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Publication numberUS2097571 A
Publication typeGrant
Publication dateNov 2, 1937
Filing dateAug 26, 1935
Priority dateAug 26, 1935
Publication numberUS 2097571 A, US 2097571A, US-A-2097571, US2097571 A, US2097571A
InventorsJames J Moran
Original AssigneeKimble Glass Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 2097571 A
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Description  (OCR text may contain errors)

Nov. 2, 1937. J, J MORAN 2,097,571

Filed Aug. 26, 1935 INVENTOR I JHMES J. MoRHIV ATTORNEY Patented Nov. 2, 1937 UNITED STATES PATENT oFFiE PIPETTE James J. Moran, Drexel Hill, Pah, assignor to Kimble Glass Company, Vineland, N. J a corporation of Illinois Application August 26,1935, Serial No. 37,907

1 Claim.

This invention relates to pipettes and has as a primary object the provision of means for protecting a pipette against breakage during use of the pipette in transferring samples to test bottles.

A further object of this invention is to provide protecting means of the above mentioned character which will be simple in construction and which will render the pipette more easy to use.

Numerous other objects and advantages of this invention will become more apparent as the following description proceeds particularly when reference is had to the accompanying drawing wherein Fig. 1 is a perspective view of a pipette showing the invention applied to the same, the pipette 5 wherein like reference characters designate corresponding parts throughout all views, the numeral l 3 designates generally a pipette. This pipette is of general construction in that it includes a discharge stem ll, an enlarged body portionlZ, and a tubular extension I3 formed on the upper end of the body portion, this extension being provided with the usual line l4 indicating the level to which the pipette should be filled. As is customary, the lower end of the. body portion l2 of the pipette is of conical shape adjacent its juncture with the stem H.

The numeral [5 designates generally a test bottle of usual construction, this bottle including a body portion [6 and an elongated neck portion ll provided with suitable graduations it. The neck portion terminates at its open end in an outwardly flared portion I9 to facilitate the insertion of the stem of the pipette into the test bottle.

In use, it will be understood that the pipette is adapted for the transferring of samples to be tested to the test bottle. Thus for example, in the Babcock test for determining the cream in milk or the butterfat in cream, the desired quantity of the milk or cream to be tested is trapped in the pipette and. then the pipette stem is inserted in the neck of the test bottle as illustrated in Fig. 1 and the sample allowed to flow from the pipette into the test bottle. Hereto-fore difiiculty has been encountered in making this transfer with any degree of rapidity because of the danger of breaking the pipette stem and the neck of the test bottle. The present invention therefore contemplates the provision of protecting means in the nature of a washer adapted to embrace the lower end of the body of the pipette and the adjacent portion of the pipette stem, which washer will cushion the contact of I the pipette with the test bottle neck.

Referring now particularly to Figs. 2, 3 and 4, the numeral 25 designates generally a washer adapted to be associated with the pipette in the manner above'indicated. It will be noted that this washer has a lower annular portion 2! adapted to embrace the pipette stem adjacent the point where this stem merges into the pipette body. The washer is'also provided with asubstantially conical recess 22 of a size and shape I T to snugly engage the lower portion of the pipette,

body adjacent the pointwhere the body merges into the pipette stem. Exteriorly, the washer is provided with an annular enlarged rim'25, while H the sides of the washer below this rim are provided with ribs 26 to provide spaced grooves 27 i as clearly illustrated in Fig. 3 of the drawing.

It will be understood that the washer 25) .is

associated with and becomes in substance a permanent part of the pipette. if desired the" washer may be rigidly secured in position as by cementing or gluing the same to the" pipette, al-

though preferablythe washer is removably'held in position by virtue of its snug frictional engagement with the pipette. In the'latter case, it will i be understood that the washer may be removed from the pipette when it is desired to washthe pipette.

The washer is formed of some yieldable'material such as rubber and in use emciently cushions the contact of the pipette stem. and body with the neck of the test bottle.

escape of air trapped in the test bottle.

economical and effective protecting means for the pipettes and test bottles.

While the invention has been described with some detail, it. is to be understood that the description is not definitive of the limits of the inventive idea and that the right is reserved to;

make such changes in the details oi construction as will fall within the purview of the attached claim. I

What I claim as my invention is; A cushioning member for useon pipettes of the The ribs 26 of the washer engage the flared portion of the test. bottle neck while the grooves 27 provide for the The fluted washers may be economically produced and easily applied to pipettes and thus constitute'an surface to fit said tapered end and having an outer substantially conical surface with a plurality of flutes thereon, said conical surfaces converging in the same direction.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2655280 *Mar 31, 1950Oct 13, 1953Astell Lab Service Company LtdBung or stopper
US2670976 *May 11, 1950Mar 2, 1954Owen Frank MFlexible joint and sealing element therefor
US2708359 *Sep 2, 1952May 17, 1955Henry Clarence BExpansion joint for masonry walls
US2871033 *Aug 17, 1953Jan 27, 1959StoutCoupler for pipe sections with intermediate fluid actuated seal and gripping means
US3080183 *Feb 18, 1959Mar 5, 1963Lurex Mfg CompanyJoints for use in scientific glass apparatus
US3177723 *May 1, 1961Apr 13, 1965Beckman Instruments IncPipette and method
US3373601 *Aug 2, 1965Mar 19, 1968Stanislaus MonnDevice for the analysis of the sinking speed of blood corpuscles in a calibrated tube
US3739821 *Apr 26, 1971Jun 19, 1973Technicon InstrMachine-transferrable pipette
US4170137 *Sep 21, 1978Oct 9, 1979Ridgley William AThermometer and integral joint
US4834430 *Jan 19, 1988May 30, 1989Vassallo Research & Development Corp.Pipe socket insert
US6335204 *Sep 29, 1999Jan 1, 2002Bayer CorporationFluid transfer apparatus for delivery of fluids during sample recovery, diagnostic testing, environmental monitoring and sample measurements
US7823887 *Feb 10, 2005Nov 2, 2010Weir-Envirotech (Proprietary) LimitedSealing between components of a rotary machine
EP2636728A1 *Mar 9, 2012Sep 11, 2013HEXASCREEN Culture Technologies, S.L.Sample taking device
WO2013132019A1 *Mar 7, 2013Sep 12, 2013Hexascreen Culture Technologies, S.L.Sample taking device
U.S. Classification285/374, 277/627, 285/423, 422/922, 73/864.1, 277/626, 422/564
International ClassificationB01L3/02
Cooperative ClassificationB01L3/021, B01L3/0213
European ClassificationB01L3/02C1, B01L3/02C