Slip-on pipette tip member and pipette device therefor
First Claim
1. An improved slip-on pipette tip member in the form of an elongated receptacle being at least partly of a conical configuration for mating with an adapter cone of a pipette device onto which the tip member is to be engaged, said tip member having a top mounting opening, a bottom fluid intake and discharge opening, and a hollow passageway formed by outer walls and extending between said top mounting opening and said fluid intake and discharge opening for fluid communication therebetween wherein the improvement comprises a sealing zone located along the axial length of said pipette tip member in a position between said mounting opening and said intake and discharge opening to be engaged by a radially projecting collar on the end portion of said adapter cone of said pipette device, said sealing zone comprising a portion of wall area of selectively reduced wall thickness at the outer surface of said tip member, said wall portion of said tip member being more resilient and elastically adaptable in the area of said sealing zone relative to the other walls of said tip member so that said sealing zone is deformable with yieldable characteristics being of reduced rigidity in order to more effectively receive and seal said end of said adapter cone.
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Accused Products
Abstract
A detachable pipette tip member that may be "snapped" onto an adapter cone portion of a pipette body. The wall portion of the tip member engagable by the adapter cone defines a deformable conical sealing zone with yieldable characteristics obtained by a selective reduction of the wall thickness of the tip member in the sealing zone.
159 Citations
11 Claims
- 1. An improved slip-on pipette tip member in the form of an elongated receptacle being at least partly of a conical configuration for mating with an adapter cone of a pipette device onto which the tip member is to be engaged, said tip member having a top mounting opening, a bottom fluid intake and discharge opening, and a hollow passageway formed by outer walls and extending between said top mounting opening and said fluid intake and discharge opening for fluid communication therebetween wherein the improvement comprises a sealing zone located along the axial length of said pipette tip member in a position between said mounting opening and said intake and discharge opening to be engaged by a radially projecting collar on the end portion of said adapter cone of said pipette device, said sealing zone comprising a portion of wall area of selectively reduced wall thickness at the outer surface of said tip member, said wall portion of said tip member being more resilient and elastically adaptable in the area of said sealing zone relative to the other walls of said tip member so that said sealing zone is deformable with yieldable characteristics being of reduced rigidity in order to more effectively receive and seal said end of said adapter cone.
Specification