A pipette tip coupling device for coupling a pipette tip to a pipette device , the pipette tip coupling device comprising: a shank having a proximal end face and a widest shank portion with a shank diameter; a coupler body distal to the shank , the coupler body having a widest coupler body portion with a coupler body diameter; wherein the coupler body diameter is greater than the shank diameter; a distal stem portion ; a distal end plate ; an open-ended interior circumscribing surface forming an open passageway extending longitudinally from the proximal end face through the distal end plate ; an elastomeric element disposed around the distal stem portion and adjacent to the distal end plate ; a discrete segment assembly circumscribing the shank comprising: a plurality of discrete segments forming a segmented ring, wherein each of the plurality of discrete segments comprises a radially inward surface and a radially outward surface ; and a spring retainer radially circumscribing the radially outward surface of each of the plurality of discrete segments in the segmented ring; characterized in that an annular wedge is provided that movably circumscribes the shank , the annular wedge comprising: a proximal wedge surface having a first wedge circumference; a distal wedge surface having a second wedge circumference less than the first wedge circumference; an exterior surface , wherein the exterior surface connects the proximal wedge surface with the distal wedge surface ; and wherein the exterior surface of the annular wedge abuts the radially inward surface of each of the plurality of discrete segments of the discrete segment assembly. a shank having a proximal end face and a widest shank portion with a shank diameter; a coupler body distal to the shank , the coupler body having a widest coupler body portion with a coupler body diameter; wherein the coupler body diameter is greater than the shank diameter; a distal stem portion ; a distal end plate ; an open-ended interior circumscribing surface forming an open passageway extending longitudinally from the proximal end face through the distal end plate ; an elastomeric element disposed around the distal stem portion and adjacent to the distal end plate ; a discrete segment assembly circumscribing the shank comprising: a plurality of discrete segments forming a segmented ring, wherein each of the plurality of discrete segments comprises a radially inward surface and a radially outward surface ; and a spring retainer radially circumscribing the radially outward surface of each of the plurality of discrete segments in the segmented ring; a plurality of discrete segments forming a segmented ring, wherein each of the plurality of discrete segments comprises a radially inward surface and a radially outward surface ; and a spring retainer radially circumscribing the radially outward surface of each of the plurality of discrete segments in the segmented ring; characterized in that an annular wedge is provided that movably circumscribes the shank , the annular wedge comprising: a proximal wedge surface having a first wedge circumference; a distal wedge surface having a second wedge circumference less than the first wedge circumference; an exterior surface , wherein the exterior surface connects the proximal wedge surface with the distal wedge surface ; and wherein the exterior surface of the annular wedge abuts the radially inward surface of each of the plurality of discrete segments of the discrete segment assembly. a proximal wedge surface having a first wedge circumference; a distal wedge surface having a second wedge circumference less than the first wedge circumference; an exterior surface , wherein the exterior surface connects the proximal wedge surface with the distal wedge surface ; and wherein the exterior surface of the annular wedge abuts the radially inward surface of each of the plurality of discrete segments of the discrete segment assembly. <EOS>