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EP0246632A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Pipetting device having an automatic mechanism for replacing nozzle tips

Assignee: Tosoh Corp
•
Filing: 1987-05-20
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Granted: —
•
Expires: 2007-05-20
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Abstract

Abstract A pipetting device is formed of a supporting frame, a slider (13) mounted on the supporting frame (12) for vertical movement, a plunger type stem (16) having a lower end fittable within the upper end of an approximately inverted cone shaped nozzle tip (9), the stem being mounted for vertical movement on the slider, and a conduit (17) for supplied the lower end of the stem with an air supply and exhaust device so that the nozzle tip may be communicated with air or air may be sucked therefrom. A rotating cam (14) cooperates with a pin (13a) on the slider for vertically moving the slider by a large stroke. An air cylinder (18) has a piston fixed relative to the stem for vertically moving the stem by a small stroke. A lever (19) loosely mounted on the lower end of the stem can engage the nozzle tip for removing the nozzle tip from the stem.

Inventors

  • 👤 Yuji Higo

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 03:45
CPC Classifications
G; G01; G01N; G01N35/00; G01N35/10; G01N35/1081; G01N35/1083; G01N35/1079; G01N2035/1027; G01N2035/103; G01N2035/1086

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 115 words
A pipetting device comprising: a supporting frame; a slider mounted on said supporting frame for vertical movement first power driving means for vertically moving said slider by a large stroke; a plunger type stem having a lower end fittable within the upper end of an approximately inverted cone shaped nozzle tip, said stem being mounted for vertical movement on said slider; means for communicating said lower end of said stem with an air supply and exhaust means, whereby said nozzle tip may be supplied with air or air may be sucked therefrom; and second power driving means for vertically moving said stem on said slider by a small stroke as compared to said large stroke.
Claim 2
Dependent Claim 115 words
A pipetting device comprising: a supporting frame; a slider mounted on said supporting frame for vertical movement first power driving means for vertically moving said slider by a large stroke; a plunger type stem having a lower end fittable within the upper end of an approximately inverted cone shaped nozzle tip, said stem being mounted for vertical movement on said slider; means for communicating said lower end of said stem with an air supply and exhaust means, whereby said nozzle tip may be supplied with air or air may be sucked therefrom; and second power driving means for vertically moving said stem on said slider by a small stroke as compared to said large stroke.
Claim 3
Dependent Claim 15 words
The device of Claim 1 including means for removing a nozzle tip from said stem.
Claim 4
Dependent Claim 42 words
The device of Claim 2 wherein said removing means comprises a lever mounted loosely on said lower end of said stem, and means for downwardly moving said lever so that said lever applies pressure to a nozzle tip fitted on said stem.
Claim 5
Dependent Claim 52 words
The device of Claim 2 wherein said first power driving means comprise: a fork type cam rotatably mounted on said supporting framework; means for rotating said cam about a horizontal axis; and pin means mounted on said slider and engaged by said cam, whereby rotation of said cam vertically moves said slider.
Claim 6
Dependent Claim 29 words
The device of Claim 2 wherein said second power driving means comprises a pneumatic cylinder device mounted to said slider and having a piston fixed relative to said stem.
Claim 7
Dependent Claim 29 words
The device of Claim 4 wherein said second power driving means comprises a pneumatic cylinder device mounted to said slider and having a piston fixed relative to said stem.
Claim 8
Dependent Claim 16 words
The device of Claim 2 including means for moving said support frame in a horizontal direction.
Claim 9
Dependent Claim 16 words
The device of Claim 6 including means for moving said support frame in a horizontal direction.
Claim 10
Dependent Claim 24 words
The device of Claim 2 in combination with means for supporting a plurality of said nozzle tips in a horizontal array beneath said stem.

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