GB2172218A - Pipetter tips for pipetters - Google Patents

Pipetter tips for pipetters Download PDF

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Publication number
GB2172218A
GB2172218A GB08603908A GB8603908A GB2172218A GB 2172218 A GB2172218 A GB 2172218A GB 08603908 A GB08603908 A GB 08603908A GB 8603908 A GB8603908 A GB 8603908A GB 2172218 A GB2172218 A GB 2172218A
Authority
GB
United Kingdom
Prior art keywords
nozzle
inches
taper
pipetter
diameter
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.)
Granted
Application number
GB08603908A
Other versions
GB8603908D0 (en
GB2172218B (en
Inventor
Derek John Boorman
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.)
Rocket of London Ltd
Original Assignee
Rocket of London Ltd
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 claimed from GB858503861A external-priority patent/GB8503861D0/en
Application filed by Rocket of London Ltd filed Critical Rocket of London Ltd
Priority to GB08603908A priority Critical patent/GB2172218B/en
Publication of GB8603908D0 publication Critical patent/GB8603908D0/en
Publication of GB2172218A publication Critical patent/GB2172218A/en
Application granted granted Critical
Publication of GB2172218B publication Critical patent/GB2172218B/en
Expired 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
    • B01L3/0275—Interchangeable or disposable dispensing tips

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  • Health & Medical Sciences (AREA)
  • Clinical Laboratory Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Devices For Use In Laboratory Experiments (AREA)

Abstract

Previously it has been necessary to provide a series of different tips for pipetters to allow fitment to various types and sizes of pipetters. A pipetter tip comprises a nozzle, for fitment to one end of a pipetter, having a generally conical internal bore. The bore has three differently tapered sections with a small inwardly extending step between each section. The intermediate section has a greater angle of taper than the two end sections. In use the differently angled tapers allow the tip to fit a variety of different pipetters. <IMAGE>

Description

SPECIFICATION Pipetter tips for pipetters This invention relates to a pipetter tip for pipetters especially but not exclusively of the mechanical spring-loaded syringe type.
Pipetters are generally provided with removable tips. The tips can be changed between samples to prevent contamination. Previously however it has been necessary to provide a series of different tips to allow fitment to various types and sizes of pipetters.
According to the present invention there is provided a pipetter tip for pipetters comprising a nozzle for fitment to an end portion of a pipetter and having a generally conical internal bore wherein the angle of taper of said bore varies along the length of said bore.
Preferably the internal bore of the nozzle has a plurality of differently tapered sections each section having a constant taper along the length of the section.
Preferably also the internal bore has inwardly extending steps between each section of said taper.
Most preferably three differently tapered sections are provided for engagement with the end portion of a pipetter.
Preferably also the intermediate section of the three tapered sections has a greater angle of taper than the two end sections.
Preferably also the first tapered section has an angle of taper in the range of 2" to 3 from the longitudinal axis of the nozzle, the intermediate tapered section has an angle of taper in the range of 3 to 4" from the longitudinal axis of the nozzle and the third tapered section has an angle of taper in the range of 2" to 3 from the longitudinal axis of the nozzle.
Most preferably the angles of taper of the three sections are 2 42', 3 43' and 2 41'11" respectively.
Preferably also the nozzle is 1.996 inches in length with the first tapered section extending 0.195 inches along the nozzle and tapering from a diameter of 0.220 inches to a diameter of 0.202 inches, the intermediate tapered section extending 0.100 inches along the nozzle and tapering from a diameter of 0. 199 inches to a diameter of 0. 1855 inches and the third tapered section extending along the remainder of the nozzle and tapering from a diameter of 0.180 inches to a diameter of 0.020 inches.
Preferably also the nozzle is of a polypropylene material.
An embodiment of the present invention will now be described, by way of example, with reference to the accompanying drawing which is a part cut away sectional side view of a pipetter tip for pipetters in accordance with the present invention.
Referring to the drawing, a pipetter tip for a pipetter is in the form of a nozzle 1 and has a generally conical external shape. The nozzle has an internal bore 2 which has a first tapered section 3, an intermediate tapered section 4 and a third tapered section 5.
The nozzle has an overall length of 1.996 inches with the first tapered section 3 being 0.195 inches long, the intermediate tapered section 4 being 0.100 inches long and the third tapered section being 1.701 inches long.
The dimensions given with reference to the drawing are manufacture dimensions and subject to material shrinkage of 0.18 inches per inch.
The first tapered section 3 has an angle of taper of 2 42', and decreases in diameter along its length from 0.220 inches to 0.202 inches. The bore 2 has a first step 3a between the first tapered section 3 and the intermediate tapered section 4 which reduces the diameter at the upper part of the intermediate tapered section 4 to 0.199 inches in diameter. The intermediate tapered section 4 has an angle of taper of 3"43' and decreases in diameter along its length to 0.1855 inches.
The bore 2 has a second step 4a between the intermediate tapered section 4 and the third tapered section 5 which reduces the diameter at the upper part of the third tapered section to 0.180 inches in diameter. The third tapered section 5 has an angle of taper of 2 41'11" and decreases in diameter along its length to 0.020 inches.
The nozzle is manufactured from a polypropylene material which, for sterilisation purposes, is autoclavable and irradiatable, without distortion or degradation.
In use the nozzle 1 can be easily affixed to the end of a pipetter tube with the end of the pipetter sealably engaging with one of the tapered sections 3, 4 and 5 in the bore 2 of the nozzle 1.
The tip allows samples to be taken easily with the pipetter and can be easily changed between samples to prevent contamination.
The actual angles of the tapers are arranged such that they are sufficiently close to the angle of taper of the end portions of many common pipetters to provide a good seal but not so close as to produce an interference fit which would make the tip difficult to remove from the pipetter.
Examples of pipetters which the tip fits are, among others, pipetters manufactured by: BCL Brand Costar Centaur Eppendorf Elkay Finnpipette Fiow Gilson Gordon-Keeble Labora MLA Soccorex Unipette Volac Wheaton Modifications and improvements may be made without departing from the scope of the invention

Claims (10)

1. A pipetter tip for pipetters comprising a nozzle for fitment to an end portion of a pipetter and having a generally conical internal bore wherein the angle of taper of said bore varies along the length of said bore.
2. A pipetter tip as claimed in Claim 1, wherein the internal bore of the nozzle has a plurality of differently tapered sections each section having a constant taper along the length of the section.
3. A pipetter tip as claimed in Claim 2, wherein the internal bore has inwardly extending steps between each section of said taper.
4. A pipetter tip as claimed in Claim 2 or 3, wherein three differently tapered sections are provided for engagement with the end portion of a pipette.
5. A pipetter tip as claimed in Claim 4, wherein the intermediate section of the three tapered sections has a greater angle of taper than the two end sections.
6. A pipetter tip as claimed in Claim 5, wherein the first tapered section has an angle of taper in the range of 2" to 3 from the longitudinal axis of the nozzle, the intermediate tapered section has an angle of taper in the range of 3 to 4" from the longitudinal axis of the nozzle and the third tapered section has an angle of taper in the range of 2" to 3 from the longitudinal axis of the nozzle.
7. A pipetter tip as claimed in Claim 6, wherein the angles of taper of the three sections are 2 42', 3"43' and 2 41'11" respectively.
8. A pipetter tip as claimed in any one of Claims 4 to 7, wherein the nozzle is 1.996 inches in length with the first tapered section extending 0.195 inches along the nozzle and tapering from a diameter of 0.220 inches to a diameter of 0.202 inches, the intermediate tapered section extending 0.100 inches along the nozzle and tapering from a diameter of 0.199 inches to a diameter of 0.1855 inches and the third tapered section extending along the remainder of the nozzle and tapering from a diameter of 0. 180 inches to a diameter of 0.020 inches.
9. A pipetter tip as claimed in any one of the preceding Claims, wherein the nozzle is of a polypropylene material.
10. A pipetter tip substantially as hereinbefore described with reference to the accompanying drawing.
GB08603908A 1985-02-15 1986-02-17 Pipetter tip for pipetters Expired GB2172218B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08603908A GB2172218B (en) 1985-02-15 1986-02-17 Pipetter tip for pipetters

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB858503861A GB8503861D0 (en) 1985-02-15 1985-02-15 Tip for pipettes
GB08603908A GB2172218B (en) 1985-02-15 1986-02-17 Pipetter tip for pipetters

Publications (3)

Publication Number Publication Date
GB8603908D0 GB8603908D0 (en) 1986-03-26
GB2172218A true GB2172218A (en) 1986-09-17
GB2172218B GB2172218B (en) 1988-07-20

Family

ID=26288817

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08603908A Expired GB2172218B (en) 1985-02-15 1986-02-17 Pipetter tip for pipetters

Country Status (1)

Country Link
GB (1) GB2172218B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0743095A1 (en) * 1995-05-19 1996-11-20 Matrix Technologies Corp. Small volume disposable pipette tip
US6066297A (en) * 1997-01-03 2000-05-23 Matrix Technologies Corporation Small sample volume displacement pipette tips
DE19917375A1 (en) * 1999-04-16 2000-11-02 Hamilton Bonaduz Ag Bonaduz Pipette tip, pipetting device and combination of pipette tip and pipetting device
WO2002000345A2 (en) * 2000-06-26 2002-01-03 Vistalab Technologies, Inc. Automatic pipette with tip identification and detipping mechanism
US6596240B2 (en) 2001-01-12 2003-07-22 Porex Corporation Pipette tip for easy mounting and ejecting from a pipette
US7416704B2 (en) 2000-06-26 2008-08-26 Vistalab Technologies, Inc. Handheld pipette
US7939031B2 (en) * 2004-07-16 2011-05-10 Stemcell Technologies, Inc. Automated pipette machine
WO2016028998A1 (en) * 2014-08-20 2016-02-25 Corning Incorporated Pipette tips with enhanced attributes and methods for manufacturing

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD620602S1 (en) 2008-01-03 2010-07-27 Vistalab Technologies, Inc. Pipette

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB584841A (en) * 1945-01-29 1947-01-23 Verney Stott Improvements in or relating to apparatus for the delivery of liquids in measured quantities
US3646817A (en) * 1968-10-25 1972-03-07 Bio Dynamics Inc Pipette
US3757585A (en) * 1968-08-16 1973-09-11 Heller Labor Pipette apparatus
US3830108A (en) * 1972-08-02 1974-08-20 F Spong Pipetting device
US4141251A (en) * 1978-02-15 1979-02-27 Nichiryo Co., Ltd. Pipetting device
US4309912A (en) * 1980-08-01 1982-01-12 Smith Kendall O Micro-analysis process and device
EP0067605A1 (en) * 1981-06-17 1982-12-22 Labsystems Oy Pipette
EP0077180A2 (en) * 1981-10-13 1983-04-20 Sherwood Medical Company Pipettor mechanism and disposable tip and piston assembly
GB2112664A (en) * 1981-12-24 1983-07-27 Kendall O Smith Liquid sample dilution means and process and a tip therefor
WO1984000119A1 (en) * 1982-06-29 1984-01-19 Labsystems Oy Pipette with adjustable volume

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB584841A (en) * 1945-01-29 1947-01-23 Verney Stott Improvements in or relating to apparatus for the delivery of liquids in measured quantities
US3757585A (en) * 1968-08-16 1973-09-11 Heller Labor Pipette apparatus
US3646817A (en) * 1968-10-25 1972-03-07 Bio Dynamics Inc Pipette
US3830108A (en) * 1972-08-02 1974-08-20 F Spong Pipetting device
US4141251A (en) * 1978-02-15 1979-02-27 Nichiryo Co., Ltd. Pipetting device
US4309912A (en) * 1980-08-01 1982-01-12 Smith Kendall O Micro-analysis process and device
EP0067605A1 (en) * 1981-06-17 1982-12-22 Labsystems Oy Pipette
EP0077180A2 (en) * 1981-10-13 1983-04-20 Sherwood Medical Company Pipettor mechanism and disposable tip and piston assembly
GB2112664A (en) * 1981-12-24 1983-07-27 Kendall O Smith Liquid sample dilution means and process and a tip therefor
WO1984000119A1 (en) * 1982-06-29 1984-01-19 Labsystems Oy Pipette with adjustable volume

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0743095A1 (en) * 1995-05-19 1996-11-20 Matrix Technologies Corp. Small volume disposable pipette tip
US6066297A (en) * 1997-01-03 2000-05-23 Matrix Technologies Corporation Small sample volume displacement pipette tips
DE19917375A1 (en) * 1999-04-16 2000-11-02 Hamilton Bonaduz Ag Bonaduz Pipette tip, pipetting device and combination of pipette tip and pipetting device
DE19917375C2 (en) * 1999-04-16 2001-09-27 Hamilton Bonaduz Ag Bonaduz Pipetting unit
US9415388B2 (en) 1999-04-16 2016-08-16 Hamilton Bonaduz Ag Pipette tip, pipette device, and combination of pipette tip and pipette device
US6977062B2 (en) 2000-06-26 2005-12-20 Vistalab Technologies, Inc. Automatic pipette identification
US6749812B2 (en) 2000-06-26 2004-06-15 Vistalab Technologies Automatic pipette detipping
WO2002000345A3 (en) * 2000-06-26 2002-06-20 Vistalab Technologies Inc Automatic pipette with tip identification and detipping mechanism
US7416704B2 (en) 2000-06-26 2008-08-26 Vistalab Technologies, Inc. Handheld pipette
US8114362B2 (en) 2000-06-26 2012-02-14 Vistalab Technologies, Inc. Automatic pipette identification
WO2002000345A2 (en) * 2000-06-26 2002-01-03 Vistalab Technologies, Inc. Automatic pipette with tip identification and detipping mechanism
US6596240B2 (en) 2001-01-12 2003-07-22 Porex Corporation Pipette tip for easy mounting and ejecting from a pipette
US7939031B2 (en) * 2004-07-16 2011-05-10 Stemcell Technologies, Inc. Automated pipette machine
WO2016028998A1 (en) * 2014-08-20 2016-02-25 Corning Incorporated Pipette tips with enhanced attributes and methods for manufacturing
JP2017525555A (en) * 2014-08-20 2017-09-07 コーニング インコーポレイテッド Pipette tip with enhanced attributes and manufacturing method
EP3183061B1 (en) 2014-08-20 2018-12-05 Corning Incorporated Pipette tips with enhanced attributes and methods for manufacturing

Also Published As

Publication number Publication date
GB8603908D0 (en) 1986-03-26
GB2172218B (en) 1988-07-20

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19970217