Laboratory instrument for the preparation of samples

• US 8,551,421 B2
• Filed: 05/12/2011
• Issued: 10/08/2013
• Est. Priority Date: 05/20/2010
• Status: Active Grant

• Current Assignee: Mettler Toledo GmbH
• Original Assignee: Mettler-Toledo AG (Mettler-Toledo International Inc.)
• Inventors: Lchinger, Paul
• Primary Examiner(s): WRIGHT, PATRICIA KATHRYN
• Application Number:
  US13/106,698
• Publication Number:
  US 20110286886A1
• Time in Patent Office: 880 Days
• Field of Search: None
• US Class Current: 422/500
• CPC Class Codes: G01G 19/00 Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups electric measuring arrangements involving comparison with a reference value G01R17/00
• CPC Class Codes: G01G 21/00 Details of weighing apparatus
• CPC Class Codes: G01G 23/00 Auxiliary devices for weighing apparatus

Abstract

A laboratory instrument for the preparation of samples includes a base housing with a work compartment enclosed by protective walls, at least one multifunctional work head having the ability to turn about a rotary axis pivotally supported on the base housing. At least two defined functional positions that can be aligned with at least one container platform which is arranged in the work compartment. The first functional position contains a receiving device which serves to hold a dosage-dispensing device with free-flowing dosage material, and each of the other functional positions contains an additional device. At least one of the protective walls has a cutout opening, and the at least one multifunctional work head is arranged partially in the cutout, so that portions of the at least one multifunctional work head lies both inside and outside of the work compartment.

Claims

1. A laboratory instrument, comprising:

a base housing, said base housing including;

a work compartment enclosed by protective walls;

at least one multifunctional work head having a rotary axis and at least two defined functional positions thereon, said at least one multifunctional work head pivotally supported on the base housing so as to turn about said rotary axis;

at least one cutout in at least one of said protective walls, said at least one multifunctional work head, having a first part and a second part, arranged in said at least one cutout so that at least one of said first part or said second part remain in said work compartment during rotation of said multifunctional work head;

an at least one container platform, said at least one container platform arranged in said work compartment, whereby turning the multifunctional work head each of the at least two defined functional positions can be aligned with at least one container;

a sealing device arranged in the area of the at least one cutout;

a receiving device residing in at least one functional position of said at least two defined functional positions; and

a dosage-dispensing device held by said receiving device having a free-flowing dosage material therein.

2. The laboratory instrument of claim 1, further comprising a weighing cell arranged in said base housing, said weighing cell tied to said at least one container platform through a force-transmitting connection.

3. The laboratory instrument of claim 1, wherein the rotary axis of the at least one multifunctional work head is oriented horizontally.

4. The laboratory instrument of claim 1, wherein the at least one cutout extends into at least two adjacent protective walls.

5. The laboratory instrument of claim 1, wherein the at least one multifunctional work head is capable of linear sliding movement and/or pivoting movement so as to set free at least part of an opening of the at least one cutout.

6. The laboratory instrument of claim 1, wherein at least one functional position of said at least one multifunctional work head has an access clearance serving to set free at least part of an opening of said at least one cutout.

7. The laboratory instrument of claim 1, wherein said at least one multifunctional work head is capable of linear sliding movement along the rotary axis and further comprises a first plane and at least one second plane, said planes are oriented orthogonal to said rotary axis, wherein at least one functional position is formed in the first plane and another at least one functional position is formed in the at least one second plane on the at least one multifunctional work head.

8. The laboratory instrument of claim 1, wherein said sealing device is arranged between said protective walls and the at least one multifunctional work head.

9. The laboratory instrument of claim 8, wherein said sealing device is an elastic sealing strip, sealing brush, or sealing roller.

10. The laboratory instrument of claim 8, wherein said sealing device completely covers the at least one cutout and spans over a portion of the at least one multifunctional work head which lies outside of the work compartment.

11. The laboratory instrument of claim 1, further comprising a cleaning device, said cleaning device in proximity to said sealing device, wherein said cleaning device serves to clean said at least one multifunctional work head and/or said sealing device.

12. The laboratory instrument of claim 1, wherein the at least one multifunctional work head has a cylindrical shape.

13. The laboratory instrument of claim 1, wherein at least one functional position of said at least two defined functional positions include a device, wherein said device is a receiving device for a dosage-dispensing device, an electro-optical unit to identify and/or to position a target container on said container platform, a device to remove or to put on a closure seal of a target container, a gripper serving to grip objects, a dosage-dispensing device for liquids, a receiving device for a dosage-dispensing device for liquids, at least the outlet opening of a dosage-dispensing device for liquids, a sensor serving to detect electrostatic charges, an ionizer, an identification device, a distance sensor, or a cleaning device.

14. The laboratory instrument of claim 1, wherein said at least one multifunctional work head comprises at least one connector for a source container or a connecting conduit.

15. The laboratory instrument of claim 1, wherein said at least one multifunctional work head is arranged on said base housing, said at least one multifunctional work head capable of being moved vertically up and down relative to said at least one container platform.

16. The laboratory instrument of claim 1, wherein said at least one protective wall including said at least one cutout is vertically movable together with said at least one multifunctional work head.

17. The laboratory instrument of claim 1, wherein said at least one container platform is capable of vertical movement relative to said at least one multifunctional work head.