Patent ID: 8202495

Claim:
An ergonomic pipette tip comprising: an elongated tubular receptacle; and a sealing member, wherein the elongated tubular receptacle is made from a first material and includes a upper portion with a receiving surface facing a central axis of the elongated tubular receptacle, and defining a central receiving cavity, wherein the receiving surface is configured to receive the sealing member, wherein the sealing member is made from a second material and includes at least one arched-shaped sealing ring protrusion configured to face the central axis of the elongated tubular receptacle, wherein the sealing member includes an attachment surface hermetically bonded to said receiving surface of said central receiving cavity of said upper portion of said tubular receptacle, wherein the sealing ring protrusion is disposed in a substantially perpendicular relation to said central axis of said elongated tubular receptacle, wherein the sealing ring protrusion is made from an elastomeric material and is configured to provide a sealing surface for sealing engagement with a pipetter barrel inserted into said central receiving cavity of said upper portion of said elongated tubular receptacle, wherein said upper portion of said elongated tubular receptacle has an upper edge portion having a top face surface, wherein said top face surface extends in a direction substantially perpendicular to said central axis of the elongated tubular receptacle, wherein an upper end of the sealing member includes a flange portion which extends in a direction substantially perpendicular to said central axis of the elongated tubular receptacle, wherein the flange portion includes a bottom face which extends in a direction substantially perpendicular to said central axis of the elongated tubular receptacle, wherein the bottom face of the flange portion is hermetically bonded to the top face surface of said upper edge portion of said upper portion to form a seal therebetween.