Weighing chamber base and draft shield for a precision balance as well as a precision balance

Patent metadata

Field	Value
Publication number	US-10119854-B2
Application number	US-201615164245-A
Country	US
Kind code	B2
Filing date	May 25, 2016
Priority date	Nov 25, 2013
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

A weighing chamber base ( 34 ) for a precision balance ( 10 ) has a weighing base section ( 98 ) and two side cheeks ( 100 ), which extend perpendicularly from the weighing base section, and which are arranged on opposite edges ( 102 ) of the weighing base section outside the draft shield ( 12 ). Also, a draft shield ( 12 ) that has such a weighing chamber base ( 34 ), and has at least one side panel ( 26 ), which can be moved between an open position and a closed position. The side cheeks of the weighing chamber base form a section of the side walls ( 22 ) of the draft shield ( 12 ).

First claim

What is claimed is:

1. A weighing chamber base for a draft shield of a precision balance, comprising:
a weighing base section and
two side cheeks, which both extend perpendicularly from the weighing base section, which are arranged respectively on opposite edges of the weighing base section, which are located outside of the draft shield, and which are configured as fastening devices for securing the draft shield, and forming respective jaws of a clamp;
wherein the side cheeks are resiliently flexible towards and away from one another.

2. The weighing chamber base, as claimed in claim 1 , wherein the weighing base section comprises a passage opening for a weighing process-specific system.

3. The weighing chamber base, as claimed in claim 2 , wherein the weighing base section is raised relative to the weighing chamber base in a region of the passage opening.

4. The weighing chamber base, as claimed in claim 1 , wherein an edge of the weighing base section is raised at least in sections of the edge.

5. The weighing chamber base, as claimed in claim 1 , further comprising a stop face and/or a guide for a movable side panel on least one of the side cheeks.

6. The weighing chamber base, as claimed in claim 5 , wherein the stop face and/or the guide is/are formed by at least sections of a surface of the side cheek that extends perpendicularly to the weighing base section.

7. The weighing chamber base, as claimed in claim 1 , wherein the weighing chamber base is made of a unitary piece of plastic.

8. A draft shield for a precision balance comprising:
a weighing chamber base as claimed in claim 1 ,
at least one side panel, configured to move between an open position and a closed position, and
side walls,
wherein the side cheeks of the weighing chamber base form a section of the side walls of the draft shield.

9. The draft shield, as claimed in claim 8 , wherein the side panel is arranged flush against a guide or a stop face, which is provided on one of the side cheeks.

10. The draft shield, as claimed in claim 8 , wherein the draft shield further comprises a guide rail for the side panel, wherein the side panel is mounted with a top edge in the guide rail and with a bottom edge arranged flush against a guide or a stop face of the weighing chamber base.

11. The draft shield, as claimed in claim 10 , wherein, in a plan view, the stop face or the guide projects beyond the guide rail.

12. A precision balance, comprising:
a housing having side walls, and
a weighing chamber base as claimed in claim 1 ,
wherein the side cheeks of the weighing chamber base form a section of the side walls of the housing.

13. A precision balance, comprising:
a housing having side walls, and
a draft shield as claimed in claim 8 ,
wherein the side cheeks of the weighing chamber base form a section of the side walls of the housing.

14. The weighing chamber base, as claimed in claim 1 , wherein the side cheeks comprise mutually facing inner surfaces and wherein the fastening devices comprise projections extending along respective edges, which are distal to the weighing base section, of the inner surfaces of the side cheeks.

15. The precision balance, as claimed in claim 12 , further comprising:
a weighing device removably clamped between the two side cheeks of the weighing chamber base.

16. The precision balance, as claimed in claim 15 ,
wherein the side cheeks comprise mutually facing inner surfaces and wherein the fastening devices comprise projections extending along respective edges, which are distal to the weighing base section, of the inner surfaces of the side cheeks, and
wherein the weighing device comprises locking edges positioned to engage the projections when the weighing chamber base is lowered onto the weighing device into an assembled position.

17. The precision balance, as claimed in claim 13 , further comprising:
a weighing device removably clamped between the two side cheeks of the weighing chamber base.

18. The precision balance, as claimed in claim 17 ,
wherein the side cheeks comprise mutually facing inner surfaces and wherein the fastening devices comprise projections extending along respective edges, which are distal to the weighing base section, of the inner surfaces of the side cheeks, and
wherein the weighing device comprises locking edges positioned to engage the projections when the weighing chamber base is lowered onto the weighing device into an assembled position.

Assignees

• Sartorius Lab Instr Gmbh & Co Kg

Inventors

• Kuhlmann Otto
• Laubstein Michael
• Von Steuben Jan

Classifications

• G01G21/286 Primary

  with windshields · CPC title