Multichannel pipette

Patent metadata

Field	Value
Publication number	US-10786810-B2
Application number	US-201615774911-A
Country	US
Kind code	B2
Filing date	Jan 7, 2016
Priority date	Jan 7, 2016
Publication date	Sep 29, 2020
Grant date	Sep 29, 2020

Abstract

Provided is a multichannel pipette whose number of channels can be arbitrarily set and managed to improve usability of the multichannel pipette and improve productivity, quality control, and maintainability in a research site. A multichannel pipette includes a pipette main body, a lower part attached to a lower end portion of the pipette main body, and a plurality of chip holder units housed inside the lower part, wherein each of the chip holder units has a connecting portion attachable to and removable from any of a plurality of to-be-connected portions provided in a unit case inside the lower part, and each of the chip holder units is attachable to and removable from the lower part.

First claim

The invention claimed is:

1. A multichannel pipette comprising:
a pipette main body that houses a drive section;
a lower part attached to a lower end portion of the pipette main body;
a unit case having a movable portion provided inside the lower part and joined to a lower end portion of the drive section, the movable portion having a plurality of to-be-connected portions; and
a plurality of chip holder units housed in the unit case and each including a piston, a cylinder in which the piston slides, a chip holder attached to a lower end portion of the cylinder, and a connecting portion attachable to and removable from any of the plurality of to-be-connected portions,
wherein each of the chip holder units has a convex switch that is biased by an elastic member radially outward of the chip holder unit and is formed on an outer circumferential surface of the chip holder unit, and
wherein a plurality of switch window portions to allow pressing on the switches are formed in the lower part.

2. The multichannel pipette according to claim 1 ,
wherein each of the convex switches is provided on a switch forming member provided on the outer circumferential surface of the chip holder unit, a projecting engagement portion extending radially outward of the chip holder unit is formed on an outer circumferential surface of the switch forming member, and a plurality of guide portions that guide each of the projecting engagement portions in the up-down direction are formed on the unit case.

3. The multichannel pipette according to claim 1 , wherein a lip packing having a substantially U-shaped section is provided at a lower end portion of the chip holder.

4. The multichannel pipette according to claim 1 , wherein the connecting portion and the to-be-connected portion are connected by a magnetic force.

5. A multichannel pipette comprising:
a pipette main body that houses a drive section;
a lower part attached to a lower end portion of the pipette main body;
a unit case having a movable portion provided inside the lower part and joined to a lower end portion of the drive section, the movable portion having a plurality of to-be-connected portions; and
a plurality of chip holder units housed in the unit case and each including a piston, a cylinder in which the piston slides, a chip holder attached to a lower end portion of the cylinder, and a connecting portion attachable to and removable from any of the plurality of to-be-connected portions,
wherein switch forming members are provided corresponding to the chip holder units,
on each of the switch forming members, a convex switch to be biased by an elastic member radially outward of the chip holder unit is formed at one end portion, and an engagement hole is formed at another end portion,
on each of the chip holder units, a chip-holder-side claw portion that engages in the engagement hole at the time of biasing by the elastic member is formed, and
in the lower part, a plurality of switch window portions to allow pressing on each of the convex switches are formed.

6. The multichannel pipette according to claim 5 , wherein a lip packing having a substantially U-shaped section is provided at a lower end portion of the chip holder.

7. The multichannel pipette according to claim 5 , wherein the connecting portion and the to-be-connected portion are connected by a magnetic force.

8. A multichannel pipette comprising:
a pipette main body that houses a drive section;
a lower part attached to a lower end portion of the pipette main body;
a unit case having a movable portion provided inside the lower part and joined to a lower end portion of the drive section, the movable portion having a plurality of to-be-connected portions; and
a plurality of chip holder units housed in the unit case and each including a piston, a cylinder in which the piston slides, a chip holder attached to a lower end portion of the cylinder, and a connecting portion attachable to and removable from any of the plurality of to-be-connected portions,
wherein openings, each having sliding switches, are formed corresponding to the chip holder units,
on a rear face of each of the sliding switches, a pressing convex portion that protrudes inwardly of the chip holder unit is formed, and on a rear face of an opening end portion of the opening in a sliding direction of each of the sliding switches, a case-side claw portion that protrudes inwardly of the chip holder unit is formed,
on each of the chip holder units, a chip holder-side claw portion that warps outwardly of the chip holder unit is formed, and each of the chip-side claw portions is engaged with each of the case-side claw portions, and
in the lower part, a plurality of switch window portions to allow pressing on each of the sliding switches are formed, and
by sliding each of the sliding switches, the pressing convex portion makes the chip-holder-side claw portion warp, and engagement between the chip-holder-side claw portion and the case-side claw portion is released.

9. The multichannel pipette according to claim 8 , wherein a lip packing having a substantially U-shaped section is provided at a lower end portion of the chip holder.

10. The multichannel pipette according to claim 8 , wherein the connecting portion and the to-be-connected portion are connected by a magnetic force.

Assignees

• A&D Co Ltd

Inventors

• Izumo Naoto
• Oda Hisanori

Classifications

• B01L3/0217 Primary

  of the plunger pump type · CPC title

• B01L2200/087

  Ergonomic aspects · CPC title

• G01N1/00

  Sampling; Preparing specimens for investigation · CPC title

• B01L2200/028

  Modular arrangements · CPC title

• B01L2300/0832

  cylindrical, tube shaped · CPC title