passing` through said clamp for receiving' one end of a pipette, means for drawing the clamp together to bind the tube about the ipette,

and e device longitudinally inovab e oyen said tube acting to Hatten it against said body, for the purpose described.

in testimony whereof 1 have signed my I name to this specification in the presence of l two subscribing Witnesses.

' ALBERT' EDWARD HU'ICHINSON. Witnesses:

S. A. HARKLEY, g B. F. ZIMMERMAN.

US917442A 1908-09-16 1908-09-16 Pipette attachment. Expired - Lifetime US917442A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US917442A US917442A (en) 1908-09-16 1908-09-16 Pipette attachment.

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US917442A US917442A (en) 1908-09-16 1908-09-16 Pipette attachment.

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US917442A true US917442A (en) 1909-04-06

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US917442A Expired - Lifetime US917442A (en) 1908-09-16 1908-09-16 Pipette attachment.

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2709024A (en) * 1951-03-17 1955-05-24 Lemoine Serge Device for the automatic delivery of fluid and pasty material incorporating automatic closing means
US2866340A (en) * 1955-09-06 1958-12-30 Goldberg Moshe Device for taking samples of liquid for testing
US2960868A (en) * 1957-12-23 1960-11-22 George E Price Pipette pump
US3786683A (en) * 1972-09-12 1974-01-22 Alphamedics Mfg Corp Hand-operated pipette
US3811603A (en) * 1968-04-15 1974-05-21 Hynson Westcott & Dunning Inc Dropper and stirrer dispensing a single drop
US4367754A (en) * 1979-04-02 1983-01-11 American Hospital Supply Corporation Method of dispensing a blood sample
US5114679A (en) * 1990-08-27 1992-05-19 Eastman Kodak Company Method of using a pipette
US5406856A (en) * 1991-12-17 1995-04-18 Eppendorf-Netheler Hinz Pipetting apparatus
US5445797A (en) * 1994-06-14 1995-08-29 Flesher; Robert W. Micro-pipettor assembly

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2709024A (en) * 1951-03-17 1955-05-24 Lemoine Serge Device for the automatic delivery of fluid and pasty material incorporating automatic closing means
US2866340A (en) * 1955-09-06 1958-12-30 Goldberg Moshe Device for taking samples of liquid for testing
US2960868A (en) * 1957-12-23 1960-11-22 George E Price Pipette pump
US3811603A (en) * 1968-04-15 1974-05-21 Hynson Westcott & Dunning Inc Dropper and stirrer dispensing a single drop
US3786683A (en) * 1972-09-12 1974-01-22 Alphamedics Mfg Corp Hand-operated pipette
US4367754A (en) * 1979-04-02 1983-01-11 American Hospital Supply Corporation Method of dispensing a blood sample
US5114679A (en) * 1990-08-27 1992-05-19 Eastman Kodak Company Method of using a pipette
US5406856A (en) * 1991-12-17 1995-04-18 Eppendorf-Netheler Hinz Pipetting apparatus
US5445797A (en) * 1994-06-14 1995-08-29 Flesher; Robert W. Micro-pipettor assembly

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