IP Library Granted Patent US 8,912,455
Granted Patent B2
US 8,912,455 · App. 12/793,966 · Granted Dec 16, 2014

Scale with an adjusting device configured as a fluid drive actuator imparting gearless translational motion to place the scale in a washing-down position or in a transport position

Inventors: Michael Laubstein (Goettingen, DE); Juergen Lauke (Rosdorf, DE)
Assignee: Sartorius Lab Instruments GmbH & Co. KG
G01G21/286Y10S901/22
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Quick Facts
Patent No.
US 8,912,455
App. No.
12/793,966
Granted
Dec 16, 2014
Kind
B2
Abstract

A balance having at least one adjusting device ( 2 , . . . ) having a drive, wherein the drive of the adjusting device is configured as a fluidic drive ( 4 , . . . ), to which pressure can be applied by a pressure source disposed outside the scales via a pressure connection.

Claims (48)

1. A set of scales, configured as a precision balance or an analytical balance, for weighing a load to be weighed comprising:

at least one component integral to the set of scales,

a scales unit housing, and

at least one adjusting device having a respective drive,

wherein each said drive of each said adjusting device consists of a gearless, non-pivoting actuator configured as a respective fluid drive,

wherein each said drive is arranged within the scales unit housing and in communication with at least one pressure connection configured to apply pressure to said respective drive from a pressure source arranged outside the scales unit housing, and

wherein each said adjusting device is configured to impart exclusively translational motion to said at least one component.

2. The set of scales as claimed in claim 1 , wherein the drive is configured as a one-sided pressure cylinder working against a spring and wherein the actuator is longitudinally displaceable.

3. The set of scales as claimed in claim 1 , wherein the drive is configured as a two-sided pressure cylinder and wherein the actuator is longitudinally displaceable.

4. The set of scales as claimed in claim 1 , further comprising at least one control valve connected upstream of the drive.

5. The set of scales as claimed in claim 1 , wherein the drive is coupled to at least one damping member configured to dampen the translational motion.

6. The set of scales as claimed in claim 5 , wherein the damping member is configured as a throttle valve.

7. The set of scales as claimed in claim 4 , further comprising at least one position sensor arranged to detect end positions of the adjusting device.

8. The set of scales as claimed in claim 1 , wherein the position of the actuator of the adjusting device is a time-dependent determination.

9. A set of scales, configured as a precision balance or an analytical balance, for weighing a load to be weighed comprising:

a component integral to the set of scales,

a scales unit housing, and

an adjusting device having a drive,

wherein the drive of the adjusting device comprises a gearless actuator configured as a fluid drive,

wherein the drive is arranged within the scales unit housing and in communication with a pressure connection configured to apply pressure to the drive from a pressure source arranged outside the scales unit housing,

wherein the adjusting device is configured to impart translational motion to the component, and

wherein the component is a wall element of a wind shield of the scales unit housing.

10. The set of scales as claimed in claim 1 , wherein the component is at least one weight in a weight switching system.

11. The set of scales as claimed in claim 10 , further comprising a weight support configured to receive the weight arranged to be lowered and raised by the adjusting device, wherein the weight is provided on a force transmitting point of the set of scales.

12. The set of scales as claimed in claim 11 , wherein the weight support is arranged to be lowered and raised through tilting about a tilt axis.

13. A set of scales, configured as a precision balance or an analytical balance, for weighing a load to be weighed, comprising:

a component integral to the set of scales,

a scales unit housing, and

an adjusting device having a drive,

wherein the drive of the adjusting device comprises a gearless actuator configured as a fluid drive,

wherein the drive is arranged within the scales unit housing and in communication with a pressure connection configured to apply pressure to the drive from a pressure source arranged outside the scales unit housing,

wherein the adjusting device is configured to impart translational motion to the component, and

wherein, in a washing-down position, a load support is pressed by the actuator of the adjusting device with a rearward sealing edge facing toward the scales unit housing against a seal arranged between the load support and the scales unit housing in sealing manner.

14. The set of scales as claimed in claim 13 , wherein the load support comprises, at the support axis bearing the load support, a contact surface against which the actuator rests in the washing-down position, in accordance with a spring pull extending in parallel to the support axis.

15. A set of scales, configured as a precision balance or an analytical balance, for weighing a load to be weighed comprising:

a component integral to the set of scales,

a scales unit housing, and

an adjusting device having a drive,

wherein the drive of the adjusting device comprises a gearless actuator configured as a fluid drive,

wherein the drive is arranged within the scales unit housing and in communication with a pressure connection configured to apply pressure to the drive from a pressure source arranged outside the scales unit housing,

wherein the adjusting device is configured to impart translational motion to the component,

wherein the adjusting device is configured as a transport securing device, which locks the set of scales in a pressure-free condition by spring force, and

wherein, for locking, the actuator of the adjusting device is configured to:

engage in locking manner in a corresponding aperture of a load transmitting lever of a weighing system and/or

press the load transmitting lever of the weighing system against a contact surface.

16. The set of scales as claimed in claim 15 , wherein, for locking, the actuator of the adjusting device is configured to engage in locking manner in the corresponding aperture of the load transmitting lever of the weighing system.

17. The set of scales as claimed in claim 15 , wherein, for locking, the actuator of the adjusting device is configured to press the load transmitting lever of the weighing system against the contact surface.

18. The set of scales as claimed in claim 1 , wherein the fluid drive comprises at least one of a pneumatic drive and a hydraulic drive.

Assignments (4)
CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNOR PREVIOUSLY RECORDED ON REEL 032251 FRAME 0219. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNEE INTEREST. Recorded Mar 6, 2014
From: SARTORIUS WEIGHING TECHNOLOGY GMBH
To: SARTORIUS LAB INSTRUMENTS GMBH & CO. KG
Reel/Frame 032398/0812 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 12, 2014
From: SARTORIUS WEIGING TECHNOLOGY GMBH
To: SARTORIUS LAB INSTRUMENTS GMBH & CO. KG
Reel/Frame 032251/0219 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 13, 2011
From: SARTORIUS AG
To: SARTORIUS WEIGHING TECHNOLOGY GMBH
Reel/Frame 026587/0380 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 9, 2010
From: LAUBSTEIN, MICHAEL; LAUKE, JUERGEN
To: SARTORIUS AG
Reel/Frame 024657/0351 →
Priority Claims (1)
DE 10 2007 058 330 · Dec 4, 2007 · national
Continuity (2)
Continuation PCTEP2008008702 · Oct 15, 2008
Related Publication 20110132669A1 · Jun 9, 2011