WO1997032666B1 - Manual pipette with delayed-action home position latch - Google Patents
Manual pipette with delayed-action home position latchInfo
- Publication number
- WO1997032666B1 WO1997032666B1 PCT/US1997/004781 US9704781W WO9732666B1 WO 1997032666 B1 WO1997032666 B1 WO 1997032666B1 US 9704781 W US9704781 W US 9704781W WO 9732666 B1 WO9732666 B1 WO 9732666B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- plunger unit
- latch
- home position
- pipette
- stop
- Prior art date
Links
- 230000003111 delayed effect Effects 0.000 claims abstract 5
- 230000005294 ferromagnetic effect Effects 0.000 claims 3
- 239000007788 liquid Substances 0.000 claims 3
- 230000005291 magnetic effect Effects 0.000 claims 2
- 230000000295 complement effect Effects 0.000 claims 1
- 230000001419 dependent effect Effects 0.000 claims 1
Abstract
A manual pipette (12) including a delayed action home position latch (26) for engaging only after the plunger unit (16) of the pipette has moved downward through its home position to thereafter releasably connect a moveable bottom stop member (46) to the plunger unit to move therewith and upon an upward return of the plunger unit by the pipette's return spring (18) to engage a home position stop (28) to releasably lock the plunger unit in its home position without any downward force being exerted by the pipette user on the plunger unit.
Claims
1. A manual pipette (10) for repeatably aspirating and diβpensing a predetermined quantity of liquid, comprising: a hollow hand holdable pipette body (12) containing an upper stop (20), a lower atop (24) and a home position stop (28); a plunger unit (16) mounted within the pipette body (12) for manual movement by a pipette user downward from the upper stop (20), past the home position stop (28) to the lower stop (24), the upper, lower and home position stops defining upper, lower and home stop positions for the plunger unit, the home position being a predetermined starting position for the plunger unit for repeatable aspiration of the predetermined quantity of liquid into a tip extending from the pipette body when the tip iβ immersed in the liquid; a return spring (18) within the pipette body (12) for generating an upward force opposing downward movement of the plunger unit (16) away from the upper stop (20) and for returning the plunger unit to the upper stop position upon a release of the plunger unit; a bottom stop member (46) moveable relative to the plunger unit (16) within the pipette body (12) between the lower stop (24) and the home position stop (28); and a delayed action home position latch (26) including a
53 first latch member (26a) on the bottom atop member or on the plunger unit and a second latch member (26b) for engaging the first latch member only after the plunger unit (16) has moved downward through its home position to thereafter releasably connect the bottom stop member (46) to the plunger unit to move therewith and upon an upward return of the plunger unit toward the upper stop to engage the home position stop to releasably lock the plunger unit in its home position without any downward force being exerted by the pipette user on the plunger unit.
2. The manual pipette of claim 1 further including a pipette user actuated trigger mechanism (80) for releasing the home position latch (26).
3. The manual pipette of claim 1 wherein the first latch member (26a) is on the bottom stop member (46) and a second latch member (26b) is on the plunger unit (16).
4. The manual pipette of claim 3 further comprising a pipette user actuated trigger mechanism (80) carried by the pipette body (12) for exerting an upward force on the plunger unit (16) to move the second latch member (26b) away from the first latch member (26a) to release the home position latch (26).
54
5. The manual pipette of claim 3 wherein the home position latch (26) is a magnetic latch comprising: a magnet (60) on one of the bottom stop member (46) and the plunger unit (16); and a ferromagnetic pull piece (74) on the other of the bottom stop member (46) and the plunger unit (16).
6. The manual pipette of claim 3 wherein the home position latch (26) further includes a spacing member (26c) for normally separating the first and second latch members (26a, 26b) as the plunger unit (16) moves downward from the upper stop position past itβ home position and for releasing after the plunger unit has past its home position to allow the first and second latch member to engage in response to a latch engaging force and releasably lock the bottom stop member to the plunger unit for upward movement therewith until the bottom stop member engageβ the home position stop (28) to hold the plunger unit in itβ home position againβt the upward force of the return string (18).
7. The manual pipette of claim 5 wherein the magnetic latch further comprises a spacing member (26c) including a spacing spring (70) for compressing as the bottom stop member (46) contacts the lower stop (24) and the pipette user applies a downward force to the plunger unit (16) to
55 move the plunger unit toward the bottom stop member (46) to allow the magnet (60) to lock to the pull piece (74) and thereby releasably engage the home position latch.
8. The manual pipette of claim 6 wherein the home position latch (26) iβ a mechanical latch comprising: the first latch member (26a) comprising a first locking member (92) on the plunger unit (16); the second latch member (26b) comprising a second locking member (100) on the bottom stop member (46); and the spacing member (26c) comprising a deformable member
(96) for deforming aa the bottom stop member (46) contacts the lower stop (24) and the pipette user applies a downward force to the plunger unit to move the plunger unit toward the bottom stop member to allow the first and second locking membere to lock and releasably engage the home position latch.
9. The manual pipette of claim 8 wherein the deformable member (96) comprises a laterally flexible finger extending axially from the bottom stop member (46)to engage the first locking member (92) on the plunger unit (16).
10. The manual pipette of claim 9 wherein the flexible finger (96) and the first locking member (92) carry
56 complementary cam surfaces (102, 102a) for engaging and laterally deflecting the finger to allow the first and second locking members (92, 100) to lock together.
11. The pipette of claim 3 wherein t the second latch member (26b) is moveable axially with the plunger unit (16) to engage the bottom stop member (46) when the plunger unit reaches itβ home position and comprises one of a ferromagnetic pull piece (74) or a magnet (60); the first latch member (26a) comprises a second of the pull piece (74) or the magnet (60) supported for axial movement relative to the plunger unit (16) and the bottom stop member (46) to engage and releaseably lock to the one of the pull piece or the magnet after the plunger unit has moved downward past itβ home position; and the pipette further comprises a second βpring (104) for urging the bottom stop member (46) upward against the home position stop (28).
12. The pipette of claim 11 further comprising a holder (48) axially moveable within the pipette body (12) relative to the plunger unit (16) and the bottom stop member (46), the holder supporting the second of the pull piece (74) or the magnet (60).
13. The pipette of claim 12 further comprising a second lower stop (110) for engaging the holder (48) to limit downward movement of the holder.
14. The pipette of claim 13 wherein the home position latch (26) further comprises a spacing member (26c) for normally separating the first and second latch members (26a, 26b) as the plunger unit (16) moves downward from the upper stop position past its home position.
15. The pipette of claim 14 wherein the spacing member (26c) includes a spacing spring (70) for compressing as the holder (48) contacts the second lower stop (110) and the pipette user applies a downward force to the plunger unit (16) to move the plunger unit to the lower stop (24) to allow the magnet (60) to releaeeably lock to the pull piece (74) and thereby releaseably engage the home position latch (26).
16. The pipette of claim 1 wherein: the first latch member (26a) is on the plunger unit
(16) and the second latch member (26b) iβ supported for axial movement relative to the plunger unit and the bottom stop member (46) to engage and releaseably lock to the first latch member after the plunger unit has moved downward past
58 its home position; and the pipette further comprises a second spring (104) for urging the bottom stop member (46) upward against the home position stop (28), a contact member (26c) moveable with the plunger unit to engage the bottom stop member (46) when the plunger unit (16) reaches itβ home position to drive the bottom stop member downward with movement of the plunger unit from its home position to the lower stop, and a second lower stop (110) for limiting downward movement of the βecond latch member (26b) relative to the bottom βtop member.
17. The pipette of claim 16 whereint the first latch member (26a) comprises one of a nub (102) or a latch piece (96) on the plunger unit; and the second latch member (26b) comprises a second of the nub (102) or the latch piece (96) including an axially extending laterally flexible finger for engaging and releaseably locking to the nub.
18. The pipette of claim 16 wherein: the first latch member (26a) comprises one of a ferromagnetic pull piece (74) or a magnet (60); and the second latch member (26b) comprises a second of the pull piece (74) or the magnet (60).
59 STATEMENT UNDER ARTICLE 19
In response to the International Search Report mailed 11 July 1997, and accompanying this Statement are substitute pages 46-52 comprising a substitute set of claimβ. Claim 1 has been amended to add a first and second latch member to the delayed action latch. Claim 3 has been amended to delete "home position latch includes a" . Claim 16 has been amended to change fa" to "the" with respect to firβt and second latch members.
The amendments incorporated in claim 1 and thus in all of the dependent claimβ distinguish the claimed structure from all art of record. In particular, the art of record including Magnussen and Kuhn does not teach or suggest a delayed action latch. Specifically, there is no structural or functional relation ship between the lever 37 of Kuhn and the delayed action latch as defined in amended claim 1 comprising a first latch member on a one of the stop member or plunger unit and a second latch member for engaging the firat Jatch member only after the plunger unit has moved downward through itβ home position. Rather, Kuhn is directed to a repeating pipette comprising a reciprocating toothed rack advanced by a pawl connected to the lever 37. Kuhn does not disclose a first latch member engaged by a βecond latch member after a plunger unit haβ traveled through a home position. In particular, the levers 37 and 39 of Kuhn do pot, engage and perform a latching function for releasably locking a bottom βtop member to a plunger unit.
60
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP97916202A EP0827426B1 (en) | 1996-03-05 | 1997-03-05 | Manual pipette with delayed-action home position latch |
| DE69733455T DE69733455T2 (en) | 1996-03-05 | 1997-03-05 | HANDPIPETTE WITH DELAYED RESTRAINT LOCK |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US61107596A | 1996-03-05 | 1996-03-05 | |
| US08/611,075 | 1996-03-05 | ||
| US08/658,862 US5792424A (en) | 1996-03-05 | 1996-08-15 | Manual pipette with delayed-action home position latch |
| US08/658,862 | 1996-08-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1997032666A1 WO1997032666A1 (en) | 1997-09-12 |
| WO1997032666B1 true WO1997032666B1 (en) | 1997-10-30 |
Family
ID=27086432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1997/004781 WO1997032666A1 (en) | 1996-03-05 | 1997-03-05 | Manual pipette with delayed-action home position latch |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5792424A (en) |
| EP (1) | EP0827426B1 (en) |
| DE (1) | DE69733455T2 (en) |
| WO (1) | WO1997032666A1 (en) |
Families Citing this family (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1017982A4 (en) * | 1997-09-25 | 2004-10-06 | Macquarie Res Ltd | Apparatus for removing a sample from an array of samples and a cutting tool for use with that apparatus |
| US6295880B1 (en) * | 1999-12-08 | 2001-10-02 | Warren E. Gilson | Adjustable pipette |
| US6428750B1 (en) * | 2000-02-17 | 2002-08-06 | Rainin Instrument, Llc | Volume adjustable manual pipette with quick set volume adjustment |
| US6365110B1 (en) * | 2000-03-09 | 2002-04-02 | Rainin Instrument | Blowout springless manual air displacement pipette with mechanical assist for aiding in locating and maintaining pipette plunger at a home position |
| US6352673B1 (en) * | 2000-03-09 | 2002-03-05 | Rainin Instrument | Ergonomic return springless manual air displacement pipette |
| FR2807342B1 (en) * | 2000-04-07 | 2002-07-12 | Gilson Sa | CONCEAL EJECTOR PIPETTE |
| FR2807345B1 (en) * | 2000-04-07 | 2002-07-12 | Gilson Sa | SIMPLIFIED DISASSEMBLY PIPETTE |
| FR2807343B1 (en) * | 2000-04-07 | 2002-12-06 | Gilson Sa | COLLECTION PIPETTE PROVIDED WITH MEANS FOR ADJUSTING THE VOLUME TO BE COLLECTED |
| EP1296762A2 (en) * | 2000-06-26 | 2003-04-02 | Vistalab Technologies, Inc. | Automatic pipette with tip identification and detipping mechanism |
| JP5192112B2 (en) * | 2000-06-26 | 2013-05-08 | ビスタラブ テクノロジーズ インク | Hand-held pipette |
| US7879293B2 (en) * | 2001-09-28 | 2011-02-01 | Orasure Technologies, Inc. | Sample collector and test device |
| USD470240S1 (en) | 2001-09-28 | 2003-02-11 | Orasure Technologies, Inc. | Handle for a sample collector |
| USD631553S1 (en) | 2001-09-28 | 2011-01-25 | Orasure Technologies, Inc. | Test device |
| USD467665S1 (en) | 2001-09-28 | 2002-12-24 | Orasure Technologies, Inc. | Test device |
| WO2004009238A1 (en) * | 2002-07-23 | 2004-01-29 | Protedyne Corporation | Liquid handling tool having hollow plunger |
| EP1514600B2 (en) * | 2003-08-19 | 2012-02-22 | Socorex Isba S.A. | Mechanical piston pipette |
| US7396512B2 (en) | 2003-11-04 | 2008-07-08 | Drummond Scientific Company | Automatic precision non-contact open-loop fluid dispensing |
| US7641859B2 (en) * | 2004-02-11 | 2010-01-05 | Matrix Technologies Corporation | Pipette tip mounting and ejection assembly and associated pipette tip |
| DE102005033378B4 (en) * | 2005-07-16 | 2012-05-31 | Eppendorf Ag | pipette |
| USD620602S1 (en) | 2008-01-03 | 2010-07-27 | Vistalab Technologies, Inc. | Pipette |
| WO2009125337A1 (en) * | 2008-04-08 | 2009-10-15 | Socorex Isba S.A. | Joint for device for metering liquids |
| KR20130029128A (en) * | 2010-07-23 | 2013-03-21 | 베크만 컬터, 인코포레이티드 | Vessel for real time pcr |
| WO2013166203A2 (en) * | 2012-05-01 | 2013-11-07 | Life Technologies Corporation | Pippette devices, systems, and methods of use thereof |
| TWM455413U (en) * | 2013-01-28 | 2013-06-21 | Well Max Beauty Lab Co Ltd | Pipette container |
| US10016755B2 (en) | 2015-01-08 | 2018-07-10 | Integra Biosciences Ag | Manual pipette with selectable plunger force |
| KR101874278B1 (en) | 2015-04-16 | 2018-07-03 | 인테그라 바이오사이언시즈 아게 | Volume adjustment for manual pipette |
| FR3040896B1 (en) * | 2015-09-15 | 2017-10-13 | Gilson Sas | PRESSURE PIPETTE COMPRISING A DOUBLE-FUNCTION CONTROL MEMBER FOR CONE EJECTION AND UNLOCKING OF THE VOLUME ADJUSTMENT SYSTEM |
| US11092522B2 (en) * | 2017-03-01 | 2021-08-17 | Janusz Pawliszyn | Devices to facilitate sampling with thin film solid phase microextraction |
| US10471422B2 (en) | 2017-06-30 | 2019-11-12 | Mettler-Toledo Rainin, LLC | Home position locating mechanism for manual pipette and manual pipette equipped with same |
| US10744498B2 (en) * | 2017-09-19 | 2020-08-18 | Mettler-Toledo Rainin, LLC | Pipette quickset volume adjustment mechanism |
| DE102022105534A1 (en) * | 2022-03-09 | 2023-09-14 | Eppendorf Se | Air cushion pipette |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3827305A (en) * | 1972-10-24 | 1974-08-06 | R Gilson | Adjustable pipette |
| DE2926691C2 (en) * | 1979-07-02 | 1983-05-26 | Eppendorf Gerätebau Netheler + Hinz GmbH, 2000 Hamburg | Repeater pipette |
| DE2549477C3 (en) * | 1975-11-05 | 1982-01-07 | Eppendorf Gerätebau Netheler + Hinz GmbH, 2000 Hamburg | Pipetting device |
| US4327595A (en) * | 1980-07-07 | 1982-05-04 | Hamilton Company | Method and apparatus for simultaneous dilution and dispensation |
| US4763535A (en) * | 1985-11-07 | 1988-08-16 | Rainin Instrument Co., Inc. | Pipette mechanism |
| JP2554666B2 (en) * | 1987-09-18 | 1996-11-13 | 株式会社ニチリョー | Variable pipette |
| US5364596A (en) * | 1992-12-01 | 1994-11-15 | Rainin Instrument Co., Inc. | Manual pipette with plunger velocity governor, home position latch and trigger release |
-
1996
- 1996-08-15 US US08/658,862 patent/US5792424A/en not_active Expired - Lifetime
-
1997
- 1997-03-05 DE DE69733455T patent/DE69733455T2/en not_active Expired - Lifetime
- 1997-03-05 WO PCT/US1997/004781 patent/WO1997032666A1/en active IP Right Grant
- 1997-03-05 EP EP97916202A patent/EP0827426B1/en not_active Expired - Lifetime
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