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US4754657A
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US
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Disintegration testing device
Assignee: ERWEKA APPARATEBAU A CORP OF GERMANY GmbH
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Filing: 1986-06-02
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Granted: 1988-07-05
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Expires: 2006-06-02
Abstract
Abstract A disintegration testing device for samples (20), in particular tablets, in which the samples (20) provided in a disintegration cage (10) inserted into a solvent, are positioned between a Hall generator (27) and a disk (21) having a magnet (28). When the sample (20) disintegrates the disk together with the magnet (28) approaches the Hall generator (27) so that the magnet (28) emits a signal which upon exceeding a switching threshold value is fed to a recording device and is displayed at display units (26). The disintegration cage (10) is removably arranged at the disintegration testing device and has no wired connections. The transmission of the energy for the electric circuitries in the disintegration cage (10) is provided by using contacts or by means of a high-frequency emitter and a high-frequency receiver. The transmission of the signals to the recording device is effected by means of opto-electronic components, in particular an infrared light bridge.
Inventors
- 👤 Ortwin Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:06
CPC Classifications
G; G01; G01N; G01N13/00; G01N33/00; G01N33/15; G01N2013/006
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
178 words
A disintegration testing device for testing the disintegration of samples of solid material that disintegrate in a solvent which comprises: a support structure including a mount member; a container supported by said support structure for containing solvent; a disintegration cage supported by said mount member for being submerged into said solvent contained in said container, wherein said disintegration cage includes at least one Hall generator disposed at a lower part of said disintegration cage, and at least one disk corresponding to said Hall generator and disposed above said Hall generator in said disintegration cage for positioning a sample between said disk and said Hall generator, said disk containing a magnet; and moving means operatively connected to said support structure and said disintegration cage for moving said disintegration cage when it is submerged in said solvent so as to cause said solvent to circumcirculate and flow about said sample; wherein upon disintegration of said sample in said solvent contained in said container, said magnet approaches said Hall generator which generates an electrical signal indicating the disintegration of said sample.
Claim 2
Dependent Claim
178 words
A disintegration testing device for testing the disintegration of samples of solid material that disintegrate in a solvent which comprises: a support structure including a mount member; a container supported by said support structure for containing solvent; a disintegration cage supported by said mount member for being submerged into said solvent contained in said container, wherein said disintegration cage includes at least one Hall generator disposed at a lower part of said disintegration cage, and at least one disk corresponding to said Hall generator and disposed above said Hall generator in said disintegration cage for positioning a sample between said disk and said Hall generator, said disk containing a magnet; and moving means operatively connected to said support structure and said disintegration cage for moving said disintegration cage when it is submerged in said solvent so as to cause said solvent to circumcirculate and flow about said sample; wherein upon disintegration of said sample in said solvent contained in said container, said magnet approaches said Hall generator which generates an electrical signal indicating the disintegration of said sample.
Claim 3
Dependent Claim
40 words
A dissolution testing device according to claim 1, wherein said magnet is disposed at the bottom side of said disk, and a screen for supporting said sample is disposed in said dissolution cage between said Hall generator and said disk.
Claim 4
Dependent Claim
69 words
A disintegration testing device according to claim 1, further comprising a transmission unit disposed on said mount member for supplying energy to said disintegration cage and for receiving signals from said disintegration cage indicating the disintegration of said sample, and a wireless means operatively associated with said transmission unit and said disintegration cage for effecting the transmission of energy and signals between said transmission unit and said disintegration cage.
Claim 5
Dependent Claim
15 words
A disintegration testing device according to claim 3, wherein said wireless means comprises opto-electronic components.
Claim 6
Dependent Claim
32 words
A disintegration testing device according to claim 3, wherein said wireless means comprises a high-frequency emitter operatively disposed in said transmission unit and a high-frequency receiver operatively disposed in said disintegration cage.
Claim 7
Dependent Claim
15 words
A disintegration testing device according to claim 3, wherein said wireless means comprises electrical contacts.
Claim 8
Dependent Claim
43 words
A disintegration testing device according to claim 1, wherein said disintegration cage includes electric circuit means operatively associated therewith for generating a signal indicating the disintegration of said sample from signals generated by said Hall generators based on a predetermined switching threshold value.
Claim 9
Dependent Claim
32 words
A disintegration testing device according to claim 7, wherein said disintegration cage includes display units operatively connected thereto for displaying information indicating the disintegration of said sample and said switching threshold values.
Claim 10
Dependent Claim
16 words
A disintegration testing device according to claim 8, wherein said display units comprise light emitting diodes.
Claim 11
Dependent Claim
28 words
A disintegration testing device according to claim 9, further comprising a recording device operatively connected to said disintegration testing device for measuring the disintegration time of said sample.
Claim 12
Dependent Claim
32 words
A disintegration testing device according to claim 10, further comprising a heating station operatively associated with said disintegration testing device for supporting and drying said disintegration cage upon removal of said solvent.
Claim 13
Dependent Claim
15 words
A disintegration testing device according to claim 11, wherein said heating station comprises a radiator.
Claim 14
Dependent Claim
140 words
A disintegration testing device according to claim 6, wherein said heating station comprises a radiator, said disintegration testing device further comprising a sample charging system operatively connected to said support structure for charging said disintegration cage with at least one sample, wherein said sample charging system includes a stationary member having first sample holes formed therein and a slidable member having second sample holes formed therein corresponding to said first sample holes, said slidable member being slidably mounted on said stationary member, and wherein said second sample holes only align with said first sample holes when said slidable member is moved to a charging position so as to allow said disk and said sample to drop into said disintegration cage, said disk and said sample being prevented from dropping into said disintegration cage when said sample holes are not aligned.
Claim 15
Dependent Claim
77 words
A disintegration testing device according to claim 13, wherein said disk includes a nozzle opening disposed above said magnet for providing an effective flow of solvent around said sample, and wherein said moving means comprises a lifting rod operatively connected to said disintegration cage in upward and downward directions, an eccentric member operatively connected to said lifting rod for moving said lifting rod, and a motor operatively connected to said eccentric member for moving said eccentric member.
Claim 16
Dependent Claim
130 words
A disintegration testing device according to claim 1, which further comprises a sample charging system operatively connected to said support structure for charging said disintegration cage with at least one sample, wherein said sample charging system includes a stationary member having first sample holes formed therein and a slidable member having second sample holes formed therein corresponding to said first sample holes, said slidable member being slidably mounted on said stationary member, and wherein said second sample holes only align with said first sample holes when said slidable member is moved to a charging position so as to allow said disk and said sample to drop into said disintegration cage, said disk and said sample being prevented from dropping into said disintegration cage when said sample holes are not aligned.
Claim 17
Dependent Claim
29 words
A disintegration testing device according to claim 1, wherein said disk includes a nozzle opening disposed above said magnet for providing an effective flow of solvent around said sample.
Claim 18
Dependent Claim
60 words
A disintegration testing device according to claim 1, wherein said moving means comprises a lifting rod operatively connected to said disintegration cage for moving said disintegration cage in upward and downward directions, an eccentric member operatively connected to said lifting rod for moving said lifting rod, and a motor operatively connected to said eccentric member for moving said eccentric member.
References Cited (Backward Citations)
US3618395A
Cited
US3742190A
Cited
US3791222A
Cited
US3791221A
Cited
US3802272A
Cited
DE2530065A1
Cited
US4247298A
Cited
US4335438A
Cited
US4279860A
Cited
DE3246731A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-05 | 1992-01-04 | 1992-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-05 | 1996-01-04 | 1996-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-05 | 2000-01-04 | 2000-07-05 | $7700.00 | Window Closed / Lapsed |