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US 2025/0018385 A1Published application
Hollow needle for a sample pipettor
AssigneeTecan Trading AG
InventorsRoland WURGLER, Peter KUMMERLI, Dominic ERB, Paul TANASESCU
Life of this patent
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Abstract
A hollow needle for piercing a closure of a sample vessel, wherein the hollow needle has a cylindrical hollow profile extending along a longitudinal axis and having a tip at a first end thereof, where the hollow needle has a first section that has a tip and a second section that has a larger diameter than the first section, and a transition between the first section and the second section has at least one cutting edge that extends from the first section to the second section.
Claims16
A hollow needle for piercing a closure of a sample vessel, comprising:
- an inner tube having a first outer diameter and which extends from a first end to a second end, the inner tube having a cylindrical hollow profile extending along a longitudinal axis thereof and having a tip at the first end thereof;
- an outer tube having a second outer diameter that is larger than the first outer diameter and which extends around and adjacent to the inner tube, the outer tube having a first end offset from the first end of the inner tube and a second end, a portion from the first end of the inner tube to the first end of the outer tube forming a first section, a portion from the first end of the outer tube to the second end of the outer tube forming a second section that extends along the longitudinal axis of the inner tube;
- and
- at least one cutting edge at a transition between the first section and the second section, the at least one cutting edge extending from the first outer diameter of the first section to the second outer diameter of the second section, wherein the at least one cutting edge comprises two surfaces formed in the outer tube.
1 more element
Dependencies are inferred from the claim text.