Abstract: Pipette tip coupler and a disposable pipette tip for a pipette device comprises a stepped coupler shoulder complementary to an axially stepped pipette tip shoulder; a plurality of circumferentially disposed elements or segments carried by the coupler at a location superior to the coupler shoulder; and a distal elastomeric element carried by the coupler at a location distal to the coupler shoulder wherein the plurality of elements or segments have a circumferential, radially translated state that provides an abutment with a first working surface formed in the interior surface of the tip while compressing the distal elastomeric element into sealing abutment with a second working surface formed in the interior surface of the tip and while abutting the proximally facing axial stop surface of the tip with the distally facing axial stop surface of the coupler to define an axial coupling position of the pipette tip on the pipette device.

Abstract: Pipette tip couplers, pipette tips, coupler and tip combinations, and methods for coupling and decoupling a pipette tip to or from, respectively, a pipette tip coupler mounted on a pipette device, are disclosed. The pipette tip couplers include an elastomeric element and an annular ring shaped raceway. When the pipette tip is mounted on the pipette tip coupler, the annular ring shaped raceway abuts a first portion of the interior surface of the circumscribing sidewall of the pipette tip, and the elastomeric element abuts a second portion of the interior surface of the circumscribing sidewall of the pipette tip.

Abstract: Pipette tip coupler and a disposable pipette tip for a pipette device comprises a stepped coupler shoulder complementary to an axially stepped pipette tip shoulder; a plurality of circumferentially disposed elements or segments carried by the coupler at a location superior to the coupler shoulder; and a distal elastomeric element carried by the coupler at a location distal to the coupler shoulder wherein the plurality of elements or segments have a circumferential, radially translated state that provides an abutment with a first working surface formed in the interior surface of the tip while compressing the distal elastomeric element into sealing abutment with a second working surface formed in the interior surface of the tip and while abutting the proximally facing axial stop surface of the tip with the distally facing axial stop surface of the coupler to define an axial coupling position of the pipette tip on the pipette device.

Abstract: Pipette tip couplers, pipette tips, coupler and tip combinations, and methods for coupling and decoupling a pipette tip to or from, respectively, a pipette tip coupler mounted on a pipette device. The pipette tip couplers include an elastomeric element, an annular crown shaped raceway, and a coupler stop shoulder surface. The pipette tips include a groove in a first cylindrical section, a second cylindrical section, a tip stop shoulder surface at the interface of the first and second cylindrical sections, a third cylindrical section, a sealing seat surface at the interface of the second and third cylindrical sections, and a fourth section adjacent to the third cylindrical section. When the pipette tip is mounted on the pipette tip coupler, the annular crown shaped raceway abuts the tip groove, the coupler stop shoulder surface abuts the tip stop shoulder surface, and the elastomeric element abuts the sealing seat surface.

Abstract: Pipette tip couplers, pipette tips, coupler and tip combinations, and methods for coupling and decoupling a pipette tip to or from, respectively, a pipette tip coupler mounted on a pipette device. The pipette tip couplers include an elastomeric element, a discrete segment assembly, and a coupler stop shoulder surface. The pipette tips include a groove in a first cylindrical section, a second cylindrical section, a tip stop shoulder surface at the interface of the first and second cylindrical sections, a third cylindrical section, a sealing seat surface at the interface of the second and third cylindrical sections, and a fourth section adjacent to the third cylindrical section. When the pipette tip is mounted on the pipette tip coupler, the discrete segment assembly abuts the tip groove, the coupler stop shoulder surface abuts the tip stop shoulder surface, and the elastomeric element abuts the sealing seat surface.

Abstract: Pipette tip couplers, pipette tips, coupler and tip combinations, and methods for coupling and decoupling a pipette tip to or from, respectively, a pipette tip coupler mounted on a pipette device. The pipette tip couplers include an elastomeric element, a discrete segment assembly, and a coupler stop shoulder surface. The pipette tips include a groove in a first cylindrical section, a second cylindrical section, a tip stop shoulder surface at the interface of the first and second cylindrical sections, a third cylindrical section, a sealing seat surface at the interface of the second and third cylindrical sections, and a fourth section adjacent to the third cylindrical section. When the pipette tip is mounted on the pipette tip coupler, the discrete segment assembly abuts the tip groove, the coupler stop shoulder surface abuts the tip stop shoulder surface, and the elastomeric element abuts the sealing seat surface.

Abstract: Pipette tip coupler and a disposable pipette tip for a pipette device comprises a stepped coupler shoulder complementary to an axially stepped pipette tip shoulder; a plurality of circumferentially disposed elements or segments carried by the coupler at a location superior to the coupler shoulder; and a distal elastomeric element carried by the coupler at a location distal to the coupler shoulder wherein the plurality of elements or segments have a circumferential, radially translated state that provides an abutment with a first working surface formed in the interior surface of the tip while compressing the distal elastomeric element into sealing abutment with a second working surface formed in the interior surface of the tip and while abutting the proximally facing axial stop surface of the tip with the distally facing axial stop surface of the coupler to define an axial coupling position of the pipette tip on the pipette device.

Abstract: Pipette tip coupler and a disposable pipette tip for a pipette device comprises a stepped coupler shoulder complementary to an axially stepped pipette tip shoulder; a plurality of circumferentially disposed elements or segments carried by the coupler at a location superior to the coupler shoulder; and a distal elastomeric element carried by the coupler at a location distal to the coupler shoulder wherein the plurality of elements or segments have a circumferential, radially translated state that provides an abutment with a first working surface formed in the interior surface of the tip while compressing the distal elastomeric element into sealing abutment with a second working surface formed in the interior surface of the tip and while abutting the proximally facing axial stop surface of the tip with the distally facing axial stop surface of the coupler to define an axial coupling position of the pipette tip on the pipette device.

Abstract: Pipette tip couplers, pipette tips, coupler and tip combinations, and methods for coupling and decoupling a pipette tip to or from a pipette tip coupler mounted on a pipette device. The pipette tip couplers include a shank, a coupler body distal to the shank, a distal stem and distal end plate distal to the coupler body, a proximal elastomeric element disposed around the shank, a distal elastomeric element disposed around the distal stem, and a coupler stop shoulder surface between the proximal elastomeric element and distal elastomeric element. When a pipette tip is mounted on the pipette tip coupler, the proximal elastomeric element abuts the interior surface of the pipette tip for securing the pipette tip to the coupler, and the distal elastomeric element abuts the interior surface of the pipette tip to form a seal between the coupler and the pipette tip.

Abstract: Pipette tip couplers, pipette tips, coupler and tip combinations, and methods for coupling and decoupling a pipette tip to or from an expanding mandrel collet coupling device. The pipette tip couplers include a central body, a spacer with cogs circumscribing the central body, an expanding mandrel collet circumscribing the spacer having an annular base and circumferentially spaced apart upwardly extending collet arms, and an elastomeric element circumscribing the central body. The cogs protrude through spaces between the collet arms. The collet arms are attached to the annular base and configured to expand between a first and a second circumference for engaging a first interior surface of the tip, with the elastomeric element sealing against a second interior surface below the first surface, and with an abutment between the cogs and a stepped interior shoulder of the pipette tip disposed between the first and second interior surfaces.

Abstract: Pipette tip couplers, pipette tips, coupler and tip combinations, and methods for coupling and decoupling a pipette tip to or from, respectively, a pipette tip coupler mounted on a pipette device. The pipette tip couplers include an elastomeric element, a discrete segment assembly, and a coupler stop shoulder surface. The pipette tips include a groove in a first cylindrical section, a second cylindrical section, a tip stop shoulder surface at the interface of the first and second cylindrical sections, a third cylindrical section, a sealing seat surface at the interface of the second and third cylindrical sections, and a fourth section adjacent to the third cylindrical section. When the pipette tip is mounted on the pipette tip coupler, the discrete segment assembly abuts the tip groove, the coupler stop shoulder surface abuts the tip stop shoulder surface, and the elastomeric element abuts the sealing seat surface.

Abstract: Pipette tip couplers, pipette tips, coupler and tip combinations, and methods for coupling and decoupling a pipette tip to or from an expanding mandrel collet coupling device. The pipette tip couplers include a central body, a spacer with cogs circumscribing the central body, an expanding mandrel collet circumscribing the spacer having an annular base and circumferentially spaced apart upwardly extending collet arms, and an elastomeric element circumscribing the central body. The cogs protrude through spaces between the collet arms. The collet arms are attached to the annular base and configured to expand between a first and a second circumference for engaging a first interior surface of the tip, with the elastomeric element sealing against a second interior surface below the first surface, and with an abutment between the cogs and a stepped interior shoulder of the pipette tip disposed between the first and second interior surfaces.

Abstract: Pipette tip couplers, pipette tips, coupler and tip combinations, and methods for coupling and decoupling a pipette tip to or from a pipette tip coupler mounted on a pipette device. The pipette tip couplers include a shank, a coupler body distal to the shank, a distal stem and distal end plate distal to the coupler body, a proximal elastomeric element disposed around the shank, a distal elastomeric element disposed around the distal stem, and a coupler stop shoulder surface between the proximal elastomeric element and distal elastomeric element. When a pipette tip is mounted on the pipette tip coupler, the proximal elastomeric element abuts the interior surface of the pipette tip for securing the pipette tip to the coupler, and the distal elastomeric element abuts the interior surface of the pipette tip to form a seal between the coupler and the pipette tip.

Abstract: Pipette tip couplers, pipette tips, coupler and tip combinations, and methods for coupling and decoupling a pipette tip to or from an expanding mandrel pipette tip coupler mounted on a pipette device. The pipette tip couplers include circumferentially spaced apart segments for engaging an interior surface of a pipette tip, an annular base disposed below the segments, a distal elastomeric element disposed around a distal stem portion for sealing against the interior surface of the pipette tip, upwardly extending circumferentially spaced apart arms each supporting a different segment, and a stop disk for abutting a stop shoulder in a pipette tip. The pipette tips include a groove in a first cylindrical section, a second cylindrical section, a pipette tip stop shoulder surface, a third cylindrical section, and a sealing seat surface.

Abstract: Pipette tip couplers, pipette tips, coupler and tip combinations, and methods for coupling and decoupling a pipette tip to or from, respectively, a pipette tip coupler mounted on a pipette device. The pipette tip couplers include an elastomeric element, an annular crown shaped raceway, and a coupler stop shoulder surface. The pipette tips include a groove in a first cylindrical section, a second cylindrical section, a tip stop shoulder surface at the interface of the first and second cylindrical sections, a third cylindrical section, a sealing seat surface at the interface of the second and third cylindrical sections, and a fourth section adjacent to the third cylindrical section. When the pipette tip is mounted on the pipette tip coupler, the annular crown shaped raceway abuts the tip groove, the coupler stop shoulder surface abuts the tip stop shoulder surface, and the elastomeric element abuts the sealing seat surface.

Abstract: Pipette tip couplers, pipette tips, coupler and tip combinations, and methods for coupling and decoupling a pipette tip to or from a pipette tip coupler mounted on a pipette device. The pipette tip couplers include a proximal elastomeric element, a distal elastomeric element, and a coupler stop shoulder surface between the elastomeric elements. The pipette tips include a groove in a first cylindrical section, a second cylindrical section, a tip stop shoulder surface at the interface of the first and second cylindrical sections, a third cylindrical section distal to the second cylindrical section, and a sealing seat surface at the interface of the second and third cylindrical sections. When the pipette tip is mounted on the pipette tip coupler, the proximal elastomeric element abuts the tip groove, the coupler stop shoulder surface abuts the tip stop shoulder surface, and the distal elastomeric element abuts the sealing seat surface.

Abstract: Pipette tip couplers, pipette tips, coupler and tip combinations, and methods for coupling and decoupling a pipette tip to or from, respectively, a pipette tip coupler mounted on a pipette device. The pipette tip couplers include an elastomeric element, a discrete segment assembly, and a coupler stop shoulder surface. The pipette tips include a groove in a first cylindrical section, a second cylindrical section, a tip stop shoulder surface at the interface of the first and second cylindrical sections, a third cylindrical section, a sealing seat surface at the interface of the second and third cylindrical sections, and a fourth section adjacent to the third cylindrical section. When the pipette tip is mounted on the pipette tip coupler, the discrete segment assembly abuts the tip groove, the coupler stop shoulder surface abuts the tip stop shoulder surface, and the elastomeric element abuts the sealing seat surface.

Abstract: Pipette assembly comprising a pipette device, a pipette tip, and an expanding mandrel collet coupling device coupling the tip to the pipette device, the coupling device comprising a central body, a spacer with cogs circumscribing a central body, an expanding mandrel collet circumscribing the spacer having an annular base and circumferentially spaced apart upwardly extending collet arms wherein the cogs protrude through spaces between the arms, and an elastomeric element circumscribing the central body. The collet arms are attached to the annular base and configured to expand between a first and a second greater circumference for engaging a first interior working surface of the tip in concurrence with the elastomeric element sealing against a second interior working surface below the first surface and in concurrence with an abutment between the cogs and a stepped interior shoulder of the pipette tip disposed between the first and second working surfaces.

Abstract: The invention is directed to a pipette assembly that includes a pipette device, a pipette tip, and an expanding mandrel collet coupling device coupling the tip to the pipette device, the coupling device comprising a central body, a spacer with cogs circumscribing a central body, an expanding mandrel collet circumscribing the spacer having an annular base and circumferentially spaced apart upwardly extending collet arms wherein the cogs protrude through spaces between the arms, and an elastomeric element circumscribing the central body. The collet arms are attached to the annular base and configured to expand between a first and a second greater circumference for engaging a first interior working surface of the tip in concurrence with the elastomeric element sealing against a second interior working surface below the first surface and in concurrence with an abutment between the cogs and a stepped interior shoulder of the pipette tip disposed between the first and second working surfaces.

Abstract: Pipette assembly comprising a pipette device, a pipette tip, and an expanding mandrel collet coupling device coupling the tip to the pipette device, the coupling device comprising: circumferentially spaced apart segments, an annular base disposed below the segments and comprising a distal portion, an elastomeric element circumscribing the distal portion, and upwardly extending circumferentially spaced apart arms attached at first ends to the annular base and having upper free ends each supporting a different one of the segments configured to expand between a first and a second greater circumference for engaging a first interior working surface of the tip in concurrence with the elastomeric element sealing against a second interior working surface below the first surface and in concurrence with an abutment between a disk exteriorly disposed about a medial portion of the arms and a stepped interior shoulder of the tip disposed between the first and second working surfaces.